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r134 r158 1 1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 33. Handling Large Directories</title><link rel="stylesheet" href="../samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"><link rel="start" href="index.html" title="The Official Samba 3.2.x HOWTO and Reference Guide"><link rel="up" href="optional.html" title="Part III. Advanced Configuration"><link rel="prev" href="SambaHA.html" title="Chapter 32. High Availability"><link rel="next" href="cfgsmarts.html" title="Chapter 34. Advanced Configuration Techniques"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 33. Handling Large Directories</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="SambaHA.html">Prev</a> </td><th width="60%" align="center">Part III. Advanced Configuration</th><td width="20%" align="right"> <a accesskey="n" href="cfgsmarts.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="largefile"></a>Chapter 33. Handling Large Directories</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Jeremy</span> <span class="surname">Allison</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jra@samba.org">jra@samba.org</a>></code></p></div></div></div></div><div><div class="author"><h3 class="author"><span class="firstname">John</span> <span class="othername">H.</span> <span class="surname">Terpstra</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jht@samba.org">jht@samba.org</a>></code></p></div></div></div></div><div><p class="pubdate">March 5, 2005</p></div></div></div><p> 2 <a class="indexterm" name="id4 53428"></a>3 <a class="indexterm" name="id4 53434"></a>4 <a class="indexterm" name="id4 53441"></a>2 <a class="indexterm" name="id427682"></a> 3 <a class="indexterm" name="id427689"></a> 4 <a class="indexterm" name="id427695"></a> 5 5 Samba-3.0.12 and later implements a solution for sites that have experienced performance degradation due to the 6 6 problem of using Samba-3 with applications that need large numbers of files (100,000 or more) per directory. 7 7 </p><p> 8 <a class="indexterm" name="id4 53453"></a>9 <a class="indexterm" name="id4 53460"></a>8 <a class="indexterm" name="id427707"></a> 9 <a class="indexterm" name="id427714"></a> 10 10 The key was fixing the directory handling to read only the current list requested instead of the old 11 11 (up to samba-3.0.11) behavior of reading the entire directory into memory before doling out names. … … 13 13 stealing logic from Samba4 (thanks, Tridge), the current code in 3.0.12 handles this correctly. 14 14 </p><p> 15 <a class="indexterm" name="id4 53474"></a>16 <a class="indexterm" name="id4 53481"></a>15 <a class="indexterm" name="id427728"></a> 16 <a class="indexterm" name="id427735"></a> 17 17 To set up an application that needs large numbers of files per directory in a way that does not 18 18 damage performance unduly, follow these steps: 19 19 </p><p> 20 <a class="indexterm" name="id4 53492"></a>20 <a class="indexterm" name="id427746"></a> 21 21 First, you need to canonicalize all the files in the directory to have one case, upper or lower take your 22 22 pick (I chose upper because all my files were already uppercase names). Then set up a new custom share for the 23 23 application as follows: 24 </p><table class="simplelist" border="0" summary="Simple list"><tr><td> </td></tr><tr><td><em class="parameter"><code>[bigshare]</code></em></td></tr><tr><td><a class="indexterm" name="id4 53518"></a><em class="parameter"><code>path = /data/manyfilesdir</code></em></td></tr><tr><td><a class="indexterm" name="id453529"></a><em class="parameter"><code>read only = no</code></em></td></tr><tr><td><a class="indexterm" name="id453541"></a><em class="parameter"><code>case sensitive = True</code></em></td></tr><tr><td><a class="indexterm" name="id453552"></a><em class="parameter"><code>default case = upper</code></em></td></tr><tr><td><a class="indexterm" name="id453564"></a><em class="parameter"><code>preserve case = no</code></em></td></tr><tr><td><a class="indexterm" name="id453575"></a><em class="parameter"><code>short preserve case = no</code></em></td></tr></table><p>24 </p><table class="simplelist" border="0" summary="Simple list"><tr><td> </td></tr><tr><td><em class="parameter"><code>[bigshare]</code></em></td></tr><tr><td><a class="indexterm" name="id427772"></a><em class="parameter"><code>path = /data/manyfilesdir</code></em></td></tr><tr><td><a class="indexterm" name="id427784"></a><em class="parameter"><code>read only = no</code></em></td></tr><tr><td><a class="indexterm" name="id427795"></a><em class="parameter"><code>case sensitive = True</code></em></td></tr><tr><td><a class="indexterm" name="id427806"></a><em class="parameter"><code>default case = upper</code></em></td></tr><tr><td><a class="indexterm" name="id427818"></a><em class="parameter"><code>preserve case = no</code></em></td></tr><tr><td><a class="indexterm" name="id427829"></a><em class="parameter"><code>short preserve case = no</code></em></td></tr></table><p> 25 25 </p><p> 26 <a class="indexterm" name="id4 53590"></a>27 <a class="indexterm" name="id4 53597"></a>28 <a class="indexterm" name="id4 53604"></a>26 <a class="indexterm" name="id427844"></a> 27 <a class="indexterm" name="id427851"></a> 28 <a class="indexterm" name="id427858"></a> 29 29 Of course, use your own path and settings, but set the case options to match the case of all the files in your 30 30 directory. The path should point at the large directory needed for the application any new files created in … … 32 32 the directory for names: it knows that if a file does not exist in uppercase, then it doesn't exist at all. 33 33 </p><p> 34 <a class="indexterm" name="id4 53621"></a>35 <a class="indexterm" name="id4 53627"></a>36 <a class="indexterm" name="id4 53634"></a>34 <a class="indexterm" name="id427875"></a> 35 <a class="indexterm" name="id427881"></a> 36 <a class="indexterm" name="id427888"></a> 37 37 The secret to this is really in the <a class="link" href="smb.conf.5.html#CASESENSITIVE">case sensitive = True</a> 38 38 line. This tells smbd never to scan for case-insensitive versions of names. So if an application asks for a file … … 42 42 <span class="application">smbd</span>. 43 43 </p><p> 44 <a class="indexterm" name="id4 53675"></a>45 <a class="indexterm" name="id4 53682"></a>46 <a class="indexterm" name="id4 53688"></a>44 <a class="indexterm" name="id427929"></a> 45 <a class="indexterm" name="id427936"></a> 46 <a class="indexterm" name="id427943"></a> 47 47 Remember, all files and directories under the <em class="parameter"><code>path</code></em> directory must be in uppercase 48 48 with this <code class="filename">smb.conf</code> stanza because <span class="application">smbd</span> will not be able to find lowercase filenames with these settings. Also
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