Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access EVA P6000 for Linux B.12.00.00

Table 6 Replication Modes and Failover Scenarios (continued)
ResolutionDT_APPLICATION_STARTUP_POLICYReplication
Mode
Failover
Scenario
Vdisk is restored.
HP recommends
to take a
snapshot/snapclone
of the destination
Vdisks before the
copy starts so that
there is consistent
copy available
for recovery.
Resume the link,
and then start up
the package
DR Group does not fail over and the package does not start. The
behavior is not affected by the presence of the FORCEFLAG file.
The following log message appears in the package log :
SynchronousRemote failover
when the link is
manually
suspended
Error - The replication link is in suspend mode. The DR group
cannot be failed over.
To forcefully start
up the package,
DR Group does not fail over and
the package does not start.
DR Group fails over and the
package is started.
Enhanced
Asynchronous
create a
The following log message
appears in the package log :
FORCEFLAG file
in the package
The replication link of this DR
group is in suspend mode.
directory, and
then restart the
package.
The replication link state is good
and the role of the device group
on this site is "destination".
Because the state of the data
may not be current and the
package startup policy is
DATA_CURRENCY_PREFERRED,
the package is NOT allowed to
start up.
N/ASynchronousRemote failover
when DR Group
To forcefully start
up the package,
If the Merge operation
completes before WAIT_TIME
Waits until the WAIT_TIME for
the Merge operation is
complete. The package starts
Enhanced
Asynchronous
is in
RUNDOWN
state and the
link is up
create a
“FORCEFLAG”
file in package
expires, the package is started.
Otherwise, the package startup
fails.
even if merge is not complete
within this time.
directory and
The following log message
appears in the package log :
restart the
package.
The replication link state is
good, the role of the device
Package does not
wait for the
group on this site is destination"
merge to
and the data Log Copy is in
complete. It starts
up immediately.
progress. Because the
WAIT_TIME is set to <xx>
minutes, the program will wait
for completion of the log copy.
….
The DR Group is in merging
state.
….
The WAIT_TIME has expired.
Error - Failed to failover and
swap the role of the device
30 Understanding failover/failback scenarios