From: Tom H <tom@limepepper.co.uk>
To: unlisted-recipients:; (no To-header on input)
Cc: linux-nfs@vger.kernel.org
Subject: Re: why do attempts to access a nfs v3 filesystem (ro,soft) block the process for minutes at a time? (when the nfs server is down)
Date: Fri, 16 Jul 2010 17:10:24 +0100 [thread overview]
Message-ID: <4C408470.1090709@limepepper.co.uk> (raw)
In-Reply-To: <4C4079CC.8070205@oracle.com>
Chuck Lever wrote:
> On 07/16/2010 11:20 AM, Tom H wrote:
>>
>> (also I noticed that it seems to timeout quicker with the mount options
>> set like (soft, timeo=7, retrans=3) which is unexpected, because they
>> are supposed to be the default)
>
> They are the default settings for UDP mounts, but you didn't specify
> UDP. TCP is the default transport protocol, and has been for some
> time. TCP uses a long retransmit timeout. See nfs(5).
>
OK, I see that now. Thanks.!
However further experimentation with mount options
(ro,soft,retrans=0,timeo=0,intr,proto=tcp) - requests to a failed nfs
file-system still block the apache process for some apparently random
time up to 3 minutes.
Cheers
T
next prev parent reply other threads:[~2010-07-16 16:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-16 15:20 why do attempts to access a nfs v3 filesystem (ro,soft) block the process for minutes at a time? (when the nfs server is down) Tom H
2010-07-16 15:25 ` Chuck Lever
2010-07-16 16:10 ` Tom H [this message]
2010-07-16 16:26 ` Chuck Lever
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