XFS

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This page is a translated version of the page XFS and the translation is 55% complete.
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XFS 文件系统是一个高性能日志文件系统。它兼容 ACL (POSIX),可与 Linux 一起使用。

XFS has a particularly strong reputation for reliability and led to the creation of the venerable xfstests Linux kernel test suite which now tests regressions in various filesystems.

安装

内核

内核 启用 XFS 支持 (CONFIG_XFS_FS:)
File systems  --->
   <*> XFS filesystem support

可选:

内核 启用可选的 XFS 特性
File systems  --->
   [*]   XFS Quota support
   [*]   XFS POSIX ACL support
   [*]   XFS Realtime subvolume support
   [ ]   XFS Verbose Warnings
   [ ]   XFS Debugging support

Emerge

XFS用户空间实用程序 需要 sys-fs/xfsprogs 软件包:

root #emerge --ask sys-fs/xfsprogs

使用

使用 mount 命令挂载 XFS 文件系统。

Make an XFS filesystem with mkfs.xfs from xfsprogs:

root #mkfs.xfs -L 'label'

The label is optional. Further tuning on creation might be interesting for use as a RAID, multi-terabyte drives, and doing the journaling for a HDD on a separate SSD.

XFS supports SSD discards in /etc/fstab.

Maintenance

支持 2038 年时间戳(bigtime)

Older partitions (created with <xfsprogs-5.15) will not have bigtime enabled by default. Mounting such partitions results in a warning like:

root #dmesg
...
[    4.036258] xfs filesystem being mounted at /home supports timestamps until 2038 (0x7fffffff)
...

To check the current version of xfsprogs, run mkfs.xfs -V. There's no need for this on up-to-date Gentoo systems, but it might be necessary if using install media from another distribution with older userland.

The bigtime code support was enabled by default in xfsprogs 5.15, so manual setting is not required in newer versions.

Beginning with kernel 5.10, XFS gained bigtime support to extend the maximum recorded date stamps from 2038 to 2486 for the V5 on-disk format.[1]

To upgrade an older filesystem to bigtime, first cleanly unmount the file system. The upgrade will refuse to run if the unmount was not completely clean.

然后运行:

root #xfs_admin -O bigtime=1 /dev/sda1

使用设备路径替换 /dev/sda1

附注
XFS on the root mount will require an initramfs or other live environment with the necessary tools to perform an upgrade to the metadata.

Using Dracut initramfs to perform the upgrade

First, Dracut needs additional files included in the initramfs in order to perform the upgrade. This can be accomplished with either the --install option or inside a configuration file using the install_items option.

root #dracut --install "/usr/sbin/xfs_admin /usr/bin/expr" ...

Then, the kernel command line option can be modified to include rd.break=pre-mount to stop the initramfs just before it would mount the root filesystem. Ensure this is done temporarily and removed on subsequent reboots after upgrade.

移除

To schedule removal at the next run:

root #emerge --ask --depclean --verbose sys-fs/xfsprogs

另请参阅

  • FAT文件系统 最初用于MS-DOS(和之后的,NT内核之前的Windows)。
  • Ext4 — 一个开源的磁盘文件系统并且是扩展系列文件系统的最新版本。
  • Btrfs — 一个写入时复制(CoW) 的 Linux 文件系统 ,旨在实现高级功能的同时专注于容错、修复和易于管理等功能。

参考