seaweedfs/weed/storage/backend/volume_create.go

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// +build !linux,!windows
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package backend
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import (
"os"
"github.com/chrislusf/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 := os.OpenFile(fileName, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
if e != nil {
return nil, e
}
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if preallocate > 0 {
glog.V(0).Infof("Preallocated disk space for %s is not supported", fileName)
}
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return NewDiskFile(file), nil
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}