Veritas File System 5.1 SP1 Administrator"s Guide (5900-1499, April 2011)

Using the fsvmap command

Report the extents of files on multiple volumes:

# fsvmap /dev/vx/rdsk/fstest/testvset vol1 vol2

vol1 /.

vol1 /ns2

vol1 /ns3

vol1 /file1

vol2 /file1

vol2 /file2

Report the extents of files that have either data or metadata on a single volume

in all Storage Checkpoints, and indicate if the volume has file system metadata:

# fsvmap -mvC /dev/vx/rdsk/fstest/testvset vol1

Meta Structural vol1 //volume has filesystem metadata//

Data UNNAMED vol1 /.

Data UNNAMED vol1 /ns2

Data UNNAMED vol1 /ns3

Data UNNAMED vol1 /file1

Meta UNNAMED vol1 /file1

Load balancing

An allocation policy with the balance allocation order can be defined and assigned

to files that must have their allocations distributed at random between a set of

specified volumes. Each extent associated with these files are limited to a maximum

size that is defined as the required chunk size in the allocation policy. The

distribution of the extents is mostly equal if none of the volumes are full or

disabled.

Load balancing allocation policies can be assigned to individual files or for all files

in the file system. Although intended for balancing data extents across volumes,

a load balancing policy can be assigned as a metadata policy if desired, without

any restrictions.

101Multi-volume file systems

Load balancing