CMCLD Doubt.

[santosh jha]

Dear All,
Please have a look at my Doubt
Node A is Primary
Node B is Secondary
Autostart_cmcld=1
Because of some problem package shifted to Node B.Node B is up and running and the package is running on B.Now if I restart Node A
what will happen to the package ,will it shift to Node A or will it remain on NOde B.

Please Help.

Regards
Santosh Jha

[Hoefnix · Accepted solution]

It depends if you have the package set on Failback_policy on MANUAL or AUTOMATIC.

See the package *.cfg file to check it.

Regards,

Peter

[Hoefnix]

Explain is in the cfg file:
# Enter the failback policy for this package. This policy will be used
# to determine what action to take when a package is not running on
# its primary node and its primary node is capable of running the
# package. The default policy unless otherwise specified is MANUAL.
# The MANUAL policy means no attempt will be made to move the package
# back to its primary node when it is running on an adoptive node.
#
# The alternative policy is AUTOMATIC. This policy will attempt to
# move the package back to its primary node whenever the primary node
# is capable of running the package.

Regards,

Peter

[Jakes Louw]

Be careful of AUTO failback: if a node crashes and the problem is not readily identified, you could be in a situation where:

NodeA crashes, pkg starts on NodeB
NodeA back up, pkg switches back
2 minutes later,
NodeA crashes, pkf starts on NodeB
NodeA back up,.........

And so on. This could in effect make a
customer highly irate.

[santosh jha]

Failback in the package control file is set to MANUAL.

Regards
Santosh

[PVR]

Since the package failover policy is set as manual, Package will not failback to Node A automatically. You need to move the package manually.

Normally, we keep Autostart_cmcld=0, since system can restart due to some hardware problems and it will try to join the cluster, can create more problems.

[santosh jha]

Dear PVR ,
Please clarify If we keep Autostart_cmcld=1
and it tries to join the cluster, then what problem it can create.

Note that Failback is also Manual.

Regards
Santosh