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speed up leveldb bolddb loading

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This commit is contained in:
Chris Lu 2018-07-24 22:17:56 -07:00
parent ea8ecf35f4
commit 57ded4fd80
1 changed files with 23 additions and 8 deletions
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29
weed/storage/needle_map_metric.go
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@ -2,7 +2,6 @@ package storage
import (
"fmt"
"github.com/chrislusf/seaweedfs/weed/glog"
. "github.com/chrislusf/seaweedfs/weed/storage/types"
"github.com/willf/bloom"
"os"
@ -91,16 +90,32 @@ func reverseWalkIndexFile(r *os.File, initFn func(entryCount int64), fn func(key
return fmt.Errorf("unexpected file %s size: %d", r.Name(), fileSize)
}
initFn(fileSize / NeedleEntrySize)
entryCount := fileSize / NeedleEntrySize
initFn(entryCount)
bytes := make([]byte, NeedleEntrySize)
for readerOffset := fileSize - NeedleEntrySize; readerOffset >= 0; readerOffset -= NeedleEntrySize {
count, e := r.ReadAt(bytes, readerOffset)
glog.V(3).Infoln("file", r.Name(), "readerOffset", readerOffset, "count", count, "e", e)
key, offset, size := IdxFileEntry(bytes)
batchSize := int64(1024 * 4)
bytes := make([]byte, NeedleEntrySize*batchSize)
nextBatchSize := entryCount % batchSize
if nextBatchSize == 0 {
nextBatchSize = batchSize
}
remainingCount := entryCount - nextBatchSize
for remainingCount >= 0 {
_, e := r.ReadAt(bytes[:NeedleEntrySize*nextBatchSize], NeedleEntrySize*remainingCount)
// glog.V(0).Infoln("file", r.Name(), "readerOffset", NeedleEntrySize*remainingCount, "count", count, "e", e)
if e != nil {
return e
}
for i := int(nextBatchSize) - 1; i >= 0; i-- {
key, offset, size := IdxFileEntry(bytes[i*NeedleEntrySize:i*NeedleEntrySize+NeedleEntrySize])
if e = fn(key, offset, size); e != nil {
return e
}
}
nextBatchSize = batchSize
remainingCount -= nextBatchSize
}
return nil
}