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//go:build linux
// +build linux
package backend
import (
"os"
"syscall"
"github.com/seaweedfs/seaweedfs/weed/util/log"
)
func CreateVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (BackendStorageFile, error) {
file, e := os.OpenFile(fileName, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
if e != nil {
return nil, e
}
if preallocate != 0 {
syscall.Fallocate(int(file.Fd()), 1, 0, preallocate)
log.V(2).Infof("Preallocated %d bytes disk space for %s", preallocate, fileName)
}
return NewDiskFile(file), nil
}
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