From: Roland Dreier <roland@purestorage.com>
To: Ric Wheeler <rwheeler@redhat.com>
Cc: linux-fsdevel@vger.kernel.org,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>
Subject: Re: [LSF/MM TOPIC] linux servers as a storage server - what's missing?
Date: Wed, 18 Jan 2012 10:46:12 -0800 [thread overview]
Message-ID: <CAL1RGDXDaeNG_YVC38f4nxvBA+btbypcW=1KyEzm90UQOw3HiQ@mail.gmail.com> (raw)
In-Reply-To: <4F1706AD.3080405@redhat.com>
> Why would you crash is you have device mapper multipath configured to handle
> path fail over? We have tons of enterprise customers that use that...
cf http://www.spinics.net/lists/linux-scsi/msg56254.html
Basically hot unplug of an sdX can oops on any recent kernel, no
matter what dm stuff you have on top.
> On the broader topic of error handling and so on, I do agree that is always
> an area of concern (how many times to retry, how long time outs need to be,
> when to panic/reboot or propagate up an error code)
Yes, especially the scsi eh stuff escalating to a host reset when
a single drive has gone bad -- even if the HBA is happily doing IO
to other drives, we'll kill access to the whole SAS fabric.
- R.
next prev parent reply other threads:[~2012-01-18 18:46 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-21 15:59 [LSF/MM TOPIC] linux servers as a storage server - what's missing? Ric Wheeler
2011-12-22 8:14 ` Shyam_Iyer
2011-12-22 15:58 ` Vivek Goyal
2011-12-22 20:54 ` Shyam_Iyer
2011-12-23 3:06 ` Vivek Goyal
2011-12-23 4:35 ` Shyam_Iyer
2012-01-09 12:18 ` Hannes Reinecke
2012-01-09 12:59 ` Tom Coughlan
2012-01-10 6:53 ` Ric Wheeler
2012-01-20 8:55 ` Hannes Reinecke
2012-01-19 16:17 ` [LSF/MM TOPIC] linux servers as a storage server - what'smissing? Loke, Chetan
2012-01-19 16:19 ` Ric Wheeler
2012-01-19 16:26 ` Loke, Chetan
2012-01-19 16:29 ` Ric Wheeler
2012-01-19 17:32 ` Loke, Chetan
2012-01-19 17:44 ` Ric Wheeler
2012-01-19 21:30 ` Loke, Chetan
2012-01-19 21:39 ` Ric Wheeler
2012-01-24 17:05 ` Loke, Chetan
2012-01-24 18:13 ` Ric Wheeler
2012-01-26 22:24 ` Dave Chinner
2012-01-26 22:29 ` Ric Wheeler
2012-01-03 19:26 ` [LSF/MM TOPIC][ATTEND] linux servers as a storage server - what's missing? Jeff Layton
2012-01-03 19:32 ` Chuck Lever
2012-01-17 21:16 ` J. Bruce Fields
2012-01-17 21:25 ` Chuck Lever
2012-01-24 21:36 ` J. Bruce Fields
2012-01-24 23:13 ` Ric Wheeler
2012-01-25 19:05 ` Christopher R. Hertel
2012-01-25 20:25 ` Christopher R. Hertel
2012-01-25 21:56 ` Roland Dreier
2012-01-25 22:09 ` Christopher R. Hertel
2012-01-26 21:52 ` Andy Grover
2012-01-26 11:15 ` Bart Van Assche
2012-01-18 17:00 ` [LSF/MM TOPIC] " Roland Dreier
2012-01-18 17:51 ` Ric Wheeler
2012-01-18 18:46 ` Roland Dreier [this message]
2012-01-18 18:51 ` Bart Van Assche
2012-01-18 19:00 ` Roland Dreier
2012-01-19 8:16 ` Rolf Eike Beer
2012-01-19 17:50 ` Loke, Chetan
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