Veritas File System 5.0 Administrator's Guide (September 2006)

The following example shows how to assign pattern tables to a file system in a

volume set that contains two volumes from different classes of storage. The

pattern table is contained within the pattern file mypatternfile.

To assign pattern tables to directories

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

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 ]

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

The solution is to assign an allocation policy that allocates user data from the

vol1 volume to vol2 if space runs out.

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

or 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.

Multi-volume file systems

Allocating data

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