From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: "Tomasz Kłoczko" <kloczek@rudy.mif.pg.gda.pl>,
"Phil Oester" <kernel@linuxace.com>,
linux-kernel@vger.kernel.org, apiszcz@lucidpixels.com
Subject: Re: Kernel 2.6.15.1 + NFS is 4 times slower than FTP!?
Date: Tue, 17 Jan 2006 13:24:27 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.64.0601171324010.25508@p34> (raw)
In-Reply-To: <1137521483.14135.59.camel@localhost.localdomain>
[-- Attachment #1: Type: TEXT/PLAIN, Size: 742 bytes --]
Alan, is it normal for FTP to be 2x as fast as NFS?
With 100mbps, I never seemed to have any issues, but with GIGABIT I
definitely see all sorts of weird issues.
On Tue, 17 Jan 2006, Alan Cox wrote:
> On Maw, 2006-01-17 at 18:48 +0100, Tomasz Kłoczko wrote:
>>> I wonder how much faster NFS over TCP would be, or if NFS in the kernel is
>>> the problem itself?
>>
>> On Linux NFS over TCP is slower than over UDP ~10%.
>
> For the specific case you measured. Its never quite that simple because
> behaviour over different networks and error patterns varies a lot and
> TCP can be a big win on loaded networks or under error conditions,
> especially packet loss, where fragmentation losses kill throughput on
> UDP.
>
>
next prev parent reply other threads:[~2006-01-17 18:24 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-17 1:07 Justin Piszcz
2006-01-17 1:23 ` Phil Oester
2006-01-17 1:32 ` Justin Piszcz
2006-01-17 17:48 ` Tomasz Kłoczko
2006-01-17 18:11 ` Alan Cox
2006-01-17 18:24 ` Justin Piszcz [this message]
2006-01-17 18:33 ` Alan Cox
2006-01-17 18:37 ` Trond Myklebust
2006-01-17 18:38 ` Justin Piszcz
2006-01-17 18:53 ` Trond Myklebust
2006-01-17 18:55 ` Justin Piszcz
2006-01-17 19:01 ` Trond Myklebust
2006-01-17 19:03 ` Justin Piszcz
2006-01-17 20:39 ` Jan Engelhardt
2006-01-17 20:45 ` Justin Piszcz
2006-01-17 22:07 ` Jan Engelhardt
2006-01-17 22:13 ` Lee Revell
2006-01-17 23:19 ` Justin Piszcz
2006-01-17 23:39 ` Lee Revell
2006-01-18 0:43 ` Trond Myklebust
2006-01-17 9:50 ` Justin Piszcz
2006-01-17 17:10 ` Jan Engelhardt
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