linux-kernel - Re: Problem to recognize that the file system is full

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Date:	Fri, 07 Sep 2007 06:28:33 +0930
From:	David Newall <david@...idnewall.com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
CC:	Guilherme Vilela <vilela.list@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Problem to recognize that the file system is full

Jan Engelhardt wrote:
> On Sep 4 2007 13:53, Guilherme Vilela wrote:
>   
>> I'm tryng to mount a nfs file system with the option async and run a
>> program that writes to the file system. The problem is that the
>> program keep writing even when the file system is full.
>>     
>
> man 5 exports
>
>    async  This option allows the NFS server to violate  the  NFS  protocol
>           and  reply  to  requests before any changes made by that request
>           have been committed to stable storage (e.g. disc drive).
>   

(That means it's a feature.)

>> This program does'nt occur when mounting with the sync
>> option or with async and noac option, but the performance get very
>> poor and that is important to my application. The problem doesnt occur
>> too with the local file system. I'm running linux centos 5.0.
>>     
>
> About ac/localhost, I am not really sure what makes it work.
man 5 nfs

   noac Disable attribute caching, and force synchronous writes.  This
        extracts a server performance penalty but it allows two different
        NFS clients to get reasonable good results when both clients are
        actively writing to common filesystem on the server.

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