Thin Reclamation of a file system

Article:HOWTO59591  |  Created: 2011-10-12  |  Updated: 2011-10-12  |  Article URL http://www.symantec.com/docs/HOWTO59591
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Thin Reclamation of a file system

Veritas File System (VxFS) supports reclamation of free storage on a Thin Storage LUN. Free storage is reclaimed using the fsadm command or the vxfs_ts_reclaim API. You can perform the default reclamation or aggressive reclamation. If you used a file system for a long time and must perform reclamation on the file system, Symantec recommends that you run aggressive reclamation. Aggressive reclamation compacts the allocated blocks, which creates larger free blocks that can potentially be reclaimed.

See the fsadm_vxfs(1M) and vxfs_ts_reclaim(3) manual pages.

Thin Reclamation is only supported on file systems mounted on a VxVM volume.

On AIX, Linux, and Solaris:

The following example performs aggressive reclamation of free storage to the Thin Storage LUN on a VxFS file system mounted at /mnt1:

# /opt/VRTS/bin/fsadm -R /mnt1

On HP-UX:

The following example performs reclamation of free storage to the Thin Storage LUN on a VxFS file system mounted at /mnt1:

# fsadm -R /mnt1

Veritas File System also supports reclamation of a portion of the file system using the vxfs_ts_reclaim() API.

Note:

Thin Reclamation is a slow process and may take several hours to complete, depending on the file system size. Thin Reclamation is not guaranteed to reclaim 100% of the free space.

You can track the progress of the Thin Reclamation process by using the vxtask list command when using the Veritas Volume Manager (VxVM) command vxdisk reclaim.

See the vxtask(1M) and vxdisk(1M) manual pages.

You can administer Thin Reclamation using VxVM commands.

See Reclamation of storage on thin reclamation arrays


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Article URL http://www.symantec.com/docs/HOWTO59591


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