приостановить доступ к файловой системе XFS (suspend access to an XFS filesystem)
Имя (Name)
xfs_freeze - suspend access to an XFS filesystem
Синопсис (Synopsis)
xfs_freeze [ -f | -u ] mount-point
xfs_freeze -V
Описание (Description)
xfs_freeze suspends and resumes access to an XFS filesystem (see
xfs(5)).
xfs_freeze halts new access to the filesystem and creates a
stable image on disk. xfs_freeze is intended to be used with
volume managers and hardware RAID devices that support the
creation of snapshots.
The mount-point argument is the pathname of the directory where
the filesystem is mounted. The filesystem must be mounted to be
frozen (see mount(8)).
The -f flag requests the specified XFS filesystem to be frozen
from new modifications. When this is selected, all ongoing
transactions in the filesystem are allowed to complete, new write
system calls are halted, other calls which modify the filesystem
are halted, and all dirty data, metadata, and log information are
written to disk. Any process attempting to write to the frozen
filesystem will block waiting for the filesystem to be unfrozen.
Note that even after freezing, the on-disk filesystem can contain
information on files that are still in the process of unlinking.
These files will not be unlinked until the filesystem is unfrozen
or a clean mount of the snapshot is complete.
The -u flag is used to un-freeze the filesystem and allow
operations to continue. Any filesystem modifications that were
blocked by the freeze are unblocked and allowed to complete.
The -V flag prints the version number and exits.
Unless -V is specified, one of -f or -u must be supplied to
xfs_freeze.
Примечание (Note)
A copy of a frozen XFS filesystem will usually have the same
universally unique identifier (UUID) as the original, and thus
may be prevented from being mounted. The XFS nouuid mount option
can be used to circumvent this issue.
In Linux kernel version 2.6.29, the interface which XFS uses to
freeze and unfreeze was elevated to the VFS, so that this tool
can now be used on many other Linux filesystems.
Смотри также (See also)
xfs(5), lvm(8), mount(8).
