Designing Disaster Recovery Clusters using Metroclusters and Continentalclusters, Reprinted October 2011 (5900-1881)

data on the R2 side may be non-current and thus a risk that data loss
will occur when starting the package up on the R2 side. To have
automatic package startup under these conditions, set
AUTOR2RWNL=0
AUTOR2XXNL Default: 0
A value of 0 for this variable indicates that when the package is being
started on an R2 host and at least one (but not all) SRDF links are
down, the package will be automatically started. This will normally be
the case when the ‘Partitioned+Suspended’ RDF Pairstate exists. We
cannot check the state of all Symmetrix volumes on the R1 side to
validate conditions, but the Symmetrix on the R2 side should 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 only when the SRDF link and the two
Symmetrix are properly functioning. When AUTOSWAPR2 is set to 1,
the package will attempt to failover the device group to Data Center
2, followed by R1/R2 swap. If either of these operations fails, the
package will fail to start on Data Center 2. When AUTOSWAPR2is set
to 2, the package will continue to start up even if R1/R2 swap fails,
provided the failover succeeds. In this scenario, the data will not be
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 to most up-to-date version of the Metrocluster release notes.
AUTO_SPLITR1 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 should be set to a value of 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 to Metrocluster release notes.
DEVICE_GROUP This variable contains the name of the Symmetrix device group for the
package on that node, which contains the name of the consistency
group in an M by N configuration.
492 Environment File Variables for Metrocluster with EMC SRDF