[Lustre-discuss] Help

[Andreas Dilger]

On 2010-12-13, at 18:35, Nihir Parikh wrote:
> Hello Wang Yibin,
> Can I please get step by step information on how to run lnet_selftest? 

This is described in the Lustre manual.

> 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
> 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 à S3 and S3 à 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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Cheers, Andreas
--
Andreas Dilger
Lustre Technical Lead
Oracle Corporation Canada Inc.