32 lines
1.5 KiB
Go
32 lines
1.5 KiB
Go
// Copyright 2020 The LevelDB-Go and Pebble Authors. All rights reserved. Use
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// of this source code is governed by a BSD-style license that can be found in
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// the LICENSE file.
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package private
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import "github.com/cockroachdb/pebble/internal/manifest"
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// FlushExternalTable is a hook for linking files into L0 without assigning a
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// global sequence number, mimicking a flush. FlushExternalTable takes a
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// *pebble.DB, the path and the metadata of a sstable to flush directly into
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// L0.
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//
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// Calls to flush a sstable may fail if the file's sequence numbers are not
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// greater than the current commit pipeline's sequence number. On success the
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// commit pipeline's published sequence number will be moved to the file's
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// highest sequence number.
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//
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// This function is wrapped in a safer, more ergonomic API in the
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// internal/replay package. Clients should use the replay package rather than
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// calling this private hook directly.
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var FlushExternalTable func(interface{}, string, *manifest.FileMetadata) error
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// RatchetSeqNum is a hook for allocating and publishing sequence numbers up
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// to a specific absolute value. Its first parameter is a *pebble.DB and its
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// second is the new next sequence number. RatchetSeqNum does nothing if the
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// next sequence is already greater than or equal to nextSeqNum.
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//
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// This function is used by the internal/replay package to ensure replayed
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// operations receive the same absolute sequence number.
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var RatchetSeqNum func(interface{}, uint64)
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