Re: [suse-oracle] Best use of ASM

Hello,
Good Strategy!

Remember create also two ASM diskgroups :
1. DATA (For online data:Datafiles, online redo logs, control files,spfile)
2. FRA (Flash Recovery area used to store archivers, rman backups etc.

The idea is to use you 6 RAID 1 luns, as ROB comment and use the 6 disks for
Data and FRA to maximize performance.
You can create disks partitions to get this model in every phy disk and
create 2 partitions*PHY Disk o (maybe 60%-40%) This depend if
you Database run a lot of transacctions, and generate a lot of archivers and
you backup model, using RMAN to FRA or other strategy,  and then create the
data disk group on the six first partitions and FRA disk groups on other six
partitions. I recommend also start the data partition to use the outer
tracks disks, that provide better performance.

Best regards
Arturo

2010/6/4 Robert Suh <[email protected]>

>  We are using ASM.  We are not using asmlib, since we didn't want to be
> tied to Oracle's releases for the kernel modules.
>
>
>
> I would highly recommend ASM.  ext3 is garbarge.  If you don't want to use
> ASM, look at XFS or ext4.
>
>
>
> With the 12 disks, I would create 6 RAID 1 luns (hardware RAID) and let
> Oracle stripe across the 6 disks by creating one ASM disk group.
>
>
>
> All of the data go into the one ASM disk group.
>
>
>
> Rob
>
>
>
>
>
>
>
> *From:* [email protected] [mailto:
> [email protected]] *On Behalf Of *Stacy Gaddy
> *Sent:* Thursday, June 03, 2010 2:21 PM
>
> *To:* [email protected]
> *Subject:* [suse-oracle] Best use of ASM
>
>
>
> I am in the process of building a new server and considering using ASM. The
> configuration is as follows:
>
>
>
> 2 disks - RAID 1 - SLES11/Oracle 11gR2
>
> 12 disks on a raid controller to be used for Oracle.
>
>
>
> Traditionally I have used RAID 10 or RAID 1 depending of type of files
> being stored on the logical disk. Data on RAID 10, control, redo, and
> archive on RAID 1.
>
>
>
> How would you divide up the 12 disks between control, redo, data, and FRA?
> Would you use hardware RAID instead of the built-in Oracle mirroring and
> striping?
>
>
>
> There doesn't seem to be any good documentation out there to give best
> practices relating to using hardware RAID vs ASM redundancy.
>
>
>
> Thanks,
>
> Stacy
>
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>

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