From James Melin's 12/14/2006 post:
Mark, I saw something similar when we first went to SLES-9 (64 bit). We had
MTU sizes being negotiated down to an idiotic packet size of 1492.
Whether or not this has to do with how our OSA is configured I never did learn.
Search for stuff with hipersockets
Subject
Re: Hipersocket Performance Problem
on SLES 9
01/19/2007 04:55
AM
Please respond to
Linux on 390 Port
[EMAIL PROTECTED]
IST.EDU
More info:
FTP GET's of this cached 256MB file to /dev/null have run as fast as 205
MB/sec w/ MTU=32760 over hipersocket interfaces, and 168 MB over virtual
CTCs. FTP PUT's are a different matter: hipersocket or CTC doesn't make a
difference. The higher MTU size, the slower the transfer rate
I've seen this a lot. You need to find the real bottleneck. Are
you equiped?
Mark Wheeler wrote:
More info:
FTP GET's of this cached 256MB file to /dev/null have run as fast as 205
MB/sec w/ MTU=32760 over hipersocket interfaces, and 168 MB over virtual
CTCs. FTP PUT's are a different
Just to bring everyone up to speed (it's been a while): I've done more
testing and so far have seen this only between two SLES9 systems. Things
run fine up to MTU=32084; at MTU=32085 and above throughput drops to
~400KB/sec. Problem has been reported to SuSE but haven't heard back from
them.
What
-390@VM.MARIST.EDU
cc
Subject
Re: Hipersocket Performance Problem on SLES 9
Mark, I saw something similar when we first went to SLES-9 (64 bit). We
had MTU sizes being negotiated down to an idiotic packet size of 1492.
Whether or not this has to do with how our OSA is configured I never did
Subject
Re:
Hipersocket Performance Problem on SLES 9
Please respond
/2006 02:28 PM
Please respond to
Linux on 390 Port LINUX-390@VM.MARIST.EDU
To
LINUX-390@VM.MARIST.EDU
cc
Subject
Re: Hipersocket Performance Problem on SLES 9
Novell can't even find the ticket # I gave you that we filed this under?
Tom Shilson [EMAIL PROTECTED
Re:
Hipersocket Performance Problem on SLES 9
Please respond to
Linux on 390 Port LINUX-390@VM.MARIST.EDU
I don't know what they are doing. I opened the incident on-line
yesterday. They came right back and request more info. I
Greetings all,
I've been using real hipersockets for a couple years now. Recently a
significant performance problem with SLES 9 and large MTU sizes was brought
to my attention. I've been using MTU=32760. I set up a test to illustrate
the problem. I built a 256 MB file on one zLinux guest (running
Hipersocket Performance Problem on SLES 9
Please respond to
Linux on 390 Port LINUX-390@VM.MARIST.EDU
Greetings all,
I've been using real hipersockets for a couple years now. Recently a
significant
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