mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
112 lines
3.3 KiB
Go
112 lines
3.3 KiB
Go
package mergeset
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import (
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"sync"
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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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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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)
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type inmemoryPart struct {
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ph partHeader
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sb storageBlock
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bh blockHeader
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mr metaindexRow
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unpackedIndexBlockBuf []byte
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packedIndexBlockBuf []byte
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unpackedMetaindexBuf []byte
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packedMetaindexBuf []byte
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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 (ip *inmemoryPart) Reset() {
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ip.ph.Reset()
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ip.sb.Reset()
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ip.bh.Reset()
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ip.mr.Reset()
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ip.unpackedIndexBlockBuf = ip.unpackedIndexBlockBuf[:0]
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ip.packedIndexBlockBuf = ip.packedIndexBlockBuf[:0]
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ip.unpackedMetaindexBuf = ip.unpackedMetaindexBuf[:0]
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ip.packedMetaindexBuf = ip.packedMetaindexBuf[:0]
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ip.metaindexData.Reset()
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ip.indexData.Reset()
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ip.itemsData.Reset()
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ip.lensData.Reset()
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}
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// Init initializes ip from ib.
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func (ip *inmemoryPart) Init(ib *inmemoryBlock) {
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ip.Reset()
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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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compressLevel := 0
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ip.bh.firstItem, ip.bh.commonPrefix, ip.bh.itemsCount, ip.bh.marshalType = ib.MarshalUnsortedData(&ip.sb, ip.bh.firstItem[:0], ip.bh.commonPrefix[:0], compressLevel)
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ip.ph.itemsCount = uint64(len(ib.items))
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ip.ph.blocksCount = 1
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ip.ph.firstItem = append(ip.ph.firstItem[:0], ib.items[0]...)
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ip.ph.lastItem = append(ip.ph.lastItem[:0], ib.items[len(ib.items)-1]...)
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fs.MustWriteData(&ip.itemsData, ip.sb.itemsData)
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ip.bh.itemsBlockOffset = 0
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ip.bh.itemsBlockSize = uint32(len(ip.sb.itemsData))
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fs.MustWriteData(&ip.lensData, ip.sb.lensData)
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ip.bh.lensBlockOffset = 0
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ip.bh.lensBlockSize = uint32(len(ip.sb.lensData))
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ip.unpackedIndexBlockBuf = ip.bh.Marshal(ip.unpackedIndexBlockBuf[:0])
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ip.packedIndexBlockBuf = encoding.CompressZSTDLevel(ip.packedIndexBlockBuf[:0], ip.unpackedIndexBlockBuf, 0)
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fs.MustWriteData(&ip.indexData, ip.packedIndexBlockBuf)
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ip.mr.firstItem = append(ip.mr.firstItem[:0], ip.bh.firstItem...)
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ip.mr.blockHeadersCount = 1
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ip.mr.indexBlockOffset = 0
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ip.mr.indexBlockSize = uint32(len(ip.packedIndexBlockBuf))
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ip.unpackedMetaindexBuf = ip.mr.Marshal(ip.unpackedMetaindexBuf[:0])
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ip.packedMetaindexBuf = encoding.CompressZSTDLevel(ip.packedMetaindexBuf[:0], ip.unpackedMetaindexBuf, 0)
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fs.MustWriteData(&ip.metaindexData, ip.packedMetaindexBuf)
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}
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// It is safe calling NewPart multiple times.
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// It is unsafe re-using ip while the returned part is in use.
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func (ip *inmemoryPart) NewPart() *part {
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ph := ip.ph
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size := ip.size()
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p, err := newPart(&ph, "", size, ip.metaindexData.NewReader(), &ip.indexData, &ip.itemsData, &ip.lensData)
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if err != nil {
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logger.Panicf("BUG: cannot create a part from inmemoryPart: %s", err)
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}
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return p
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}
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func (ip *inmemoryPart) size() uint64 {
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return uint64(len(ip.metaindexData.B) + len(ip.indexData.B) + len(ip.itemsData.B) + len(ip.lensData.B))
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}
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func getInmemoryPart() *inmemoryPart {
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v := ipPool.Get()
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if v == nil {
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return &inmemoryPart{}
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}
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return v.(*inmemoryPart)
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}
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func putInmemoryPart(ip *inmemoryPart) {
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ip.Reset()
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ipPool.Put(ip)
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}
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var ipPool sync.Pool
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