mount: different write strategy for streaming write and random write

weed/filesys/page_writer/page_chunk.go

@@ -0,0 +1 @@
+package page_writer

weed/filesys/page_writer/writer_pattern.go

@@ -1,31 +0,0 @@
-package page_writer
-
-type WriterPattern struct {
-	isStreaming     bool
-	lastWriteOffset int64
-}
-
-// For streaming write: only cache the first chunk
-// For random write: fall back to temp file approach
-
-func NewWriterPattern() *WriterPattern {
-	return &WriterPattern{
-		isStreaming:     true,
-		lastWriteOffset: 0,
-	}
-}
-
-func (rp *WriterPattern) MonitorWriteAt(offset int64, size int) {
-	if rp.lastWriteOffset > offset {
-		rp.isStreaming = false
-	}
-	rp.lastWriteOffset = offset
-}
-
-func (rp *WriterPattern) IsStreamingMode() bool {
-	return rp.isStreaming
-}
-
-func (rp *WriterPattern) IsRandomMode() bool {
-	return !rp.isStreaming
-}