AF:
NF:0
PS:10
SRH:1
SFN:
DSR:
MID:<20090623101744.2bdfc735@ripper.onstor.net>
CFG:
PT:0
S:andy.sharp@onstor.com
RQ:
SSV:mail.onstor.net
NSV:
SSH:
R:<sandrine.boulanger@onstor.com>,<patrick.haverty@onstor.com>,<John.Keiffer@onstor.com>,<brian.stark@onstor.com>,<larry.scheer@onstor.com>
MAID:1
X-Sylpheed-Privacy-System:
X-Sylpheed-Sign:0
SCF:#mh/Mailbox/sent
RMID:#imap/andys@onstor.net@exch1.onstor.net/INBOX	0	102AB4F33EBBDB4C91915B145C8E9FB31370B0120C@exch1.onstor.net
X-Sylpheed-End-Special-Headers: 1
Date: Tue, 23 Jun 2009 10:18:06 -0700
From: Andrew Sharp <andy.sharp@onstor.com>
To: Sandrine Boulanger <sandrine.boulanger@onstor.com>
Cc: Patrick Haverty <patrick.haverty@onstor.com>, John Keiffer
 <John.Keiffer@onstor.com>, Brian Stark <brian.stark@onstor.com>, Larry
 Scheer <larry.scheer@onstor.com>
Subject: Re: File Copies with Jumbo Frames set
Message-ID: <20090623101806.1ec5bfd7@ripper.onstor.net>
In-Reply-To: <102AB4F33EBBDB4C91915B145C8E9FB31370B0120C@exch1.onstor.net>
References: <102AB4F33EBBDB4C91915B145C8E9FB31370ABC13C@exch1.onstor.net>
	<102AB4F33EBBDB4C91915B145C8E9FB31370B0120C@exch1.onstor.net>
Organization: Onstor
X-Mailer: Sylpheed-Claws 2.6.0 (GTK+ 2.8.20; x86_64-pc-linux-gnu)
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

This means one or both of the drivers doesn't actually work with mtu
set that high.  You may have tried it already, but if not, it would
probably be worth it to try 6000 and 4000.

On Mon, 22 Jun 2009 17:28:02 -0700 Sandrine Boulanger
<sandrine.boulanger@onstor.com> wrote:

> Not good. Maybe it's time to get help from IT to setup mtu on a
> switch and client and try that route, even though I would have
> thought going directly from one LS to the other should have worked.
> 
> -----Original Message-----
> From: Patrick Haverty 
> Sent: Monday, June 22, 2009 5:11 PM
> To: Patrick Haverty; Sandrine Boulanger; Andy Sharp
> Cc: John Keiffer; Brian Stark; Larry Scheer
> Subject: RE: File Copies with Jumbo Frames set
> 
> In direct connect, with one or both systems set to mtu 1500 I can
> copy files across.  If both systems are set to 9000 the systems can
> ping one another, but the scp copy just hangs. 
> 
> -----Original Message-----
> From: Patrick Haverty 
> Sent: Monday, June 22, 2009 2:43 PM
> To: Sandrine Boulanger; Andy Sharp
> Cc: John Keiffer; Brian Stark; Larry Scheer
> Subject: RE: File Copies with Jumbo Frames set
> 
> I hadn't done a direct connect yet.  But I can try that now. 
> 
> -----Original Message-----
> From: Sandrine Boulanger
> Sent: Monday, June 22, 2009 2:07 PM
> To: Patrick Haverty; Andy Sharp
> Cc: John Keiffer; Brian Stark; Larry Scheer
> Subject: RE: File Copies with Jumbo Frames set
> 
> I thought you direct connected the systems? If not, yes, that won't
> work until the entire path is configured for jumbo.
> 
> -----Original Message-----
> From: Patrick Haverty
> Sent: Monday, June 22, 2009 2:05 PM
> To: Sandrine Boulanger; Andy Sharp
> Cc: John Keiffer; Brian Stark; Larry Scheer
> Subject: RE: File Copies with Jumbo Frames set
> 
> May be that there needs to be some specific settings on other
> equipment along the route.
> 
> -----Original Message-----
> From: Sandrine Boulanger
> Sent: Monday, June 22, 2009 11:51 AM
> To: Patrick Haverty; Andy Sharp
> Cc: John Keiffer; Brian Stark; Larry Scheer
> Subject: RE: File Copies with Jumbo Frames set
> 
> That does not sound right...
> 
> -----Original Message-----
> From: Patrick Haverty
> Sent: Monday, June 22, 2009 11:43 AM
> To: Andy Sharp; Sandrine Boulanger
> Cc: John Keiffer; Brian Stark; Larry Scheer
> Subject: RE: File Copies with Jumbo Frames set
> 
> I couldn't find tcpdump, but I did run snoop.  In the test where I
> had both sides set to mtu 9000 the lines reported both "length: 1514"
> and "Len=1448".  When the mtu setting were set to 1500 the lines
> reported "length: 1514" and "Len=1460". I don't know if either
> "length" or "Len" relate to the frame size, but I'm suspecting there
> wasn't much that changed in the transfer framing.
> 
> -----Original Message-----
> From: Andy Sharp
> Sent: Monday, June 22, 2009 11:27 AM
> To: Sandrine Boulanger
> Cc: Patrick Haverty; John Keiffer; Brian Stark; Larry Scheer
> Subject: Re: File Copies with Jumbo Frames set
> 
> tcpdump should be there, you can use that in a pinch ~:^)
> 
> On Mon, 22 Jun 2009 10:26:36 -0700 Sandrine Boulanger
> <sandrine.boulanger@onstor.com> wrote:
> 
> > They don't seem to be there, they would have to be installed and 
> > compiled, not my thing! I haven't looked at Dtrace yet, but I would
> > be surprised if it would not take a packet capture that can be read
> > and analyzed later on a client which has any of the 2.
> > ________________________________ From: Patrick Haverty Sent:
> > Monday, June 22, 2009 9:54 AM To: John Keiffer; Sandrine Boulanger;
> > Brian Stark; Larry Scheer; Andy Sharp Subject: RE: File Copies with
> > Jumbo Frames set
> > 
> > Yeah, I haven't yet found anything in Dtrace or Analytics that seem
> > to indicate frame size.  Would Ethereal or Wireshark typically be
> > found on a Leopard system?  If not, then I'd say they are not
> > installed.
> > 
> > ________________________________
> > From: John Keiffer
> > Sent: Monday, June 22, 2009 9:50 AM
> > To: Sandrine Boulanger; Patrick Haverty; Brian Stark; Larry Scheer; 
> > Andy Sharp Subject: RE: File Copies with Jumbo Frames set I've been 
> > looking, but I don't think Dtrace can do that.
> > 
> > ________________________________
> > From: Sandrine Boulanger
> > Sent: Monday, June 22, 2009 9:48 AM
> > To: Patrick Haverty; Brian Stark; Larry Scheer; John Keiffer; Andy 
> > Sharp Subject: RE: File Copies with Jumbo Frames set
> > 
> > Is Ethereal or Wireshark installed on the LS? Does Dtrace do packet 
> > tracing?
> > 
> > ________________________________
> > From: Patrick Haverty
> > Sent: Monday, June 22, 2009 9:34 AM
> > To: Brian Stark; Sandrine Boulanger; Larry Scheer; John Keiffer;
> > Andy Sharp Subject: File Copies with Jumbo Frames set
> > 
> > I don't know if it tells us anything, but here are the resulting
> > times copying files between two Leopard systems with mtu set to
> > 9000.  I'm still trying to find a way to see if it is actually
> > using the larger frame size.  At least it doesn't seem like it is
> > slowing anything down.  Anybody know how to verify actual frame
> > size used for transfer?
> > 
> > root@panterals2110:/volumes/mnt/test9000<mailto:root@panterals2110:/vo
> > lumes/mnt/test9000>#
> > scp
> > root@10.11.1.209:/var/cache/fp.core.5<mailto:root@10.11.1.209:/var/cac
> > he/fp.core.5> ./ The authenticity of host '10.11.1.209
> > (10.11.1.209)' can't be established. RSA key fingerprint is 
> > b7:65:12:df:ec:a5:c7:3e:0e:8b:6a:36:4b:96:28:7a. Are you sure you
> > want to continue connecting (yes/no)? yes Warning: Permanently
> > added '10.11.1.209' (RSA) to the list of known hosts. Password:
> > fp.core.5            100%
> > |*********************************************************************
> > |***********************|
> > 7219 MB    06:01
> > root@panterals2110:/volumes/mnt/test9000<mailto:root@panterals2110:/vo
> > lumes/mnt/test9000>#
> > scp
> > root@10.11.1.209:/var/cache/fp.core.6<mailto:root@10.11.1.209:/var/cache/fp.core.6> ./
> > Password: fp.core.6            100%
> > |*********************************************************************
> > |***********************|
> > 7219 MB    04:23
