Veritas™ File System 5.0.1 Administrator's Guide

Define three allocation policies, v1, bal_34, and rr_all, that allocate from

the volumes using different methods:

# fsapadm define /mnt1 v1 vol1

# fsapadm define -o balance -c 64k /mnt1 bal_34 vol3 vol4

# fsapadm define -o round-robin /mnt1 rr_all vol1 vol2 vol3 vol4

# fsapadm list /mnt1

name order flags chunk num comps

rr_all round-robin 0 0 4 vol1, vol2, vol3, vol4

bal_34 balance 0 64.000KB 2 vol3, vol4

v1 as-given 0 0 1 vol1

These policies allocate from the volumes as follows:

Allocations are restricted to vol1.v1

Balanced allocations between vol3 and vol4.bal_34

Round-robin allocations from all four volumes.rr_all

Assign the policies to various objects in the file system. The data policy must

be specified before the metadata policy:

# fsapadm assignfile -f inherit /mnt1/appdir bal_34 v1

# fsapadm assignfs /mnt1 rr_all ''

These assignments will cause allocations for any files below /mnt1/appdir

to use bal_34 for data, and v1 for metadata. Allocations for other files in the

file system will default to the file system-wide policies given in assignfs,

with data allocations from rr_all, and metadata allocations using the default

policy as indicated by the empty string (''). The default policy is as-given

allocations from all metadata-eligible volumes.

Querying allocation policies

Querying an allocation policy displays the definition of the allocation policy.

The following example shows how to query allocation policies. The example volume

set contains two volumes from different classes of storage.

To query allocation policies

◆

Query the allocation policy:

# fsapadm query /mnt1 bal_34

131Multi-volume file systems

Querying allocation policies