mirror of https://github.com/minio/minio.git
48 lines
1.8 KiB
Go
48 lines
1.8 KiB
Go
//go:build linux
|
|
// +build linux
|
|
|
|
// Copyright (c) 2015-2021 MinIO, Inc.
|
|
//
|
|
// This file is part of MinIO Object Storage stack
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package disk
|
|
|
|
import (
|
|
"os"
|
|
"syscall"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// Fdatasync - fdatasync() is similar to fsync(), but does not flush modified metadata
|
|
// unless that metadata is needed in order to allow a subsequent data retrieval
|
|
// to be correctly handled. For example, changes to st_atime or st_mtime
|
|
// (respectively, time of last access and time of last modification; see inode(7))
|
|
// do not require flushing because they are not necessary for a subsequent data
|
|
// read to be handled correctly. On the other hand, a change to the file size
|
|
// (st_size, as made by say ftruncate(2)), would require a metadata flush.
|
|
//
|
|
// The aim of fdatasync() is to reduce disk activity for applications that
|
|
// do not require all metadata to be synchronized with the disk.
|
|
func Fdatasync(f *os.File) error {
|
|
return syscall.Fdatasync(int(f.Fd()))
|
|
}
|
|
|
|
// FadviseDontNeed invalidates page-cache
|
|
func FadviseDontNeed(f *os.File) error {
|
|
return unix.Fadvise(int(f.Fd()), 0, 0, unix.FADV_DONTNEED)
|
|
}
|