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how to sync a cluster with interactive /yes -is it risky?

This is a discussion on how to sync a cluster with interactive /yes -is it risky? within the AIX Operating System forums, part of the Unix Operating Systems category; --> On a two node AIX 5.3 and HACMP 5.3 cluster I see following message when I verify cluster: Please ...


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  #1 (permalink)  
Old 01-05-2008, 10:58 AM
karcanson@hotmail.com
 
Posts: n/a
Default how to sync a cluster with interactive /yes -is it risky?

On a two node AIX 5.3 and HACMP 5.3 cluster I see following message
when I verify cluster:
Please let me know if it is risky to run cl_sync with interactive/Yes
Is there a possibility of wrong VGDAs copied to correct. I hope that
VG stamps those are more current only will be synced to previous. Is
that right?
Last lines of verification output are as follows:

Verifying Cluster Resources...
A corrective action is available for the condition reported below:

WARNING: The HACMP timestamp file for shared volume group: groupdvg is
inconsistent
with the time stamp in the VGDA for the following nodes: groupdb


To correct the above condition, run verification & synchronization with
"Automatically correct errors found during verification?" set to either
'Yes'
or 'Interactive'. The cluster must be down for the corrective action
to run.

Corrective actions can be enabled for Verification and Synchronization
in the HACMP
extended Verification and Synchronization SMIT fastpath "cl_sync".
Alternatively use the Initialization and Standard Configuration ->
Verification and
Synchronization path where corrective actions always executed in
interactive mode.
__________________________________________________ _________________________________


Verifying XD Solutions...


Verification has completed normally.

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  #2 (permalink)  
Old 01-05-2008, 10:58 AM
David Donald Hooton
 
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Default Re: how to sync a cluster with interactive /yes -is it risky?

It is perfectly safe to do "smit cl_sync" with interactive correction
in this instance. The timestamps being talked about are the ones
HACMP keeps internally.

- DDH

karcanson@hotmail.com wrote:
> On a two node AIX 5.3 and HACMP 5.3 cluster I see following message
> when I verify cluster:
> Please let me know if it is risky to run cl_sync with interactive/Yes
> Is there a possibility of wrong VGDAs copied to correct. I hope that
> VG stamps those are more current only will be synced to previous. Is
> that right?
> Last lines of verification output are as follows:


> Verifying Cluster Resources...
> A corrective action is available for the condition reported below:


> WARNING: The HACMP timestamp file for shared volume group: groupdvg is
> inconsistent
> with the time stamp in the VGDA for the following nodes: groupdb



> To correct the above condition, run verification & synchronization with
> "Automatically correct errors found during verification?" set to either
> 'Yes'
> or 'Interactive'. The cluster must be down for the corrective action


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  #3 (permalink)  
Old 01-05-2008, 10:58 AM
Andreas Schulze
 
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Default Re: how to sync a cluster with interactive /yes -is it risky?

karcanson@hotmail.com schrieb:

> On a two node AIX 5.3 and HACMP 5.3 cluster I see following message
>[...]
> Verifying Cluster Resources...
> A corrective action is available for the condition reported below:
>[...]
> To correct the above condition, run verification & synchronization with
> "Automatically correct errors found during verification?" set to either
> 'Yes'
> or 'Interactive'. The cluster must be down for the corrective action
> to run.
> [...]


IMHO HACMP 5.3 is a quite good HACMP release and in my experience
whenever CSPOC says that "A corrective action is available..." this
works well. So don't hesitate to use it. Usually real cluster problems
begin when there is no automatic corrective action available or
whenever you don't get a meaningful error message ;-)

regards,
andreas

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  #4 (permalink)  
Old 01-05-2008, 11:02 AM
karcanson@hotmail.com
 
Posts: n/a
Default Re: how to sync a cluster with interactive /yes -is it risky?


Andreas and David
Thanks a lot...

But This is only happening after HACMP 5.1 to 5.3 upgrade.
and happens with only after running varyonvg -b -u and importvg -L
commands this was not the case with hacmp 5.1
Another thing is :
I will have to wait till next down time to sync this as This could be
done only after cluster services are brought down on both nodes, Isn't
it?

Thanks again for all the help

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