Re: ASM to replace vxvm/vxfs;

thanks Krish, your points are very helpful, especially on point 1/2. It cleared some of my questions. So storage vendor manages the MultiPathing and just provide oracle way to use the storage;

Problem comes with ASM is we have to rewrite major of our monitoring stuff to adapt into the new ASM setup. (like auto add of datafile, manage of archivelogs), but it should be quick to fix.

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)?

Lots of thing to read about ASM yet.
On Dec 18, 2007 9:15 AM, <krish.hariharan_at_quasardb.com> wrote:

> Yes I have built several the largest of it went from 0-20TB in about 6
> months.
>
> 1. We looked at MPXIO but ended up using EMC powerpath. ASM does not
> handle that part. You provided the consolidated device to ASM
>
> 2. Except for the OCR and Voting disks, Yes. Just make sure that the same
> LUNS are available from all nodes even if its not by the same name (you
> can use EMC powermt for example)
>
> 3. The issue you would run into is memory. I am still weiging the pros and
> cons of provisioning all the instances on all the servers vs only on some
> servers - have done both schems. I have managed the client the instance
> association by starting and stopping services. You could apply the same
> principle for instances as well. If you use kind of the airline model for
> overbooking you should at times be prepared to kick some passengers off or
> apply the pigeon hole principle, yikes!
>
> -Krish
>
>
>
>

-- 
Regards
Zhu Chao
www.cnoug.org

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