mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2026-09-08 15:41:15 +02:00
Chris Lu
1996c6aec6
* volume server: open volume files with O_NOATIME Nothing reads the atime of .dat, .idx, .sdx, or EC files, but every needle read still dirtied the inode: even relatime writes atime on the first read after each write, so an actively written volume paid a metadata write per read/write cycle, and strictatime mounts paid one per read. Open the serving handles with O_NOATIME, falling back to a plain open when the file belongs to another owner (EPERM). Claude-Session: https://claude.ai/code/session_015uVY4diBgEn3VYQoc2eMuD * seaweed-volume: mirror the O_NOATIME volume file opens Same change as the Go volume server: serving handles for .dat, .idx, .sdx, .ecx, .ecj, and shard files open with O_NOATIME on Linux, with a plain-open fallback on EPERM. Claude-Session: https://claude.ai/code/session_015uVY4diBgEn3VYQoc2eMuD * route the tier-down and recreate .dat opens through the no-atime helper Review caught the Rust tier-down swap opening the local .dat directly. The Go swapToLocalDatBackend and the zero-length read-only .dat recreate in maybeWriteSuperBlock had the same gap: all three install long-lived serving handles. Claude-Session: https://claude.ai/code/session_015uVY4diBgEn3VYQoc2eMuD
23 lines
524 B
Go
23 lines
524 B
Go
//go:build linux
|
|
|
|
package backend
|
|
|
|
import (
|
|
"os"
|
|
"syscall"
|
|
|
|
"github.com/seaweedfs/seaweedfs/weed/glog"
|
|
)
|
|
|
|
func CreateVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (BackendStorageFile, error) {
|
|
file, e := OpenVolumeFile(fileName, os.O_RDWR|os.O_CREATE|os.O_TRUNC)
|
|
if e != nil {
|
|
return nil, e
|
|
}
|
|
if preallocate != 0 {
|
|
syscall.Fallocate(int(file.Fd()), 1, 0, preallocate)
|
|
glog.V(1).Infof("Preallocated %d bytes disk space for %s", preallocate, fileName)
|
|
}
|
|
return NewDiskFile(file), nil
|
|
}
|