1716 lines
39 KiB
Go
1716 lines
39 KiB
Go
package splitstore
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import (
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"bytes"
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"context"
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"encoding/binary"
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"errors"
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"os"
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"runtime"
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"sort"
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"sync"
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"sync/atomic"
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"time"
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"go.uber.org/multierr"
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"golang.org/x/xerrors"
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blocks "github.com/ipfs/go-block-format"
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cid "github.com/ipfs/go-cid"
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dstore "github.com/ipfs/go-datastore"
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logging "github.com/ipfs/go-log/v2"
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mh "github.com/multiformats/go-multihash"
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cbg "github.com/whyrusleeping/cbor-gen"
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"github.com/filecoin-project/go-state-types/abi"
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bstore "github.com/filecoin-project/lotus/blockstore"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/chain/types"
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"github.com/filecoin-project/lotus/metrics"
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"go.opencensus.io/stats"
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)
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var (
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// CompactionThreshold is the number of epochs that need to have elapsed
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// from the previously compacted epoch to trigger a new compaction.
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//
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// |················· CompactionThreshold ··················|
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// | |
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// =======‖≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡‖------------------------»
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// | | chain --> ↑__ current epoch
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// | archived epochs ___↑
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// ↑________ CompactionBoundary
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//
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// === :: cold (already archived)
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// ≡≡≡ :: to be archived in this compaction
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// --- :: hot
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CompactionThreshold = 5 * build.Finality
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// CompactionBoundary is the number of epochs from the current epoch at which
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// we will walk the chain for live objects.
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CompactionBoundary = 4 * build.Finality
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// SyncGapTime is the time delay from a tipset's min timestamp before we decide
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// there is a sync gap
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SyncGapTime = time.Minute
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)
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var (
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// baseEpochKey stores the base epoch (last compaction epoch) in the
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// metadata store.
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baseEpochKey = dstore.NewKey("/splitstore/baseEpoch")
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// warmupEpochKey stores whether a hot store warmup has been performed.
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// On first start, the splitstore will walk the state tree and will copy
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// all active blocks into the hotstore.
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warmupEpochKey = dstore.NewKey("/splitstore/warmupEpoch")
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// markSetSizeKey stores the current estimate for the mark set size.
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// this is first computed at warmup and updated in every compaction
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markSetSizeKey = dstore.NewKey("/splitstore/markSetSize")
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log = logging.Logger("splitstore")
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// used to signal end of walk
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errStopWalk = errors.New("stop walk")
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// set this to true if you are debugging the splitstore to enable debug logging
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enableDebugLog = false
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// set this to true if you want to track origin stack traces in the write log
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enableDebugLogWriteTraces = false
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)
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const (
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batchSize = 16384
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defaultColdPurgeSize = 7_000_000
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)
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type Config struct {
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// MarkSetType is the type of mark set to use.
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//
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// Only current sane value is "map", but we may add an option for a disk-backed
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// markset for memory-constrained situations.
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MarkSetType string
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// DiscardColdBlocks indicates whether to skip moving cold blocks to the coldstore.
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// If the splitstore is running with a noop coldstore then this option is set to true
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// which skips moving (as it is a noop, but still takes time to read all the cold objects)
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// and directly purges cold blocks.
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DiscardColdBlocks bool
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}
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// ChainAccessor allows the Splitstore to access the chain. It will most likely
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// be a ChainStore at runtime.
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type ChainAccessor interface {
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GetTipsetByHeight(context.Context, abi.ChainEpoch, *types.TipSet, bool) (*types.TipSet, error)
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GetHeaviestTipSet() *types.TipSet
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SubscribeHeadChanges(change func(revert []*types.TipSet, apply []*types.TipSet) error)
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}
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type SplitStore struct {
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compacting int32 // compaction (or warmp up) in progress
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critsection int32 // compaction critical section
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closing int32 // the splitstore is closing
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cfg *Config
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mx sync.Mutex
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warmupEpoch abi.ChainEpoch // protected by mx
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baseEpoch abi.ChainEpoch // protected by compaction lock
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coldPurgeSize int
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chain ChainAccessor
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ds dstore.Datastore
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hot bstore.Blockstore
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cold bstore.Blockstore
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markSetEnv MarkSetEnv
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markSetSize int64
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ctx context.Context
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cancel func()
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debug *debugLog
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// transactional protection for concurrent read/writes during compaction
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txnLk sync.RWMutex
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txnActive bool
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txnViews *sync.WaitGroup
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txnProtect MarkSet
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txnRefsMx sync.Mutex
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txnRefs map[cid.Cid]struct{}
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txnMissing map[cid.Cid]struct{}
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}
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var _ bstore.Blockstore = (*SplitStore)(nil)
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func init() {
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if os.Getenv("LOTUS_SPLITSTORE_DEBUG_LOG") == "1" {
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enableDebugLog = true
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}
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if os.Getenv("LOTUS_SPLITSTORE_DEBUG_LOG_WRITE_TRACES") == "1" {
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enableDebugLogWriteTraces = true
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}
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}
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// Open opens an existing splistore, or creates a new splitstore. The splitstore
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// is backed by the provided hot and cold stores. The returned SplitStore MUST be
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// attached to the ChainStore with Start in order to trigger compaction.
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func Open(path string, ds dstore.Datastore, hot, cold bstore.Blockstore, cfg *Config) (*SplitStore, error) {
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// hot blockstore must support BlockstoreIterator
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if _, ok := hot.(bstore.BlockstoreIterator); !ok {
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return nil, xerrors.Errorf("hot blockstore does not support efficient iteration: %T", hot)
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}
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// the markset env
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markSetEnv, err := OpenMarkSetEnv(path, cfg.MarkSetType)
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if err != nil {
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return nil, err
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}
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// and now we can make a SplitStore
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ss := &SplitStore{
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cfg: cfg,
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ds: ds,
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hot: hot,
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cold: cold,
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markSetEnv: markSetEnv,
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txnViews: new(sync.WaitGroup),
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coldPurgeSize: defaultColdPurgeSize,
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}
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ss.ctx, ss.cancel = context.WithCancel(context.Background())
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if enableDebugLog {
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ss.debug, err = openDebugLog(path)
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if err != nil {
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return nil, err
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}
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}
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return ss, nil
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}
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// Blockstore interface
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func (s *SplitStore) DeleteBlock(_ cid.Cid) error {
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// afaict we don't seem to be using this method, so it's not implemented
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return errors.New("DeleteBlock not implemented on SplitStore; don't do this Luke!") //nolint
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}
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func (s *SplitStore) DeleteMany(_ []cid.Cid) error {
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// afaict we don't seem to be using this method, so it's not implemented
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return errors.New("DeleteMany not implemented on SplitStore; don't do this Luke!") //nolint
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}
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func (s *SplitStore) Has(cid cid.Cid) (bool, error) {
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if isIdentiyCid(cid) {
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return true, nil
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}
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s.txnLk.RLock()
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defer s.txnLk.RUnlock()
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has, err := s.hot.Has(cid)
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if err != nil {
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return has, err
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}
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if has {
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s.trackTxnRef(cid)
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return true, nil
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}
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return s.cold.Has(cid)
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}
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func (s *SplitStore) Get(cid cid.Cid) (blocks.Block, error) {
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if isIdentiyCid(cid) {
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data, err := decodeIdentityCid(cid)
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if err != nil {
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return nil, err
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}
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return blocks.NewBlockWithCid(data, cid)
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}
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s.txnLk.RLock()
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defer s.txnLk.RUnlock()
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blk, err := s.hot.Get(cid)
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switch err {
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case nil:
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s.trackTxnRef(cid)
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return blk, nil
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case bstore.ErrNotFound:
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if s.debug != nil {
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s.mx.Lock()
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warm := s.warmupEpoch > 0
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s.mx.Unlock()
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if warm {
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s.debug.LogReadMiss(cid)
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}
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}
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blk, err = s.cold.Get(cid)
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if err == nil {
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stats.Record(context.Background(), metrics.SplitstoreMiss.M(1))
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}
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return blk, err
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default:
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return nil, err
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}
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}
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func (s *SplitStore) GetSize(cid cid.Cid) (int, error) {
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if isIdentiyCid(cid) {
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data, err := decodeIdentityCid(cid)
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if err != nil {
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return 0, err
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}
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return len(data), nil
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}
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s.txnLk.RLock()
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defer s.txnLk.RUnlock()
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size, err := s.hot.GetSize(cid)
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switch err {
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case nil:
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s.trackTxnRef(cid)
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return size, nil
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case bstore.ErrNotFound:
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if s.debug != nil {
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s.mx.Lock()
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warm := s.warmupEpoch > 0
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s.mx.Unlock()
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if warm {
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s.debug.LogReadMiss(cid)
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}
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}
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size, err = s.cold.GetSize(cid)
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if err == nil {
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stats.Record(context.Background(), metrics.SplitstoreMiss.M(1))
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}
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return size, err
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default:
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return 0, err
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}
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}
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func (s *SplitStore) Put(blk blocks.Block) error {
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if isIdentiyCid(blk.Cid()) {
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return nil
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}
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s.txnLk.RLock()
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defer s.txnLk.RUnlock()
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err := s.hot.Put(blk)
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if err != nil {
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return err
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}
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s.debug.LogWrite(blk)
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s.trackTxnRef(blk.Cid())
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return nil
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}
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func (s *SplitStore) PutMany(blks []blocks.Block) error {
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// filter identites
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idcids := 0
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for _, blk := range blks {
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if isIdentiyCid(blk.Cid()) {
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idcids++
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}
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}
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if idcids > 0 {
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if idcids == len(blks) {
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// it's all identities
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return nil
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}
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filtered := make([]blocks.Block, 0, len(blks)-idcids)
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for _, blk := range blks {
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if isIdentiyCid(blk.Cid()) {
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continue
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}
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filtered = append(filtered, blk)
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}
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blks = filtered
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}
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batch := make([]cid.Cid, 0, len(blks))
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for _, blk := range blks {
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batch = append(batch, blk.Cid())
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}
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s.txnLk.RLock()
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defer s.txnLk.RUnlock()
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err := s.hot.PutMany(blks)
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if err != nil {
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return err
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}
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s.debug.LogWriteMany(blks)
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s.trackTxnRefMany(batch)
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return nil
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}
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func (s *SplitStore) AllKeysChan(ctx context.Context) (<-chan cid.Cid, error) {
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ctx, cancel := context.WithCancel(ctx)
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chHot, err := s.hot.AllKeysChan(ctx)
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if err != nil {
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cancel()
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return nil, err
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}
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chCold, err := s.cold.AllKeysChan(ctx)
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if err != nil {
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cancel()
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return nil, err
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}
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ch := make(chan cid.Cid)
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go func() {
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defer cancel()
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defer close(ch)
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for _, in := range []<-chan cid.Cid{chHot, chCold} {
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for cid := range in {
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select {
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case ch <- cid:
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case <-ctx.Done():
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return
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}
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}
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}
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}()
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return ch, nil
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}
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func (s *SplitStore) HashOnRead(enabled bool) {
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s.hot.HashOnRead(enabled)
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s.cold.HashOnRead(enabled)
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}
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func (s *SplitStore) View(cid cid.Cid, cb func([]byte) error) error {
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if isIdentiyCid(cid) {
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data, err := decodeIdentityCid(cid)
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if err != nil {
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return err
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}
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return cb(data)
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}
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// views are (optimistically) protected two-fold:
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// - if there is an active transaction, then the reference is protected.
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// - if there is no active transaction, active views are tracked in a
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// wait group and compaction is inhibited from starting until they
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// have all completed. this is necessary to ensure that a (very) long-running
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// view can't have its data pointer deleted, which would be catastrophic.
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// Note that we can't just RLock for the duration of the view, as this could
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// lead to deadlock with recursive views.
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wg := s.protectView(cid)
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if wg != nil {
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defer wg.Done()
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}
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err := s.hot.View(cid, cb)
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switch err {
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case bstore.ErrNotFound:
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if s.debug != nil {
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s.mx.Lock()
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warm := s.warmupEpoch > 0
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s.mx.Unlock()
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if warm {
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s.debug.LogReadMiss(cid)
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}
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}
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err = s.cold.View(cid, cb)
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if err == nil {
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stats.Record(context.Background(), metrics.SplitstoreMiss.M(1))
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}
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return err
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default:
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return err
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}
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}
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// State tracking
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func (s *SplitStore) Start(chain ChainAccessor) error {
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s.chain = chain
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curTs := chain.GetHeaviestTipSet()
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// load base epoch from metadata ds
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// if none, then use current epoch because it's a fresh start
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bs, err := s.ds.Get(baseEpochKey)
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switch err {
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case nil:
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s.baseEpoch = bytesToEpoch(bs)
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case dstore.ErrNotFound:
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if curTs == nil {
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// this can happen in some tests
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break
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}
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err = s.setBaseEpoch(curTs.Height())
|
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if err != nil {
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return xerrors.Errorf("error saving base epoch: %w", err)
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}
|
|
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default:
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return xerrors.Errorf("error loading base epoch: %w", err)
|
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}
|
|
|
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// load warmup epoch from metadata ds
|
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bs, err = s.ds.Get(warmupEpochKey)
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switch err {
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case nil:
|
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s.warmupEpoch = bytesToEpoch(bs)
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|
|
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case dstore.ErrNotFound:
|
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// the hotstore hasn't warmed up, start a concurrent warm up
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err = s.warmup(curTs)
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if err != nil {
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return xerrors.Errorf("error warming up: %w", err)
|
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}
|
|
|
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default:
|
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return xerrors.Errorf("error loading warmup epoch: %w", err)
|
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}
|
|
|
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// load markSetSize from metadata ds to provide a size hint for marksets
|
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bs, err = s.ds.Get(markSetSizeKey)
|
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switch err {
|
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case nil:
|
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s.markSetSize = bytesToInt64(bs)
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|
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case dstore.ErrNotFound:
|
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default:
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return xerrors.Errorf("error loading mark set size: %w", err)
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}
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|
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log.Infow("starting splitstore", "baseEpoch", s.baseEpoch, "warmupEpoch", s.warmupEpoch)
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|
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// watch the chain
|
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chain.SubscribeHeadChanges(s.HeadChange)
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|
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return nil
|
|
}
|
|
|
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func (s *SplitStore) Close() error {
|
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atomic.StoreInt32(&s.closing, 1)
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|
|
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if atomic.LoadInt32(&s.critsection) == 1 {
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log.Warn("ongoing compaction in critical section; waiting for it to finish...")
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for atomic.LoadInt32(&s.critsection) == 1 {
|
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time.Sleep(time.Second)
|
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}
|
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}
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|
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s.cancel()
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return multierr.Combine(s.markSetEnv.Close(), s.debug.Close())
|
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}
|
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|
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func (s *SplitStore) HeadChange(_, apply []*types.TipSet) error {
|
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// Revert only.
|
|
if len(apply) == 0 {
|
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return nil
|
|
}
|
|
|
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curTs := apply[len(apply)-1]
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epoch := curTs.Height()
|
|
|
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if !atomic.CompareAndSwapInt32(&s.compacting, 0, 1) {
|
|
// we are currently compacting -- protect the new tipset(s)
|
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s.protectTipSets(apply)
|
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return nil
|
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}
|
|
|
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timestamp := time.Unix(int64(curTs.MinTimestamp()), 0)
|
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if time.Since(timestamp) > SyncGapTime {
|
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// don't attempt compaction before we have caught up syncing
|
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atomic.StoreInt32(&s.compacting, 0)
|
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return nil
|
|
}
|
|
|
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if epoch-s.baseEpoch > CompactionThreshold {
|
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// it's time to compact -- prepare the transaction and go!
|
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wg := s.beginTxnProtect()
|
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go func() {
|
|
defer atomic.StoreInt32(&s.compacting, 0)
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defer s.endTxnProtect()
|
|
|
|
log.Info("compacting splitstore")
|
|
start := time.Now()
|
|
|
|
s.compact(curTs, wg)
|
|
|
|
log.Infow("compaction done", "took", time.Since(start))
|
|
}()
|
|
} else {
|
|
// no compaction necessary
|
|
atomic.StoreInt32(&s.compacting, 0)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// transactionally protect incoming tipsets
|
|
func (s *SplitStore) protectTipSets(apply []*types.TipSet) {
|
|
s.txnLk.RLock()
|
|
defer s.txnLk.RUnlock()
|
|
|
|
if !s.txnActive {
|
|
return
|
|
}
|
|
|
|
var cids []cid.Cid
|
|
for _, ts := range apply {
|
|
cids = append(cids, ts.Cids()...)
|
|
}
|
|
|
|
s.trackTxnRefMany(cids)
|
|
}
|
|
|
|
// transactionally protect a view
|
|
func (s *SplitStore) protectView(c cid.Cid) *sync.WaitGroup {
|
|
s.txnLk.RLock()
|
|
defer s.txnLk.RUnlock()
|
|
|
|
if !s.txnActive {
|
|
s.txnViews.Add(1)
|
|
return s.txnViews
|
|
}
|
|
|
|
s.trackTxnRef(c)
|
|
return nil
|
|
}
|
|
|
|
// transactionally protect a reference to an object
|
|
func (s *SplitStore) trackTxnRef(c cid.Cid) {
|
|
if !s.txnActive {
|
|
// not compacting
|
|
return
|
|
}
|
|
|
|
if isUnitaryObject(c) {
|
|
return
|
|
}
|
|
|
|
if s.txnProtect != nil {
|
|
mark, err := s.txnProtect.Has(c)
|
|
if err != nil {
|
|
log.Warnf("error checking markset: %s", err)
|
|
goto track
|
|
}
|
|
|
|
if mark {
|
|
return
|
|
}
|
|
}
|
|
|
|
track:
|
|
s.txnRefsMx.Lock()
|
|
s.txnRefs[c] = struct{}{}
|
|
s.txnRefsMx.Unlock()
|
|
return
|
|
}
|
|
|
|
// transactionally protect a batch of references
|
|
func (s *SplitStore) trackTxnRefMany(cids []cid.Cid) {
|
|
if !s.txnActive {
|
|
// not compacting
|
|
return
|
|
}
|
|
|
|
s.txnRefsMx.Lock()
|
|
quiet := false
|
|
for _, c := range cids {
|
|
if isUnitaryObject(c) {
|
|
continue
|
|
}
|
|
|
|
if s.txnProtect != nil {
|
|
mark, err := s.txnProtect.Has(c)
|
|
if err != nil {
|
|
if !quiet {
|
|
quiet = true
|
|
log.Warnf("error checking markset: %s", err)
|
|
}
|
|
continue
|
|
}
|
|
|
|
if mark {
|
|
continue
|
|
}
|
|
}
|
|
|
|
s.txnRefs[c] = struct{}{}
|
|
}
|
|
s.txnRefsMx.Unlock()
|
|
return
|
|
}
|
|
|
|
// protect all pending transactional references
|
|
func (s *SplitStore) protectTxnRefs(markSet MarkSet) error {
|
|
for {
|
|
var txnRefs map[cid.Cid]struct{}
|
|
|
|
s.txnRefsMx.Lock()
|
|
if len(s.txnRefs) > 0 {
|
|
txnRefs = s.txnRefs
|
|
s.txnRefs = make(map[cid.Cid]struct{})
|
|
}
|
|
s.txnRefsMx.Unlock()
|
|
|
|
if len(txnRefs) == 0 {
|
|
return nil
|
|
}
|
|
|
|
log.Infow("protecting transactional references", "refs", len(txnRefs))
|
|
count := 0
|
|
workch := make(chan cid.Cid, len(txnRefs))
|
|
startProtect := time.Now()
|
|
|
|
for c := range txnRefs {
|
|
mark, err := markSet.Has(c)
|
|
if err != nil {
|
|
return xerrors.Errorf("error checking markset: %w", err)
|
|
}
|
|
|
|
if mark {
|
|
continue
|
|
}
|
|
|
|
workch <- c
|
|
count++
|
|
}
|
|
|
|
if count == 0 {
|
|
return nil
|
|
}
|
|
|
|
workers := runtime.NumCPU() / 2
|
|
if workers < 2 {
|
|
workers = 2
|
|
}
|
|
if workers > count {
|
|
workers = count
|
|
}
|
|
|
|
close(workch)
|
|
|
|
worker := func(wg *sync.WaitGroup) {
|
|
if wg != nil {
|
|
defer wg.Done()
|
|
}
|
|
|
|
for c := range workch {
|
|
err := s.doTxnProtect(c, markSet)
|
|
if err != nil {
|
|
log.Warnf("error protecting transactional references: %s", err)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
if workers > 1 {
|
|
wg := new(sync.WaitGroup)
|
|
for i := 0; i < workers; i++ {
|
|
wg.Add(1)
|
|
go worker(wg)
|
|
}
|
|
wg.Wait()
|
|
} else {
|
|
worker(nil)
|
|
}
|
|
|
|
log.Infow("protecting transactional refs done", "took", time.Since(startProtect), "protected", count)
|
|
}
|
|
}
|
|
|
|
// transactionally protect a reference by walking the object and marking.
|
|
// concurrent markings are short circuited by checking the markset.
|
|
func (s *SplitStore) doTxnProtect(root cid.Cid, markSet MarkSet) error {
|
|
// Note: cold objects are deleted heaviest first, so the consituents of an object
|
|
// cannot be deleted before the object itself.
|
|
return s.walkObjectIncomplete(root, cid.NewSet(),
|
|
func(c cid.Cid) error {
|
|
if isUnitaryObject(c) {
|
|
return errStopWalk
|
|
}
|
|
|
|
mark, err := markSet.Has(c)
|
|
if err != nil {
|
|
return xerrors.Errorf("error checking markset: %w", err)
|
|
}
|
|
|
|
// it's marked, nothing to do
|
|
if mark {
|
|
return errStopWalk
|
|
}
|
|
|
|
return markSet.Mark(c)
|
|
},
|
|
func(c cid.Cid) error {
|
|
if s.txnMissing != nil {
|
|
log.Warnf("missing object reference %s in %s", c, root)
|
|
s.txnRefsMx.Lock()
|
|
s.txnMissing[c] = struct{}{}
|
|
s.txnRefsMx.Unlock()
|
|
}
|
|
return errStopWalk
|
|
})
|
|
}
|
|
|
|
// warmup acuiqres the compaction lock and spawns a goroutine to warm up the hotstore;
|
|
// this is necessary when we sync from a snapshot or when we enable the splitstore
|
|
// on top of an existing blockstore (which becomes the coldstore).
|
|
func (s *SplitStore) warmup(curTs *types.TipSet) error {
|
|
if !atomic.CompareAndSwapInt32(&s.compacting, 0, 1) {
|
|
return xerrors.Errorf("error locking compaction")
|
|
}
|
|
|
|
go func() {
|
|
defer atomic.StoreInt32(&s.compacting, 0)
|
|
|
|
log.Info("warming up hotstore")
|
|
start := time.Now()
|
|
|
|
err := s.doWarmup(curTs)
|
|
if err != nil {
|
|
log.Errorf("error warming up hotstore: %s", err)
|
|
return
|
|
}
|
|
|
|
log.Infow("warm up done", "took", time.Since(start))
|
|
}()
|
|
|
|
return nil
|
|
}
|
|
|
|
// the actual warmup procedure; it walks the chain loading all state roots at the boundary
|
|
// and headers all the way up to genesis.
|
|
// objects are written in batches so as to minimize overhead.
|
|
func (s *SplitStore) doWarmup(curTs *types.TipSet) error {
|
|
epoch := curTs.Height()
|
|
batchHot := make([]blocks.Block, 0, batchSize)
|
|
count := int64(0)
|
|
xcount := int64(0)
|
|
missing := int64(0)
|
|
err := s.walkChain(curTs, epoch, false,
|
|
func(c cid.Cid) error {
|
|
if isUnitaryObject(c) {
|
|
return errStopWalk
|
|
}
|
|
|
|
count++
|
|
|
|
has, err := s.hot.Has(c)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if has {
|
|
return nil
|
|
}
|
|
|
|
blk, err := s.cold.Get(c)
|
|
if err != nil {
|
|
if err == bstore.ErrNotFound {
|
|
missing++
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
|
|
xcount++
|
|
|
|
batchHot = append(batchHot, blk)
|
|
if len(batchHot) == batchSize {
|
|
err = s.hot.PutMany(batchHot)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
batchHot = batchHot[:0]
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(batchHot) > 0 {
|
|
err = s.hot.PutMany(batchHot)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
log.Infow("warmup stats", "visited", count, "warm", xcount, "missing", missing)
|
|
|
|
s.markSetSize = count + count>>2 // overestimate a bit
|
|
err = s.ds.Put(markSetSizeKey, int64ToBytes(s.markSetSize))
|
|
if err != nil {
|
|
log.Warnf("error saving mark set size: %s", err)
|
|
}
|
|
|
|
// save the warmup epoch
|
|
err = s.ds.Put(warmupEpochKey, epochToBytes(epoch))
|
|
if err != nil {
|
|
return xerrors.Errorf("error saving warm up epoch: %w", err)
|
|
}
|
|
s.mx.Lock()
|
|
s.warmupEpoch = epoch
|
|
s.mx.Unlock()
|
|
|
|
return nil
|
|
}
|
|
|
|
// --- Compaction ---
|
|
// Compaction works transactionally with the following algorithm:
|
|
// - We prepare a transaction, whereby all i/o referenced objects through the API are tracked.
|
|
// - We walk the chain and mark reachable objects, keeping 4 finalities of state roots and messages and all headers all the way to genesis.
|
|
// - Once the chain walk is complete, we begin full transaction protection with concurrent marking; we walk and mark all references created during the chain walk. On the same time, all I/O through the API concurrently marks objects as live references.
|
|
// - We collect cold objects by iterating through the hotstore and checking the mark set; if an object is not marked, then it is candidate for purge.
|
|
// - When running with a coldstore, we next copy all cold objects to the coldstore.
|
|
// - At this point we are ready to begin purging:
|
|
// - We sort cold objects heaviest first, so as to never delete the consituents of a DAG before the DAG itself (which would leave dangling references)
|
|
// - We delete in small batches taking a lock; each batch is checked again for marks, from the concurrent transactional mark, so as to never delete anything live
|
|
// - We then end the transaction and compact/gc the hotstore.
|
|
func (s *SplitStore) compact(curTs *types.TipSet, wg *sync.WaitGroup) {
|
|
log.Info("waiting for active views to complete")
|
|
start := time.Now()
|
|
wg.Wait()
|
|
log.Infow("waiting for active views done", "took", time.Since(start))
|
|
|
|
start = time.Now()
|
|
err := s.doCompact(curTs)
|
|
took := time.Since(start).Milliseconds()
|
|
stats.Record(context.Background(), metrics.SplitstoreCompactionTimeSeconds.M(float64(took)/1e3))
|
|
|
|
if err != nil {
|
|
log.Errorf("COMPACTION ERROR: %s", err)
|
|
}
|
|
}
|
|
|
|
func (s *SplitStore) doCompact(curTs *types.TipSet) error {
|
|
currentEpoch := curTs.Height()
|
|
boundaryEpoch := currentEpoch - CompactionBoundary
|
|
|
|
log.Infow("running compaction", "currentEpoch", currentEpoch, "baseEpoch", s.baseEpoch, "boundaryEpoch", boundaryEpoch)
|
|
|
|
markSet, err := s.markSetEnv.Create("live", s.markSetSize)
|
|
if err != nil {
|
|
return xerrors.Errorf("error creating mark set: %w", err)
|
|
}
|
|
defer markSet.Close() //nolint:errcheck
|
|
defer s.debug.Flush()
|
|
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// we are ready for concurrent marking
|
|
s.beginTxnMarking(markSet)
|
|
|
|
// 1. mark reachable objects by walking the chain from the current epoch; we keep state roots
|
|
// and messages until the boundary epoch.
|
|
log.Info("marking reachable objects")
|
|
startMark := time.Now()
|
|
|
|
var count int64
|
|
err = s.walkChain(curTs, boundaryEpoch, true,
|
|
func(c cid.Cid) error {
|
|
if isUnitaryObject(c) {
|
|
return errStopWalk
|
|
}
|
|
|
|
count++
|
|
return markSet.Mark(c)
|
|
})
|
|
|
|
if err != nil {
|
|
return xerrors.Errorf("error marking: %w", err)
|
|
}
|
|
|
|
s.markSetSize = count + count>>2 // overestimate a bit
|
|
|
|
log.Infow("marking done", "took", time.Since(startMark), "marked", count)
|
|
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// 1.1 protect transactional refs
|
|
err = s.protectTxnRefs(markSet)
|
|
if err != nil {
|
|
return xerrors.Errorf("error protecting transactional refs: %w", err)
|
|
}
|
|
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// 2. iterate through the hotstore to collect cold objects
|
|
log.Info("collecting cold objects")
|
|
startCollect := time.Now()
|
|
|
|
// some stats for logging
|
|
var hotCnt, coldCnt int
|
|
|
|
cold := make([]cid.Cid, 0, s.coldPurgeSize)
|
|
err = s.hot.(bstore.BlockstoreIterator).ForEachKey(func(c cid.Cid) error {
|
|
// was it marked?
|
|
mark, err := markSet.Has(c)
|
|
if err != nil {
|
|
return xerrors.Errorf("error checking mark set for %s: %w", c, err)
|
|
}
|
|
|
|
if mark {
|
|
hotCnt++
|
|
return nil
|
|
}
|
|
|
|
// it's cold, mark it as candidate for move
|
|
cold = append(cold, c)
|
|
coldCnt++
|
|
|
|
return nil
|
|
})
|
|
|
|
if err != nil {
|
|
return xerrors.Errorf("error collecting cold objects: %w", err)
|
|
}
|
|
|
|
log.Infow("cold collection done", "took", time.Since(startCollect))
|
|
|
|
if coldCnt > 0 {
|
|
s.coldPurgeSize = coldCnt + coldCnt>>2 // overestimate a bit
|
|
}
|
|
|
|
log.Infow("compaction stats", "hot", hotCnt, "cold", coldCnt)
|
|
stats.Record(context.Background(), metrics.SplitstoreCompactionHot.M(int64(hotCnt)))
|
|
stats.Record(context.Background(), metrics.SplitstoreCompactionCold.M(int64(coldCnt)))
|
|
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// now that we have collected cold objects, check for missing references from transactional i/o
|
|
// and disable further collection of such references (they will not be acted upon as we can't
|
|
// possibly delete objects we didn't have when we were collecting cold objects)
|
|
s.waitForMissingRefs(markSet)
|
|
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// 3. copy the cold objects to the coldstore -- if we have one
|
|
if !s.cfg.DiscardColdBlocks {
|
|
log.Info("moving cold objects to the coldstore")
|
|
startMove := time.Now()
|
|
err = s.moveColdBlocks(cold)
|
|
if err != nil {
|
|
return xerrors.Errorf("error moving cold objects: %w", err)
|
|
}
|
|
log.Infow("moving done", "took", time.Since(startMove))
|
|
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// 4. sort cold objects so that the dags with most references are deleted first
|
|
// this ensures that we can't refer to a dag with its consituents already deleted, ie
|
|
// we lave no dangling references.
|
|
log.Info("sorting cold objects")
|
|
startSort := time.Now()
|
|
err = s.sortObjects(cold)
|
|
if err != nil {
|
|
return xerrors.Errorf("error sorting objects: %w", err)
|
|
}
|
|
log.Infow("sorting done", "took", time.Since(startSort))
|
|
|
|
// 4.1 protect transactional refs once more
|
|
err = s.protectTxnRefs(markSet)
|
|
if err != nil {
|
|
return xerrors.Errorf("error protecting transactional refs: %w", err)
|
|
}
|
|
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Enter critical section
|
|
log.Info("entering critical section")
|
|
atomic.StoreInt32(&s.critsection, 1)
|
|
defer atomic.StoreInt32(&s.critsection, 0)
|
|
|
|
// check to see if we are closing first; if that's the case just return
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// 5. purge cold objects from the hotstore, taking protected references into account
|
|
log.Info("purging cold objects from the hotstore")
|
|
startPurge := time.Now()
|
|
err = s.purge(cold, markSet)
|
|
if err != nil {
|
|
return xerrors.Errorf("error purging cold blocks: %w", err)
|
|
}
|
|
log.Infow("purging cold objects from hotstore done", "took", time.Since(startPurge))
|
|
|
|
// we are done; do some housekeeping
|
|
s.endTxnProtect()
|
|
s.gcHotstore()
|
|
|
|
err = s.setBaseEpoch(boundaryEpoch)
|
|
if err != nil {
|
|
return xerrors.Errorf("error saving base epoch: %w", err)
|
|
}
|
|
|
|
err = s.ds.Put(markSetSizeKey, int64ToBytes(s.markSetSize))
|
|
if err != nil {
|
|
return xerrors.Errorf("error saving mark set size: %w", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *SplitStore) beginTxnProtect() *sync.WaitGroup {
|
|
log.Info("preparing compaction transaction")
|
|
|
|
s.txnLk.Lock()
|
|
defer s.txnLk.Unlock()
|
|
|
|
s.txnActive = true
|
|
s.txnRefs = make(map[cid.Cid]struct{})
|
|
s.txnMissing = make(map[cid.Cid]struct{})
|
|
|
|
wg := s.txnViews
|
|
s.txnViews = nil
|
|
|
|
return wg
|
|
}
|
|
|
|
func (s *SplitStore) beginTxnMarking(markSet MarkSet) {
|
|
markSet.SetConcurrent()
|
|
|
|
s.txnLk.Lock()
|
|
s.txnProtect = markSet
|
|
s.txnLk.Unlock()
|
|
}
|
|
|
|
func (s *SplitStore) endTxnProtect() {
|
|
s.txnLk.Lock()
|
|
defer s.txnLk.Unlock()
|
|
|
|
if !s.txnActive {
|
|
return
|
|
}
|
|
|
|
s.txnActive = false
|
|
s.txnProtect = nil
|
|
s.txnRefs = nil
|
|
s.txnMissing = nil
|
|
s.txnViews = new(sync.WaitGroup)
|
|
}
|
|
|
|
func (s *SplitStore) walkChain(ts *types.TipSet, boundary abi.ChainEpoch, inclMsgs bool,
|
|
f func(cid.Cid) error) error {
|
|
visited := cid.NewSet()
|
|
walked := cid.NewSet()
|
|
toWalk := ts.Cids()
|
|
walkCnt := 0
|
|
scanCnt := 0
|
|
|
|
walkBlock := func(c cid.Cid) error {
|
|
if !visited.Visit(c) {
|
|
return nil
|
|
}
|
|
|
|
walkCnt++
|
|
|
|
if err := f(c); err != nil {
|
|
return err
|
|
}
|
|
|
|
var hdr types.BlockHeader
|
|
err := s.view(c, func(data []byte) error {
|
|
return hdr.UnmarshalCBOR(bytes.NewBuffer(data))
|
|
})
|
|
|
|
if err != nil {
|
|
return xerrors.Errorf("error unmarshaling block header (cid: %s): %w", c, err)
|
|
}
|
|
|
|
// we only scan the block if it is at or above the boundary
|
|
if hdr.Height >= boundary || hdr.Height == 0 {
|
|
scanCnt++
|
|
if inclMsgs && hdr.Height > 0 {
|
|
if err := s.walkObject(hdr.Messages, walked, f); err != nil {
|
|
return xerrors.Errorf("error walking messages (cid: %s): %w", hdr.Messages, err)
|
|
}
|
|
|
|
if err := s.walkObject(hdr.ParentMessageReceipts, walked, f); err != nil {
|
|
return xerrors.Errorf("error walking message receipts (cid: %s): %w", hdr.ParentMessageReceipts, err)
|
|
}
|
|
}
|
|
|
|
if err := s.walkObject(hdr.ParentStateRoot, walked, f); err != nil {
|
|
return xerrors.Errorf("error walking state root (cid: %s): %w", hdr.ParentStateRoot, err)
|
|
}
|
|
}
|
|
|
|
if hdr.Height > 0 {
|
|
toWalk = append(toWalk, hdr.Parents...)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
for len(toWalk) > 0 {
|
|
// walking can take a while, so check this with every opportunity
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
walking := toWalk
|
|
toWalk = nil
|
|
for _, c := range walking {
|
|
if err := walkBlock(c); err != nil {
|
|
return xerrors.Errorf("error walking block (cid: %s): %w", c, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
log.Infow("chain walk done", "walked", walkCnt, "scanned", scanCnt)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *SplitStore) walkObject(c cid.Cid, walked *cid.Set, f func(cid.Cid) error) error {
|
|
if !walked.Visit(c) {
|
|
return nil
|
|
}
|
|
|
|
if err := f(c); err != nil {
|
|
if err == errStopWalk {
|
|
return nil
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
if c.Prefix().Codec != cid.DagCBOR {
|
|
return nil
|
|
}
|
|
|
|
var links []cid.Cid
|
|
err := s.view(c, func(data []byte) error {
|
|
return cbg.ScanForLinks(bytes.NewReader(data), func(c cid.Cid) {
|
|
links = append(links, c)
|
|
})
|
|
})
|
|
|
|
if err != nil {
|
|
return xerrors.Errorf("error scanning linked block (cid: %s): %w", c, err)
|
|
}
|
|
|
|
for _, c := range links {
|
|
err := s.walkObject(c, walked, f)
|
|
if err != nil {
|
|
return xerrors.Errorf("error walking link (cid: %s): %w", c, err)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// like walkObject, but the object may be potentially incomplete (references missing)
|
|
func (s *SplitStore) walkObjectIncomplete(c cid.Cid, walked *cid.Set, f, missing func(cid.Cid) error) error {
|
|
if !walked.Visit(c) {
|
|
return nil
|
|
}
|
|
|
|
// occurs check -- only for DAGs
|
|
if c.Prefix().Codec == cid.DagCBOR {
|
|
has, err := s.has(c)
|
|
if err != nil {
|
|
return xerrors.Errorf("error occur checking %s: %w", c, err)
|
|
}
|
|
|
|
if !has {
|
|
err = missing(c)
|
|
if err == errStopWalk {
|
|
return nil
|
|
}
|
|
|
|
return err
|
|
}
|
|
}
|
|
|
|
if err := f(c); err != nil {
|
|
if err == errStopWalk {
|
|
return nil
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
if c.Prefix().Codec != cid.DagCBOR {
|
|
return nil
|
|
}
|
|
|
|
var links []cid.Cid
|
|
err := s.view(c, func(data []byte) error {
|
|
return cbg.ScanForLinks(bytes.NewReader(data), func(c cid.Cid) {
|
|
links = append(links, c)
|
|
})
|
|
})
|
|
|
|
if err != nil {
|
|
return xerrors.Errorf("error scanning linked block (cid: %s): %w", c, err)
|
|
}
|
|
|
|
for _, c := range links {
|
|
err := s.walkObjectIncomplete(c, walked, f, missing)
|
|
if err != nil {
|
|
return xerrors.Errorf("error walking link (cid: %s): %w", c, err)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// internal version used by walk
|
|
func (s *SplitStore) view(cid cid.Cid, cb func([]byte) error) error {
|
|
err := s.hot.View(cid, cb)
|
|
switch err {
|
|
case bstore.ErrNotFound:
|
|
return s.cold.View(cid, cb)
|
|
|
|
default:
|
|
return err
|
|
}
|
|
}
|
|
|
|
func (s *SplitStore) has(c cid.Cid) (bool, error) {
|
|
has, err := s.hot.Has(c)
|
|
|
|
if has || err != nil {
|
|
return has, err
|
|
}
|
|
|
|
return s.cold.Has(c)
|
|
}
|
|
|
|
func (s *SplitStore) checkClosing() error {
|
|
if atomic.LoadInt32(&s.closing) == 1 {
|
|
log.Info("splitstore is closing; aborting compaction")
|
|
return xerrors.Errorf("compaction aborted")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *SplitStore) moveColdBlocks(cold []cid.Cid) error {
|
|
batch := make([]blocks.Block, 0, batchSize)
|
|
|
|
for _, c := range cold {
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
blk, err := s.hot.Get(c)
|
|
if err != nil {
|
|
if err == bstore.ErrNotFound {
|
|
log.Warnf("hotstore missing block %s", c)
|
|
continue
|
|
}
|
|
|
|
return xerrors.Errorf("error retrieving block %s from hotstore: %w", c, err)
|
|
}
|
|
|
|
batch = append(batch, blk)
|
|
if len(batch) == batchSize {
|
|
err = s.cold.PutMany(batch)
|
|
if err != nil {
|
|
return xerrors.Errorf("error putting batch to coldstore: %w", err)
|
|
}
|
|
batch = batch[:0]
|
|
}
|
|
}
|
|
|
|
if len(batch) > 0 {
|
|
err := s.cold.PutMany(batch)
|
|
if err != nil {
|
|
return xerrors.Errorf("error putting batch to coldstore: %w", err)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// sorts a slice of objects heaviest first -- it's a little expensive but worth the
|
|
// guarantee that we don't leave dangling references behind, e.g. if we die in the middle
|
|
// of a purge.
|
|
func (s *SplitStore) sortObjects(cids []cid.Cid) error {
|
|
// we cache the keys to avoid making a gazillion of strings
|
|
keys := make(map[cid.Cid]string)
|
|
key := func(c cid.Cid) string {
|
|
s, ok := keys[c]
|
|
if !ok {
|
|
s = string(c.Hash())
|
|
keys[c] = s
|
|
}
|
|
return s
|
|
}
|
|
|
|
// compute sorting weights as the cumulative number of DAG links
|
|
weights := make(map[string]int)
|
|
for _, c := range cids {
|
|
// this can take quite a while, so check for shutdown with every opportunity
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
w := s.getObjectWeight(c, weights, key)
|
|
weights[key(c)] = w
|
|
}
|
|
|
|
// sort!
|
|
sort.Slice(cids, func(i, j int) bool {
|
|
wi := weights[key(cids[i])]
|
|
wj := weights[key(cids[j])]
|
|
if wi == wj {
|
|
return bytes.Compare(cids[i].Hash(), cids[j].Hash()) > 0
|
|
}
|
|
|
|
return wi > wj
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *SplitStore) getObjectWeight(c cid.Cid, weights map[string]int, key func(cid.Cid) string) int {
|
|
w, ok := weights[key(c)]
|
|
if ok {
|
|
return w
|
|
}
|
|
|
|
// we treat block headers specially to avoid walking the entire chain
|
|
var hdr types.BlockHeader
|
|
err := s.view(c, func(data []byte) error {
|
|
return hdr.UnmarshalCBOR(bytes.NewBuffer(data))
|
|
})
|
|
if err == nil {
|
|
w1 := s.getObjectWeight(hdr.ParentStateRoot, weights, key)
|
|
weights[key(hdr.ParentStateRoot)] = w1
|
|
|
|
w2 := s.getObjectWeight(hdr.Messages, weights, key)
|
|
weights[key(hdr.Messages)] = w2
|
|
|
|
return 1 + w1 + w2
|
|
}
|
|
|
|
var links []cid.Cid
|
|
err = s.view(c, func(data []byte) error {
|
|
return cbg.ScanForLinks(bytes.NewReader(data), func(c cid.Cid) {
|
|
links = append(links, c)
|
|
})
|
|
})
|
|
if err != nil {
|
|
return 1
|
|
}
|
|
|
|
w = 1
|
|
for _, c := range links {
|
|
// these are internal refs, so dags will be dags
|
|
if c.Prefix().Codec != cid.DagCBOR {
|
|
w++
|
|
continue
|
|
}
|
|
|
|
wc := s.getObjectWeight(c, weights, key)
|
|
weights[key(c)] = wc
|
|
|
|
w += wc
|
|
}
|
|
|
|
return w
|
|
}
|
|
|
|
func (s *SplitStore) purgeBatch(cids []cid.Cid, deleteBatch func([]cid.Cid) error) error {
|
|
if len(cids) == 0 {
|
|
return nil
|
|
}
|
|
|
|
// we don't delete one giant batch of millions of objects, but rather do smaller batches
|
|
// so that we don't stop the world for an extended period of time
|
|
done := false
|
|
for i := 0; !done; i++ {
|
|
start := i * batchSize
|
|
end := start + batchSize
|
|
if end >= len(cids) {
|
|
end = len(cids)
|
|
done = true
|
|
}
|
|
|
|
err := deleteBatch(cids[start:end])
|
|
if err != nil {
|
|
return xerrors.Errorf("error deleting batch: %w", err)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *SplitStore) purge(cids []cid.Cid, markSet MarkSet) error {
|
|
deadCids := make([]cid.Cid, 0, batchSize)
|
|
var purgeCnt, liveCnt int
|
|
defer func() {
|
|
log.Infow("purged cold objects", "purged", purgeCnt, "live", liveCnt)
|
|
}()
|
|
|
|
return s.purgeBatch(cids,
|
|
func(cids []cid.Cid) error {
|
|
deadCids := deadCids[:0]
|
|
|
|
again:
|
|
if err := s.checkClosing(); err != nil {
|
|
return err
|
|
}
|
|
|
|
s.txnLk.Lock()
|
|
if len(s.txnRefs) > 0 {
|
|
s.txnLk.Unlock()
|
|
|
|
err := s.protectTxnRefs(markSet)
|
|
if err != nil {
|
|
return xerrors.Errorf("error protecting transactional refs: %w", err)
|
|
}
|
|
|
|
goto again
|
|
}
|
|
|
|
defer s.txnLk.Unlock()
|
|
for _, c := range cids {
|
|
live, err := markSet.Has(c)
|
|
if err != nil {
|
|
return xerrors.Errorf("error checking for liveness: %w", err)
|
|
}
|
|
|
|
if live {
|
|
liveCnt++
|
|
continue
|
|
}
|
|
|
|
deadCids = append(deadCids, c)
|
|
}
|
|
|
|
err := s.hot.DeleteMany(deadCids)
|
|
if err != nil {
|
|
return xerrors.Errorf("error purging cold objects: %w", err)
|
|
}
|
|
|
|
s.debug.LogDelete(deadCids)
|
|
|
|
purgeCnt += len(deadCids)
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// I really don't like having this code, but we seem to have some occasional DAG references with
|
|
// missing constituents. During testing in mainnet *some* of these references *sometimes* appeared
|
|
// after a little bit.
|
|
// We need to figure out where they are coming from and eliminate that vector, but until then we
|
|
// have this gem[TM].
|
|
// My best guess is that they are parent message receipts or yet to be computed state roots; magik
|
|
// thinks the cause may be block validation.
|
|
func (s *SplitStore) waitForMissingRefs(markSet MarkSet) {
|
|
s.txnLk.Lock()
|
|
missing := s.txnMissing
|
|
s.txnMissing = nil
|
|
s.txnLk.Unlock()
|
|
|
|
if len(missing) == 0 {
|
|
return
|
|
}
|
|
|
|
log.Info("waiting for missing references")
|
|
start := time.Now()
|
|
count := 0
|
|
defer func() {
|
|
log.Infow("waiting for missing references done", "took", time.Since(start), "marked", count)
|
|
}()
|
|
|
|
for i := 0; i < 3 && len(missing) > 0; i++ {
|
|
if err := s.checkClosing(); err != nil {
|
|
return
|
|
}
|
|
|
|
wait := time.Duration(i) * time.Minute
|
|
log.Infof("retrying for %d missing references in %s (attempt: %d)", len(missing), wait, i+1)
|
|
if wait > 0 {
|
|
time.Sleep(wait)
|
|
}
|
|
|
|
towalk := missing
|
|
walked := cid.NewSet()
|
|
missing = make(map[cid.Cid]struct{})
|
|
|
|
for c := range towalk {
|
|
err := s.walkObjectIncomplete(c, walked,
|
|
func(c cid.Cid) error {
|
|
if isUnitaryObject(c) {
|
|
return errStopWalk
|
|
}
|
|
|
|
mark, err := markSet.Has(c)
|
|
if err != nil {
|
|
return xerrors.Errorf("error checking markset for %s: %w", c, err)
|
|
}
|
|
|
|
if mark {
|
|
return errStopWalk
|
|
}
|
|
|
|
count++
|
|
return markSet.Mark(c)
|
|
},
|
|
func(c cid.Cid) error {
|
|
missing[c] = struct{}{}
|
|
return errStopWalk
|
|
})
|
|
|
|
if err != nil {
|
|
log.Warnf("error marking: %s", err)
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(missing) > 0 {
|
|
log.Warnf("still missing %d references", len(missing))
|
|
for c := range missing {
|
|
log.Warnf("unresolved missing reference: %s", c)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (s *SplitStore) gcHotstore() {
|
|
if compact, ok := s.hot.(interface{ Compact() error }); ok {
|
|
log.Infof("compacting hotstore")
|
|
startCompact := time.Now()
|
|
err := compact.Compact()
|
|
if err != nil {
|
|
log.Warnf("error compacting hotstore: %s", err)
|
|
return
|
|
}
|
|
log.Infow("hotstore compaction done", "took", time.Since(startCompact))
|
|
}
|
|
|
|
if gc, ok := s.hot.(interface{ CollectGarbage() error }); ok {
|
|
log.Infof("garbage collecting hotstore")
|
|
startGC := time.Now()
|
|
err := gc.CollectGarbage()
|
|
if err != nil {
|
|
log.Warnf("error garbage collecting hotstore: %s", err)
|
|
return
|
|
}
|
|
log.Infow("hotstore garbage collection done", "took", time.Since(startGC))
|
|
}
|
|
}
|
|
|
|
func (s *SplitStore) setBaseEpoch(epoch abi.ChainEpoch) error {
|
|
s.baseEpoch = epoch
|
|
return s.ds.Put(baseEpochKey, epochToBytes(epoch))
|
|
}
|
|
|
|
func epochToBytes(epoch abi.ChainEpoch) []byte {
|
|
return uint64ToBytes(uint64(epoch))
|
|
}
|
|
|
|
func bytesToEpoch(buf []byte) abi.ChainEpoch {
|
|
return abi.ChainEpoch(bytesToUint64(buf))
|
|
}
|
|
|
|
func int64ToBytes(i int64) []byte {
|
|
return uint64ToBytes(uint64(i))
|
|
}
|
|
|
|
func bytesToInt64(buf []byte) int64 {
|
|
return int64(bytesToUint64(buf))
|
|
}
|
|
|
|
func uint64ToBytes(i uint64) []byte {
|
|
buf := make([]byte, 16)
|
|
n := binary.PutUvarint(buf, i)
|
|
return buf[:n]
|
|
}
|
|
|
|
func bytesToUint64(buf []byte) uint64 {
|
|
i, _ := binary.Uvarint(buf)
|
|
return i
|
|
}
|
|
|
|
func isUnitaryObject(c cid.Cid) bool {
|
|
pre := c.Prefix()
|
|
switch pre.Codec {
|
|
case cid.FilCommitmentSealed, cid.FilCommitmentUnsealed:
|
|
return true
|
|
default:
|
|
return pre.MhType == mh.IDENTITY
|
|
}
|
|
}
|
|
|
|
func isIdentiyCid(c cid.Cid) bool {
|
|
return c.Prefix().MhType == mh.IDENTITY
|
|
}
|
|
|
|
func decodeIdentityCid(c cid.Cid) ([]byte, error) {
|
|
dmh, err := mh.Decode(c.Hash())
|
|
if err != nil {
|
|
return nil, xerrors.Errorf("error decoding identity cid %s: %w", c, err)
|
|
}
|
|
|
|
// sanity check
|
|
if dmh.Code != mh.IDENTITY {
|
|
return nil, xerrors.Errorf("error decoding identity cid %s: hash type is not identity", c)
|
|
}
|
|
|
|
return dmh.Digest, nil
|
|
}
|