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тАО02-25-2008 09:31 AM
тАО02-25-2008 09:31 AM
New Installation Red Hat
What we have is a four node cluster, Oracle RAC.
What we see is periodice reboots of each node. These reboots occur at the same time on each node but on different days, at different times of the day.
The log files are not helpful in determining the issue. On Friday and Saturday night we saw reboots at 21:16 and 20:10 respectively. One would think this is a result of "something" cron'd, but I do not see any related cron entries for these times.
Our DBA group has opened an issue with Oracle, but I'm hoping someone out there has encountered this and can point me in the right direction.
Regards,
-dl
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тАО02-25-2008 10:06 AM
тАО02-25-2008 10:06 AM
Re: New Installation Red Hat
I don't understand this part correctly. But node reboots on Oracle RAC can be caused by Oracle OCR. You should find messages like "Rebooting for cluster integrity".
This may be an Oracle BUG, can be a problem with your nodes interconnects, timeout setting or access to the shared ocr/voting disk.
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тАО02-25-2008 10:13 AM
тАО02-25-2008 10:13 AM
Re: New Installation Red Hat
As for the reboots times - All four nodes seem to reboot at the same random time on any given day.
Thanks for any insight you may share.
-dl
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тАО02-25-2008 11:19 AM
тАО02-25-2008 11:19 AM
Re: New Installation Red Hat
-dl
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тАО02-25-2008 06:40 PM
тАО02-25-2008 06:40 PM
Re: New Installation Red Hat
Are you able to see the system statistics(like MEM/swap/CPU/load avaerag etc) around the problem window? was it stable earlier? or it is a brand new setup?
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тАО02-26-2008 04:21 AM
тАО02-26-2008 04:21 AM
Re: New Installation Red Hat
Also - have you looked at the logs on the EVA?
Given the apparent "time based" reboots - are there other processes that access the cluster at those times? There may be an external trigger....
Good luck -
DV
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тАО02-26-2008 09:38 AM
тАО02-26-2008 09:38 AM
Re: New Installation Red Hat
We've packaged all of the log files including Oracle Cluster logs, and it appears we've stumped the folks at Metalink as well.. Last I had heard, they were looking at the OCFS and RAW device files for clues.
I'd come across some articles about log file rotation and syslog.d issues in RHEL RAC clusters. Anyone have any insight on this?
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тАО02-26-2008 12:18 PM
тАО02-26-2008 12:18 PM
Re: New Installation Red Hat
I would probably focus on the shared storage... If all of the nodes reboot at the same time, that suggests to me a problem on the EVA and/or the SAN switches...
That said, you haven't really given us much to go on in terms of the hardware/software configuration...
Cheers,
Rob
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тАО02-26-2008 01:13 PM
тАО02-26-2008 01:13 PM
Re: New Installation Red Hat
We just had HP Support look at the EVA logs, but nothing was found. Yes, there is a switch involved between the machines and the EVA switch.
Our plan was to attack the switch next.
Thanks for the input.
Regards,
-dl
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тАО02-26-2008 01:48 PM
тАО02-26-2008 01:48 PM
Re: New Installation Red Hat
I was hinting that you might get more help, if you were to detail the setup more completely...
How are things connected together ?
What versions are you running ?
Cheers,
Rob