lotus/node/repo/fsrepo_ds.go

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package repo
import (
"os"
"path/filepath"
"github.com/ipfs/go-datastore"
"golang.org/x/xerrors"
dgbadger "github.com/dgraph-io/badger/v2"
badger "github.com/ipfs/go-ds-badger2"
levelds "github.com/ipfs/go-ds-leveldb"
measure "github.com/ipfs/go-ds-measure"
ldbopts "github.com/syndtr/goleveldb/leveldb/opt"
)
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type dsCtor func(path string) (datastore.Batching, error)
var fsDatastores = map[string]dsCtor{
"chain": badgerDs,
"metadata": levelDs,
// Those need to be fast for large writes... but also need a really good GC :c
"staging": badgerDs, // miner specific
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"client": badgerDs, // client specific
}
func badgerDs(path string) (datastore.Batching, error) {
opts := badger.DefaultOptions
opts.Options = dgbadger.DefaultOptions("").WithTruncate(true).
WithValueThreshold(1 << 10)
return badger.NewDatastore(path, &opts)
}
func levelDs(path string) (datastore.Batching, error) {
return levelds.NewDatastore(path, &levelds.Options{
Compression: ldbopts.NoCompression,
})
}
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func (fsr *fsLockedRepo) openDatastores() (map[string]datastore.Batching, error) {
if err := os.MkdirAll(fsr.join(fsDatastore), 0755); err != nil {
return nil, xerrors.Errorf("mkdir %s: %w", fsr.join(fsDatastore), err)
}
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out := map[string]datastore.Batching{}
for p, ctor := range fsDatastores {
prefix := datastore.NewKey(p)
// TODO: optimization: don't init datastores we don't need
ds, err := ctor(fsr.join(filepath.Join(fsDatastore, p)))
if err != nil {
return nil, xerrors.Errorf("opening datastore %s: %w", prefix, err)
}
ds = measure.New("fsrepo."+p, ds)
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out[datastore.NewKey(p).String()] = ds
}
return out, nil
}
func (fsr *fsLockedRepo) Datastore(ns string) (datastore.Batching, error) {
fsr.dsOnce.Do(func() {
fsr.ds, fsr.dsErr = fsr.openDatastores()
})
if fsr.dsErr != nil {
return nil, fsr.dsErr
}
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ds, ok := fsr.ds[ns]
if ok {
return ds, nil
}
return nil, xerrors.Errorf("no such datastore: %s", ns)
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}