seaweedfs/weed/mount/page_writer.go
Chris Lu d4566d4aaa
more solid weed mount (#4089)
* 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 985137ec47.

* 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
2023-01-02 23:20:45 -08:00

93 lines
2.2 KiB
Go

package mount
import (
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/mount/page_writer"
)
type PageWriter struct {
fh *FileHandle
collection string
replication string
chunkSize int64
writerPattern *WriterPattern
randomWriter page_writer.DirtyPages
}
var (
_ = page_writer.DirtyPages(&PageWriter{})
)
func newPageWriter(fh *FileHandle, chunkSize int64) *PageWriter {
pw := &PageWriter{
fh: fh,
chunkSize: chunkSize,
writerPattern: NewWriterPattern(chunkSize),
randomWriter: newMemoryChunkPages(fh, chunkSize),
}
return pw
}
func (pw *PageWriter) AddPage(offset int64, data []byte, isSequential bool, tsNs int64) {
glog.V(4).Infof("%v AddPage [%d, %d)", pw.fh.fh, offset, offset+int64(len(data)))
chunkIndex := offset / pw.chunkSize
for i := chunkIndex; len(data) > 0; i++ {
writeSize := min(int64(len(data)), (i+1)*pw.chunkSize-offset)
pw.addToOneChunk(i, offset, data[:writeSize], isSequential, tsNs)
offset += writeSize
data = data[writeSize:]
}
}
func (pw *PageWriter) addToOneChunk(chunkIndex, offset int64, data []byte, isSequential bool, tsNs int64) {
pw.randomWriter.AddPage(offset, data, isSequential, tsNs)
}
func (pw *PageWriter) FlushData() error {
return pw.randomWriter.FlushData()
}
func (pw *PageWriter) ReadDirtyDataAt(data []byte, offset int64, tsNs int64) (maxStop int64) {
glog.V(4).Infof("ReadDirtyDataAt %v [%d, %d)", pw.fh.fh, offset, offset+int64(len(data)))
chunkIndex := offset / pw.chunkSize
for i := chunkIndex; len(data) > 0; i++ {
readSize := min(int64(len(data)), (i+1)*pw.chunkSize-offset)
maxStop = pw.randomWriter.ReadDirtyDataAt(data[:readSize], offset, tsNs)
offset += readSize
data = data[readSize:]
}
return
}
func (pw *PageWriter) LockForRead(startOffset, stopOffset int64) {
pw.randomWriter.LockForRead(startOffset, stopOffset)
}
func (pw *PageWriter) UnlockForRead(startOffset, stopOffset int64) {
pw.randomWriter.UnlockForRead(startOffset, stopOffset)
}
func (pw *PageWriter) Destroy() {
pw.randomWriter.Destroy()
}
func max(x, y int64) int64 {
if x > y {
return x
}
return y
}
func min(x, y int64) int64 {
if x < y {
return x
}
return y
}