HP 3PAR StoreServ Cluster Extension Software Administrator Guide

For detailed procedures, see the HP 3PAR InForm Management Console User Guide or the HP
3PAR InForm CLI Administrator’s Manual.
Installing HP 3PAR Command Line Interface (CLI)
HP 3PAR StoreServ Cluster Extension communicates with the HP 3PAR StoreServ Storage using the
HP 3PAR Command Line Interface (CLI). Ensure that you install the supported version of HP 3PAR
Command Line Interface (CLI) on a host where clx3PARrun can be used.
Creating and configuring the user configuration file
The CLI expects as an argument the name configured as the APPLICATION tag value.
The following is an example of a customized user configuration file when using clx3PARrun:
COMMON
#LogLevel error # error|info default: error (optional)
#HP3PARCLICommandTimeout 60
#HP3PARRCPeriodicLinkDownTimeout 250
#HP3PARCLIRetryCount 3 # Specifies the number of times that a HP 3PAR
StoreServ CLI command is retried on getting "Too many CLI connection" error
# The APPLICATION part defines failover information for the application specified
# as value of the APPLICATION tag. For example, the command - clx3PARrun OracleCLX -
# will use the below settings to check and allow access to the disk set specified
# as volume Group oracle.
# Necessary object when clx3PARrun is used are:
# APPLICATION, DC_A_InServStorage_SerNum, DC_B_InServStorage_SerNum,
#RCVolumeGroupA, RCVolumeGroupB, DC_A_Hosts and DC_B_Hosts
APPLICATION oracle # package/service/cluster group test_application
DC_A_InServStorage_SerNum 1302871 # 1302871 is the data center A HP 3PAR
array serial number
#DC_B_InServStorage_SerNum 1302835 # 1302835 is the data center B HP 3PAR
array serial number
#RCVolumeGroupA CLX_VG # CLX_VG is the data center A HP
3PAR Remote Copy volume group name
#RCVolumeGroupB CLX_VG.r2835 # CLX_VG.r2835 is the data
center B HP 3PAR Remote Copy volume group name
#DC_A_Hosts clx_node1 clx_node2 # clx_node1, clx_node2 are data center A cluster
nodes
#DC_B_Hosts clx_node3 clx_node4 # clx_node3, clx_node4 are data center B cluster
nodes
#ApplicationStartup resyncwait # values: fastfailback | resyncwait, Comment :
Setting the fastfailback property will behave as resyncwait property when
clx3parrun is used
#UseNonCurrentDataOk yes # values: yes | no #Default value is yes which causes the
failover operation to succeed at the destination site when the data at the
destination site might not be current. On setting the value to No the resource
will not come online at the destination site since the data might not be current.
#Type3DCConfiguration Yes # Reserved but mandatory property.
Timing considerations
HP 3PAR StoreServ Cluster Extension gives priority to storage system operations over cluster software
operations. If HP 3PAR StoreServ Cluster Extension is invoked at the point when virtual volumes of
Remote Copy volume group are in resynchronization or full synchronization operation or is gathering
information about the remote storage system, it waits until the requested status information is
reported. This ensures the priority of data integrity over cluster software failover behavior. Because
the failover timing depends on the configuration of your Remote Copy environment, load on the
HP 3PAR StoreServ Storage and the settings in the UCF.cfg file, you must evaluate the following
considerations:
• HP 3PAR StoreServ Cluster Extension uses HP 3PAR Command Line Interface (CLI) to
communicate with the HP 3PAR StoreServ Storage, depending on the settings of HP 3PAR
command timeout property, and the number of Remote Copy volume groups managed by HP
3PAR StoreServ Storage, the online operation could time out. This can also happen if
68 CLI commands and utilities