Messages in this thread |  | | Date | Tue, 18 Sep 2001 22:59:52 +0200 | From | Ragnar Kjørstad <> | Subject | Re: [patch] multipath RAID personality, 2.4.10-pre9 |
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On Tue, Sep 18, 2001 at 08:39:46PM +0100, Adrian Bridgett wrote: > 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. > > In fact that brings up another point - which path do you use by default? If > you have the SAN situation where you have a farm of servers each with two FC > cards two two FC switches and then to two ports on a storage array, you > don't want everything going to the first switch. Just picking one path to > use at random would be preferable (unless you want to swap every other > servers cables around).
I think the multipath driver would benefit from something like the different modes in the new network bonding driver: * round robin * active backup policy * XOR
(Not sure if XOR would be needed for md?)
I think some other ideas can be stolen from the bonding driver as well, as the problem is very simular - e.g. the concept of low level drivers (optionally) delivering status information, so md don't have to try and fail to detect a link is down, and the timeout settings.
-- Ragnar Kjørstad Big Storage - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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