HP Serviceguard Metrocluster with EMC SRDF for Linux B.01.00.00

Table 5 Package startup behavior in various failure scenarios (continued)
Metrocluster
behaviourAUTO parameters
SRDF
StatesFailover/Failback
SRDF links
are split.
the package, create
a FORCEFLAG in
the package
directory and restart
the package. To
automate failover,
set
AUTO_NO_REPLICATION
to 1.
By default, the
package fails to
AUTO_NONCURDATAPartitioned+SuspendedWDMIXED_STATEsync or
async
Failover to the
recovery site
start in this(R2) when the
condition. To startSRDF Links
the package, createare in mixed
a FORCEFLAG instate. ( This
the packagecan happen
directory and restartwith
the package. Toconsistency
automate failover,groups where
setone link is in
AUTO_NONCURDATA
to 1.
Partitioned
state and the
other is in
Suspended
state).
Package Failover using SRDF/Asynchronous
The EMC Solutions Enabler provides a control operation checkpoint to confirm that the data written
in the current SRDF/Asynchronous cycle has been successfully committed to the R2 side. When a
package fails over to secondary site, Metrocluster with EMC SRDF for Linux ensures the most current
data when the SRDF link is still up. Metrocluster with EMC SRDF for Linux invokes the action
checkpoint prior to failover to the storage. Since the checkpoint operation prolongs the failover
time for a package to start, the duration for a package to start on R2 side is longer. The time taken
to complete the checkpoint operation depends on the cycle time configured which determines the
amount of data outstanding on the R1 site.
Package Failover using SRDF/Asynchronous 33