Building Disaster Recovery Serviceguard Solutions Using Metrocluster with EMC SRDF

automatically start the package under these conditions, set
AUTOR2RWNL=0
AUTOR2XXNL Default: 0
A value of 0 for this variable indicates that when the package is started
on an R2 host and at least one (but not all) SRDF link is down, the
package is automatically started. This is usually the case when the
‘Partitioned+Suspended’ RDF Pairstate exists. We cannot verify the
state of all Symmetrix volumes on the R1 side to validate conditions,
but the Symmetrix on the R2 side must be in a ‘normal’ state. To require
operator intervention before starting the package under these
conditions, set AUTOR2XXNL=1.
AUTOSWAPR2 Default: 0
A value of 0 for this variable indicates that when the package is failing
over to Data Center 2, it will not perform R1/R2 swap. To perform an
R1/R2 swap, set AUTOSWAPR2=1/AUTOSWAPR2=2. This allows an
automatic R1/R2 swap to occur provided the SRDF link and the two
Symmetrix are properly functioning. When AUTOSWAPR2 is set to 1,
the package attempts to failover the device group to Data Center 2,
followed by R1/R2 swap. If either of these operations fail, the package
fails to start on Data Center 2. When AUTOSWAPR2is set to 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.
AUTOSWAPR2 cannot be set to 1 or 2 if CONSISTENCYGROUPS is set
to 1.
Verify you have the minimum requirements for R1/R2 Swapping by
referring whether the latest version of the Metrocluster release notes.
AUTOSPLITR1 Default: 0
This variable is used to indicate whether a package is allowed to start
when it fails over from an R1 host to another R1 host when the device
group is in the split state. 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.)
If CONSISTENCYGROUPS is set to 1, AUTOSWAPR2 cannot be set to
1. 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 /usr/symapi/
bin unless you have changed the location.
88 Package attributes for Metrocluster with EMC SRDF