2019-05-22 23:16:55 +02:00
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package storage
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import (
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2022-12-06 00:27:57 +01:00
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"path/filepath"
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2019-05-22 23:16:55 +02:00
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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2021-07-06 15:28:39 +02:00
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/cgroup"
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2020-05-14 21:01:51 +02:00
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
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2022-12-06 00:27:57 +01:00
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/fs"
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2019-05-22 23:16:55 +02:00
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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)
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// inmemoryPart represents in-memory partition.
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type inmemoryPart struct {
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ph partHeader
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timestampsData bytesutil.ByteBuffer
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valuesData bytesutil.ByteBuffer
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indexData bytesutil.ByteBuffer
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metaindexData bytesutil.ByteBuffer
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2020-05-14 21:01:51 +02:00
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creationTime uint64
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2019-05-22 23:16:55 +02:00
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}
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// Reset resets mp.
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func (mp *inmemoryPart) Reset() {
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mp.ph.Reset()
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mp.timestampsData.Reset()
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mp.valuesData.Reset()
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mp.indexData.Reset()
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mp.metaindexData.Reset()
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2020-05-14 21:01:51 +02:00
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mp.creationTime = 0
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2019-05-22 23:16:55 +02:00
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}
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2023-04-14 07:11:56 +02:00
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// MustStoreToDisk stores the 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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2023-03-25 22:33:54 +01:00
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timestampsPath := filepath.Join(path, timestampsFilename)
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2023-04-14 06:42:11 +02:00
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fs.MustWriteSync(timestampsPath, mp.timestampsData.B)
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2023-04-14 06:33:15 +02:00
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2023-03-25 22:33:54 +01:00
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valuesPath := filepath.Join(path, valuesFilename)
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2023-04-14 06:42:11 +02:00
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fs.MustWriteSync(valuesPath, mp.valuesData.B)
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2023-04-14 06:33:15 +02:00
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2023-03-25 22:33:54 +01:00
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indexPath := filepath.Join(path, indexFilename)
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2023-04-14 06:42:11 +02:00
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fs.MustWriteSync(indexPath, mp.indexData.B)
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2023-04-14 06:33:15 +02:00
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2023-03-25 22:33:54 +01:00
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metaindexPath := filepath.Join(path, metaindexFilename)
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2023-04-14 06:42:11 +02:00
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fs.MustWriteSync(metaindexPath, mp.metaindexData.B)
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2023-04-14 06:33:15 +02:00
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mp.ph.MustWriteMetadata(path)
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2023-04-14 06:18:39 +02:00
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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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2022-12-06 00:27:57 +01:00
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}
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2019-05-22 23:16:55 +02:00
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// InitFromRows initializes mp from the given rows.
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func (mp *inmemoryPart) InitFromRows(rows []rawRow) {
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if len(rows) == 0 {
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logger.Panicf("BUG: Inmemory.InitFromRows must accept at least one row")
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}
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mp.Reset()
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rrm := getRawRowsMarshaler()
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rrm.marshalToInmemoryPart(mp, rows)
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putRawRowsMarshaler(rrm)
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2020-05-14 21:01:51 +02:00
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mp.creationTime = fasttime.UnixTimestamp()
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2019-05-22 23:16:55 +02:00
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}
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// NewPart creates new part from mp.
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//
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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, error) {
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2022-12-04 07:30:30 +01:00
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size := mp.size()
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return newPart(&mp.ph, "", size, mp.metaindexData.NewReader(), &mp.timestampsData, &mp.valuesData, &mp.indexData)
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}
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func (mp *inmemoryPart) size() uint64 {
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return uint64(cap(mp.timestampsData.B) + cap(mp.valuesData.B) + cap(mp.indexData.B) + cap(mp.metaindexData.B))
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2019-05-22 23:16:55 +02:00
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}
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func getInmemoryPart() *inmemoryPart {
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2021-07-06 15:28:39 +02:00
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select {
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case mp := <-mpPool:
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return mp
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default:
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2019-05-22 23:16:55 +02:00
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return &inmemoryPart{}
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}
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}
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func putInmemoryPart(mp *inmemoryPart) {
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mp.Reset()
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2021-07-06 15:28:39 +02:00
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select {
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case mpPool <- mp:
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default:
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// Drop mp in order to reduce memory usage.
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}
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2019-05-22 23:16:55 +02:00
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}
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2021-07-06 15:28:39 +02:00
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// Use chan instead of sync.Pool in order to reduce memory usage on systems with big number of CPU cores,
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// since sync.Pool maintains per-CPU pool of inmemoryPart objects.
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//
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// The inmemoryPart object size can exceed 64KB, so it is better to use chan instead of sync.Pool for reducing memory usage.
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var mpPool = make(chan *inmemoryPart, cgroup.AvailableCPUs())
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