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lib/storage: pass a single arg - rowsPerBlock - to getCompressLevel() function instead of two args

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This commit is contained in:
Aliaksandr Valialkin 2022-12-03 23:10:16 -08:00
parent bb93494eac
commit 813e8402f6
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GPG Key ID: A72BEC6CD3D0DED1
1 changed files with 10 additions and 10 deletions
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20
lib/storage/partition.go
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@ -1157,7 +1157,8 @@ func (pt *partition) mergeParts(pws []*partWrapper, stopCh <-chan struct{}) erro
mergeIdx := pt.nextMergeIdx()
tmpPartPath := fmt.Sprintf("%s/tmp/%016X", ptPath, mergeIdx)
bsw := getBlockStreamWriter()
compressLevel := getCompressLevel(outRowsCount, outBlocksCount)
rowsPerBlock := float64(outRowsCount) / float64(outBlocksCount)
compressLevel := getCompressLevel(rowsPerBlock)
if err := bsw.InitFromFilePart(tmpPartPath, nocache, compressLevel); err != nil {
return fmt.Errorf("cannot create destination part %q: %w", tmpPartPath, err)
}
@ -1277,28 +1278,27 @@ func (pt *partition) mergeParts(pws []*partWrapper, stopCh <-chan struct{}) erro
return nil
}
func getCompressLevel(rowsCount, blocksCount uint64) int {
avgRowsPerBlock := rowsCount / blocksCount
func getCompressLevel(rowsPerBlock float64) int {
// See https://github.com/facebook/zstd/releases/tag/v1.3.4 about negative compression levels.
if avgRowsPerBlock <= 10 {
if rowsPerBlock <= 10 {
return -5
}
if avgRowsPerBlock <= 50 {
if rowsPerBlock <= 50 {
return -2
}
if avgRowsPerBlock <= 200 {
if rowsPerBlock <= 200 {
return -1
}
if avgRowsPerBlock <= 500 {
if rowsPerBlock <= 500 {
return 1
}
if avgRowsPerBlock <= 1000 {
if rowsPerBlock <= 1000 {
return 2
}
if avgRowsPerBlock <= 2000 {
if rowsPerBlock <= 2000 {
return 3
}
if avgRowsPerBlock <= 4000 {
if rowsPerBlock <= 4000 {
return 4
}
return 5