6.5 HP StoreAll OS CLI Reference Guide

ibrix_migrator
Defines migration rules and controls migrator operations.
Description
Tiering enables automatic migration of files from one tier to another within the same file system.
User-written rules based on file attributes (such as modification time, access time, file size, or file
type) define the migration policy, determining which files are moved and when. Tiers are defined
on segments, not individual files. Use ibrix_tier to assign segments to tiers. You can then use
ibrix_migrator to define the tiering policy for the file system.
When configuring the tiering policy, note the following:
• The tiering policy (a set of rules) applies to individual files contained in a specific file system.
• If a file meets the criteria of a rule, it will be moved from its current tier to the rule’s target tier.
• Once configured, tiering policy is executed via command or as a cron job, and is performed
in the background.
• Recently touched files (files that have been created or changed within the past five minutes)
are considered active and will not be moved.
Migrator command restrictions
When migration rules are defined, tiering operations can be started and stopped with the
ibrix_migrator command. Only one tiering operation can be running on a file system. Tiering
operations are treated as run-to-completion tasks that are not restarted on failure and cannot be
paused and later resumed. However, tiering can be started if a server is in the In-Failover state.
ibrix_migrator cannot be run at the same time as ibrix_rebalance.
Synopsis
Create a rule defining data migration from a source tier to a destination tier:
ibrix_migrator -A -f FSNAME -r RULE -S SOURCE_TIER -D DESTINATION_TIER
The rule is written to the configuration database.
Delete rules from the configuration database for the specified file system:
ibrix_migrator -d -f FSNAME -r RULELIST
Use the -f option to limit the command to a specific file system.
List information about active migrator tasks:
ibrix_migrator -i [-f FSNAME]
Use the -f option to limit the command to a specific file system.
List information about migrations:
ibrix_migrator -l [-f FSNAME] [-r]
The -r option lists rule information.
Start a migration operation on the specified file system:
ibrix_migrator -s -f FSNAME [-v]
Stop the specified migration operation:
ibrix_migrator -k -t TASKID [-F force]
ibrix_migrator 139