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https://github.com/VictoriaMetrics/VictoriaMetrics.git
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e2de5bf763
Callers of InitFromFilePart log the error and exit. It is better to log the error with the path to the part and the call stack directly inside the MustInitFromFilePart() function. This simplifies the code at callers' side while leaving the same level of debuggability.
111 lines
3.4 KiB
Go
111 lines
3.4 KiB
Go
package mergeset
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import (
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"path/filepath"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/encoding"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/fs"
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)
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type inmemoryPart struct {
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ph partHeader
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bh blockHeader
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mr metaindexRow
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metaindexData bytesutil.ByteBuffer
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indexData bytesutil.ByteBuffer
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itemsData bytesutil.ByteBuffer
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lensData bytesutil.ByteBuffer
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}
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func (mp *inmemoryPart) Reset() {
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mp.ph.Reset()
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mp.bh.Reset()
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mp.mr.Reset()
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mp.metaindexData.Reset()
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mp.indexData.Reset()
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mp.itemsData.Reset()
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mp.lensData.Reset()
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}
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// MustStoreToDisk stores mp to the given path on disk.
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func (mp *inmemoryPart) MustStoreToDisk(path string) {
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fs.MustMkdirFailIfExist(path)
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metaindexPath := filepath.Join(path, metaindexFilename)
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fs.MustWriteSync(metaindexPath, mp.metaindexData.B)
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indexPath := filepath.Join(path, indexFilename)
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fs.MustWriteSync(indexPath, mp.indexData.B)
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itemsPath := filepath.Join(path, itemsFilename)
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fs.MustWriteSync(itemsPath, mp.itemsData.B)
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lensPath := filepath.Join(path, lensFilename)
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fs.MustWriteSync(lensPath, mp.lensData.B)
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mp.ph.MustWriteMetadata(path)
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fs.MustSyncPath(path)
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// Do not sync parent directory - it must be synced by the caller.
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}
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// Init initializes mp from ib.
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func (mp *inmemoryPart) Init(ib *inmemoryBlock) {
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mp.Reset()
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// Re-use mp.itemsData and mp.lensData in sb.
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// This eliminates copying itemsData and lensData from sb to mp later.
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// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2247
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sb := &storageBlock{}
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sb.itemsData = mp.itemsData.B[:0]
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sb.lensData = mp.lensData.B[:0]
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// Use the minimum possible compressLevel for compressing inmemoryPart,
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// since it will be merged into file part soon.
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// See https://github.com/facebook/zstd/releases/tag/v1.3.4 for details about negative compression level
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compressLevel := -5
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mp.bh.firstItem, mp.bh.commonPrefix, mp.bh.itemsCount, mp.bh.marshalType = ib.MarshalUnsortedData(sb, mp.bh.firstItem[:0], mp.bh.commonPrefix[:0], compressLevel)
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mp.ph.itemsCount = uint64(len(ib.items))
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mp.ph.blocksCount = 1
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mp.ph.firstItem = append(mp.ph.firstItem[:0], ib.items[0].String(ib.data)...)
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mp.ph.lastItem = append(mp.ph.lastItem[:0], ib.items[len(ib.items)-1].String(ib.data)...)
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mp.itemsData.B = sb.itemsData
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mp.bh.itemsBlockOffset = 0
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mp.bh.itemsBlockSize = uint32(len(mp.itemsData.B))
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mp.lensData.B = sb.lensData
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mp.bh.lensBlockOffset = 0
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mp.bh.lensBlockSize = uint32(len(mp.lensData.B))
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bb := inmemoryPartBytePool.Get()
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bb.B = mp.bh.Marshal(bb.B[:0])
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mp.indexData.B = encoding.CompressZSTDLevel(mp.indexData.B[:0], bb.B, compressLevel)
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mp.mr.firstItem = append(mp.mr.firstItem[:0], mp.bh.firstItem...)
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mp.mr.blockHeadersCount = 1
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mp.mr.indexBlockOffset = 0
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mp.mr.indexBlockSize = uint32(len(mp.indexData.B))
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bb.B = mp.mr.Marshal(bb.B[:0])
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mp.metaindexData.B = encoding.CompressZSTDLevel(mp.metaindexData.B[:0], bb.B, compressLevel)
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inmemoryPartBytePool.Put(bb)
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}
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var inmemoryPartBytePool bytesutil.ByteBufferPool
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// It is safe calling NewPart multiple times.
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// It is unsafe re-using mp while the returned part is in use.
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func (mp *inmemoryPart) NewPart() *part {
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size := mp.size()
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p := newPart(&mp.ph, "", size, mp.metaindexData.NewReader(), &mp.indexData, &mp.itemsData, &mp.lensData)
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return p
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}
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func (mp *inmemoryPart) size() uint64 {
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return uint64(cap(mp.metaindexData.B) + cap(mp.indexData.B) + cap(mp.itemsData.B) + cap(mp.lensData.B))
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}
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