RE: Creation of ASM Disk Group on Solaris 10 ?

Thanks Alex. Can you provide some documentation to support your "no SAN striping" point?

        -Randy    

Randy Johnson
Sr. Technical Consultant
Enkitec, LLP

Office ..... 817-255-3580
Mobile .... 817-564-6583
Email ..... randy.johnson_at_enkitec.com 

-----Original Message-----
From: gorbyx_at_gmail.com [mailto:gorbyx_at_gmail.com] On Behalf Of Alex Gorbachev Sent: Monday, July 09, 2007 5:30 PM
To: randyjo_at_sbcglobal.net; oracle-l_at_freelists.org Subject: Re: Creation of ASM Disk Group on Solaris 10 ?

Good answer for RTFM question Randy.
Just a little comment about striping over striping. ASM works best if you can avoid striped volumes but, instead, can give separate physical spindle as the LUN. This is how it was designed to work. Unfortunately, in real life storage admins often can't be bothered. :-(

On 7/9/07, Randy Johnson <randyjo_at_sbcglobal.net> wrote:
> Vivek,
> This is the kind of question that if you have to ask you are not ready
> for the answer. The best advice I could give you is to read Nitin
> Vengurlekar's "ASM Best Practices" white paper and refer you to
> Oracle's Cluster Ready ServicesInstallation Guide. If you've never
> done this before you should brace yourself for some heavy reading.
>
> In short to answer your questions the raw devices (LUN's) you want to
> use for ASM must be shared and visible to all nodes. This is generally
> done using HBA (host bus adapter) cards that allow your servers to
> "see and interact with" the SAN storage array. There are some
> specifics in configuring ASM on Solaris (which slices you can/should
> use) and which slice to never use. Regarding commands for SAME. This
> is done by having your storage administrator stripe the volumes across
several physical devices.
> Then you as the DBA come through and configure your ASM volume groups
> as a combination of these "striped" LUN's. In other words the LUNS are
> striped on the SAN and the ASM Diskgroups provide a second layer of
striping.
>
> -Randy
>
>
>
> Randy Johnson
> Sr. Technical Consultant
> Enkitec, LLP
>
> Office ..... 817-255-3580
> Mobile .... 817-564-6583
> Email ..... HYPERLINK
> "mailto:randy.johnson_at_enkitec.com"randy.johnson_at_enkitec.com
>
>
>
> _____
>
> From: oracle-l-bounce_at_freelists.org
> [mailto:oracle-l-bounce_at_freelists.org]
> On Behalf Of VIVEK_SHARMA
> Sent: Monday, July 09, 2007 3:09 AM
> To: oracle-l_at_freelists.org
> Subject: Creation of ASM Disk Group on Solaris 10 ?
>
>
>
> Folks
>
>
>
> Need to Setup a 2 Instance ASM-RAC Database from scratch for an
> internal Test Benchmark.
>
>
>
> * What Commands are used to create an External ASM Disk Group on
> Solaris 10?
>
> * Any Additional Solaris Commands to make the SAME Disk Group Visible
> to BOTH SUN Nodes?
>
>
>
> NOTE - Disk Group to use External Hardware RAID (10) provided by the
> Storage Box
>
>
>
> Oracle 10gR2 on Solaris 10
>
>
>
> Any Docs, Links will help
>
>
>
> Cheers & Thanks indeed
>
>
>
> Vivek
>
>
>
>
>
>
>
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--
Alex Gorbachev, Oracle DBA Brewer, The Pythian Group
http://www.pythian.com/blogs/author/alex http://blog.oracloid.com BAAG party
- www.BattleAgainstAnyGuess.com

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