From mboxrd@z Thu Jan  1 00:00:00 1970
From: Heinz Mauelshagen <heinzm@redhat.com>
Subject: Re: How does dm-thinp handle the our of space error?
Date: Wed, 09 Mar 2011 09:56:19 +0100
Message-ID: <1299660979.3310.5.camel@o>
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On Wed, 2011-03-09 at 11:59 +0800, Xie Gang wrote:
> Hi,
>  
> The storage may run out of space and could not provision the space.
> So, how does thinp handle such error since thinp is transparent to
> uper layer filesystem?

It either postpones the bios until userspace has reacted growing the
pool _or_ it errors the ios depending on the related policy set.

This is defined by constructore parameter
 * 4: policy = "error|postpone":
 *             if pool runs full, bios will be errored or postponed
 *             (ie. application writes will stall)

Heinz

>  
> Thanks,
> 
> -- 
> Xie Gang
> 
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