Re: Oracle ASM and multipathed disk devices

NetComrade wrote:
> All,
>
> Does Oracle address dual pathing to disks in any way?
>
> E.g. Veritas, has something called vxdmp which automatically fails IO
> over to a different path, if path 1 fails
>
> If OS handles this for you, please list
> OS/hardware/drivers/specifics.. (especially interested on how it's
> done on Linux)
>
> Thanks!
> .......
> We use Oracle 8.1.7.4 and 9.2.0.5 on Solaris 2.7 boxes
> remove NSPAM to email

With linux, from 2.6.x kernel, you have multiptah-tools, a userspace implementation of multipath based on the DM framework.

Several policies are implemented (failover, roud-robin, etc.). Otherwise there are specific software implemented by the storage vendors.

Qlogic driver has a built in failover (not really multipath).

Linux is going toward multipath-tools.

Regards

-- 
Fabrizio Magni

fabrizio.magni_at_mycontinent.com

replace mycontinent with europe