-<?xml version='1.0' encoding='UTF-8'?><chapter xmlns="http://docbook.org/ns/docbook" xmlns:xl="http://www.w3.org/1999/xlink" version="5.0" xml:lang="en-US" xml:id="benchmarkingtests">
+<?xml version='1.0' encoding='UTF-8'?>
+<chapter xmlns="http://docbook.org/ns/docbook"
+ xmlns:xl="http://www.w3.org/1999/xlink" version="5.0" xml:lang="en-US"
+ xml:id="benchmarkingtests">
<title xml:id="benchmarkingtests.title">Benchmarking Lustre File System Performance (Lustre I/O
Kit)</title>
<para>This chapter describes the Lustre I/O kit, a collection of I/O
<para>Download the Lustre I/O kit (<literal>lustre-iokit</literal>)from:
</para>
<para>
- <link xl:href="http://downloads.whamcloud.com/">http://downloads.whamcloud.com/</link>
+ <link xl:href="https://downloads.whamcloud.com/">https://downloads.whamcloud.com/</link>
</para>
</section>
</section>
<screen>$ nobjhi=2 thrhi=2 size=1024 case=disk sh obdfilter-survey</screen>
</listitem>
<listitem>
- <para>Performance measurements for write, rewrite, read etc are
+ <para>Performance measurements for write, rewrite, read etc are
provided below:</para>
- <screen># example output
+ <screen># example output
Fri Sep 25 11:14:03 EDT 2015 Obdfilter-survey for case=disk from hds1fnb6123
ost 10 sz 167772160K rsz 1024K obj 10 thr 10 write 10982.73 [ 601.97,2912.91] rewrite 15696.54 [1160.92,3450.85] read 12358.60 [ 938.96,2634.87]
...</screen>
- <para>The file
+ <para>The file
<literal>./lustre-iokit/obdfilter-survey/README.obdfilter-survey
</literal>provides an explaination for the output as follows:</para>
- <screen>ost 10 is the total number of OSTs under test.
+ <screen>ost 10 is the total number of OSTs under test.
sz 167772160K is the total amount of data read or written (in bytes).
rsz 1024K is the record size (size of each echo_client I/O, in bytes).
obj 10 is the total number of objects over all OSTs
(<literal>nobjhi</literal>), up to two threads (
<literal>thrhi</literal>), and 1024 Mb (size) transfer size:</para>
<screen>$ nobjhi=2 thrhi=2 size=1024 targets="lustre-OST0001 \
- lustre-OST0002" sh obdfilter-survey</screen>
+ lustre-OST0002" sh obdfilter-survey</screen>
</listitem>
</orderedlist>
</section>
<literal>targets=<replaceable>hostname|ip_of_server</replaceable>
</literal>. For example:</para>
<screen>$ nobjhi=2 thrhi=2 size=1024 targets="oss0 oss1" \
- case=network sh obdfilter-survey</screen>
+ case=network sh obdfilter-survey</screen>
</listitem>
<listitem>
<para>On the server side, view the statistics at:</para>
<title><indexterm><primary>benchmarking</primary>
<secondary>MDS performance</secondary></indexterm>
Testing MDS Performance (<literal>mds-survey</literal>)</title>
- <para><literal>mds-survey</literal> is available in Lustre software release
- 2.2 and beyond. The <literal>mds-survey</literal> script tests the local
- metadata performance using the echo_client to drive different layers of the
- MDS stack: mdd, mdt, osd (the Lustre software only supports mdd stack). It
- can be used with the following classes of operations:</para>
+ <para>The <literal>mds-survey</literal> script tests the local
+ metadata performance using the <literal>echo_client</literal> to
+ drive the MDD layer of the MDS stack.
+ It can be used with the following classes of operations:</para>
<itemizedlist>
<listitem>
<para><literal>Open-create/mkdir/create</literal></para>
</orderedlist>
</section>
</section>
-</chapter>
\ No newline at end of file
+</chapter>
+<!--
+ vim:expandtab:shiftwidth=2:tabstop=8:
+ -->