VERITAS File System 4.1 Administrator's Guide

Multi-Volume File Systems

Allocation Policies

Chapter 9146

0 51200 1250 49950 vol1

1 51200 16 51184 vol2

The assignment of policies on a ﬁle system-wide basis ensures that any metadata allocated is

stored on the device with the policy metadatapolicy (vol2) and all the user data is stored on

vol1 with the associated datapolicy policy.

The effects of creating a number of ﬁles is shown in the following script:

i=1

while [ $i -lt 1000 ]

dd if=/dev/zero of=/mnt1/$i bs=65536 count=1

i=’expr $i + 1’

done

Before the script completes, it runs out of space even though space is still available on the

vol2 volume:

# fsvoladm list /mnt1

devid size used avail name

0 51200 51200 0 vol1

1 51200 221 50979 vol2

To allocate user data from the vol1 volume and then use vol2 if space runs out, assign the

allocation policy as follows:

# fsapadm define /mnt1 datapolicy vol1 vol2

You must have system administrator privileges to create, remove, or change policies, and set

ﬁle system or Storage Checkpoint level policies. Users can assign a pre-existing policy to their

ﬁles if the policy allows. Policies can be inherited for new ﬁles.