51 lines
1.7 KiB
Go
51 lines
1.7 KiB
Go
package repo
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import badgerbs "github.com/filecoin-project/lotus/lib/blockstore/badger"
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// BadgerBlockstoreOptions returns the badger options to apply for the provided
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// domain.
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func BadgerBlockstoreOptions(domain BlockstoreDomain, path string, readonly bool) (badgerbs.Options, error) {
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if domain != BlockstoreChain {
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return badgerbs.Options{}, ErrInvalidBlockstoreDomain
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}
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opts := badgerbs.DefaultOptions(path)
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// Due to legacy usage of blockstore.Blockstore, over a datastore, all
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// blocks are prefixed with this namespace. In the future, this can go away,
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// in order to shorten keys, but it'll require a migration.
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opts.Prefix = "/blocks/"
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// Blockstore values are immutable; therefore we do not expect any
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// conflicts to emerge.
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opts.DetectConflicts = false
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// This is to optimize the database on close so it can be opened
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// read-only and efficiently queried.
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opts.CompactL0OnClose = true
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// The alternative is "crash on start and tell the user to fix it". This
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// will truncate corrupt and unsynced data, which we don't guarantee to
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// persist anyways.
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opts.Truncate = true
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// We mmap the index and the value logs; this is important to enable
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// zero-copy value access.
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opts.ValueLogLoadingMode = badgerbs.MemoryMap
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opts.TableLoadingMode = badgerbs.MemoryMap
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// Embed only values < 128 bytes in the LSM tree; larger values are stored
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// in value logs.
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opts.ValueThreshold = 128
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// Default table size is already 64MiB. This is here to make it explicit.
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opts.MaxTableSize = 64 << 20
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// NOTE: The chain blockstore doesn't require any GC (blocks are never
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// deleted). This will change if we move to a tiered blockstore.
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opts.ReadOnly = readonly
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return opts, nil
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}
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