From: Mikhail Pershin <Mikhail.Pershin@Sun.COM>
To: lustre-devel@lists.lustre.org
Subject: [Lustre-devel] [RFC] "lctl readonly" modification proposal
Date: Wed, 20 Aug 2008 23:42:39 +0400 [thread overview]
Message-ID: <op.uf7ac4keatmt0c@goga> (raw)
In-Reply-To: <C4D1B2E1.575A%peter.braam@sun.com>
On Wed, 20 Aug 2008 21:39:13 +0400, Peter Braam <Peter.Braam@sun.com>
wrote:
> If I remember correctly the flush is only there to try to reduce
> rollback.
Also to be sure that all before barrier is on disk, many test cases about
recovery rely on the fact that operations before barrier are on disk. This
is important with HARD failure case especially, without sync before
barrier the operations before barrier may be lost and affect the tests.
I agree that syncless variant of barrier is needed but we also need
barrier with sync depending on test case.
--
Mikhail Pershin
Staff Engineer
Lustre Group
Sun Microsystems, Inc.
next prev parent reply other threads:[~2008-08-20 19:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-20 11:23 [Lustre-devel] [RFC] "lctl readonly" modification proposal Alexander Zarochentsev
2008-08-20 17:39 ` Peter Braam
2008-08-20 19:29 ` Andreas Dilger
2008-08-22 15:45 ` Alexander Zarochentsev
2008-08-24 2:02 ` Andreas Dilger
2008-08-28 17:11 ` Nathaniel Rutman
2008-08-28 20:25 ` Andreas Dilger
2008-08-29 18:46 ` Nathaniel Rutman
2008-08-20 19:42 ` Mikhail Pershin [this message]
2008-08-20 19:59 ` Peter Braam
2008-08-21 9:24 ` Alexander Zarochentsev
2008-08-21 10:03 ` Mikhail Pershin
2008-08-21 10:43 ` Alex Zhuravlev
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