HP Serviceguard Metrocluster with EMC SRDF for Linux B.01.00.00

B Package attributes for Metrocluster with EMC SRDF for
Linux
This appendix lists all Serviceguard package attributes that are modified or added for Metrocluster
with EMC SRDF for Linux. HP recommends that you use the default settings for most of these
variables, so exercise caution when modifying them.
AUTO_NONCURDATA Default: 0
A value of 0 for this variable indicates that when the package is
failing over to Data Center 2, the package will start with non current
data if the replication links are not ready. But if the links are normal
and the two Symmetrix are properly functioning the package
attempts to failover the device group to Data Center 2, followed by
R1/R2 swap. If both of these operations fail, the package fails to
start on Data Center 2. The package continues to start up even if
R1/R2 swap fails, provided the failover succeeds. In this scenario,
the data is not protected remotely. Also swap cannot be done if
CONSISTENCYGROUPS is set to 1.
Verify you have the minimum requirements for R1/R2 Swapping
by referring to the latest version of the Metrocluster release notes.
AUTO_NO_REPLICATION Default: 1
This variable is used to indicate whether a package is allowed to
start when it fails over within the Data Center 1 and replication is
not happening from Data Center1 (R1) to Data Center2 (R2). A
value of 0 for this variable indicates that the package startup attempt
will fail. To allow startup of the package in this situation, the variable
must be set to 1.
CLUSTER_TYPE This parameter defines the clustering environment in which the script
is used. This is set to “metro” if this is a Metrocluster environment
and “continental” if this is a Continentalclusters environment. A type
of “continental” is supported only when the HP Continentalclusters
product is installed.
CONSISTENCYGROUPS Default: 0
This parameter tells Metrocluster whether or not consistency groups
were used in configuring the R1 and R2 volumes on the Symmetrix
frames. A value of 0 is the normal setting if you are not using
consistency groups. A value of 1 indicates that you are using
consistency groups. (Consistency groups are required for M by N
configurations.)
Ensure that you have the minimum requirements for Consistency
Groups by referring the latest Metrocluster release notes.
DEVICE_GROUP This variable contains the name of the Symmetrix device group for
the package on that node. It contains the name of the consistency
group in an M by N configuration.
PATH Has been modified to include the path name of the Symmetrix
SymCLI commands. This must be set to the default location of /opt/
emc/SYMCLI/bin unless you have changed the location.
PKGDIR This variable contains the full path name of the directory where the
Metrocluster SRDF stores internal configuration files.
RDF_MODE Default: sync.
This parameter defines the data replication modes for the device
group. The supported modes are “sync” for synchronous and
44 Package attributes for Metrocluster with EMC SRDF for Linux