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package storage
import (
"fmt"
"os"
"sync/atomic"
. "github.com/chrislusf/seaweedfs/weed/storage/types"
"github.com/willf/bloom"
)
type mapMetric struct {
DeletionCounter uint32 `json:"DeletionCounter"`
FileCounter uint32 `json:"FileCounter"`
DeletionByteCounter uint64 `json:"DeletionByteCounter"`
FileByteCounter uint64 `json:"FileByteCounter"`
MaximumFileKey uint64 `json:"MaxFileKey"`
}
func (mm *mapMetric) logDelete(deletedByteCount uint32) {
mm.LogDeletionCounter(deletedByteCount)
}
func (mm *mapMetric) logPut(key NeedleId, oldSize uint32, newSize uint32) {
mm.MaybeSetMaxFileKey(key)
mm.LogFileCounter(newSize)
if oldSize > 0 && oldSize != TombstoneFileSize {
mm.LogDeletionCounter(oldSize)
}
}
func (mm mapMetric) LogFileCounter(newSize uint32) {
atomic.AddUint32(&mm.FileCounter, 1)
atomic.AddUint64(&mm.FileByteCounter, uint64(newSize))
}
func (mm mapMetric) LogDeletionCounter(oldSize uint32) {
if oldSize > 0 {
atomic.AddUint32(&mm.DeletionCounter, 1)
atomic.AddUint64(&mm.DeletionByteCounter, uint64(oldSize))
}
}
func (mm mapMetric) ContentSize() uint64 {
return atomic.LoadUint64(&mm.FileByteCounter)
}
func (mm mapMetric) DeletedSize() uint64 {
return atomic.LoadUint64(&mm.DeletionByteCounter)
}
func (mm mapMetric) FileCount() int {
return int(atomic.LoadUint32(&mm.FileCounter))
}
func (mm mapMetric) DeletedCount() int {
return int(atomic.LoadUint32(&mm.DeletionCounter))
}
func (mm mapMetric) MaxFileKey() NeedleId {
t := uint64(mm.MaximumFileKey)
return NeedleId(t)
}
func (mm mapMetric) MaybeSetMaxFileKey(key NeedleId) {
if key > mm.MaxFileKey() {
atomic.StoreUint64(&mm.MaximumFileKey, uint64(key))
}
}
func newNeedleMapMetricFromIndexFile(r *os.File) (mm *mapMetric, err error) {
mm = &mapMetric{}
var bf *bloom.BloomFilter
buf := make([]byte, NeedleIdSize)
err = reverseWalkIndexFile(r, func(entryCount int64) {
bf = bloom.NewWithEstimates(uint(entryCount), 0.001)
}, func(key NeedleId, offset Offset, size uint32) error {
mm.MaybeSetMaxFileKey(key)
NeedleIdToBytes(buf, key)
if size != TombstoneFileSize {
mm.FileByteCounter += uint64(size)
}
if !bf.Test(buf) {
mm.FileCounter++
bf.Add(buf)
} else {
// deleted file
mm.DeletionCounter++
if size != TombstoneFileSize {
// previously already deleted file
mm.DeletionByteCounter += uint64(size)
}
}
return nil
})
return
}
func reverseWalkIndexFile(r *os.File, initFn func(entryCount int64), fn func(key NeedleId, offset Offset, size uint32) error) error {
fi, err := r.Stat()
if err != nil {
return fmt.Errorf("file %s stat error: %v", r.Name(), err)
}
fileSize := fi.Size()
if fileSize%NeedleMapEntrySize != 0 {
return fmt.Errorf("unexpected file %s size: %d", r.Name(), fileSize)
}
entryCount := fileSize / NeedleMapEntrySize
initFn(entryCount)
batchSize := int64(1024 * 4)
bytes := make([]byte, NeedleMapEntrySize*batchSize)
nextBatchSize := entryCount % batchSize
if nextBatchSize == 0 {
nextBatchSize = batchSize
}
remainingCount := entryCount - nextBatchSize
for remainingCount >= 0 {
_, e := r.ReadAt(bytes[:NeedleMapEntrySize*nextBatchSize], NeedleMapEntrySize*remainingCount)
// glog.V(0).Infoln("file", r.Name(), "readerOffset", NeedleMapEntrySize*remainingCount, "count", count, "e", e)
if e != nil {
return e
}
for i := int(nextBatchSize) - 1; i >= 0; i-- {
key, offset, size := IdxFileEntry(bytes[i*NeedleMapEntrySize : i*NeedleMapEntrySize+NeedleMapEntrySize])
if e = fn(key, offset, size); e != nil {
return e
}
}
nextBatchSize = batchSize
remainingCount -= nextBatchSize
}
return nil
}
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