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a little optimization

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This commit is contained in:
Chris Lu 2020-04-12 01:13:57 -07:00
parent 2a1f396df5
commit e613695af7
1 changed files with 5 additions and 1 deletions
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6
weed/filer2/reader_at.go
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@ -105,9 +105,11 @@ func (c *ChunkReadAt) fetchChunkData(chunkView *ChunkView) (data []byte, err err
// fmt.Printf("fetching %s [%d,%d)\n", chunkView.FileId, chunkView.LogicOffset, chunkView.LogicOffset+int64(chunkView.Size)) // fmt.Printf("fetching %s [%d,%d)\n", chunkView.FileId, chunkView.LogicOffset, chunkView.LogicOffset+int64(chunkView.Size))
hasDataInCache := false
chunkData := c.chunkCache.GetChunk(chunkView.FileId) chunkData := c.chunkCache.GetChunk(chunkView.FileId)
if chunkData != nil { if chunkData != nil {
glog.V(3).Infof("cache hit %s [%d,%d)", chunkView.FileId, chunkView.LogicOffset, chunkView.LogicOffset+int64(chunkView.Size)) glog.V(3).Infof("cache hit %s [%d,%d)", chunkView.FileId, chunkView.LogicOffset, chunkView.LogicOffset+int64(chunkView.Size))
hasDataInCache = true
} else { } else {
chunkData, err = c.doFetchFullChunkData(chunkView.FileId, chunkView.CipherKey, chunkView.IsGzipped) chunkData, err = c.doFetchFullChunkData(chunkView.FileId, chunkView.CipherKey, chunkView.IsGzipped)
if err != nil { if err != nil {
@ -121,7 +123,9 @@ func (c *ChunkReadAt) fetchChunkData(chunkView *ChunkView) (data []byte, err err
data = chunkData[chunkView.Offset : chunkView.Offset+int64(chunkView.Size)] data = chunkData[chunkView.Offset : chunkView.Offset+int64(chunkView.Size)]
c.chunkCache.SetChunk(chunkView.FileId, chunkData) if !hasDataInCache {
c.chunkCache.SetChunk(chunkView.FileId, chunkData)
}
return data, nil return data, nil
} }