5.5 HP StorageWorks X9720 Network Storage System Administrator Guide (AW549-96026, March 2011)

See the ibrix_lwhost command description in the HP StorageWorks X9000 File Serving Software
CLI Reference Guide for other available options.
Windows clients. Click the Tune Host tab on the Windows X9000 client GUI. Tunable parameters
include the NIC to prefer (the default is the cluster interface), the communications protocol (UDP or
TCP), and the number of server threads to use. See the online help for the client if necessary.
Migrating segments
To improve cluster performance, segment ownership can be transferred from one host to another
through segment migration. Segment migration transfers segment ownership but it does not move
segments from their physical locations in networked storage systems. Segment ownership is recorded
on the physical segment itself, and the ownership data is part of the metadata that the management
console distributes to file serving nodes and X9000 clients so that they can locate segments.
Migrating specific segments
Use the following command to migrate ownership of the segments in LVLIST on file system FSNAME
to a new host and update the source host:
<installdirectory>/bin/ibrix_fs -m -f FSNAME -s LVLIST -h HOSTNAME [-M] [-F] [-N]
To force the migration, include -M. To skip the source host update during the migration, include -F.
To skip host health checks, include -N.
The following command migrates ownership of ilv2 and ilv3 in file system ifs1 to s1.hp.com:
<installdirectory>/bin/ibrix_fs -m -f ifs1 -s ilv2,ilv3 -h s1.hp.com
Migrating all segments from one host to another
Use the following command to migrate ownership of the segments in file system FSNAME that are
owned by HOSTNAME1 to HOSTNAME2 and update the source host:
<installdirectory>/bin/ibrix_fs -m -f FSNAME -H HOSTNAME1,HOSTNAME2 [-M] [-F] [-N]
For example, to migrate ownership of all segments in file system ifs1 that reside on s1.hp.com to
s2.hp.com:
<installdirectory>/bin/ibrix_fs -m -f ifs1 -H s1.hp.com,s2.hp.com
Removing storage from the cluster
Before removing storage that is used for an X9000 Software file system, you will need to evacuate
the segments (or logical volumes) storing file system data. This procedure moves the data to other
segments in the file system and is transparent to users or applications accessing the file system. When
evacuating a segment, you should be aware of the following restrictions:
• Segment evacuation uses the file system rebalance operation. While the rebalance task is running,
the system will prevents tasks from running on the same file system. Similarly, if another task is
running on the file system, the rebalance task cannot be scheduled until the first task is complete.
• You cannot evacuate or remove the root segment (segment #1).
• The file system must be quiescent (no active I/O while a segment is being evacuated). Running
this utility while the file system is active may result in data inconsistency or loss.
• If quotas are enabled on the affected file system, the quotas must be disabled during the rebalance
operation.
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