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тАО06-20-2010 05:31 PM
тАО06-20-2010 05:31 PM
Help on cluster hang
Any Idea
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тАО06-20-2010 06:10 PM
тАО06-20-2010 06:10 PM
Re: Help on cluster hang
Do you use something like AMDS ?
You can from the console prompt boot min and adjust quorum using sysgen parameters.
If think you may need to revise your cluster config.
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тАО06-20-2010 07:39 PM
тАО06-20-2010 07:39 PM
Re: Help on cluster hang
>> i have a cluster of two node ES47 with fiber interconnect.
Your configuration seems to have only two nodes in the cluster and there is no
quorum disk.
Looks like in your case, as one node is down, the cluster does not have
quorum to continue and hence other cluster node is in a Hang state.
In such case, only once the cluster quorum is met, the other node gets out
of the hang state
Example:
Node A - Votes=1
Node B - Votes=1
In this case Quorum = 2.
* when both Node A & Node B is up, Votes = 1 + 1 = 2. Quorum (=2) is met.
* If node A goes down (for whatever reason).
Only Node B is up, its votes=1. Since Quorum is 2, Node B will now be in a
Hang state as the Quorum is not met.
>> The boot hang just after the message: %SYSINIT-I- waiting to form or join an
>> OpenVMS Cluster
You need to give more information about you cluster, such as
what is the value of
VOTES ?
EXPECTED_VOTES ?
Based on this the Quorum of the cluster would get decided.
The most likely cause of the Node in hang state looks like because the cluster
quorum is not met. However you need to give the values of the above
parameters in order for us to confirm it.
For more details about OpenVMS Cluster configuration, refer -
http://labs.hoffmanlabs.com/node/153
Hope this helps.
Regards,
Murali
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тАО06-20-2010 08:04 PM
тАО06-20-2010 08:04 PM
Re: Help on cluster hang
To get the cluster wide details, you need to provide the values of CL_VOTES,
CL_EXP and CL_QUORUM parameters.
Command -
$SHOW CLUSTER/CONT
Command > add CL_VOTES,CL_EXP,CL_QUORUM
Provide the output of the above command.
Regards,
Murali
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тАО06-20-2010 08:26 PM
тАО06-20-2010 08:26 PM
Re: Help on cluster hang
However if you've already gotten the cluster back into full operation we can't reach into the ozone and find out the cause of what hung your DS25. There could be a hardware configuration conflict between the DS25 and ES47 that caused the hang. The only way to identify that would be the verbose boot and that still might not be totally clear.
bob
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тАО06-20-2010 08:49 PM
тАО06-20-2010 08:49 PM
Re: Help on cluster hang
A number of things can be the cause for this problem.
The system parameters, VOTES, EXPECTED_VOTES, DISK_QUORUM etc. To form a VMS cluster, you need to adjust VOTES and EXPECTED_VOTES. These two define whether a system will actually boot
or wait until sufficient quorum is available.
Below is the link where similar problem was discussed earlier.
http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1277094513523+28353475&threadId=1282524
Refer below link for some other details.
http://www.itec.suny.edu/scsys/vms/vmsdoc/72final/6534/6534pro_009.html
Regards,
Ketan
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тАО06-20-2010 10:51 PM
тАО06-20-2010 10:51 PM
Re: Help on cluster hang
b -fl 0,20000
This will add a lot of debugging, and then, post the last lines displayed here.
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тАО06-21-2010 05:44 AM
тАО06-21-2010 05:44 AM
Re: Help on cluster hang
What do you mean when you say you have a "Fiber Interconnect" ?
There is no FC interconnect that I am aware of. I assume that it is ethernet over Fibre. Is the interconnect Point-to-Point? I guess the question really is whether the DS25 can talk to the ES47. (Layer 2 comms ??)
Dave
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тАО06-21-2010 06:39 AM
тАО06-21-2010 06:39 AM
Re: Help on cluster hang
b -fl 5,20000
If you have enabled the log of the startup, see if you have a file in sys$sysdevice:[SYS5.sysexe]startup.log
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тАО06-21-2010 11:13 PM
тАО06-21-2010 11:13 PM
Re: Help on cluster hang
You can test this by the following:
- put a crossover network cable between the ES47 and the DS25;
- login to the surviving ES47 (assuming it's booted and running) and type in SHOW LOGICAL SYS$SYSROOT
If SYS$SYSROOT ends in SYS0. then you'll need to boot the DS25 off a different root (e.g. SYS1) or the lock manager will step in during boot and prevent the second system from booting.
Steve