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https://github.com/seaweedfs/seaweedfs.git
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27 lines
690 B
Go
27 lines
690 B
Go
//go:build linux
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package backend
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import (
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"os"
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"golang.org/x/sys/unix"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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)
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func CreateVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (BackendStorageFile, error) {
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file, e := OpenVolumeFile(fileName, os.O_RDWR|os.O_CREATE|os.O_TRUNC)
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if e != nil {
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return nil, e
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}
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if preallocate != 0 {
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if err := unix.Fallocate(int(file.Fd()), unix.FALLOC_FL_KEEP_SIZE, 0, preallocate); err != nil {
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glog.Warningf("Preallocate %d bytes disk space for %s: %v", preallocate, fileName, err)
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} else {
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glog.V(1).Infof("Preallocated %d bytes disk space for %s", preallocate, fileName)
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}
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}
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return NewDiskFile(file), nil
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}
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