Re: [patch] multipath RAID personality, 2.4.10-pre9

[Brian Beattie]

On Tue, Sep 18, 2001 at 08:39:46PM +0100, Adrian Bridgett wrote:
> On Mon, Sep 17, 2001 at 01:16:56 +0200 (+0000), Ingo Molnar wrote:
> [snip]
> > > [...] Also, it is my understanding that with some multipath hardware,
> > > if you read from the "backup" path it will kill access to the primary
> > > path (this can be used when more than one system access shared disk
> > > for failover).  As a result, we should always read from the "primary"
> > > path for each disk unless there is an error.
> > 
> > yes, and this is being done currently, only the primary path is used.
> 
> Do you have plans to change this?  I know that the SDD software for AIX load
> balances between paths (and I think EMC's Powerpaths do for AIX too), DMP
> (from Veritas) for Solaris doesn't.
> 

I have been working with the version of this code included in RH 7.1.
I have code that does round robin routing.  I'm working on cleaning it
up and plan to post shortly.

-- 
Brian Beattie
IBM Linux Technology Center - MPIO/SAN
[e-mail]
503.578.5899  Des2-3C-5