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From: Mikolaj Golub <trociny@freebsd.org>
To: Pete French <petefrench@ingresso.co.uk>
Organization: TOA Ukraine
References: <E1Q492g-000CvZ-DI@dilbert.ticketswitch.com>
Sender: Mikolaj Golub <to.my.trociny@gmail.com>
Date: Mon, 28 Mar 2011 13:52:45 +0300
In-Reply-To: <E1Q492g-000CvZ-DI@dilbert.ticketswitch.com> (Pete French's
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Cc: freebsd-fs@freebsd.org, freebsd-stable@freebsd.org,
	freebsd-current@freebsd.org, pjd@freebsd.org
Subject: Re: Any success stories for HAST + ZFS?
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On Mon, 28 Mar 2011 10:47:22 +0100 Pete French wrote:

 >> It is not a hastd crash, but a kernel crash triggered by hastd process.
 >>
 >> I am not sure I got the same crash as you but apparently the race is possible
 >> in g_gate on device creation.
 >>
 >> I got the following crash starting many hast providers simultaneously:

 PF> This is very interestng to me - my successful ZFS+HAST only had
 PF> a single drive, but in my new setup I am intending to use two
 PF> HAST processes and then mirror across thhem under ZFS, so I am
 PF> likely to hit this bug. Are the processes stable once launched ?

Yes, you may hit it only on hast devices creation. The workaround is to avoid
using 'hastctl role primary all', start providers one by one instead.

-- 
Mikolaj Golub