[SCore-users-jp] Re: [SCore-users] Network Trunking

[Shinji Sumimoto]

Hi.

Have you tuned the parameters of pm-ethernet.conf? 
http://www.pccluster.org/score/dist/score/html/en/man/man5/pm-ether-conf.html

If you use default value, please change and test performance.  I think
you should use the parameter around backoff 2400 maxnsend 24.

I tested communication performace of Network Trunking on 3C905B using
rpmtest. The results are showed page 85 in the paper: 

      Shinji Sumimoto. A Study of High Performance Communication Using
      a Commodity Network of Parallel Computers. Ph.D Dissertation
      presented to Keio University, 2000.

      http://www.pccluster.org/score/dist/score/papers/sumimoto00.pdf

In my evaluation, bandwidth performance of Network Trunking is
increased over 400Byte messages. This depend on architecture of
hardware and device driver. 3C905B is not so good performace as
eepro100 and tulip.

Shinji.

From: Chen Hao <chen ＠ mdl.ipc.pku.edu.cn>
Subject: [SCore-users-jp] Re: [SCore-users] Network Trunking
Date: Tue, 21 May 2002 11:17:04 +0800 (CST)
Message-ID: <Pine.LNX.4.33.0205211108470.5957-100000 ＠ mdl.ipc.pku.edu.cn>

chen>   Now it works. Thanks a lot. But when I use netpipe to bench the
chen> network bandwidth, I find that only when the transfered block size
chen> over 1024 bytes the network bandwidth has increased observably.
chen> Is this the bug of the design or other reason?
chen> 
chen> On Tue, 21 May 2002, Shinji Sumimoto wrote:
chen> 
chen> > Hi.
chen> > 
chen> > Please change network definition 
chen> > 
chen> > from
chen> > =======================================================
chen> > ethernet-x2	type=ethernet \
chen> > 		-config:file=/opt/score/etc/pm-ethernet-1.conf
chen> > 		-trunk0:file=/opt/score/etc/pm-ethernet-0.conf
chen> > =======================================================
chen> > 
chen> > to
chen> > =======================================================
chen> > ethernet-x2	type=ethernet \
chen> > 		-config:file=/opt/score/etc/pm-ethernet-1.conf \
chen> > 		-trunk0:file=/opt/score/etc/pm-ethernet-0.conf
chen> > =======================================================
chen> > 
chen> > Your definition only use /opt/score/etc/pm-ethernet-1.conf network.
chen> > 
chen> > Shinji.
chen> > 
chen> > From: Chen Hao <chen ＠ mdl.ipc.pku.edu.cn>
chen> > Subject: Re: [SCore-users] Network Trunking
chen> > Date: Tue, 21 May 2002 00:13:58 +0800 (CST)
chen> > Message-ID: <Pine.LNX.4.33.0205210001160.2522-200000 ＠ mdl.ipc.pku.edu.cn>
chen> > 
chen> > chen>    I have already set the right network option when I run your 
chen> > chen> application. The hardware configuration of cluster is the following:
chen> > chen> cluster include 16 nodes, each node has two ethernet card(3C905B) and
chen> > chen> connect two 24-ports switch(two ethernet card in one node connect 
chen> > chen> different switch).
chen> > chen>    The scorehost.db file is in the attachment. 
chen> > chen> 
chen> > chen> On Sun, 19 May 2002, Shinji Sumimoto wrote:
chen> > chen> 
chen> > chen> > Hi.
chen> > chen> > 
chen> > chen> > Have you set the network option when you run your application?
chen> > chen> > 
chen> > chen> > As described in the document
chen> > chen> > (http://www.pccluster.org/score/dist/score/html/en/reference/pm/ether-trunking.html),
chen> > chen> > you need to set network name, such as ethernet-x2, ethernet-x3, in
chen> > chen> > order to use network trunking.
chen> > chen> > 
chen> > chen> > This is also needed when you try to run your application program:
chen> > chen> > 
chen> > chen> > For example, 
chen> > chen> > 
chen> > chen> > % scrun -nodes=4x1,network=ethernet-x2 ./a.out
chen> > chen> > 
chen> > chen> > The scrun command option is described in 
chen> > chen> > http://www.pccluster.org/score/dist/score/html/en/man/man1/scrun.html.
chen> > chen> > 
chen> > chen> > If you have already done, please let us know more information, such as
chen> > chen> > your cluster hardware configuration, such as scorehoss.db,
chen> > chen> > configuration file setting.
chen> > chen> > 
chen> > chen> > Shinji.
chen> > chen> > 
chen> > chen> > From: Chen Hao <chen ＠ mdl.ipc.pku.edu.cn>
chen> > chen> > Subject: [SCore-users] Network Trunking
chen> > chen> > Date: Sat, 18 May 2002 00:33:07 +0800 (CST)
chen> > chen> > 
chen> > chen> > >     I build a small cluster with score 5.0 in my lab, and I install two 
chen> > chen> > > ethernet card(3c905B) in one node. But after I complete configuration 
chen> > chen> > > following by the documents, I found there's no differences between 2 NICs 
chen> > chen> > > trunking network and single network because there is always only one NIC 
chen> > chen> > > works. what's the matter?
chen> > chen> > > 
chen> > chen> > > _______________________________________________
chen> > chen> > > SCore-users mailing list
chen> > chen> > > SCore-users ＠ pccluster.org
chen> > chen> > > http://www.pccluster.org/mailman/listinfo/score-users
chen> > chen> > > 
chen> > chen> > -----
chen> > chen> > Shinji Sumimoto    E-Mail: s-sumi ＠ bd6.so-net.ne.jp
chen> > chen> > 
chen> > ------
chen> > Shinji Sumimoto, Fujitsu Labs
chen> > _______________________________________________
chen> > SCore-users mailing list
chen> > SCore-users ＠ pccluster.org
chen> > http://www.pccluster.org/mailman/listinfo/score-users
chen> > 
chen> 
chen> _______________________________________________
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------
Shinji Sumimoto, Fujitsu Labs
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