d4566d4aaa
* compare chunks by timestamp * fix slab clearing error * fix test compilation * move oldest chunk to sealed, instead of by fullness * lock on fh.entryViewCache * remove verbose logs * revert slat clearing * less logs * less logs * track write and read by timestamp * remove useless logic * add entry lock on file handle release * use mem chunk only, swap file chunk has problems * comment out code that maybe used later * add debug mode to compare data read and write * more efficient readResolvedChunks with linked list * small optimization * fix test compilation * minor fix on writer * add SeparateGarbageChunks * group chunks into sections * turn off debug mode * fix tests * fix tests * tmp enable swap file chunk * Revert "tmp enable swap file chunk" This reverts commit 985137ec472924e4815f258189f6ca9f2168a0a7. * simple refactoring * simple refactoring * do not re-use swap file chunk. Sealed chunks should not be re-used. * comment out debugging facilities * either mem chunk or swap file chunk is fine now * remove orderedMutex as *semaphore.Weighted not found impactful * optimize size calculation for changing large files * optimize performance to avoid going through the long list of chunks * still problems with swap file chunk * rename * tiny optimization * swap file chunk save only successfully read data * fix * enable both mem and swap file chunk * resolve chunks with range * rename * fix chunk interval list * also change file handle chunk group when adding chunks * pick in-active chunk with time-decayed counter * fix compilation * avoid nil with empty fh.entry * refactoring * rename * rename * refactor visible intervals to *list.List * refactor chunkViews to *list.List * add IntervalList for generic interval list * change visible interval to use IntervalList in generics * cahnge chunkViews to *IntervalList[*ChunkView] * use NewFileChunkSection to create * rename variables * refactor * fix renaming leftover * renaming * renaming * add insert interval * interval list adds lock * incrementally add chunks to readers Fixes: 1. set start and stop offset for the value object 2. clone the value object 3. use pointer instead of copy-by-value when passing to interval.Value 4. use insert interval since adding chunk could be out of order * fix tests compilation * fix tests compilation
102 lines
2.4 KiB
Go
102 lines
2.4 KiB
Go
package page_writer
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import (
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"github.com/seaweedfs/seaweedfs/weed/util"
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"github.com/seaweedfs/seaweedfs/weed/util/mem"
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"sync"
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"sync/atomic"
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)
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var (
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_ = PageChunk(&MemChunk{})
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memChunkCounter int64
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)
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type MemChunk struct {
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sync.RWMutex
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buf []byte
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usage *ChunkWrittenIntervalList
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chunkSize int64
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logicChunkIndex LogicChunkIndex
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activityScore *ActivityScore
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}
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func NewMemChunk(logicChunkIndex LogicChunkIndex, chunkSize int64) *MemChunk {
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atomic.AddInt64(&memChunkCounter, 1)
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return &MemChunk{
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logicChunkIndex: logicChunkIndex,
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chunkSize: chunkSize,
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buf: mem.Allocate(int(chunkSize)),
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usage: newChunkWrittenIntervalList(),
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activityScore: NewActivityScore(),
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}
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}
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func (mc *MemChunk) FreeResource() {
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mc.Lock()
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defer mc.Unlock()
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atomic.AddInt64(&memChunkCounter, -1)
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mem.Free(mc.buf)
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}
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func (mc *MemChunk) WriteDataAt(src []byte, offset int64, tsNs int64) (n int) {
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mc.Lock()
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defer mc.Unlock()
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innerOffset := offset % mc.chunkSize
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n = copy(mc.buf[innerOffset:], src)
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mc.usage.MarkWritten(innerOffset, innerOffset+int64(n), tsNs)
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mc.activityScore.MarkWrite()
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return
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}
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func (mc *MemChunk) ReadDataAt(p []byte, off int64, tsNs int64) (maxStop int64) {
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mc.RLock()
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defer mc.RUnlock()
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memChunkBaseOffset := int64(mc.logicChunkIndex) * mc.chunkSize
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for t := mc.usage.head.next; t != mc.usage.tail; t = t.next {
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logicStart := max(off, memChunkBaseOffset+t.StartOffset)
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logicStop := min(off+int64(len(p)), memChunkBaseOffset+t.stopOffset)
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if logicStart < logicStop {
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if t.TsNs >= tsNs {
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copy(p[logicStart-off:logicStop-off], mc.buf[logicStart-memChunkBaseOffset:logicStop-memChunkBaseOffset])
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maxStop = max(maxStop, logicStop)
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} else {
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println("read old data1", tsNs-t.TsNs, "ns")
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}
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}
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}
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mc.activityScore.MarkRead()
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return
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}
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func (mc *MemChunk) IsComplete() bool {
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mc.RLock()
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defer mc.RUnlock()
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return mc.usage.IsComplete(mc.chunkSize)
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}
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func (mc *MemChunk) ActivityScore() int64 {
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return mc.activityScore.ActivityScore()
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}
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func (mc *MemChunk) SaveContent(saveFn SaveToStorageFunc) {
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mc.RLock()
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defer mc.RUnlock()
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if saveFn == nil {
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return
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}
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for t := mc.usage.head.next; t != mc.usage.tail; t = t.next {
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reader := util.NewBytesReader(mc.buf[t.StartOffset:t.stopOffset])
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saveFn(reader, int64(mc.logicChunkIndex)*mc.chunkSize+t.StartOffset, t.Size(), t.TsNs, func() {
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})
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}
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}
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