HP 3PAR X9000 File Serving Software (IBRIX) Implementation Guide (QL226-96987, June 2013)

Coping with Cluster Node Failure
• When an StoreAll 9300 cluster node fails, the I/O is moved over to the standby network on
the surviving cluster node based on the configuration defined. Refer to the StoreAll Storage
File System User Guide for more details.
• The StoreAll 9300 does not failback automatically when the cluster node comes back online.
Instead you must trigger the volume to failover from the backup node to the primary node.
Use the ibrix_server command from management console to trigger the failback.
• The following are important configuration files and their locations:
All system errors such as SCSI, multipath, and NIC messages are reported for cluster
nodes in /var/log/messages.
◦
◦ On each StoreAll 9300 cluster node, the /etc/ibrix/iadconf.xml file contains the
configuration data and configuration parameter values. The/usr/local/ibrix/log/
Iad.log contains activity from the management server. The XML file is updated for any
configuration changes.
◦ The configuration XML data for all nodes and clients are stored at following location on
the cluster nodes: /usr/local/ibrix/.db/engine.
◦ On the management console, the fusion manager log is located at /usr/local/ibrix/
log/fusionserver.log.
◦ On HP 3PAR systems, use the HP 3PAR OS CLI command showeventlog -debug
-oneline <options> to obtain the event log for debugging any issues, or a system
InSplore generated from Customer Support through the service processor.
Creating Software Snapshots
You can use one of two methods to take snapshots on a file system: the software method or the
block method. Using both snapshot methods simultaneously on the same file system is not supported.
Snapshots are read-only and cannot be modified, moved, or renamed. However, they can be
copied. Before taking software snapshots of a file system or directory, enable the directory tree
for snapshots which is called a snap tree.
This section explains how to create software snapshots through the StoreAll OS CLI.
1. Create a mounted file system using the LUNs that are exported from the HP 3PAR StoreServ
Storage. See “Mounting a File System” (page 28).
2. Enable the directory tree for the snapshots using the following command:
# ibrix_snap -m [-U] -f FSNAME -P SNAPTREEPATH
For example, to enable the directory tree for file system fs1 with snap tree path /fs1/dir1,
use the following command:
# ibrix_snap -m [-U] -f fs1 -P /fs1/dir1
3. To take an on-demand snapshot from the StoreAll OS CLI, use the following command:
# ibrix_snap -c -f FSNAME -P SNAPTREEPATH -n NAMEPATTERN
HP StoreAll OS Software Usage 35