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Home -> Community -> Mailing Lists -> Oracle-L -> Re: ASM to replace vxvm/vxfs;
Hello,
oracle-l-bounce_at_freelists.org wrote on 19/12/2007 13:39:11:
> thanks Krish, your points are very helpful, especially on point 1/2.
>
> Overall are people happy with ASM? Performance wise, and management
> overhead (compared to OS volume manager/filesystem )?
> stable(whether lots of bugs, or some minor bug with patch
> avalible/easy workaround)?
>
Somewhat like yourself (though smaller data volumes), we moved from running Veritas (vxvm/vxfs) to using ASM. We too use EMC powerpath for multipathing and this has proved reliable. In our case, we are using RAC so needed some form of cluster aware storage. We did this migration some 18 months ago, and have been running on 10.2.0.2 and now 10.2.0.3. The most worrying thing for us was how reliable ASM was going to be, as it was (and to some extent still is) fairly new technology. We have not encountered any stability issues with it so far. The performance has not been an issue, but then should you not get near raw performance as opposed to a cooked filesystem?
We run external redundancy - for us why pay EMC $$$ and not use the storage arrays capabilities. All issues I've heard of, mostly via UKOUG events have been related to using ASM mirroring and rebalancing on disk failure/adding new drives. If you get the latest and greatest patchset you'll probably be fine, I'm sure this is not the case with you (we are all on 10.2 now, right?), but I personally would not have touched ASM in the early 10.1 patchsets.
For me, I was keen to move away from the additional overhead of having to understand/debug veritas issues, taking one supplier out of the loop seemed a sensible strategy and so far this has proved to be the case. Though, if you are using VCS for failover, then this may not have a direct read across for you.
regards,
jason.
>
> -Krish
>
>
>
>
>
> --
> Regards
> Zhu Chao
> www.cnoug.org
-- http://www.freelists.org/webpage/oracle-lReceived on Wed Dec 19 2007 - 08:41:00 CST
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