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<?xml version="1.0" encoding="EUC-KR" ?>
<!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.ko.xsl"?>
<!-- English revision: 1.12.2.2 -->
<modulesynopsis metafile="mod_cache.xml.meta">

<name>mod_cache</name>
<description>Content cache keyed to URIs.</description>
<status>Experimental</status>
<sourcefile>mod_cache.c</sourcefile>
<identifier>cache_module</identifier>

<summary>
    <note type="warning">
      ÀÌ ¸ðµâÀº ½ÇÇèÀûÀÎ »óÅÂÀÌ´Ù. ¹®¼­´Â ¾ÆÁ÷ ÀÛ¾÷ÁßÀÌ´Ù...
    </note>

    <p><module>mod_cache</module>´Â °°Àº ÄÄÇ»ÅÍ¿¡ ÀÖ´Â ³»¿ëÀ̳ª
    ÇÁ·Ï½ÃµÈ ³»¿ëÀ» ij½¬ÇÒ ¼ö ÀÖ´Â <a
    href="http://www.ietf.org/rfc/rfc2616.txt">RFC 2616</a>
    ȣȯ HTTP ³»¿ëij½¬¸¦ ±¸ÇöÇÑ´Ù. <module>mod_cache</module>¸¦
    »ç¿ëÇÏ·Á¸é ÀúÀå°ü¸®¸ðµâ(storage management module)ÀÌ ÇÊ¿äÇÏ´Ù.
    ±âº» ¾ÆÆÄÄ¡ ¹èÆ÷º»¿¡´Â µÎ°¡Áö ÀúÀå°ü¸®¸ðµâÀÌ ÀÖ´Ù:</p>
    <dl>
    <dt><module>mod_disk_cache</module></dt>
    <dd>´Â µð½ºÅ©±â¹Ý ÀúÀå°ü¸®ÀÚ¸¦ ±¸ÇöÇÑ´Ù.</dd>

    <dt><module>mod_mem_cache</module></dt>
    <dd>´Â ¸Þ¸ð¸®±â¹Ý ÀúÀå°ü¸®ÀÚ¸¦ ±¸ÇöÇÑ´Ù.
    <module>mod_mem_cache</module>´Â ÆÄÀϱâ¼úÀÚ¸¦ ij½¬Çϰųª
    Èü(heap) °ø°£¿¡ °´Ã¼¸¦ ij½¬ÇÏ´Â µÎ°¡Áö ¹æ½ÄÁß ÇÑ°¡Áö ¹æ¹ýÀ¸·Î
    µ¿ÀÛÇϵµ·Ï ¼³Á¤ÇÒ ¼ö ÀÖ´Ù. <module>mod_mem_cache</module>´Â
    ÀÚ½ÅÀÌ »ý¼ºÇÑ ³»¿ëÀ» ij½¬Çϰųª, (<dfn>¿ªÇÁ·Ï½Ã(reverse proxy)</dfn>·Î
    ¾Ë·ÁÁø) <directive module="mod_proxy">ProxyPass</directive>¸¦
    »ç¿ëÇÏ¿© <module>mod_proxy</module>¸¦ À§ÇØ µÞ´Ü ¼­¹ö³»¿ëÀ»
    ij½¬ÇÒ ¼ö ÀÖ´Ù.</dd>
    </dl>

    <p>³»¿ëÀ» URI¸¦ Åä´ë·Î ¸¸µç Å°·Î ij½¬¿¡ ÀúÀåÇÏ°í °¡Á®¿Â´Ù.
    Á¢±Ùº¸È£°¡ µÈ ³»¿ëÀº ij½¬ÇÏÁö¾Ê´Â´Ù.</p>
</summary>

<section id="related"><title>°ü·ÃµÈ ¸ðµâ°ú Áö½Ã¾î</title>
    <related>
      <modulelist>
        <module>mod_disk_cache</module>
        <module>mod_mem_cache</module>
      </modulelist>
      <directivelist>
        <directive module="mod_disk_cache">CacheRoot</directive>
        <directive module="mod_disk_cache">CacheSize</directive>
        <directive module="mod_disk_cache">CacheGcInterval</directive>
        <directive module="mod_disk_cache">CacheDirLevels</directive>
        <directive module="mod_disk_cache">CacheDirLength</directive>
        <directive module="mod_disk_cache">CacheExpiryCheck</directive>
        <directive module="mod_disk_cache">CacheMinFileSize</directive>
        <directive module="mod_disk_cache">CacheMaxFileSize</directive>
        <directive module="mod_disk_cache">CacheTimeMargin</directive>
        <directive module="mod_disk_cache">CacheGcDaily</directive>
        <directive module="mod_disk_cache">CacheGcUnused</directive>
        <directive module="mod_disk_cache">CacheGcClean</directive>
        <directive module="mod_disk_cache">CacheGcMemUsage</directive>
        <directive module="mod_mem_cache">MCacheSize</directive>
        <directive module="mod_mem_cache">MCacheMaxObjectCount</directive>
        <directive module="mod_mem_cache">MCacheMinObjectSize</directive>
        <directive module="mod_mem_cache">MCacheMaxObjectSize</directive>
        <directive module="mod_mem_cache">MCacheRemovalAlgorithm</directive>
        <directive module="mod_mem_cache">MCacheMaxStreamingBuffer</directive>
      </directivelist>
    </related>
</section>

<section id="sampleconf"><title>¼³Á¤¿¹</title>
    <example><title>Sample httpd.conf</title>
      #<br />
      # ¿¹Á¦ ij½¬ ¼³Á¤<br />
      #<br />
      LoadModule cache_module modules/mod_cache.so<br />
      <br />
      &lt;IfModule mod_cache.c&gt;<br />
      <indent>
        #LoadModule disk_cache_module modules/mod_disk_cache.so<br />
        &lt;IfModule mod_disk_cache.c&gt;<br />
        <indent>
          CacheRoot c:/cacheroot<br />
          CacheSize 256<br />
          CacheEnable disk  /<br />
          CacheDirLevels 5<br />
          CacheDirLength 3<br />
        </indent>
        &lt;/IfModule&gt; <br />
        <br />
        LoadModule mem_cache_module modules/mod_mem_cache.so<br />
        &lt;IfModule mod_mem_cache.c&gt;<br />
        <indent>
          CacheEnable mem  /<br />
          MCacheSize 4096<br />
          MCacheMaxObjectCount 100<br />
          MCacheMinObjectSize 1<br />
          MCacheMaxObjectSize 2048<br />
        </indent>
        &lt;/IfModule&gt;<br />
      </indent>
      &lt;/IfModule&gt;
    </example>
</section>

<directivesynopsis>
<name>CacheEnable</name>
<description>ÁöÁ¤ÇÑ ÀúÀå°ü¸®ÀÚ¸¦ »ç¿ëÇÏ¿© ÁöÁ¤ÇÑ URLÀ» ij½¬ÇÑ´Ù</description>
<syntax>CacheEnable <var>cache_type</var> <var>url-string</var></syntax>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>

<usage>
    <p><directive>CacheEnable</directive> Áö½Ã¾î¸¦ »ç¿ëÇϸé
    <module>mod_cache</module>°¡ <var>url-string</var> ÀÌÇÏ
    urlµéÀ» ij½¬ÇÑ´Ù. ij½¬ ÀúÀå°ü¸®ÀÚ´Â <var>cache_type</var>
    ¾Æ±Ô¸ÕÆ®·Î ÁöÁ¤ÇÑ´Ù. <var>cache_type</var> <code>mem</code>Àº
    <module>mod_mem_cache</module>°¡ ±¸ÇöÇÏ´Â ¸Þ¸ð¸®±â¹Ý
    ÀúÀå°ü¸®ÀÚ¸¦ »ç¿ëÇÑ´Ù. <var>cache_type</var> <code>disk</code>´Â
    <module>mod_disk_cache</module>°¡ ±¸ÇöÇÏ´Â µð½ºÅ©±â¹Ý
    ÀúÀå°ü¸®ÀÚ¸¦ »ç¿ëÇÑ´Ù. <var>cache_type</var> <code>fd</code>´Â
    <module>mod_mem_cache</module>°¡ ±¸ÇöÇÏ´Â ÆÄÀϱâ¼úÀÚ Ä³½¬¸¦
    »ç¿ëÇÑ´Ù.</p>
    <p>(¾Æ·¡ ¿¹¿Í °°ÀÌ) URL °ø°£ÀÌ ´Ù¸¥
    <directive>CacheEnable</directive> Áö½Ã¾î¿Í °ãÄ¡¸é ½ÇÁ¦·Î
    ÇÑ ÀúÀå°ü¸®ÀÚ°¡ ¿äûÀ» ó¸®ÇÒ¶§±îÁö µÎ ÀúÀå°ü¸®ÀÚ¸¦ ¸ðµÎ
    ½ÇÇàÇÑ´Ù. ¼³Á¤ÆÄÀÏ¿¡¼­ <directive>CacheEnable</directive>
    Áö½Ã¾îÀÇ ¼ø¼­´ë·Î ÀúÀå°ü¸®ÀÚ°¡ ½ÇÇàµÈ´Ù.</p>

    <example>
      CacheEnable  mem   /manual<br />
      CacheEnable  fd    /images<br />
      CacheEnable  disk  /<br />
    </example>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>CacheDisable</name>
<description>ƯÁ¤ URLÀ» ij½¬ÇÏÁö ¾Ê´Â´Ù</description>
<syntax>CacheDisable <var> url-string</var></syntax>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>

<usage>
    <p><directive>CacheDisable</directive> Áö½Ã¾î¸¦ »ç¿ëÇϸé
    <module>mod_cache</module>°¡ <var>url-string</var> ÀÌÇÏÀÇ
    urlµéÀ» ij½¬ÇÏÁö <em>¾Ê´Â´Ù</em>.</p>

    <example><title>¿¹Á¦</title>
      CacheDisable /local_files
    </example>
</usage>

</directivesynopsis>
<directivesynopsis>
<name>CacheMaxExpire</name>
<description>¹®¼­¸¦ ij½¬ÇÏ´Â ÃÊ´ÜÀ§ ÃÖ´ë½Ã°£</description>
<syntax>CacheMaxExpire <var>seconds</var></syntax>
<default>CacheMaxExpire 86400 (ÇÏ·ç)</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>

<usage>
    <p><directive>CacheMaxExpire</directive> Áö½Ã¾î´Â ½ÇÁ¦ ¼­¹ö¸¦
    °Ë»çÇÏÁö¾Ê°í ij½¬°¡´ÉÇÑ HTTP ¹®¼­¸¦ À¯ÁöÇÒ ¼ö ÀÖ´Â ÃÊ´ÜÀ§
    ÃÖ´ë½Ã°£À» ÁöÁ¤ÇÑ´Ù. Áï, ¹®¼­´Â ÃÖ´ëÇÑ ÀÌ ¼³Á¤°ª¸¸Å­ ¿À·¡µÇ¾ú´Ù.
    ¹®¼­°¡ ¸¸±â½Ã°£À» ÁöÁ¤ÇÏ¿©µµ ÀÌ ÃÖ´ë°ªÀ» ÁöŲ´Ù.</p>

    <example>
      CacheMaxExpire 604800
    </example>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>CacheDefaultExpire</name>
<description>¸¸±â½Ã°£À» ÁöÁ¤ÇÏÁö¾ÊÀº ¹®¼­¸¦ ij½¬ÇÒ ±âº» ±â°£.</description>
<syntax>CacheDefaultExpire <var>seconds</var></syntax>
<default>CacheDefaultExpire 3600 (one hour)</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>

<usage>
    <p><directive>CacheDefaultExpire</directive> Áö½Ã¾î´Â ¹®¼­ÀÇ
    ¸¸±â½Ã°£°ú ÃÖ±Ù¼öÁ¤½Ã°£ÀÌ ¾ø´Â °æ¿ì ¹®¼­¸¦ ij½¬ÇÒ ÃÊ´ÜÀ§
    ±âº» ½Ã°£À» ÁöÁ¤ÇÑ´Ù. <directive>CacheMaxExpire</directive>·Î
    ÁöÁ¤ÇÑ °ªÀÌ ÀÌ ¼³Á¤À» ¹«½ÃÇÏÁö <em>¾Ê´Â´Ù</em>.</p>

    <example>
      CacheDefaultExpire 86400
    </example>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>CacheIgnoreNoLastMod</name>
<description>ÀÀ´ä¿¡ Last Modified Çì´õ°¡ ¾ø´Ù´Â »ç½ÇÀ» ¹«½ÃÇÑ´Ù.</description>
<syntax>CacheIgnoreNoLastMod On|Off</syntax>
<default>CacheIgnoreNoLastMod Off</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>

<usage>
    <p>º¸Åë ÃÖ±Ù¼öÁ¤ÀÏÀÌ ¾ø´Â ¹®¼­´Â ij½¬ÇÏÁö ¾Ê´Â´Ù. ¾î¶² °æ¿ì
    ÃÖ±Ù¼öÁ¤ÀÏÀ» (¿¹¸¦ µé¾î <module>mod_include</module> ó¸®Áß¿¡)
    »©°Å³ª óÀ½ºÎÅÍ ¾ø¾úÀ» ¼ö°¡ ÀÖ´Ù.
    <directive>CacheIgnoreNoLastMod</directive> Áö½Ã¾î´Â ÃÖ±Ù¼öÁ¤ÀÏÀÌ
    ¾ø´Â ¹®¼­µµ ¹Ýµå½Ã ij½¬Çϵµ·Ï ¸¸µç´Ù. ¹®¼­¿¡ ÃÖ±Ù¼öÁ¤ÀÏ°ú
    ¸¸±â½Ã°£ÀÌ ¾ø´Â °æ¿ì <directive>CacheDefaultExpire</directive>
    Áö½Ã¾î·Î ÁöÁ¤ÇÑ °ªÀ» ¸¸±â½Ã°£À¸·Î »ç¿ëÇÑ´Ù.</p>

    <example>
      CacheIgnoreNoLastMod On
    </example>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>CacheIgnoreCacheControl</name>
<description>Ŭ¶óÀ̾ðÆ®°¡ ij½¬ÇÏÁö¾Ê´Â ³»¿ëÀ» ¿äûÇÔÀ» ¹«½ÃÇÑ´Ù.</description>
<syntax>CacheIgnoreCacheControl On|Off</syntax>
<default>CacheIgnoreCacheControl Off</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>

<usage>
    <p>º¸Åë no-cache³ª no-store Çì´õ°ªÀ» °¡Áø ¹®¼­´Â ij½¬¿¡
    ÀúÀåÇÏÁö¾Ê´Â´Ù. <directive>CacheIgnoreCacheControl</directive>
    Áö½Ã¾î´Â ÀÌ·± ÇൿÀ» º¯°æÇÑ´Ù.
    <directive>CacheIgnoreCacheControl</directive> OnÀ» »ç¿ëÇϸé
    ¼­¹ö´Â ¹®¼­¿¡ no-cache³ª no-store Çì´õ°ªÀÌ À־ ¹®¼­¸¦
    ij½¬ÇÑ´Ù. ÀÎÁõÀÌ ÇÊ¿äÇÑ ¹®¼­´Â <em>Àý´ë·Î</em> ij½¬ÇÏÁö
    ¾Ê´Â´Ù.</p>

    <example>
      CacheIgnoreCacheControl On
    </example>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>CacheLastModifiedFactor</name>
<description>LastModified ½Ã°£À¸·Î ¸¸±â½Ã°£À» °è»êÇϴµ¥ »ç¿ëÇÏ´Â
°è¼ö.</description>
<syntax>CacheLastModifiedFactor <var>float</var></syntax>
<default>CacheLastModifiedFactor 0.1</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>

<usage>
    <p>¹®¼­¿¡ ¸¸±â½Ã°£Àº ¾øÁö¸¸ ÃÖ±Ù¼öÁ¤ÀÏÀÌ ÀÖ´Â °æ¿ì ÃÖ±Ù¼öÁ¤ÀÏ
    ÀÌÈÄ Áö³­ ½Ã°£À¸·Î ¸¸±â½Ã°£À» °è»êÇÑ´Ù.
    <directive>CacheLastModifiedFactor</directive> Áö½Ã¾î´Â
    ¸¸±â½Ã°£À» °è»êÇÏ´Â ´ÙÀ½ °ø½Ä¿¡¼­ »ç¿ëÇÒ <var>factor</var>¸¦
    ÁöÁ¤ÇÑ´Ù:

    <code>expiry-period = time-since-last-modified-date * <var>factor</var>
    expiry-date = current-date + expiry-period</code>

    ¿¹¸¦ µé¾î, ¹®¼­°¡ 10 ½Ã°£ Àü¿¡ ¸¶Áö¸·À¸·Î ¼öÁ¤µÇ¾ú°í <var>factor</var>°¡
    0.1À̶ó¸é ¸¸±â±â°£Àº 10*01 = 1 ½Ã°£ÀÌ µÈ´Ù. ÇöÀç ½Ã°£ÀÌ
    3:00pmÀ̶ó¸é ¸¸±â½Ã°£Àº 3:00pm + 1½Ã°£ = 4:00pmÀÌ´Ù.

    ¸¸±â±â°£ÀÌ <directive>CacheMaxExpire</directive> º¸´Ù ±æ´Ù¸é
    <directive>CacheMaxExpire</directive>¸¦ »ç¿ëÇÑ´Ù.</p>

    <example>
      CacheLastModifiedFactor 0.5
    </example>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>CacheForceCompletion</name>
<description>¿äûÀÌ Ãë¼ÒµÇ´õ¶óµµ ¼­¹ö°¡ ÆÄÀÏÀ» °è¼Ó ij½¬ÇϱâÀ§ÇØ
ÇÊ¿äÇÑ ¹®¼­ÀÇ ¼­ºñ½º·ü.</description>
<syntax>CacheForceCompletion <var>Percentage</var></syntax>
<default>CacheForceCompletion 60</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>

<usage>
    <p>º¸Åë ÀÀ´äÀ» ij½¬ÇÏ°í Ŭ¶óÀ̾ðÆ®·Î º¸³»´Â µµÁß¿¡ ¿äûÀÌ
    Ãë¼ÒµÇ¸é ÀÀ´ä 󸮸¦ Áߴܵǰí ij½¬ Ç׸ñÀ» Áö¿î´Ù.
    <directive>CacheForceCompletion</directive> Áö½Ã¾î´Â ¿äûÀÌ
    Ãë¼ÒµÇ´õ¶óµµ ¹®¼­¸¦ °è¼Ó ij½¬ÇÒ Á¤µµ¸¦ ÁöÁ¤ÇÑ´Ù.</p>

    <p>Á¤µµ´Â ¹éºÐÀ²·Î ³ªÅ¸³»¸ç <code>1</code>°ú <code>100</code>
    »çÀÌÀÇ °ªÀÌ´Ù. <code>0</code> °ªÀ» ÁöÁ¤ÇÏ¸é ±âº»°ªÀ» »ç¿ëÇÑ´Ù.
    <code>100</code>Àº ³»¿ëÀ» ¸ðµÎ ¼­ºñ½ºÇÑ ¹®¼­¸¸À» ij½¬ÇÑ´Ù.
    60°ú 90 »çÀÌÀÇ °ªÀ» ÃßõÇÑ´Ù.</p>

    <example>
      CacheForceCompletion 80
    </example>

    <note type="warning"><title>ÁÖÀÇ:</title>
      ÀÌ ±â´ÉÀº ÇöÀç ±¸ÇöµÇÁö <em>¾Ê¾Ò´Ù</em>.
    </note>
</usage>
</directivesynopsis>

</modulesynopsis>