6.1 HP IBRIX X9000 Network Storage System File System User Guide (TA768-96061, June 2012)

Defining the primary tier
All new files are written to the primary tier, which is typically the tier built on the fastest storage.
Use the following command to define the primary tier:
ibrix_fs_tune -f FILESYSTEM -h SERVERS -t TIERNAME
The following example specifies Tier1 as the primary tier:
ibrix_fs_tune -f ifs1 -h ibrix1a,ibrix1b -t Tier1
This policy takes precedence over any other file allocation polices defined for the filesystem.
NOTE: This example assumes users access the files over CIFS, NFS, FTP, or HTTP. If X9000
clients are used, the allocation policy must be applied to the clients. (Use -h to specify the clients.)
Creating a tiering policy for a file system
A tiering policy specifies migration rules for the file system. One tiering policy can be defined per
file system and the policy must have at least one rule. Rules in the policy can migrate files between
any two tiers in the filesystem. For example, rule1 could move files between Tier1 and Tier2, rule2
could migrate files from Tier2 to Tier1, and rule3 could migrate files between Tier1 and Tier3.
A file is migrated according to the first rule that it matches. You can narrow the scope of rules by
combining directives using logical operators.
The following example creates a policy that has three simple rules:
• Migrate all files that have not been modified for 30 minutes from Tier1 to Tier2. (This rule is
not valid for production, but is a good rule for testing.)
• Migrate all files larger than 5 MB from Tier1 to Tier2.
• Migrate all mpeg4 files from Tier1 to Tier 2.
On the GUI, select Filesystems from the Navigator and then select a file system in the Filesystems
panel. In the lower Navigator, select Active Tasks > Data Tiering > Rules.
Creating a tiering policy for a file system 183