volume_create_linux.go 543 B

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  1. //go:build linux
  2. // +build linux
  3. package backend
  4. import (
  5. "os"
  6. "syscall"
  7. "github.com/seaweedfs/seaweedfs/weed/glog"
  8. )
  9. func CreateVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (BackendStorageFile, error) {
  10. file, e := os.OpenFile(fileName, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
  11. if e != nil {
  12. return nil, e
  13. }
  14. if preallocate != 0 {
  15. syscall.Fallocate(int(file.Fd()), 1, 0, preallocate)
  16. glog.V(1).Infof("Preallocated %d bytes disk space for %s", preallocate, fileName)
  17. }
  18. return NewDiskFile(file), nil
  19. }