Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access EVA A.05.01

Table 7 Replication Modes and Failover Scenarios (continued)
ResolutionDT_APPLICATION_STARTUP_POLICYReplication
Mode
Failover
Scenario
The following log message
appears in the package
log:
complete. It starts up
immediately.
The replication link state is
good, the role of the device
group on this site is
destination" and the data
Log Copy is in 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 group. The
package is NOT allowed
to start up.
Restart the package
when the full copy is
completed.
If full copy operation is complete before WAIT_TIME expires,
DR Group fails over and the package is started. Otherwise,
the DR Group does not failover and the package is not
Synchronous
or Enhanced
Asynchronous
Remote failover
during copying
started. The behavior is not affected by the presence of the
FORCEFLAG file.
The following log message appears in the package log :
The replication link state is good, the role of the device
group on this site is "destination" and the data Track Copy
is in progress. Because the WAIT_TIME is set to xx minutes,
the program will wait for completion of the track copy.
....
The WAIT_TIME has expired. Error - Failed to failover and
swap the role of the device group. The package is NOT
allowed to start up.
To forcefully start up
the package even
DR Group does not fail
over and the package does
not start.
DR Group fails over and the
package is started.
Synchronous
or Enhanced
Asynchronous
Remote failover
when CA link
down and when though data currency
The following log message
appears in the package log
:
merge was in
progress
cannot be determined,
create a
“FORCEFLAG” file in
package directory,
Warning - Unable to get
remote DR group state
and then restart the
package.
because the CA link is
down.
…..
The role of the device
group on this site is
"destination". The state of
the replication link is down
and the state of data may
not be current. Because the
package startup policy is
DATA_CURRENCY_PREFERRED,
54 Understanding failover/failback scenarios