Date: Mon, 9 Sep 2002 12:49:44 +0200
From: Lars Marowsky-Bree <lmb@suse.de>
To: linux-kernel@vger.kernel.org
Subject: [RFC] Multi-path IO in 2.5/2.6 ?
Message-ID: <20020909104944.GH27887@marowsky-bree.de>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
User-Agent: Mutt/1.4i
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1207
Lines: 34

Morning everyone,

I hope people are waking up by now ;-)

So, what is the take on "multi-path IO" (in particular, storage) in 2.5/2.6?

Right now, we have md multipathing in 2.4 (+ an enhancement to that one by
Jens Axboe and myself, which however was ignored on l-k ;-), an enhancement to
LVM1 and various hardware-specific and thus obviously wrong approaches.

I am looking at what to do for 2.5. I have considered porting the small
changes from 2.4 to md 2.5. The LVM1 changes are probably and out gone, as
LVM1 doesn't work still.

I noticed that EVMS duplicates the entire md layer internally (great way to
code, really!), so that might also require changing if I update the md code.

Or can the LVM2 device-mapper be used to do that more cleanly?

I wonder whether anyone has given this some thought already.


Sincerely,
    Lars Marowsky-Br?e <lmb@suse.de>

-- 
Immortality is an adequate definition of high availability for me.
	--- Gregory F. Pfister

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/