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Re: Copy file , file blocks is different

To: Homer Li <01jay.ly@xxxxxxxxx>
Subject: Re: Copy file , file blocks is different
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Thu, 24 Jan 2013 21:42:45 +1100
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <CAG1+85EwFH9mGkVqs=nkSVaX0J82iDMMbQ=____dRstUSsmJpw@xxxxxxxxxxxxxx>
References: <CAG1+85EwFH9mGkVqs=nkSVaX0J82iDMMbQ=____dRstUSsmJpw@xxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Thu, Jan 24, 2013 at 05:48:25PM +0800, Homer Li wrote:
> Hello,
> 
>      There are 2 file in the xfs device,  md5 is the same,  but the size is
> different.
>       I don't know why .......

Speculative preallocation. Google "XFS NFS speculative
preallocation" - I've explained it plenty of times on this list  and
don't need to do it again.

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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