From: "Doug Griswold" <griswld@cio.sc.gov>
To: sdake@mvista.com, franc@tech.sirca.org.au
Cc: linux-raid@vger.kernel.org
Subject: Re: multipath - stable ?
Date: Fri, 12 Dec 2003 20:56:48 -0500 [thread overview]
Message-ID: <sfda2b99.034@gw.state.sc.us> (raw)
Ours takes about thirty seconds with qlogic and emulex cards.
>>> Franc Carter <franc@tech.sirca.org.au> 12/12/03 18:36 PM >>>
Thanks,
can you give me a ballpark on 'high' >5 minutes ?
cheers
On Sat, 13 Dec 2003 04:35 am, Steven Dake wrote:
> The multipath code is simple and seems pretty stable to me.
>
> There is one issue, in that failover can sometimes take a long time
> because of the SCSI layer's insistence upon executing error recovery.
> In the case of multipath I/O's, there is no need to error recover
before
> processing the I/O. Instead, once error is detected, failover, then
> start error recovery.
>
> The SCSI layer doesn't do this currently, so failover times are high.
>
> Thanks
> -steve
>
>
> On Thu, 2003-12-11 at 21:52, Franc Carter wrote:
> > Hi,
> >
> > I've been using linux sofwtare raid for years and had no problems.
> > We are about to install some disk systems that have dual contollers
> > and am wondering wether multipath is as stable as the rest of
software
> > raid ?
> >
> > thanks
>
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--
Franc Carter Ph:61-2-8374-5071 Fax: 61-2-8374-5070
Systems Manager, SIRCA Ltd http://www.sirca.org.au/
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next reply other threads:[~2003-12-13 1:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-13 1:56 Doug Griswold [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-12-12 4:52 multipath - stable ? Franc Carter
2003-12-12 17:35 ` Steven Dake
2003-12-12 23:35 ` Franc Carter
2003-12-15 22:00 ` Steven Dake
2003-12-15 22:13 ` Franc Carter
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