Veritas™ File System 5.0.1 Administrator's Guide

To assign pattern tables to directories
1
Define two allocation policies called mydata and mymeta to refer to the vol1
and vol2 volumes:
# fsapadm define /mnt1 mydata vol1
# fsapadm define /mnt1 mymeta vol2
2
Assign the pattern table:
# fsapadm assignfspat -F mypatternfile /mnt1
Allocating data
The following script creates a large number of files to demonstrate the benefit of
allocating data:
i=1
while [ $i -lt 1000 ]
do
dd if=/dev/zero of=/mnt1/$i bs=65536 count=1
i=‘expr $i + 1‘
done
Before the script completes, vol1 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
One possible solution is to define and assign an allocation policy that allocates
user data to the least full volume.
You must have system administrator privileges to create, remove, or change
policies, or to set file system or Storage Checkpoint level policies. Users can assign
a pre-existing policy to their files if the policy allows that.
Policies can be inherited for new files. A file will inherit the allocation policy of
the directory in which it resides if you run the fsapadm assignfile -f inherit
command on the directory.
The following example defines an allocation policy that allocates data to the least
full volume.
133Multi-volume file systems
Allocating data