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Last change
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Samba Server: update vendor to version 4.4.3
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| 1 | <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>ping_pong</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry"><a name="ping_pong.1"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ping_pong — measures the ping-pong byte range lock latency</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">ping_pong</code> { -r | -w | -rw } [-m] [-c] {<em class="replaceable"><code>FILENAME</code></em>} {<em class="replaceable"><code>NUM-LOCKS</code></em>}</p></div></div><div class="refsect1"><a name="idp52545920"></a><h2>DESCRIPTION</h2><p>
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| 2 | ping_pong measures the byte range lock latency. It is especially
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| 3 | useful on a cluster of nodes sharing a common lock manager as it
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| 4 | will give some indication of the lock manager's performance
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| 5 | under stress.
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| 6 | </p><p>
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| 7 | FILENAME is a file on shared storage to use for byte range
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| 8 | locking tests.
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| 9 | </p><p>
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| 10 | NUM-LOCKS is the number of byte range locks, so needs to be
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| 11 | (strictly) greater than the number of nodes in the cluster.
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| 12 | </p></div><div class="refsect1"><a name="idp51929904"></a><h2>OPTIONS</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term">-r</span></dt><dd><p>
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| 13 | test read performance
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| 14 | </p></dd><dt><span class="term">-w</span></dt><dd><p>
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| 15 | test write performance
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| 16 | </p></dd><dt><span class="term">-m</span></dt><dd><p>
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| 17 | use mmap
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| 18 | </p></dd><dt><span class="term">-c</span></dt><dd><p>
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| 19 | validate the locks
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| 20 | </p></dd></dl></div></div><div class="refsect1"><a name="idp49227968"></a><h2>EXAMPLES</h2><p>
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| 21 | Testing lock coherence
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| 22 | </p><pre class="screen">
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| 23 | ping_pong test.dat N
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| 24 | </pre><p>
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| 25 | Testing lock coherence with lock validation
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| 26 | </p><pre class="screen">
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| 27 | ping_pong -c test.dat N
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| 28 | </pre><p>
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| 29 | Testing IO coherence
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| 30 | </p><pre class="screen">
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| 31 | ping_pong -rw test.dat N
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| 32 | </pre></div><div class="refsect1"><a name="idp53939216"></a><h2>SEE ALSO</h2><p>
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| 33 | <span class="citerefentry"><span class="refentrytitle">ctdb</span>(7)</span>,
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| 34 |
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| 35 | <a class="ulink" href="https://wiki.samba.org/index.php/Ping_pong" target="_top">https://wiki.samba.org/index.php/Ping_pong</a>
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| 36 |
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| 37 | </p></div></div></body></html>
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