From mboxrd@z Thu Jan  1 00:00:00 1970
From: Akira Hayakawa <ruby.wktk@gmail.com>
Subject: Re: How dm multipath handle IO
Date: Fri, 14 Mar 2014 18:12:05 +0900
Message-ID: <5322C7E5.8020000@gmail.com>
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Hi,

Let's google it.
Is this the article you are looking for?
https://www.kernel.org/doc/ols/2007/ols2007v2-pages-235-244.pdf

--
Akira

On 3/14/14 5:44 PM, Nicolas Michel wrote:
> Hello Guys,
> 
> It's a general question about how dm and particularly multipathd handle IO? I mean, is it a transaction? Is each IO initiated from the OS get back an acknowledgement? If it is, is there a retry mechanism?
> Or are the IO sent blindingly to the block device?
> 
> If someone have some good article on it, I would be very interested in understanding more deeply how IO are handled.
> 
> Thanks a lot,
> 
> -- 
> Nicolas MICHEL
> 
> 
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