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From: Aurelien Degremont <aurelien.degremont@cea.fr>
To: lustre-devel@lists.lustre.org
Subject: [Lustre-devel] async write and abort_recov
Date: Mon, 12 Jul 2010 12:10:04 +0200	[thread overview]
Message-ID: <4C3AE9FC.5010705@cea.fr> (raw)

Hello

I'm wondering how Lustre client handles recovery when OST restarts with abort_recov flag set.

Let's say a client has page to flush to OST, but OST is stopped, then restarts with -o abort_recov.
There is no recovery, so:
1- client retakes extent locks and then re-try to flush its pages
or
2- client cannot flush anymore and drop the i/o, returns an error to the caller.


If #2, what if the process has already closed the file ?
What is the file is still opened and the process try to do another I/O, will it have an error for the former bad i/o?


abort_recov is used only at first start, or the OST uses this flag until it is stopped for any other recovery-like
mechanisms?


Thanks

-- 
Aurelien Degremont

             reply	other threads:[~2010-07-12 10:10 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-12 10:10 Aurelien Degremont [this message]
2010-07-12 20:16 ` [Lustre-devel] async write and abort_recov Andreas Dilger
2010-07-15  8:05   ` Aurelien Degremont
2010-07-15 16:19     ` Andreas Dilger
2010-07-15 18:57       ` John Hammond
2010-07-15 19:25         ` Alexey Lyashkov

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