[Lustre-discuss] Help

Sheila Barthel sheila.barthel at oracle.com
Tue Dec 14 05:12:50 PST 2010


LNET self-test is discussed in the Lustre manual:

http://wiki.lustre.org/manual/LustreManual18_HTML/LustreIOKit.html#50651262_pgfId-1290255

On 12/13/2010 6:35 PM, Nihir Parikh wrote:
>
> 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 S2a`S3 and S3a`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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