[Lustre-discuss] Help

[Nihir Parikh]

Hello Wang Yibin,
Can I please get step by step information on how to run lnet_selftest?

Thanks
Nihir

________________________________
From: Wang Yibin [mailto:wang.yibin at oracle.com]
Sent: Sunday, November 21, 2010 6:12 PM
To: Nihir Parikh
Cc: lustre-discuss at lists.lustre.org
Subject: Re: [Lustre-discuss] Help


在 2010-11-20，上午8:39， Nihir Parikh 写道：


Hello Wang Yibin,
Thanks for getting back to me. Yes, S2 and S3 can ping each other using lctl ping.

This indicates that your routing is work as expected.


I was using nuttcp test and I also tried ib tests that comes with the IB utilities. I will lnet-selftest.

These utilities do not understand lnet protocol so they won't work.



My goal was to measure the bandwidth when it has to reach across different network. Are there any such tests specific to lustre?

Lnet has its own testsuite which is called lnet self-test.
To measure the bandwidth, you can load lnet_selftest module on your nodes and execute lst in brw mode.



Thanks
Nihir

________________________________
From: Wang Yibin [mailto:wang.yibin at oracle.com]
Sent: Thursday, November 18, 2010 6:32 AM
To: Nihir Parikh
Cc: lustre-discuss at lists.lustre.org<mailto:lustre-discuss at lists.lustre.org>
Subject: Re: [Lustre-discuss] Help

Hi,

在 2010-11-17，上午9:17， Nihir Parikh 写道：




Now my problem is to run some network tests from S2 --> S3 and S3 --> S2 to measure the bandwidth but somehow both S2 and S3 complain that network is unreachable. What am I doing wrong?

Your configuration seems OK to me. Can S2 and S3 ping each other using 'lctl ping'?
What kind of network test did you do? Note that only lustre LNET can do the routing.
There's a script in lustre testsuite that's specifically for testing the network connectivity - lnet-selftest.sh.




Thanks
Nihir

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