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branches/samba-3.2.x/docs/htmldocs/Samba3-HOWTO/largefile.html
r231 r272 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 V1.74.0"><link rel="home" 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="orgname">Samba Team</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="orgname">Samba Team</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="id26733 51"></a>3 <a class="indexterm" name="id26733 58"></a>4 <a class="indexterm" name="id2673 365"></a>2 <a class="indexterm" name="id2673388"></a> 3 <a class="indexterm" name="id2673396"></a> 4 <a class="indexterm" name="id2673403"></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="id2673 379"></a>9 <a class="indexterm" name="id2673 386"></a>8 <a class="indexterm" name="id2673417"></a> 9 <a class="indexterm" name="id2673424"></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="id26734 04"></a>16 <a class="indexterm" name="id26734 10"></a>15 <a class="indexterm" name="id2673441"></a> 16 <a class="indexterm" name="id2673448"></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="id26734 23"></a>20 <a class="indexterm" name="id2673460"></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="id26734 51"></a><em class="parameter"><code>path = /data/manyfilesdir</code></em></td></tr><tr><td><a class="indexterm" name="id2673463"></a><em class="parameter"><code>read only = no</code></em></td></tr><tr><td><a class="indexterm" name="id2673474"></a><em class="parameter"><code>case sensitive = True</code></em></td></tr><tr><td><a class="indexterm" name="id2673486"></a><em class="parameter"><code>default case = upper</code></em></td></tr><tr><td><a class="indexterm" name="id2673498"></a><em class="parameter"><code>preserve case = no</code></em></td></tr><tr><td><a class="indexterm" name="id2673510"></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="id2673488"></a><em class="parameter"><code>path = /data/manyfilesdir</code></em></td></tr><tr><td><a class="indexterm" name="id2673500"></a><em class="parameter"><code>read only = no</code></em></td></tr><tr><td><a class="indexterm" name="id2673512"></a><em class="parameter"><code>case sensitive = True</code></em></td></tr><tr><td><a class="indexterm" name="id2673524"></a><em class="parameter"><code>default case = upper</code></em></td></tr><tr><td><a class="indexterm" name="id2673535"></a><em class="parameter"><code>preserve case = no</code></em></td></tr><tr><td><a class="indexterm" name="id2673547"></a><em class="parameter"><code>short preserve case = no</code></em></td></tr></table><p> 25 25 </p><p> 26 <a class="indexterm" name="id26735 25"></a>27 <a class="indexterm" name="id26735 32"></a>28 <a class="indexterm" name="id26735 39"></a>26 <a class="indexterm" name="id2673562"></a> 27 <a class="indexterm" name="id2673569"></a> 28 <a class="indexterm" name="id2673576"></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="id26735 59"></a>35 <a class="indexterm" name="id2673 566"></a>36 <a class="indexterm" name="id2673 572"></a>34 <a class="indexterm" name="id2673596"></a> 35 <a class="indexterm" name="id2673603"></a> 36 <a class="indexterm" name="id2673610"></a> 37 37 The secret to this is really in the <a class="link" href="smb.conf.5.html#CASESENSITIVE" target="_top">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="id26736 19"></a>45 <a class="indexterm" name="id26736 26"></a>46 <a class="indexterm" name="id26736 33"></a>44 <a class="indexterm" name="id2673656"></a> 45 <a class="indexterm" name="id2673663"></a> 46 <a class="indexterm" name="id2673670"></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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