| <?xml version="1.0" encoding="EUC-KR" ?> |
| <!DOCTYPE manualpage SYSTEM "../style/manualpage.dtd"> |
| <?xml-stylesheet type="text/xsl" href="../style/manual.ko.xsl"?> |
| <!-- English Revision: 1.17 --> |
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| Copyright 2004 The Apache Software Foundation |
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| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
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| http://www.apache.org/licenses/LICENSE-2.0 |
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| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| |
| <manualpage metafile="perf-tuning.xml.meta"> |
| <parentdocument href="./">Miscellaneous Documentation</parentdocument> |
| |
| <title>¾ÆÆÄÄ¡ ¼º´ÉÇâ»ó</title> |
| |
| <summary> |
| |
| <p>¾ÆÆÄÄ¡ 2.0Àº ±â´É°ú Æ÷Æð¡´É¼º°ú ¼º´ÉÀÇ ±ÕÇüÀÌ ¸Âµµ·Ï |
| ¼³°èÇÑ ¹ü¿ë À¥¼¹öÀÌ´Ù. º¥Ä¡¸¶Å© ±â·ÏÀ» ¼¼¿ì±âÀ§ÇØ ¼³°èÇÏÁö |
| ¾Ê¾ÒÁö¸¸ ¾ÆÆÄÄ¡ 2.0Àº ½ÇÁ¦ ¸¹Àº °æ¿ì ³ôÀº ¼º´ÉÀ» ³½´Ù.</p> |
| |
| <p>¾ÆÆÄÄ¡ 1.3°ú ºñ±³Çؼ 2.0 ¹öÀüÀº 󸮷®°ú È®À强(scalability)À» |
| ³ôÀ̱âÀ§ÇØ ¸¹Àº ÃÖÀûȸ¦ Çß´Ù. ±âº»°ªÀ¸·Î ´ëºÎºÐ ÃÖÀûÈÇÑ |
| °ªÀ» »ç¿ëÇÑ´Ù. ±×·¯³ª ÄÄÆÄÀϽà ȤÀº ½ÇÇà½Ã ¼³Á¤ÀÌ ¼º´É¿¡ |
| Å« ¿µÇâÀ» ÁÙ ¼ö ÀÖ´Ù. ÀÌ ¹®¼´Â ¾ÆÆÄÄ¡ 2.0ÀÇ ¼º´ÉÀ» Çâ»óÇϱâÀ§ÇØ |
| ¼¹ö °ü¸®ÀÚ°¡ ¼³Á¤ÇÒ ¼ö ÀÖ´Â ¿É¼ÇÀ» ¼³¸íÇÑ´Ù. ¾î¶² ¼³Á¤ |
| ¿É¼ÇÀº À¥¼¹ö°¡ Çϵå¿þ¾î¿Í ¿î¿µÃ¼Á¦ÀÇ ±â´ÉÀ» ´õ Àß È°¿ëÇϵµ·Ï |
| ÇÏ´Â ¹Ý¸é, ¾î¶² ¿É¼ÇÀº ¼Óµµ¸¦ À§ÇØ ±â´ÉÀ» Èñ»ýÇÑ´Ù.</p> |
| |
| </summary> |
| |
| <section id="hardware"> |
| |
| <title>Çϵå¿þ¾î¿Í ¿î¿µÃ¼Á¦¿¡ ´ëÇؼ</title> |
| |
| <p>À¥¼¹ö ¼º´É¿¡ °¡Àå Å« ¿µÇâÀ» ÁÖ´Â °ÍÀº ¸Þ¸ð¸®´Ù. ½º¿ÒÀº |
| ¿äû´ç Áö¿¬½Ã°£À» »ç¿ëÀÚ°¡ "ÃæºÐÈ÷ ºü¸£´Ù°í" »ý°¢ÇÏÁö ¸øÇÏ°Ô |
| ´Ã¸®±â¶§¹®¿¡ À¥¼¹ö´Â ½º¿ÒÀ» ÇÏ¸é ¾ÈµÈ´Ù. ´À·ÁÁö¸é »ç¿ëÀÚ´Â |
| Á¤ÁöÇÏ°í ´Ù½Ã Á¢¼ÓÇÏ¿© ºÎÇÏ°¡ °è¼Ó Áõ°¡ÇÑ´Ù. <directive |
| module="mpm_common">MaxClients</directive> Áö½Ã¾î¸¦ Á¶ÀýÇÏ¿© |
| À¥¼¹ö°¡ ½º¿ÒÀ» ÇÒ Á¤µµ·Î ¸¹Àº ÀÚ½ÄÀ» ¸¸µéÁö¾Êµµ·Ï ÇØ¾ß |
| ÇÑ´Ù. ¹æ¹ýÀº °£´ÜÇÏ´Ù: <code>top</code>°ú °°Àº µµ±¸¿¡¼ |
| ÇÁ·Î¼¼½º ¸ñ·ÏÀ» º¸°í ¾ÆÆÄÄ¡ ÇÁ·Î¼¼½ºÀÇ Æò±Õ ¸Þ¸ð¸® »ç¿ë·®À» |
| ¾Ë¾Æ³½ÈÄ, Àüü »ç¿ë°¡´ÉÇÑ ¸Þ¸ð¸®¿¡¼ ´Ù¸¥ ÇÁ·Î¼¼½ºµéÀÌ »ç¿ëÇÒ |
| °ø°£À» »« °ª¿¡¼ ³ª´«´Ù.</p> |
| |
| <p>³ª¸ÓÁö´Â Æò¹üÇÏ´Ù: ÃæºÐÈ÷ ºü¸¥ CPU, ÃæºÐÈ÷ ºü¸¥ ³×Æ®¿÷Ä«µå, |
| ÃæºÐÈ÷ ºü¸¥ µð½ºÅ©, ¿©±â¼ "ÃæºÐÈ÷ ºü¸¥"Àº ½ÇÇèÀ» Çؼ °áÁ¤ÇØ¾ß |
| ÇÑ´Ù.</p> |
| |
| <p>¿î¿µÃ¼Á¦´Â º¸Åë °¢ÀÚ ¾Ë¾Æ¼ ¼±ÅÃÇÒ ÀÏÀÌ´Ù. ±×·¯³ª ÀϹÝÀûÀ¸·Î |
| À¯¿ëÇÏ´Ù°í ÆǸíµÈ ¸î°¡Áö ÁöħÀÌ ÀÖ´Ù:</p> |
| |
| <ul> |
| <li> |
| <p>¼±ÅÃÇÑ ¿î¿µÃ¼Á¦ÀÇ ÃֽŠ¾ÈÁ¤ ¹öÀü°ú ÆÐÄ¡¸¦ ½ÇÇàÇÑ´Ù. |
| ¸¹Àº ¿î¿µÃ¼Á¦ Á¦ÀÛ»ç´Â ÃÖ±Ù TCP ½ºÅðú ¾²·¹µå ¶óÀ̺귯¸®¿¡ |
| ¸¹Àº ¼ÓµµÇâ»óÀ» Çß´Ù.</p> |
| </li> |
| |
| <li> |
| <p>¿î¿µÃ¼Á¦°¡ <code>sendfile(2)</code> ½Ã½ºÅÛÈ£ÃâÀ» |
| Áö¿øÇÑ´Ù¸é, À̸¦ »ç¿ëÇϱâÀ§ÇÑ ¹öÀüÀ̳ª ÆÐÄ¡¸¦ ¼³Ä¡ÇÏ¿´´ÂÁö |
| È®ÀÎÇÑ´Ù. (¿¹¸¦ µé¾î, ¸®´ª½º¶ó¸é 2.4 ÀÌ»ó ¹öÀüÀ» ¶æÇÑ´Ù. |
| Solaris 8 Ãʱ⠹öÀüÀº ÆÐÄ¡°¡ ÇÊ¿äÇÏ´Ù.) Áö¿øÇÏ´Â ½Ã½ºÅÛÀ̶ó¸é |
| ¾ÆÆÄÄ¡ 2´Â <code>sendfile</code>À» »ç¿ëÇÏ¿© CPU¸¦ ´ú |
| »ç¿ëÇϸç Á¤Àû ÆÄÀÏÀ» ´õ »¡¸® Àü¼ÛÇÒ ¼ö ÀÕ´Ù.</p> |
| </li> |
| </ul> |
| |
| </section> |
| |
| <section id="runtime"> |
| |
| <title>½ÇÇà½Ã ¼³Á¤¿¡ ´ëÇؼ</title> |
| |
| <related> |
| <modulelist> |
| <module>mod_dir</module> |
| <module>mpm_common</module> |
| <module>mod_status</module> |
| </modulelist> |
| <directivelist> |
| <directive module="core">AllowOverride</directive> |
| <directive module="mod_dir">DirectoryIndex</directive> |
| <directive module="core">HostnameLookups</directive> |
| <directive module="core">EnableMMAP</directive> |
| <directive module="core">EnableSendfile</directive> |
| <directive module="core">KeepAliveTimeout</directive> |
| <directive module="prefork">MaxSpareServers</directive> |
| <directive module="prefork">MinSpareServers</directive> |
| <directive module="core">Options</directive> |
| <directive module="mpm_common">StartServers</directive> |
| </directivelist> |
| </related> |
| |
| <section id="dns"> |
| |
| <title>HostnameLookups¿Í DNS¿¡ ´ëÇØ °í·ÁÇÒ Á¡µé</title> |
| |
| <p>¾ÆÆÄÄ¡ 1.3 ÀÌÀü¿¡ <directive |
| module="core">HostnameLookups</directive>ÀÇ ±âº»°ªÀº |
| <code>On</code>ÀÌ¿´´Ù. ¿äûÀ» ¸¶Ä¡±âÀü¿¡ DNS °Ë»öÀÌ ³¡³ª¾ß |
| ÇϹǷΠ¿äû¸¶´Ù Áö¿¬ÀÌ »ý°å´Ù. ¾ÆÆÄÄ¡ 1.3¿¡¼ ÀÌ ¼³Á¤ÀÇ |
| ±âº»°ªÀÌ <code>Off</code>·Î º¯°æµÇ¾ú´Ù. ·Î±×ÆÄÀÏÀÇ ÁÖ¼Ò¸¦ |
| È£½ºÆ®¸íÀ¸·Î º¯È¯ÇÏ·Á¸é ¿©·¯ ·Î±×ó¸® ÇÁ·Î±×·¥Áß ÇϳªÀÎ, |
| ¾ÆÆÄÄ¡¿¡ Æ÷ÇÔµÈ <a |
| href="../programs/logresolve.html"><code>logresolve</code></a> |
| ÇÁ·Î±×·¥À» »ç¿ëÇ϶ó.</p> |
| |
| <p>·Î±×ó¸® ÀÛ¾÷ÀÌ ¼¹ö ¼º´É¿¡ ¾Ç¿µÇâÀ» ¹ÌÄ¡¹Ç·Î ½ÇÁ¦ |
| »ç¿ëÇÏ´Â À¥¼¹ö°¡ ¾Æ´Ñ ´Ù¸¥ ÄÄÇ»ÅÍ¿¡¼ ·Î±×ÆÄÀÏÀ» ÈÄó¸®Çϱæ |
| ¹Ù¶õ´Ù.</p> |
| |
| <p><code><directive module="mod_access">Allow</directive> |
| from domain</code>À̳ª <code><directive |
| module="mod_access">Deny</directive> from domain</code> |
| Áö½Ã¾î¸¦ »ç¿ëÇÑ´Ù¸é (Áï, IP ÁÖ¼Ò°¡ ¾Æ´Ñ È£½ºÆ®¸íÀ̳ª µµ¸ÞÀθíÀ» |
| »ç¿ëÇÑ´Ù¸é) ºÎµæÀÌ Áߺ¹-¿ª DNS °Ë»öÀ» (¿ª°Ë»öÀ» ÇÑÈÄ ¾ÇÀÇ·Î |
| º¯°æµÇ¾ú´ÂÁö È®ÀÎÇϱâÀ§ÇØ ´Ù½Ã °Ë»ö) ÇØ¾ß ÇÑ´Ù. ±×·¯¹Ç·Î |
| ¼º´ÉÀ» ³ôÀ̱âÀ§ÇØ ÀÌ·± Áö½Ã¾î¿¡´Â °¡´ÉÇϸé À̸§´ë½Å IP |
| ÁÖ¼Ò¸¦ »ç¿ëÇÑ´Ù.</p> |
| |
| <p><code><Location /server-status></code> ¼½¼Ç µîÀ¸·Î |
| Áö½Ã¾îÀÇ Àû¿ë¹üÀ§¸¦ Á¦ÇÑÇÒ ¼ö ÀÖÀ½À» ±â¾ïÇ϶ó. ÀÌ °æ¿ì |
| Á¶°Ç¿¡ ¸Â´Â ¿äû¿¡¸¸ DNS Á¶È¸¸¦ ÇÑ´Ù. ´ÙÀ½Àº |
| <code>.html</code>°ú <code>.cgi</code> ÆÄÀϸ¸ DNS °Ë»öÀ» |
| ÇÏ´Â ¿¹Á¦´Ù:</p> |
| |
| <example> |
| HostnameLookups off<br /> |
| <Files ~ "\.(html|cgi)$"><br /> |
| <indent> |
| HostnameLookups on<br /> |
| </indent> |
| </Files> |
| </example> |
| |
| <p>±×·¯³ª CGI¿¡¼ DNS¸íÀÌ ÇÊ¿äÇÒ »ÓÀ̶ó¸é, ÇÊ¿äÇÑ Æ¯Á¤ |
| CGI¿¡¼¸¸ <code>gethostbyname</code> È£ÃâÀ» Çϵµ·Ï °í·ÁÇغ¼ |
| ¼ö ÀÖ´Ù.</p> |
| |
| </section> |
| |
| <section id="symlinks"> |
| |
| <title>FollowSymLinks¿Í SymLinksIfOwnerMatch</title> |
| |
| <p>URL °ø°£¿¡¼ <code>Options FollowSymLinks</code>¸¦ |
| »ç¿ëÇÏÁö¾Ê°í <code>Options SymLinksIfOwnerMatch</code>¸¦ |
| »ç¿ëÇÏ¸é ¾ÆÆÄÄ¡´Â ½Éº¼¸µÅ©¸¦ °Ë»çÇϱâÀ§ÇØ ½Ã½ºÅÛÈ£ÃâÀ» |
| Çѹø ´õ ÇØ¾ß ÇÑ´Ù. ÆÄÀϸíÀÇ °¢ ºÎºÐ¸¶´Ù Çѹø¾¿ ´õ È£ÃâÀ» |
| ÇÑ´Ù. ¿¹¸¦ µé¾î, ¼³Á¤ÀÌ ´ÙÀ½°ú °°°í:</p> |
| |
| <example> |
| DocumentRoot /www/htdocs<br /> |
| <Directory /><br /> |
| <indent> |
| Options SymLinksIfOwnerMatch<br /> |
| </indent> |
| </Directory> |
| </example> |
| |
| <p><code>/index.html</code> URI¿¡ ´ëÇÑ ¿äûÀÌ ÀÖ´Ù°í °¡Á¤ÇÏÀÚ. |
| ±×·¯¸é ¾ÆÆÄÄ¡´Â <code>/www</code>, <code>/www/htdocs</code>, |
| <code>/www/htdocs/index.html</code> °¢°¢¿¡ ´ëÇØ |
| <code>lstat(2)</code>¸¦ È£ÃâÇÑ´Ù. <code>lstats</code> |
| °á°ú¸¦ ij½ÌÇÏÁö ¾Ê±â¶§¹®¿¡ ¿äûÀÌ µé¾î¿Ã ¶§¸¶´Ù ¸Å¹ø °°Àº |
| ÀÛ¾÷À» ÇÑ´Ù. ÁøÂ¥ ½Éº¼¸µÅ© º¸¾È °Ë»ç¸¦ ¿øÇÑ´Ù¸é ´ÙÀ½°ú |
| °°ÀÌ ÇÒ ¼ö ÀÖ´Ù:</p> |
| |
| <example> |
| DocumentRoot /www/htdocs<br /> |
| <Directory /><br /> |
| <indent> |
| Options FollowSymLinks<br /> |
| </indent> |
| </Directory><br /> |
| <br /> |
| <Directory /www/htdocs><br /> |
| <indent> |
| Options -FollowSymLinks +SymLinksIfOwnerMatch<br /> |
| </indent> |
| </Directory> |
| </example> |
| |
| <p>ÀÌ °æ¿ì ÃÖ¼ÒÇÑ <directive |
| module="core">DocumentRoot</directive> °æ·Î´Â °Ë»çÇÏÁö |
| ¾Ê´Â´Ù. DocumentRoot ¹Û¿¡ ÀÖ´Â °æ·Î·Î <directive |
| module="mod_alias">Alias</directive>³ª <directive |
| module="mod_rewrite">RewriteRule</directive>À» »ç¿ëÇÑ |
| °æ¿ì¿¡µµ À§¿Í ºñ½ÁÇÑ ¼½¼ÇÀÌ ÇÊ¿äÇÏ´Ù. ½Éº¼¸µÅ© º¸¾ÈÀ» |
| °í·ÁÇÏÁö ¾Ê°í ÃÖ°íÀÇ ¼º´ÉÀ» ¾òÀ¸·Á¸é, |
| <code>FollowSymLinks</code>¸¦ ¼³Á¤ÇÏ°í, |
| <code>SymLinksIfOwnerMatch</code>´Â Àý´ë·Î ¾ÈµÈ´Ù.</p> |
| |
| </section> |
| |
| <section id="htacess"> |
| |
| <title>AllowOverride</title> |
| |
| <p>URL °ø°£¿¡¼ overrides¸¦ Çã¿ëÇÑ´Ù¸é (º¸Åë |
| <code>.htaccess</code> ÆÄÀÏ) ¾ÆÆÄÄ¡´Â ÆÄÀϸíÀÇ °¢ ºÎºÐ¸¶´Ù |
| <code>.htaccess</code>¸¦ ¿±æ ½ÃµµÇÑ´Ù. ¿¹¸¦ µé¾î,</p> |
| |
| <example> |
| DocumentRoot /www/htdocs<br /> |
| <Directory /><br /> |
| <indent> |
| AllowOverride all<br /> |
| </indent> |
| </Directory> |
| </example> |
| |
| <p><code>/index.html</code> URI¿¡ ´ëÇÑ ¿äûÀÌ ÀÖ´Ù°í °¡Á¤ÇÏÀÚ. |
| ¾ÆÆÄÄ¡´Â <code>/.htaccess</code>, <code>/www/.htaccess</code>, |
| <code>/www/htdocs/.htaccess</code>¸¦ ¿·Á°í ½ÃµµÇÑ´Ù. |
| ÇØ°áÃ¥Àº ¾ÕÀÇ <code>Options FollowSymLinks</code> °æ¿ì¿Í |
| ºñ½ÁÇÏ´Ù. ÃÖ°íÀÇ ¼º´ÉÀ» ¾òÀ¸·Á¸é ÆÄÀϽýºÅÛ¿¡ ´ëÇؼ Ç×»ó |
| <code>AllowOverride None</code>À» »ç¿ëÇÑ´Ù.</p> |
| |
| </section> |
| |
| <section id="negotiation"> |
| |
| <title>³»¿ëÇù»ó</title> |
| |
| <p>°¡´ÉÇÏ°í ÁøÂ¥ Á¶±ÝÀÇ ¼º´ÉÇâ»ó¿¡µµ °ü½ÉÀÌ ÀÖ´Ù¸é ³»¿ëÇù»óÀ» |
| ¸·´Â´Ù. ½ÇÁ¦·Î Çù»óÀÇ À̵æÀº ¼º´ÉÀúÇϺ¸´Ù ÀÛ´Ù. ¼¹ö¸¦ |
| ºü¸£°Ô ÇÒ ¼ö ÀÖ´Ù. ´ÙÀ½°ú °°ÀÌ ¿ÍÀϵåÄ«µå¸¦ »ç¿ëÇÏ´Â ´ë½Å:</p> |
| |
| <example> |
| DirectoryIndex index |
| </example> |
| |
| <p>¿ÏÀüÇÑ ¸ñ·ÏÀ» »ç¿ëÇÑ´Ù:</p> |
| |
| <example> |
| DirectoryIndex index.cgi index.pl index.shtml index.html |
| </example> |
| |
| <p>°¡Àå ÈçÇÑ °ÍÀ» ¾Õ¿¡ µÐ´Ù.</p> |
| |
| <p>¶Ç, µð·ºÅ丮¿¡¼ ÆÄÀϵéÀ» ã´Â <code>MultiViews</code> |
| º¸´Ù´Â, ÇÑ ÆÄÀϸ¸ ÀÐÀ¸¸é ÇÊ¿äÇÑ Á¤º¸¸¦ ¾òÀ» ¼ö ÀÖ´Â |
| <code>type-map</code> ÆÄÀÏÀ» Á÷Á¢ ¸¸µå´Â °ÍÀÌ ´õ ºü¸§À» |
| ¸í½ÉÇ϶ó.</p> |
| |
| <p>»çÀÌÆ®¿¡ ³»¿ëÇù»óÀÌ ÇÊ¿äÇÏ´Ù¸é Çù»óÀ» À§ÇØ <code>Options |
| MultiViews</code> Áö½Ã¾î¸¦ »ç¿ëÇϱ⺸´Ù <code>type-map</code> |
| ÆÄÀÏÀ» °í·ÁÇ϶ó. Çù»ó¹æ¹ý¿¡ ´ëÇÑ ÀÚ¼¼ÇÑ ¼³¸í°ú |
| <code>type-map</code> ÆÄÀÏÀ» ¸¸µå´Â ¹æ¹ýÀº <a |
| href="../content-negotiation.html">³»¿ëÇù»ó</a> ¹®¼¸¦ Âü°íÇ϶ó.</p> |
| |
| </section> |
| |
| <section> |
| |
| <title>¸Þ¸ð¸®´ëÀÀ (memory-mapping)</title> |
| |
| <p>¿¹¸¦ µé¾î, server-side-include¸¦ ó¸®ÇÏ´Â µî ¾ÆÆÄÄ¡ |
| 2.0ÀÌ Àü¼ÛÇÒ ÆÄÀÏÀ» ÀÐÀ»¶§ ¿î¿µÃ¼Á¦°¡ <code>mmap(2)</code> |
| µîÀ» Áö¿øÇÑ´Ù¸é ÆÄÀÏÀ» ¸Þ¸ð¸®´ëÀÀÇÑ´Ù.</p> |
| |
| <p>¿©·¯ Ç÷¡Æû¿¡¼ ¸Þ¸ð¸®´ëÀÀÀ» ¼º´ÉÀ» Çâ»óÇÑ´Ù. ±×·¯³ª |
| ¸Þ¸ð¸®´ëÀÀÀÌ ¼¹öÀÇ ¼º´ÉÀ» ¶³¾îÆ®¸®°í ½ÉÁö¾î ¾ÈÁ¤¼ºÀ» |
| ÇØÄ¡´Â °æ¿ì°¡ ÀÖ´Ù:</p> |
| |
| <ul> |
| <li> |
| <p>¾î¶² ¿î¿µÃ¼Á¦¿¡¼ <code>mmap</code>Àº CPU °³¼ö°¡ |
| ¸¹¾ÆÁú¶§ <code>read(2)</code> ¸¸Å È®À强ÀÌ ÁÁÁö ¾Ê´Ù. |
| ¿¹¸¦ µé¾î, ´ÙÁßÇÁ·Î¼¼¼ Solaris ¼¹ö¿¡¼ ¾ÆÆÄÄ¡ 2.0Àº |
| Á¾Á¾ <code>mmap</code>À» »ç¿ëÇÏÁö ¾ÊÀ»¶§ ¼¹ö°¡ ó¸®ÇÑ |
| ÆÄÀÏÀ» ´õ »¡¸® Àü¼ÛÇÑ´Ù.</p> |
| </li> |
| |
| <li> |
| <p>NFS ¸¶¿îÆ®ÇÑ ÆÄÀϽýºÅÛ¿¡ ÀÖ´Â ÆÄÀÏÀ» ¸Þ¸ð¸®´ëÀÀÇÏ´Â |
| µµÁß¿¡ ´Ù¸¥ NFS Ŭ¶óÀ̾ðÆ®¿¡ ÀÖ´Â ÇÁ·Î¼¼½º°¡ ÆÄÀÏÀ» |
| Áö¿ì°Å³ª ÆÄÀÏÅ©±â¸¦ ÁÙÀ̸é, À¥¼¹ö ÇÁ·Î¼¼½º°¡ ´ÙÀ½ |
| ¹ø¿¡ ¸Þ¸ð¸®´ëÀÀÇÑ ÆÄÀϳ»¿ëÀ» ÀÐÀ»¶§ bus error°¡ ¹ß»ýÇÒ |
| ¼ö ÀÖ´Ù.</p> |
| </li> |
| </ul> |
| |
| <p>À§ÀÇ Á¶°Ç¿¡ ÇØ´çÇϸé Àü¼ÛÇÏ´Â ÆÄÀÏÀ» ¸Þ¸ð¸®´ëÀÀÇÏÁö |
| ¾Êµµ·Ï <code>EnableMMAP off</code>¸¦ »ç¿ëÇØ¾ß ÇÑ´Ù. (ÁÖÀÇ: |
| ÀÌ Áö½Ã¾î´Â µð·ºÅ丮º°·Î º¯°æÇÒ ¼ö ÀÖ´Ù.)</p> |
| |
| </section> |
| |
| <section> |
| |
| <title>Sendfile</title> |
| |
| <p>¾ÆÆÄÄ¡´Â ¿î¿µÃ¼Á¦°¡ <code>sendfile(2)</code>À» Áö¿øÇϸé |
| Ä¿³Î sendfileÀ» »ç¿ëÇÏ¿© -- ¿¹¸¦ µé¾î, Á¤Àû ÆÄÀÏÀ» ¼ºñ½ºÇÒ¶§ |
| -- Àü¼ÛÇÒ ÆÄÀÏÀ» Á÷Á¢ ÀÐÁö¾ÊÀ» ¼ö ÀÖ´Ù.</p> |
| |
| <p>¿©·¯ Ç÷¡Æû¿¡¼ sendfileÀ» »ç¿ëÇϸé read¿Í send¸¦ µû·Î |
| ÇÒ ÇÊ¿ä°¡ ¾ø¾î¼ »¡¶óÁø´Ù. ±×·¯³ª sendfileÀ» »ç¿ëÇϸé |
| À¥¼¹öÀÇ ¾ÈÁ¤¼ºÀ» ÇØÄ¡°ÔµÇ´Â °æ¿ì°¡ ÀÖ´Ù:</p> |
| |
| <ul> |
| <li> |
| <p>sendfile Áö¿øÀÌ À߸øµÇ¾ú°í ÄÄÆÄÀÏ ½Ã½ºÅÛÀÌ ÀÌÁ¡À» |
| ¹ß°ßÇÏÁö ¸øÇÏ´Â Ç÷¡ÆûÀÌ ÀÖ´Ù. ƯÈ÷ ´Ù¸¥ ÄÄÇ»ÅÍ¿¡¼ |
| ½ÇÇàÆÄÀÏÀ» ÄÄÆÄÀÏÇÏ¿© sendfile Áö¿øÀÌ À߸øµÈ ÄÄÇ»ÅÍ·Î |
| °¡Á®¿Â °æ¿ì¿¡ °¡´ÉÇÏ´Ù.</p> |
| </li> |
| <li> |
| <p>Ä¿³ÎÀº ÀÚ½ÅÀÇ Ä³½¬¸¦ »ç¿ëÇÏ¿© NFS·Î ¸¶¿îÆ®ÇÑ ÆÄÀÏÀ» |
| ¾ÈÁ¤ÀûÀ¸·Î ¼ºñ½ºÇÒ ¼ö ¾ø´Â °æ¿ì°¡ ÀÖ´Ù.</p> |
| </li> |
| </ul> |
| |
| <p>À§ÀÇ Á¶°Ç¿¡ ÇØ´çÇϸé ÆÄÀÏÀ» sendfile Àü¼ÛÇÏÁö ¾Êµµ·Ï |
| <code>EnableSendfile off</code>¸¦ »ç¿ëÇØ¾ß ÇÑ´Ù. (ÁÖÀÇ: |
| ÀÌ Áö½Ã¾î´Â µð·ºÅ丮º°·Î º¯°æÇÒ ¼ö ÀÖ´Ù.)</p> |
| |
| </section> |
| |
| <section id="process"> |
| |
| <title>ÇÁ·Î¼¼½º »ý¼º</title> |
| |
| <p>¾ÆÆÄÄ¡ 1.3 ÀÌÀü¿¡´Â <directive |
| module="prefork">MinSpareServers</directive>, <directive |
| module="prefork">MaxSpareServers</directive>, <directive |
| module="mpm_common">StartServers</directive> ¼³Á¤ÀÌ ¸ðµÎ |
| º¥Ä¡¸¶Å© °á°ú¿¡ Å« ¿µÇâÀ» ¹ÌÃÆ´Ù. ƯÈ÷ ¾ÆÆÄÄ¡´Â ÀÛ¾÷À» |
| ¼ºñ½ºÇϱâÀ§ÇØ ÃæºÐÇÑ Àڽļö¿¡ ´Ù´Ù¸¦ ¶§±îÁö "µµ´Þ" ±â°£ÀÌ |
| ÇÊ¿äÇß´Ù. óÀ½ <directive |
| module="mpm_common">StartServers</directive>°³ ÀÚ½ÄÀ» |
| ¸¸µçÈÄ, <directive module="prefork">MinSpareServers</directive> |
| ¼³Á¤°ª±îÁö ÃÊ´ç ÀÚ½ÄÀ» Çϳª¾¿ ¸¸µé¾ú´Ù. ±×·¡¼ <directive |
| module="mpm_common">StartServers</directive> ±âº»°ªÀÌ |
| <code>5</code>ÀÎ ¼¹ö¿¡ Ŭ¶óÀ̾ðÆ® 100°³°¡ µ¿½Ã¿¡ Á¢¼ÓÇϸé |
| ºÎÇϸ¦ ó¸®Çϱ⿡ ÃæºÐÇÑ ÀÚ½ÄÀ» ¸¸µé±â±îÁö 95ÃÊ°¡ °É·È´Ù. |
| ÀÚÁÖ Àç½ÃÀÛÇÏÁö ¾Ê´Â ½ÇÁ¦ ¼¹ö¿¡¼´Â Àß µ¿ÀÛÇÏÁö¸¸, 10ºÐ°£¸¸ |
| ½ÇÇàÇÏ´Â º¥Ä¡¸¶Å© °á°ú´Â ¸Å¿ì ³ª»Ú°Ô ³ª¿Â´Ù.</p> |
| |
| <p>ÃÊ´ç ÇÑ°³ ±ÔÄ¢Àº ÀÚ½ÄÀ» »õ·Î ½ÃÀÛÇÏ¸é¼ ¼¹ö¿¡ ¹«¸®¸¦ |
| ÁÖÁö ¾ÊÀ¸·Á°í Á¤Çß´Ù. ÄÄÇ»ÅÍ°¡ ÀÚ½ÄÀ» ½ÃÀÛÇÏ´À¶ó ¹Ù»Ú¸é |
| ¿äûÀ» ¼ºñ½ºÇÒ ¼ö ¾ø´Ù. ±×·¯³ª ÀÌ ±ÔÄ¢ÀÌ ¾ÆÆÄÄ¡ÀÇ Ã¼°¨ |
| ¼º´É¿¡ ¾Ç¿µÇâÀ» ÁÖ¾î º¯°æÇÏ¿´´Ù. ¾ÆÆÄÄ¡ 1.3¿¡¼ ÃÊ´ç ÇÑ°³ |
| ±ÔÄ¢Àº ¿ÏȵǾú´Ù. ÄÚµå´Â ÀÚ½Ä ÇÑ°³¸¦ ¸¸µé°í, 1ÃÊ ½¬°í, |
| µÎ°³¸¦ ¸¸µé°í, 1ÃÊ ½¬°í, ³×°³¸¦ ¸¸µé°í, ÀÌ·± ½ÄÀ¸·Î ÃÊ´ç |
| ÀÚ½ÄÀ» 32°³ ¸¸µé¶§±îÁö Áö¼ö·Î Áõ°¡ÇÑ´Ù. Àڽļö°¡ <directive |
| module="prefork">MinSpareServers</directive> ¼³Á¤¿¡ ´Ù´Ù¸£¸é |
| Áõ°¡¸¦ Áß´ÜÇÑ´Ù.</p> |
| |
| <p>ÀÌ °æ¿ì ¹ÝÀÀ¼Óµµ°¡ »¡¶óÁ®¼ <directive module="prefork" |
| >MinSpareServers</directive>, <directive module="prefork" |
| >MaxSpareServers</directive>, <directive module="mpm_common" |
| >StartServers</directive>¸¦ °ÅÀÇ ¼³Á¤ÇÒ ÇÊ¿ä°¡ ¾ø´Ù. ÀÏÃÊ¿¡ |
| ÀÚ½ÄÀ» 4°³ ÀÌ»ó »ý¼ºÇϸé <directive |
| module="core">ErrorLog</directive>¿¡ ±â·ÏÇÑ´Ù. ÀÌ·± ¿À·ù¹®ÀÌ |
| ¸¹ÀÌ º¸À̸é ÀÌ ¼³Á¤µéÀ» Á¶ÀýÇÏ±æ ¹Ù¶õ´Ù. |
| <module>mod_status</module> °á°ú°¡ µµ¿òÀÌ µÉ °ÍÀÌ´Ù.</p> |
| |
| <p>ÇÁ·Î¼¼½º »ý¼º°ú °ü·ÃÇÏ¿© <directive |
| module="mpm_common">MaxRequestsPerChild</directive> ¼³Á¤Àº |
| ÇÁ·Î¼¼½º¸¦ Á¾·áÇÑ´Ù. ±âº»°ªÀº ÀڽĴç ó¸®ÇÒ ¿äû¼ö¿¡ Á¦ÇÑÀÌ |
| ¾ø´Ù´Â <code>0</code>ÀÌ´Ù. ÇöÀç ¼³Á¤ÀÌ <code>30</code>°ú |
| °°ÀÌ ¸Å¿ì ÀÛÀº °ªÀ¸·Î ¼³Á¤µÇÀÖ´Ù¸é, °ªÀ» »ó´çÈ÷ ³ôÈú ÇÊ¿ä°¡ |
| ÀÖ´Ù. SunOS³ª ¿À·¡µÈ Solaris ¹öÀüÀ» »ç¿ëÇÑ´Ù¸é, ¸Þ¸ð¸®À¯Ã⶧¹®¿¡ |
| ÀÌ °ªÀ» <code>10000</code> Á¤µµ·Î ¼³Á¤Ç϶ó.</p> |
| |
| <p>¿¬°áÀ¯Áö(keep-alive)¸¦ »ç¿ëÇÑ´Ù¸é ÀڽĵéÀº ÀÌ¹Ì ¿¸° |
| ¿¬°á¿¡¼ Ãß°¡ ¿äûÀ» ±â´Ù¸®¸ç ¾Æ¹«°Íµµ ÇÏÁö¾Ê±â¶§¹®¿¡ °è¼Ó |
| ¹Ù»Ú´Ù. <directive module="core">KeepAliveTimeout</directive>ÀÇ |
| ±âº»°ª <code>15</code> ÃÊ´Â ÀÌ·± Çö»óÀ» ÃÖ¼ÒÈÇÑ´Ù. ³×Æ®¿÷ |
| ´ë¿ªÆø°ú ¼¹ö ÀÚ¿ø °£ÀÇ ±ÕÇüÀÌ ¸Â°Ô ¼³Á¤ÇÑ´Ù. <a |
| href="http://www.research.digital.com/wrl/techreports/abstracts/95.4.html"> |
| ¿¬°áÀ¯ÁöÀÇ ´ëºÎºÐÀÇ ÀÌÁ¡ÀÌ »ç¶óÁö±â¶§¹®¿¡</a> ¾î¶² °æ¿ì¿¡µµ |
| ÀÌ °ªÀ» <code>60</code> ÃÊ ÀÌ»óÀ¸·Î ¿Ã¸®Áö ¸¶¶ó.</p> |
| |
| </section> |
| |
| </section> |
| |
| <section id="compiletime"> |
| |
| <title>ÄÄÆÄÀϽà ¼³Á¤¿¡ ´ëÇؼ</title> |
| |
| <section> |
| |
| <title>MPM ¼±ÅÃ</title> |
| |
| <p>¾ÆÆÄÄ¡ 2.x´Â <a href="../mpm.html">´ÙÁß󸮸ðµâ</a> |
| (MPMs)À̶ó´Â ±³Ã¼ÇÒ ¼ö ÀÖ´Â µ¿±âÈ ¸ðµ¨À» Áö¿øÇÑ´Ù. ¾ÆÆÄÄ¡¸¦ |
| ÄÄÆÄÀÏÇÒ¶§ MPMÀ» ¼±ÅÃÇØ¾ß ÇÑ´Ù. <module>beos</module>, |
| <module>mpm_netware</module>, <module>mpmt_os2</module>, |
| <module>mpm_winnt</module>¿Í °°ÀÌ Æ¯Á¤ Ç÷¡Æû¿¡¼¸¸ »ç¿ëÇÒ |
| ¼ö ÀÖ´Â MPMµµ ÀÖ´Ù. ÀϹÝÀûÀÎ À¯´Ð½º·ù ½Ã½ºÅÛÀº ¿©·¯ MPM |
| Áß¿¡ Çϳª¸¦ ¼±ÅÃÇÒ ¼ö ÀÖ´Ù. À¥¼¹öÀÇ ¼Óµµ¿Í |
| È®À强(scalability)Àº ¾î¶² MPMÀ» ¼±ÅÃÇ߳Ŀ¡ ´Þ·È´Ù:</p> |
| |
| <ul> |
| |
| <li><module>worker</module> MPMÀº ¿©·¯ ÀÚ½Ä ÇÁ·Î¼¼½º°¡ |
| °¢°¢ ¿©·¯ ¾²·¹µå¸¦ »ç¿ëÇÑ´Ù. °¢ ¾²·¹µå´Â Çѹø¿¡ ÇÑ ¿¬°áÀ» |
| ´ã´çÇÑ´Ù. ÀϹÝÀûÀ¸·Î worker´Â prefork MPM º¸´Ù ÀûÀº |
| ¸Þ¸ð¸®¸¦ »ç¿ëÇϹǷΠÅë½Å·®ÀÌ ¸¹Àº ¼¹ö¿¡ ÀûÀýÇÏ´Ù.</li> |
| |
| <li><module>prefork</module> MPMÀº ¾²·¹µå°¡ ÇÑ°³ÀÎ ÀÚ½Ä |
| ÇÁ·Î¼¼½º¸¦ ¿©·¯°³ »ç¿ëÇÑ´Ù. °¢ ÇÁ·Î¼¼½º´Â Çѹø¿¡ ÇÑ |
| ¿¬°áÀ» ´ã´çÇÑ´Ù. ¿©·¯ ½Ã½ºÅÛ¿¡¼ preforkÀÇ ¼Óµµ´Â worker¿Í |
| ºñ½ÁÇÏÁö¸¸, ´õ ¸¹Àº ¸Þ¸ð¸®¸¦ »ç¿ëÇÑ´Ù. ´ÙÀ½°ú °°Àº »óȲ¿¡¼ |
| ¾²·¹µå¸¦ »ç¿ëÇÏÁö ¾Ê´Â prefork ¹æ½ÄÀÌ worker¿¡ ºñÇØ |
| ÀÌÁ¡À» °¡Áø´Ù: ¾²·¹µå¿¡ ¾ÈÀüÇÏÁö (thread-safe) ¾ÊÀº |
| Á¦»ïÀÚ°¡ ¸¸µç ¸ðµâÀ» »ç¿ëÇÒ ¼ö ÀÖ°í, ¾²·¹µå µð¹ö±ë Áö¿øÀÌ |
| ºó¾àÇÑ Ç÷¡Æû¿¡¼ ½±°Ô µð¹ö±ëÇÒ ¼ö ÀÖ´Ù.</li> |
| |
| </ul> |
| |
| <p>ÀÌ MPMµé°ú ´Ù¸¥ MPM¿¡ ´ëÇØ ´õ ÀÚ¼¼ÇÑ Á¤º¸´Â MPM <a |
| href="../mpm.html">¹®¼</a>¸¦ Âü°íÇÏ±æ ¹Ù¶õ´Ù.</p> |
| |
| </section> |
| |
| <section id="modules"> |
| |
| <title>¸ðµâ</title> |
| |
| <p>¸Þ¸ð¸® »ç¿ë·®ÀÌ ¼º´É¿¡¼ °¡Àå Áß¿äÇÑ ¿äÀÎÀ̱⶧¹®¿¡ |
| ½ÇÁ¦·Î »ç¿ëÇÏÁö ¾Ê´Â ¸ðµâÀ» Á¦°ÅÇغ¸ÀÚ. ¸ðµâÀ» <a |
| href="../dso.html">DSO</a>·Î ÄÄÆÄÀÏÇß´Ù¸é °£´ÜÈ÷ ±× |
| ¸ðµâ¿¡ ´ëÇÑ <directive |
| module="mod_so">LoadModule</directive> Áö½Ã¾î¸¦ ÁÖ¼®Ã³¸®Çϸé |
| µÈ´Ù. ±×·¡¼ ¸ðµâÀ» Á¦°ÅÇÏ°í ½ÇÇàÇÏ¿© »çÀÌÆ®°¡ ¸ðµâ¾øÀ̵µ |
| Á¤»óÀûÀ¸·Î µ¿ÀÛÇÏ´ÂÁö »ìÆ캼 ¼ö ÀÖ´Ù.</p> |
| |
| <p>¹Ý´ë·Î ¸ðµâÀÌ ¾ÆÆÄÄ¡ ½ÇÇàÆÄÀÏ¿¡ Á¤ÀûÀ¸·Î ¸µÅ©µÇÀÖ´Ù¸é |
| ¿øÇÏÁö ¾Ê´Â ¸ðµâÀ» Á¦°ÅÇϱâÀ§ÇØ ¾ÆÆÄÄ¡¸¦ ÀçÄÄÆÄÀÏÇØ¾ß |
| ÇÑ´Ù.</p> |
| |
| <p>¿©±â¼ ´ç¿¬È÷ ¾î¶² ¸ðµâÀ» »ç¿ëÇÏ°í »ç¿ëÇÏÁö ¸»Áö |
| Àǹ®ÀÌ »ý±ä´Ù. Á¤´äÀº À¥»çÀÌÆ®¸¶´Ù ´Ù¸£´Ù. ±×·¯³ª ¾Æ¸¶µµ |
| <em>ÃÖ¼ÒÇÑ</em> <module>mod_mime</module>, |
| <module>mod_dir</module>, <module>mod_log_config</module> |
| ¸ðµâÀº »ç¿ëÇÒ °ÍÀÌ´Ù. ¹°·Ð À¥»çÀÌÆ®¿¡ ·Î±×ÆÄÀÏÀÌ ÇÊ¿ä¾ø´Ù¸é |
| <code>mod_log_config</code>´Â ¾ø¾îµµ µÈ´Ù. ±×·¯³ª ÃßõÇÏÁö |
| ¾Ê´Â´Ù.</p> |
| |
| </section> |
| |
| <section> |
| |
| <title>Atomic ¸í·É</title> |
| |
| <p><module>mod_cache</module> °°Àº ¸ðµâ°ú ÃÖ±Ù °³¹ßÁßÀÎ |
| worker MPMÀº APRÀÇ atomic API¸¦ »ç¿ëÇÑ´Ù. ÀÌ API´Â °æ·®±Þ |
| ¾²·¹µå µ¿±âȸ¦ À§ÇÒ atomic ¸í·ÉÀ» Á¦°øÇÑ´Ù.</p> |
| |
| <p>±âº»ÀûÀ¸·Î APRÀº °¢ ¿î¿µÃ¼Á¦/CPU Ç÷¡Æû¿¡¼ °¡Àå È¿À²ÀûÀÎ |
| ¹æ¹ýÀ» »ç¿ëÇÏ¿© ÀÌ ¸í·ÉÀ» ±¸ÇöÇÑ´Ù. ¿¹¸¦ µé¾î, ¿©·¯ ÃֽŠ|
| CPU¿¡´Â Çϵå¿þ¾î·Î atomic compare-and-swap (CAS) ¿¬»êÀ» |
| ÇÏ´Â ¸í·É¾î°¡ ÀÖ´Ù. ±×·¯³ª ¾î¶² Ç÷¡Æû¿¡¼ APRÀº ÀÌ·± |
| ¸í·É¾î°¡ ¾ø´Â ¿À·¡µÈ CPU¿Í ȣȯ¼ºÀ» À§ÇØ ´õ ´À¸° mutex±â¹Ý |
| ±¸ÇöÀ» ±âº»ÀûÀ¸·Î »ç¿ëÇÑ´Ù. ÀÌ·± Ç÷¡Æû¿¡¼ ¾ÆÆÄÄ¡¸¦ |
| ÄÄÆÄÀÏÇÒ¶§ ¾ÆÆÄÄ¡¸¦ ÃֽŠCPU¿¡¼¸¸ ½ÇÇàÇÒ °èȹÀ̶ó¸é, |
| ¾ÆÆÄÄ¡¸¦ ±¸¼ºÇÒ¶§ <code>--enable-nonportable-atomics</code> |
| ¿É¼ÇÀ» »ç¿ëÇÏ¿© ´õ ºü¸¥ atomic ±¸ÇöÀ» ¼±ÅÃÇÒ ¼ö ÀÖ´Ù:</p> |
| |
| <example> |
| ./buildconf<br /> |
| ./configure --with-mpm=worker --enable-nonportable-atomics=yes |
| </example> |
| |
| <p><code>--enable-nonportable-atomics</code> ¿É¼ÇÀº ´ÙÀ½°ú |
| °°Àº Ç÷¡Æû¿¡ ¿µÇâÀÌ ÀÖ´Ù:</p> |
| |
| <ul> |
| |
| <li>SPARC¿¡¼ Solaris<br /> |
| ±âº»ÀûÀ¸·Î APRÀº Solaris/SPARC¿¡¼ mutex±â¹Ý atomicÀ» |
| »ç¿ëÇÑ´Ù. ±×·¯³ª ±¸¼ºÇÒ¶§ |
| <code>--enable-nonportable-atomics</code>¸¦ »ç¿ëÇϸé |
| APRÀº ºü¸¥ Çϵå¿þ¾î compare-and-swapÀ» À§ÇÑ SPARC |
| v8plus ¸í·É¾î¸¦ »ç¿ëÇÑ´Ù. ÀÌ ¿É¼ÇÀ» »ç¿ëÇϸé atomic |
| ¸í·ÉÀÌ ´õ È¿À²ÀûÀÌÁö¸¸ (CPU¸¦ ´ú »ç¿ëÇÏ°í ´õ ³ôÀº |
| µ¿±âÈ°¡ °¡´ÉÇÏ´Ù), ÄÄÆÄÀÏÇÑ ½ÇÇàÆÄÀÏÀº UltraSPARC |
| Ĩ¿¡¼¸¸ ½ÇÇàÇÒ ¼ö ÀÖ´Ù. |
| </li> |
| |
| <li>Linux on x86<br /> |
| ±âº»ÀûÀ¸·Î APRÀº ¸®´ª½º¿¡¼ mutex±â¹Ý atomicÀ» |
| »ç¿ëÇÑ´Ù. ±×·¯³ª ±¸¼ºÇÒ¶§ |
| <code>--enable-nonportable-atomics</code>¸¦ »ç¿ëÇϸé |
| APRÀº ºü¸¥ Çϵå¿þ¾î compare-and-swapÀ» À§ÇÑ 486 |
| ¸í·É¾î¸¦ »ç¿ëÇÑ´Ù. ´õ È¿À²ÀûÀÎ atomic ¸í·ÉÀÌ °¡´ÉÇÏÁö¸¸, |
| ÄÄÆÄÀÏÇÑ ½ÇÇàÆÄÀÏÀº 486 ÀÌ»ó Ĩ¿¡¼¸¸ (386Àº ¾ÈµÈ´Ù) |
| ½ÇÇàÇÒ ¼ö ÀÖ´Ù. |
| </li> |
| |
| </ul> |
| |
| </section> |
| |
| <section> |
| |
| <title>mod_status¿Í ExtendedStatus On</title> |
| |
| <p>¾ÆÆÄÄ¡¸¦ ÄÄÆÄÀÏÇÒ¶§ <module>mod_status</module>¸¦ Æ÷ÇÔÇÏ°í |
| ½ÇÇàÇÒ¶§ <code>ExtendedStatus On</code>À» ¼³Á¤ÇÏ¸é ¾ÆÆÄÄ¡´Â |
| ¿äûÀ» ¹ÞÀ»¶§¸¶´Ù <code>gettimeofday(2)</code>(ȤÀº ¿î¿µÃ¼Á¦¿¡ |
| µû¶ó <code>times(2)</code>)¸¦ µÎ¹ø È£ÃâÇÏ°í (1.3 ÀÌÀü¿¡´Â) |
| <code>time(2)</code>µµ Ãß°¡·Î ¿©·¯¹ø È£ÃâÇÑ´Ù. »óÅ º¸°í¼¿¡ |
| µ¿À۽ð£ÀÌ ÇÊ¿äÇϱ⠶§¹®ÀÌ´Ù. ÃÖ»óÀÇ ¼º´ÉÀ» ¾òÀ¸·Á¸é |
| (±âº»°ªÀÎ) <code>ExtendedStatus off</code>¸¦ ¼³Á¤ÇÑ´Ù.</p> |
| |
| </section> |
| |
| <section> |
| |
| <title>accept Á÷·ÄÈ - ¿©·¯ ¼ÒÄÏ</title> |
| |
| <note type="warning"><title>ÁÖÀÇ:</title> |
| <p> ¾Æ·¡ ¹®¼´Â ¾ÆÆÄÄ¡ À¥¼¹ö 2.0 ¹öÀü¿¡¼ º¯°æµÈ ³»¿ëÀ» |
| ´ã°í ÀÖÁö ¾Ê´Ù. ¾ÆÁ÷µµ À¯È¿ÇÑ Á¤º¸°¡ ÀÖÁö¸¸, ÁÖÀÇÇؼ |
| »ç¿ëÇÏ±æ ¹Ù¶õ´Ù.</p> |
| </note> |
| |
| <p>À¯´Ð½º ¼ÒÄÏ APIÀÇ ´ÜÁ¡À» ¼³¸íÇÑ´Ù. À¥¼¹ö°¡ ¿©·¯ Æ÷Æ® |
| ȤÀº ¿©·¯ ÁÖ¼Ò¸¦ ±â´Ù¸®±âÀ§ÇØ ¿©·¯ <directive |
| module="mpm_common">Listen</directive>À» »ç¿ëÇÑ´Ù°í °¡Á¤ÇÏÀÚ. |
| ¿¬°áÀÌ °¡´ÉÇÑÁö °¢ ¼ÒÄÏÀ» °Ë»çÇϱâÀ§ÇØ ¾ÆÆÄÄ¡´Â |
| <code>select(2)</code>¸¦ »ç¿ëÇÑ´Ù. <code>select(2)</code>´Â |
| ¼ÒÄÏ¿¡ ±â´Ù¸®°í ÀÖ´Â ¿¬°áÀÌ <em>¾ø´ÂÁö</em> ȤÀº <em>ÃÖ¼ÒÇÑ |
| ÇÑ°³</em> ÀÖ´ÂÁö ¾Ë·ÁÁØ´Ù. ¾ÆÆÄÄ¡¿¡´Â ¿©·¯ ÀÚ½ÄÀÌ ÀÖ°í, |
| ½¬°í ÀÖ´Â ¸ðµç ÀÚ½ÄÀº µ¿½Ã¿¡ »õ·Î¿î ¿¬°áÀ» °Ë»çÇÑ´Ù. ¿ø·¡ |
| ±¸ÇöÀº ´ÙÀ½°ú ºñ½ÁÇÏ´Ù (ÀÌ ¿¹´Â Äڵ忡¼ °¡Á®¿ÀÁö ¾Ê¾Ò´Ù. |
| ´ÜÁö ¼³¸íÇϱâÀ§ÇÑ ¿ëµµ·Î ¸¸µé¾ú´Ù.):</p> |
| |
| <example> |
| for (;;) {<br /> |
| <indent> |
| for (;;) {<br /> |
| <indent> |
| fd_set accept_fds;<br /> |
| <br /> |
| FD_ZERO (&accept_fds);<br /> |
| for (i = first_socket; i <= last_socket; ++i) {<br /> |
| <indent> |
| FD_SET (i, &accept_fds);<br /> |
| </indent> |
| }<br /> |
| rc = select (last_socket+1, &accept_fds, NULL, NULL, NULL);<br /> |
| if (rc < 1) continue;<br /> |
| new_connection = -1;<br /> |
| for (i = first_socket; i <= last_socket; ++i) {<br /> |
| <indent> |
| if (FD_ISSET (i, &accept_fds)) {<br /> |
| <indent> |
| new_connection = accept (i, NULL, NULL);<br /> |
| if (new_connection != -1) break;<br /> |
| </indent> |
| }<br /> |
| </indent> |
| }<br /> |
| if (new_connection != -1) break;<br /> |
| </indent> |
| }<br /> |
| process the new_connection;<br /> |
| </indent> |
| } |
| </example> |
| |
| <p>±×·¯³ª À§ÀÇ ´Ü¼øÇÑ ±¸Çö¿¡´Â ½É°¢ÇÑ °í°¥(starvation) |
| ¹®Á¦°¡ ÀÖ´Ù. ¿©·¯ ÀÚ½ÄÀÌ µ¿½Ã¿¡ ÀÌ ¹Ýº¹¹®À» ½ÇÇàÇϸé, |
| ¿äûÀ» ±â´Ù¸®¸ç ¸ðµÎ <code>select</code>¿¡¼ ¸ØÃá´Ù. À̶§ |
| ¾î¶² ¼ÒÄÏ¿¡ ¿äûÀÌ Çϳª¶óµµ µé¾î¿À¸é ¸ðµç ÀÚ½ÄÀÌ ±ú¾î³´Ù |
| (±ú¾î³ª´Â ÀÚ½ÄÀÇ °³¼ö´Â ¿î¿µÃ¼Á¦¿Í ŸÀֿ̹¡ µû¶ó ´Ù¸£´Ù). |
| À̵éÀº ¸ðµÎ ¿¬°áÀ» <code>accept</code>ÇÏ±æ ½ÃµµÇÑ´Ù. ±×·¯³ª |
| (¾ÆÁ÷µµ ÇÑ ¿¬°á¸¸ ´ë±âÁßÀ̶ó¸é) ÇÑ Àڽĸ¸ ¼º°øÇÏ°í, ³ª¸ÓÁö´Â |
| <code>accept</code>¿¡¼ <em>¸ØÃá´Ù.</em> ±×·¯¸é ÀÌ ÀڽĵéÀº |
| ÇÑ ¼ÒÄÏÀÇ ¿äû¸¸À» ¼ºñ½ºÇϵµ·Ï ¹¿©¼, ±× ¼ÒÄÏÀ¸·Î »õ·Î¿î |
| ¿äûÀÌ ÃæºÐÈ÷ µé¾î¿Í¼ ¸ðµç ÀÚ½ÄÀ» ±ú¿ï¶§±îÁö Á¤ÁöÇØÀÖ´Ù. |
| ÀÌ·± °í°¥ ¹®Á¦´Â <a |
| href="http://bugs.apache.org/index/full/467">PR#467</a>¿¡ |
| óÀ½ º¸°íµÇ¾ú´Ù. ÃÖ¼ÒÇÑ µÎ°¡Áö ÇØ°áÃ¥ÀÌ ÀÖ´Ù.</p> |
| |
| <p>ÇÑ°¡Áö´Â ¼ÒÄÏÀ» ´ë±âÇÏÁö ¾Êµµ·Ï (non-blocking) ¸¸µå´Â |
| ¹æ¹ýÀÌ´Ù. ÀÌ °æ¿ì ÀÚ½ÄÀÌ <code>accept</code>¸¦ Çصµ ¸ØÃßÁö |
| ¾Ê°í, Áï½Ã ÁøÇàÇÒ ¼ö ÀÖ´Ù. ±×·¯³ª CPU ½Ã°£À» ³¶ºñÇÑ´Ù. |
| <code>select</code>¿¡¼ ½¬´Â ÀÚ½ÄÀÌ 10°³ ÀÖ°í, »õ·Î ¿¬°áÀÌ |
| ÇÑ°³ µé¾î¿Ô´Ù°í °¡Á¤ÇÏÀÚ. ±×·¯¸é ÀÌ ÀÚ½ÄÁß 9°³´Â ±ú¾î³ª¼ |
| ¿¬°áÀ» <code>accept</code>ÇÏ±æ ½ÃµµÇÏ°í ½ÇÆÐÇÏ¸é ¾Æ¹« |
| Àϵµ ÇÏÁö ¾Ê°í ´Ù½Ã <code>select</code>¸¦ ¹Ýº¹ÇÑ´Ù. ´Ù½Ã |
| <code>select</code>·Î µ¹¾Æ¿Ã ¶§±îÁö ¾î¶² Àڽĵµ ´Ù¸¥ ¼ÒÄÏ¿¡ |
| µé¾î¿Â ¿äûÀ» ¼ºñ½ºÇÏÁö ¾Ê´Â´Ù. (´ÙÁßÇÁ·Î¼¼¼ ÄÄÇ»ÅÍ¿¡¼) |
| ½¬´Â ÀÚ½Ä °³¼ö¸¸Å CPU °³¼ö°¡ ÀÖ´Â µå¹® °æ¿ì°¡ ¾Æ´Ï¶ó¸é |
| ÀÌ ÇØ°áÃ¥Àº º°·Î ÁÁ¾Æº¸ÀÌÁö ¾Ê´Â´Ù.</p> |
| |
| <p>´Ù¸¥ ¹æ¹ýÀº ¾ÆÆÄÄ¡°¡ »ç¿ëÇÏ´Â ¹æ¹ýÀ¸·Î ³»ºÎ ¹Ýº¹¹®¿¡ |
| ÇÑ Àڽĸ¸À» µé¿©º¸³½´Ù. ¹Ýº¹¹®Àº ´ÙÀ½°ú °°´Ù (Â÷À̸¦ |
| °Á¶ÇßÀ½):</p> |
| |
| <example> |
| for (;;) {<br /> |
| <indent> |
| <strong>accept_mutex_on ();</strong><br /> |
| for (;;) {<br /> |
| <indent> |
| fd_set accept_fds;<br /> |
| <br /> |
| FD_ZERO (&accept_fds);<br /> |
| for (i = first_socket; i <= last_socket; ++i) {<br /> |
| <indent> |
| FD_SET (i, &accept_fds);<br /> |
| </indent> |
| }<br /> |
| rc = select (last_socket+1, &accept_fds, NULL, NULL, NULL);<br /> |
| if (rc < 1) continue;<br /> |
| new_connection = -1;<br /> |
| for (i = first_socket; i <= last_socket; ++i) {<br /> |
| <indent> |
| if (FD_ISSET (i, &accept_fds)) {<br /> |
| <indent> |
| new_connection = accept (i, NULL, NULL);<br /> |
| if (new_connection != -1) break;<br /> |
| </indent> |
| }<br /> |
| </indent> |
| }<br /> |
| if (new_connection != -1) break;<br /> |
| </indent> |
| }<br /> |
| <strong>accept_mutex_off ();</strong><br /> |
| process the new_connection;<br /> |
| </indent> |
| } |
| </example> |
| |
| <p><code>accept_mutex_on</code>°ú <code>accept_mutex_off</code> |
| <a id="serialize" name="serialize">ÇÔ¼ö</a>´Â mutex ¼¼¸¶Æ÷¾î¸¦ |
| ±¸ÇöÇÑ´Ù. Çѹø¿¡ ¿ÀÁ÷ ÇÑ Àڽĸ¸ÀÌ mutex¸¦ °¡Áú ¼ö ÀÖ´Ù. |
| mutex¸¦ ±¸ÇöÇÏ´Â ¹æ¹ýÀº ¿©·¯°¡ÁöÀÌ´Ù. ±¸Çö ¹æ¹ýÀº (1.3 |
| ÀÌÀü) <code>src/conf.h</code>³ª (1.3°ú ±× ÀÌÈÄ) |
| <code>src/include/ap_config.h</code>¿¡ Á¤ÀǵÇÀÖ´Ù. ¾î¶² |
| ¾ÆÅ°ÅØÃÄ´Â Àá±Ý(locking) ¹æ¹ýÀ» ¼±ÅÃÇÏÁö ¾Ê±â¶§¹®¿¡, ÀÌ·± |
| ¾ÆÅ°ÅØÃÄ¿¡¼ ¿©·¯ <directive |
| module="mpm_common">Listen</directive> Áö½Ã¾î¸¦ »ç¿ëÇϸé |
| À§ÇèÇÏ´Ù.</p> |
| |
| <p>½ÇÇà½Ã <directive |
| module="mpm_common">AcceptMutex</directive> Áö½Ã¾î¸¦ »ç¿ëÇÏ¿© |
| mutex ±¸ÇöÀ» º¯°æÇÒ ¼ö ÀÖ´Ù.</p> |
| |
| <dl> |
| <dt><code>AcceptMutex flock</code></dt> |
| |
| <dd> |
| <p>ÀÌ ¹æ¹ýÀº Àá±ÝÆÄÀÏÀ» Àá±×±âÀ§ÇØ <code>flock(2)</code> |
| ½Ã½ºÅÛÈ£ÃâÀ» »ç¿ëÇÑ´Ù (Àá±ÝÆÄÀÏ À§Ä¡´Â <directive |
| module="mpm_common">LockFile</directive> Áö½Ã¾î·Î ÁöÁ¤).</p> |
| </dd> |
| |
| <dt><code>AcceptMutex fcntl</code></dt> |
| |
| <dd> |
| <p>ÀÌ ¹æ¹ýÀº Àá±ÝÆÄÀÏÀ» Àá±×±âÀ§ÇØ <code>fcntl(2)</code> |
| ½Ã½ºÅÛÈ£ÃâÀ» »ç¿ëÇÑ´Ù (Àá±ÝÆÄÀÏ À§Ä¡´Â <directive |
| module="mpm_common">LockFile</directive> Áö½Ã¾î·Î ÁöÁ¤).</p> |
| </dd> |
| |
| <dt><code>AcceptMutex sysvsem</code></dt> |
| |
| <dd> |
| <p>(1.3°ú ±× ÀÌÈÄ) ÀÌ ¹æ¹ýÀ» SysV½Ä ¼¼¸¶Æ÷¾î¸¦ »ç¿ëÇÏ¿© |
| mutex¸¦ ±¸ÇöÇÑ´Ù. ºÒÇàÈ÷µµ SysV½Ä ¼¼¸¶Æ÷¾î´Â ³ª»Û |
| ºÎÀÛ¿ëÀÌ ÀÖ´Ù. Çϳª´Â ¾ÆÆÄÄ¡°¡ ¼¼¸¶Æ÷¾î¸¦ Á¤¸®ÇÏÁö |
| ¾Ê°í Á×À» ¼ö ÀÖ´Â Á¡ÀÌ´Ù (<code>ipcs(8)</code> manpage |
| Âü°í). ´Ù¸¥ Çϳª´Â À¥¼¹ö¿Í µ¿ÀÏÇÑ uid·Î ½ÇÇàÇÏ´Â |
| CGI°¡ (<em>Áï,</em> <code>suexec</code>³ª |
| <code>cgiwrapper</code>¸¦ »ç¿ëÇÏÁö¾Ê´Â ÇÑ ¸ðµç CGI) |
| ¼¼¸¶Æ÷¾î API¸¦ »ç¿ëÇÏ¿© ¼ºñ½º°ÅºÎ°ø°ÝÀ» ÇÒ ¼ö ÀÖ´Â |
| Á¡ÀÌ´Ù. ÀÌ·± ÀÌÀ¯¶§¹®¿¡ IRIX¸¦ Á¦¿ÜÇÑ ¾ÆÅ°ÅØÃÄ¿¡¼ |
| ÀÌ ¹æ¹ýÀ» »ç¿ëÇÏÁö ¾Ê´Â´Ù (´ëºÎºÐÀÇ IRIX ÄÄÇ»ÅÍ¿¡¼ |
| ¾ÕÀÇ µÎ ¹æ¹ýÀº Áö³ªÄ¡°Ô ¹ö°Ì´Ù).</p> |
| </dd> |
| |
| <dt><code>AcceptMutex pthread</code></dt> |
| |
| <dd> |
| <p>(1.3°ú ±× ÀÌÈÄ) ÀÌ ¹æ¹ýÀº POSIX mutex¸¦ »ç¿ëÇϱ⶧¹®¿¡ |
| POSIX ¾²·¹µå ±Ô¾àÀ» ¿ÏÀüÈ÷ ±¸ÇöÇÑ ¾ÆÅ°ÅØÃĶó¸é ¸ðµÎ |
| »ç¿ë°¡´ÉÇÏÁö¸¸, (2.5 ÀÌÈÄ) Solaris¿¡¼¸¸ ±×°Íµµ ƯÁ¤ |
| ±¸¼º¿¡¼¸¸ µ¿ÀÛÇÏ´Â µíÇÏ´Ù. ÀÌ ¹æ¹ýÀ» ½ÃµµÇغ»´Ù¸é |
| ¼¹ö°¡ ¸ØÃç¼ ÀÀ´äÀ» ¾ÈÇÏ´ÂÁö »ìÆìºÁ¾ß ÇÑ´Ù. Á¤Àû |
| ³»¿ë¸¸ ¼ºñ½ºÇÏ´Â ¼¹ö´Â Àß µ¿ÀÛÇÏ´Â °Í °°´Ù.</p> |
| </dd> |
| |
| <dt><code>AcceptMutex posixsem</code></dt> |
| |
| <dd> |
| <p>(2.0°ú ±× ÀÌÈÄ) ÀÌ ¹æ¹ýÀº POSIX ¼¼¸¶Æ÷¾î¸¦ »ç¿ëÇÑ´Ù. |
| mutex¸¦ °¡Áø ÇÁ·Î¼¼½ºÀÇ ¾²·¹µå°¡ Á״´ٸé(segfault) |
| ¼¼¸¶Æ÷¾î ¼ÒÀ¯±ÇÀÌ È¸º¹µÇÁö ¾Ê¾Æ¼ À¥¼¹ö°¡ ¸ØÃá´Ù.</p> |
| </dd> |
| |
| </dl> |
| |
| <p>½Ã½ºÅÛ¿¡ À§ ¸ñ·Ï¿¡ ¾ø´Â Á÷·ÄÈ(serialization) ¹æ¹ýÀÌ |
| ÀÖ´Ù¸é ±× ¹æ¹ýÀ» »ç¿ëÇÏ´Â Äڵ带 APR¿¡ Ãß°¡ÇÒ °¡Ä¡°¡ ÀÖ´Ù.</p> |
| |
| <p>°í·Á´Â ÇغÃÁö¸¸ ±¸ÇöÇÏÁö¾ÊÀº ´Ù¸¥ ¹æ¹ýÀº ºÎºÐÀûÀ¸·Î |
| ¹Ýº¹¹®À» Á÷·ÄÈÇÏ´Â ¹æ¹ýÀÌ´Ù. Áï, ÇÁ·Î¼¼¼¸¦ ¸î°³¸¸ µé¿©º¸³»´Â |
| °ÍÀÌ´Ù. ÀÌ ¹æ¹ýÀº ¿©·¯ ÀÚ½ÄÀ» µ¿½Ã¿¡ ½ÇÇàÇÒ ¼ö ÀÖ¾î¼ |
| Á÷·Äȶ§¹®¿¡ Àüü ´ë¿ªÆøÀ» È°¿ëÇÏÁö ¸øÇÏ´Â ´ÙÁßÇÁ·Î¼¼¼ |
| ÄÄÇ»ÅÍ¿¡¼¸¸ °ü½ÉÀ» °¡Á®º¼ ¼ö ÀÖ´Ù. ¾ÕÀ¸·Î »ìÆ캼 ºÎºÐÀÌÁö¸¸, |
| ¸Å¿ì º´·ÄÈµÈ À¥¼¹ö°¡ ÈçÇÏÁö ¾Ê¾Æ¼ ¿ì¼±¼øÀ§°¡ ³·´Ù.</p> |
| |
| <p>ÃÖ»óÀÇ ¼º´ÉÀ» ¾ò±âÀ§Çؼ´Â ¿©·¯ <directive |
| module="mpm_common">Listen</directive> ¹®À» »ç¿ëÇÏÁö ¾Ê´Â |
| °ÍÀÌ ÀÌ»óÀûÀÌ´Ù. ±×·¯³ª °è¼Ó ¼³¸íÇÑ´Ù.</p> |
| |
| </section> |
| |
| <section> |
| |
| <title>accept Á÷·ÄÈ - ¼ÒÄÏ ÇÑ°³</title> |
| |
| <p>¾ÕÀÇ ¼³¸íÀº ´ÙÁß¼ÒÄÏ ¼¹ö¿¡´Â ÁÁÁö¸¸, ¼ÒÄÏÀÌ ÇÑ°³ÀÎ |
| ¼¹ö´Â ¾î¶²°¡? ¿¬°áÀÌ µµÂøÇÒ¶§±îÁö ¸ðµç ÀÚ½ÄÀÌ |
| <code>accept(2)</code>¿¡¼ ¸ØÃçÀֱ⶧¹®¿¡ ÀÌ·Ð»ó °°Àº |
| ¹®Á¦°¡ ¹ß»ýÇÏÁö ¾Ê°í, °í°¥ ¹®Á¦µµ ¾ø´Ù. ±×·¯³ª ½ÇÁ¦·Î´Â |
| ¾Õ¿¡¼ ¸»ÇÑ ´ë±âÇÏÁö ¾Ê´Â (non-blocking) ¹æ¹ý¿¡¼ ¹ß»ýÇÏ´Â |
| "°øȸÀü(spinning)" Çö»óÀ» °¨Ãß°í ÀÖ´Ù. ´ëºÎºÐÀÇ TCP ½ºÅÃÀº |
| ¿¬°áÀÌ µµÂøÇϸé Ä¿³ÎÀÌ <code>accept</code>¿¡¼ ¸ØÃçÀÖ´Â |
| ¸ðµç ÀÚ½ÄÀ» ±ú¿ìµµ·Ï ±¸ÇöµÇÀÖ´Ù. ÇÁ·Î¼¼½ºÁß ÇÑ°³°¡ ¿¬°áÀ» |
| ¾ò°í »ç¿ëÀÚ¿µ¿ªÀ¸·Î µ¹¾Æ°¡°í, ³ª¸ÓÁö´Â Ä¿³Î¿¡¼ °øȸÀüÇÏ¿© |
| ¿¬°áÀÌ ¾øÀ½À» ¹ß°ßÇÏ¸é ´Ù½Ã ÀáÀ» ÀÜ´Ù. »ç¿ëÀÚ¿µ¿ª Äڵ忡¼´Â |
| ÀÌ·± °øȸÀüÀ» ¾Ë ¼ö ¾øÁö¸¸, ºÐ¸íÈ÷ Á¸ÀçÇÑ´Ù. ±×·¡¼ ´ÙÁß¼ÒÄÏÀÇ |
| ´ë±âÇÏÁö ¾Ê´Â ¹æ¹ý°ú µ¿ÀÏÇÏ°Ô ºÎÇϸ¦ ³ôÀÌ´Â ºÒÇÊ¿äÇÑ ÇൿÀÌ |
| ÀϾÙ.</p> |
| |
| <p>±×·¡¼ ¿ì¸®´Â ¿©·¯ ¾ÆÅ°ÅØÃÄ¿¡¼ ¼ÒÄÏÀÌ ÇÑ°³ÀÎ °æ¿ì¿¡µµ |
| Á÷·ÄÈÇÏ¸é ´õ "Àß" µ¿ÀÛÇÔÀ» ¹ß°ßÇß´Ù. ±×·¡¼ °ÅÀÇ ´ëºÎºÐÀÇ |
| °æ¿ì ±âº»ÀûÀ¸·Î Á÷·Äȸ¦ »ç¿ëÇÑ´Ù. ¸®´ª½º¿¡¼ (Ä¿³Î 2.0.30, |
| 128Mb ¸Þ¸ð¸®¿¡ µà¾ó Pentium pro) ½ÇÇèÇÑ °á°ú ¼ÒÄÏ ÇÑ°³¸¦ |
| Á÷·ÄÈÇϸé ÇÏÁö ¾ÊÀº °æ¿ì¿¡ ºñÇØ ÃÊ´ç ¿äûÀÌ 3% ¹Ì¸¸ |
| ÁÙ¾îµé¾ú´Ù. ±×·¯³ª Á÷·Äȸ¦ ÇÏÁö ¾ÊÀº °æ¿ì ¿äû´ç 100ms |
| Áö¿¬ÀÌ ¹ß»ýÇß´Ù. ÀÌ Áö¿¬Àº ¾Æ¸¶µµ LAN¿¡¼ ¹ß»ýÇÏ´Â ±ä |
| ¿¬°á¼±¶§¹®ÀÏ °ÍÀÌ´Ù. ¼ÒÄÏÀÌ ÇÑ°³ÀÎ °æ¿ì Á÷·Äȸ¦ »ç¿ëÇÏÁö |
| ¾ÊÀ¸·Á¸é <code>SINGLE_LISTEN_UNSERIALIZED_ACCEPT</code>¸¦ |
| Á¤ÀÇÇÑ´Ù.</p> |
| |
| </section> |
| |
| <section> |
| |
| <title>Close Áö¿¬(lingering)</title> |
| |
| <p><a |
| href="http://www.ics.uci.edu/pub/ietf/http/draft-ietf-http-connection-00.txt"> |
| draft-ietf-http-connection-00.txt</a> 8Àý¿¡¼ ¼³¸íÇϵíÀÌ |
| <strong>¾ÈÁ¤ÀûÀÎ</strong> À¥¼¹ö°¡ µÇ·Á¸é, Åë½ÅÀÇ ¾ç ¹æÇâÀ» |
| µ¶¸³ÀûÀ¸·Î ´ÝÀ» ¼ö ÀÖ¾î¾ß ÇÑ´Ù (TCP ¿¬°áÀº ½Ö¹æÇâÀÌ°í, |
| ¹æÇâÀº ¼·Î µ¶¸³ÀûÀÌ´Ù). ÀÌÁ¡À» ´Ù¸¥ ¼¹ö¿¡¼´Â ÀÚÁÖ |
| °£°úÇÏÁö¸¸, ¾ÆÆÄÄ¡´Â 1.2ºÎÅÍ Á¤È®È÷ ±¸ÇöÇØ¿Ô´Ù.</p> |
| |
| <p>ÀÌ ±â´ÉÀ» ºÎÁÖÀÇÇÏ°Ô ¾ÆÆÄÄ¡¿¡ Ãß°¡ÇßÀ»¶§ ¿©·¯ À¯´Ð½º |
| ¹öÀü¿¡¼ ¸¹Àº ¹®Á¦°¡ ¹ß»ýÇß´Ù. TCP ±Ô¾àÀº |
| <code>FIN_WAIT_2</code>¿¡ ŸÀӾƿôÀÌ ÀÖ´Ù°í Á¤ÇÏÁö ¾Ê¾ÒÁö¸¸, |
| ±ÝÁöÇÏÁöµµ ¾Ê¾Ò´Ù. ŸÀӾƿôÀÌ ¾ø´Â ½Ã½ºÅÛ¿¡¼ ¾ÆÆÄÄ¡ 1.2´Â |
| ¸¹Àº ¼ÒÄÏÀ» ¿µ¿øÈ÷ <code>FIN_WAIT_2</code> »óÅ·Π¸¸µé¾ú´Ù. |
| ¸¹Àº °æ¿ì ÀÌ ¹®Á¦´Â Á¦Àۻ簡 Á¦°øÇÏ´Â ÃֽŠTCP/IP ÆÐÄ¡¸¦ |
| Àû¿ëÇÏ¿© ÇØ°áÇÒ ¼ö ÀÖ´Ù. ±×·¯³ª Á¦Àۻ簡 ÆÐÄ¡¸¦ ¹ßÇ¥ÇÏÁö |
| ¾Ê´Â °æ¿ì°¡ (<em>Áï,</em> SunOS4 -- ¼Ò½º ¶óÀ̼±½º°¡ ÀÖ´Â |
| »ç¶÷Àº Á÷Á¢ ÆÐÄ¡ÇÒ ¼ö ÀÖÁö¸¸) Àֱ⶧¹®¿¡ ÀÌ ±â´ÉÀ» »ç¿ëÇÏÁö |
| ¾Ê±â·Î °áÁ¤Çß´Ù.</p> |
| |
| <p>¹æ¹ýÀº µÎ°¡Áö´Ù. Çϳª´Â ¼ÒÄÏ ¿É¼Ç <code>SO_LINGER</code>¸¦ |
| »ç¿ëÇÏ´Â ¹æ¹ýÀÌ´Ù. ±×·¯³ª ºÒÇàÈ÷µµ ´ëºÎºÐÀÇ TCP/IP ½ºÅÃÀº |
| ÀÌ ¿É¼ÇÀ» ¿Ã¹Ù·Î ±¸ÇöÇÏÁö ¾Ê¾Ò´Ù. ¿Ã¹Ù·Î ±¸ÇöÇÑ ½ºÅÿ¡¼ |
| Á¶Â÷µµ (<em>Áï,</em> ¸®´ª½º 2.0.31) ÀÌ ¹æ¹ýÀº ´ÙÀ½ ¹æ¹ýº¸´Ù |
| ´õ cpu¸¦ Àâ¾Æ¸Ô´Â´Ù.</p> |
| |
| <p>¾ÆÆÄÄ¡´Â º¸Åë (<code>http_main.c</code>¿¡ ÀÖ´Â) |
| <code>lingering_close</code>¶ó´Â ÇÔ¼ö¸¦ »ç¿ëÇÑ´Ù. ÀÌ ÇÔ¼ö´Â |
| ´ëÃæ ´ÙÀ½°ú °°´Ù:</p> |
| |
| <example> |
| void lingering_close (int s)<br /> |
| {<br /> |
| <indent> |
| char junk_buffer[2048];<br /> |
| <br /> |
| /* shutdown the sending side */<br /> |
| shutdown (s, 1);<br /> |
| <br /> |
| signal (SIGALRM, lingering_death);<br /> |
| alarm (30);<br /> |
| <br /> |
| for (;;) {<br /> |
| <indent> |
| select (s for reading, 2 second timeout);<br /> |
| if (error) break;<br /> |
| if (s is ready for reading) {<br /> |
| <indent> |
| if (read (s, junk_buffer, sizeof (junk_buffer)) <= 0) {<br /> |
| <indent> |
| break;<br /> |
| </indent> |
| }<br /> |
| /* just toss away whatever is here */<br /> |
| </indent> |
| }<br /> |
| </indent> |
| }<br /> |
| <br /> |
| close (s);<br /> |
| </indent> |
| } |
| </example> |
| |
| <p>ÀÌ ÄÚµå´Â ¿¬°áÀ» ´ÝÀ»¶§ ´õ CPU¸¦ »ç¿ëÇÏÁö¸¸, ¾ÈÁ¤ÀûÀÎ |
| ±¸ÇöÀ» À§ÇØ ÇÊ¿äÇÏ´Ù. HTTP/1.1ÀÌ ´õ ³Î¸® ÆÛÁö°í ¸ðµç ¿¬°áÀ» |
| À¯ÁöÇÑ´Ù¸é(persistent), ¿¬°áÀ» ¹Þ´Â ºñ¿ëÀº ¿©·¯ ¿äûÀ» |
| ó¸®ÇÏ¸é¼ »ó¼âµÉ °ÍÀÌ´Ù. À§ÇèÇÏ°Ôµµ |
| <code>NO_LINGCLOSE</code>¸¦ Á¤ÀÇÇÏ¿© ÀÌ ±â´ÉÀ» »ç¿ëÇÏÁö |
| ¾ÊÀ» ¼ö ÀÖÁö¸¸, Àý´ë·Î ±ÇÇÏÁö ¾Ê´Â´Ù. ƯÈ÷ HTTP/1.1 |
| ÆÄÀÌÇÁ¶óÀÎ <transnote>¿¬°áÀ¯Áö »óÅ¿¡¼ ÀÀ´äÀ» ±â´Ù¸®Áö |
| ¾Ê°í ¿©·¯ ¿äûÀ» º¸³»´Â ±â¼ú</transnote> ¿¬°áÀ¯Áö¿¡´Â |
| <code>lingering_close</code>°¡ ÇʼöÀûÀÌ´Ù (±×¸®°í <a |
| href="http://www.w3.org/Protocols/HTTP/Performance/Pipeline.html"> |
| ÆÄÀÌÇÁ¶óÀÎ ¿¬°áÀÌ ´õ ºü¸£±â¶§¹®¿¡</a> »ç¿ëÇÏ±æ ¹Ù¶ö °ÍÀÌ´Ù).</p> |
| |
| </section> |
| |
| <section> |
| |
| <title>Scoreboard ÆÄÀÏ</title> |
| |
| <p>¾ÆÆÄÄ¡ÀÇ ºÎ¸ð¿Í ÀÚ½ÄÀº scoreboard¶ó´Â °ÍÀ» ÅëÇØ ¼·Î |
| Åë½ÅÇÑ´Ù. ÀÌ»óÀûÀ¸·Î´Â scoreboard¸¦ °øÀ¯¸Þ¸ð¸®·Î ±¸ÇöÇØ¾ß |
| ÇÑ´Ù. ¿ì¸® °³¹ßÀÚ°¡ ÇØ´ç ¿î¿µÃ¼Á¦¿¡ Á¢±ÙÇÒ ¼ö Àְųª »ó¼¼ÇÑ |
| Æ÷Æà °á°ú¸¦ ¹ÞÀº °æ¿ì º¸Åë °øÀ¯¸Þ¸ð¸®¸¦ »ç¿ëÇÏ¿© ±¸ÇöÇÑ´Ù. |
| ³ª¸ÓÁö´Â µð½ºÅ©¿¡ ÀÖ´Â ÆÄÀÏÀ» »ç¿ëÇÏ¿© ±¸ÇöÇÑ´Ù. µð½ºÅ©¿¡ |
| ÀÖ´Â ÆÄÀÏÀº ´À¸®°í ½Å·Úµµ°¡ ¶³¾îÁø´Ù (±â´Éµµ ´õ Àû´Ù). |
| <code>src/main/conf.h</code> ÆÄÀÏ¿¡¼ »ç¿ëÇÏ´Â ¾ÆÅ°ÅØÃĸ¦ |
| ã¾Æ¼ <code>USE_MMAP_SCOREBOARD</code> ȤÀº |
| <code>USE_SHMGET_SCOREBOARD</code>ÀÎÁö È®ÀÎÇÑ´Ù. µÑÁß |
| Çϳª¸¦ (°¢°¢ ÇÔ²² »ç¿ëÇÒ <code>HAVE_MMAP</code>À̳ª |
| <code>HAVE_SHMGET</code>µµ °°ÀÌ) Á¤ÀÇÇÏ¸é °øÀ¯¸Þ¸ð¸® Äڵ带 |
| »ç¿ëÇÑ´Ù. ½Ã½ºÅÛÀÌ ´Ù¸¥ Á¾·ùÀÇ °øÀ¯¸Þ¸ð¸®¸¦ »ç¿ëÇÑ´Ù¸é |
| <code>src/main/http_main.c</code> ÆÄÀÏÀ» ¼öÁ¤ÇÏ¿© ¾ÆÆÄÄ¡¿¡¼ |
| °øÀ¯¸Þ¸ð¸®¸¦ »ç¿ëÇÒ ¼ö ÀÖµµ·Ï ÈÅ(hook)À» Ãß°¡Ç϶ó. (¶ÇÇÑ |
| ÆÐÄ¡¸¦ ¿ì¸®¿¡°Ô º¸³»ÁÖ±æ ¹Ù¶õ´Ù.)</p> |
| |
| <note>¿ª»çÀû ¼³¸í: ¾ÆÆÄÄ¡ÀÇ ¸®´ª½º ¹öÀüÀº ¾ÆÆÄÄ¡ 1.2 ¹öÀüºÎÅÍ |
| °øÀ¯¸Þ¸ð¸®¸¦ »ç¿ëÇϱ⠽ÃÀÛÇß´Ù. ¸®´ª½º¿¡¼ Ãʱ⠾ÆÆÄÄ¡ |
| ¹öÀüÀÌ ´À¸®°í ½Å·Úµµ°¡ ¶³¾îÁ³±â ¶§¹®ÀÌ´Ù.</note> |
| |
| </section> |
| |
| <section> |
| |
| <title>DYNAMIC_MODULE_LIMIT</title> |
| |
| <p>¸ðµâÀ» µ¿ÀûÀ¸·Î ÀоîµéÀÌÁö ¾Ê´Â´Ù¸é (°¡´ÉÇÑ Á¶±ÝÀÌ¶óµµ |
| ¼º´ÉÀ» ³ôÀ̱âÀ§ÇØ ÀÌ ±ÛÀ» ÀÐ´Â´Ù¸é ¾Æ¸¶µµ ¸ðµâÀ» µ¿ÀûÀ¸·Î |
| ÀоîµéÀÌÁö ¾ÊÀ» °ÍÀÌ´Ù), ¼¹ö¸¦ ÄÄÆÄÀÏÇÒ¶§ |
| <code>-DDYNAMIC_MODULE_LIMIT=0</code>À» Ãß°¡ÇÑ´Ù. ±×·¯¸é |
| ¸ðµâÀ» µ¿ÀûÀ¸·Î ÀоîµéÀ̱âÀ§ÇØ ÇÒ´çÇÏ´Â ¸Þ¸ð¸®¸¦ Àý¾àÇÑ´Ù.</p> |
| |
| </section> |
| |
| </section> |
| |
| <section id="trace"> |
| |
| <title>ºÎ·Ï: ½Ã½ºÅÛÈ£Ãâ ±â·ÏÀ» ÀÚ¼¼È÷ ºÐ¼®Çϱâ</title> |
| |
| <p>´ÙÀ½Àº Solaris 8¿¡¼ worker MPMÀ» »ç¿ëÇÑ ¾ÆÆÄÄ¡ 2.0.38ÀÇ |
| ½Ã½ºÅÛÈ£Ãâ ±â·Ï(trace)ÀÌ´Ù. ¾Æ·¡ ¸í·É¾î¸¦ »ç¿ëÇÏ¿© ±â·ÏÀ» |
| ¾ò¾ú´Ù:</p> |
| |
| <example> |
| truss -l -p <var>httpd_child_pid</var>. |
| </example> |
| |
| <p><code>-l</code> ¿É¼ÇÀ» »ç¿ëÇϸé truss´Â ½Ã½ºÅÛÈ£ÃâÀ» |
| ÇÏ´Â LWP (lightweight process, °æ·®±Þ ÇÁ·Î¼¼½º--SolarisÀÇ |
| Ä¿³Î¼öÁØ ¾²·¹µå) ID¸¦ °°ÀÌ ±â·ÏÇÑ´Ù.</p> |
| |
| <p>´Ù¸¥ ½Ã½ºÅÛ¿¡´Â <code>strace</code>, <code>ktrace</code>, |
| <code>par</code> °°Àº ½Ã½ºÅÛÈ£Ãâ ÃßÀû µµ±¸°¡ ÀÖ´Ù. °á°ú´Â |
| ºñ½ÁÇÏ´Ù.</p> |
| |
| <p>Ŭ¶óÀ̾ðÆ®´Â À¥¼¹ö¿¡°Ô Å©±â°¡ 10KBÀÎ Á¤Àû ÆÄÀÏÀ» ¿äûÇÑ´Ù. |
| Á¤ÀûÀÎ ÆÄÀÏÀ» ¿äûÇÏÁö ¾Ê°Å³ª ³»¿ëÇù»óÇÏ´Â ¿äûÀ» ÇÑ °æ¿ì |
| ±â·ÏÀÌ ¸Å¿ì ´Ù¸£´Ù (¶§·Î´Â ¸Å¿ì ¾Ë¾Æº¸±â Èûµé´Ù).</p> |
| |
| <example> |
| <pre>/67: accept(3, 0x00200BEC, 0x00200C0C, 1) (sleeping...) |
| /67: accept(3, 0x00200BEC, 0x00200C0C, 1) = 9</pre> |
| </example> |
| |
| <p>À§¿¡¼ ¿¬°á´ë±â(listener) ¾²·¹µå°¡ LWP #67¿¡¼ ½ÇÇàµÊÀ» |
| ¾Ë ¼ö ÀÖ´Ù.</p> |
| |
| <note><code>accept(2)</code> Á÷·Äȸ¦ »ç¿ëÇÏÁö ¾ÊÀ½À» ÁÖ¸ñÇ϶ó. |
| ¿©·¯ Æ÷Æ®¸¦ ±â´Ù¸®Áö¾Ê´Â °æ¿ì ÀÌ Ç÷¡ÆûÀÇ worker MPMÀº |
| ±âº»ÀûÀ¸·Î Á÷·ÄÈÇÏÁö ¾ÊÀº accept¸¦ »ç¿ëÇÑ´Ù.</note> |
| |
| <example> |
| <pre>/65: lwp_park(0x00000000, 0) = 0 |
| /67: lwp_unpark(65, 1) = 0</pre> |
| </example> |
| |
| <p>¿¬°áÀº ¹Þ¾ÆµéÀÌ°í(accept) ¿¬°á´ë±â ¾²·¹µå´Â |
| worker ¾²·¹µå¸¦ ±ú¿ö¼ ¿äûÀ» ó¸®ÇÏ°Ô ÇÑ´Ù. ¾Æ·¡ ±â·Ï¿¡¼ |
| ¿äûÀ» ó¸®ÇÏ´Â worker ¾²·¹µå°¡ LWP #65ÀÓÀ» ¾Ë ¼ö ÀÖ´Ù.</p> |
| |
| <example> |
| <pre>/65: getsockname(9, 0x00200BA4, 0x00200BC4, 1) = 0</pre> |
| </example> |
| |
| <p>°¡»óÈ£½ºÆ®¸¦ ±¸ÇöÇϱâÀ§ÇØ ¾ÆÆÄÄ¡´Â ¿¬°áÀ» ¹Þ¾ÆµéÀÎ |
| Áö¿ª(local) ¼ÒÄÏ ÁÖ¼Ò¸¦ ¾Ë¾Æ¾ß ÇÑ´Ù. (°¡»óÈ£½ºÆ®¸¦ »ç¿ëÇÏÁö |
| ¾Ê°Å³ª <directive module="mpm_common">Listen</directive> |
| Áö½Ã¾î¿¡ ¿ÍÀϵåÄ«µå ÁÖ¼Ò¸¦ »ç¿ëÇÏÁö ¾ÊÀº °æ¿ì µî) ¸¹Àº °æ¿ì |
| ÀÌ È£ÃâÀ» ¾ø¾Ù ¼ö ÀÖ´Ù. ±×·¯³ª ¾ÆÁ÷ ÀÌ·± ÃÖÀûÈ ÀÛ¾÷ÀÌ |
| ¾ÈµÇÀÖ´Ù. </p> |
| |
| <example> |
| <pre>/65: brk(0x002170E8) = 0 |
| /65: brk(0x002190E8) = 0</pre> |
| </example> |
| |
| <p><code>brk(2)</code> È£ÃâÀº Èü(heap)¿¡¼ ¸Þ¸ð¸®¸¦ ÇÒ´çÇÑ´Ù. |
| À¥¼¹ö´Â ´ëºÎºÐÀÇ ¿äû 󸮽à ÀÚü ¸Þ¸ð¸® |
| ÇÒ´çÀÚ(<code>apr_pool</code>°ú <code>apr_bucket_alloc</code>)¸¦ |
| »ç¿ëÇϱ⶧¹®¿¡ ½Ã½ºÅÛÈ£Ãâ ±â·Ï¿¡¼ ÀÌ ½Ã½ºÅÛÈ£ÃâÀ» º¸±â°¡ |
| µå¹°´Ù. ÀÌ ±â·Ï¿¡¼ À¥¼¹ö´Â ½ÃÀÛÇÏÀÚ¸¶ÀÚ ÀÚü ¸Þ¸ð¸® ÇÒ´çÀÚ°¡ |
| »ç¿ëÇÒ ¸Þ¸ð¸®ºí·ÏÀ» ¾ò±âÀ§ÇØ <code>malloc(3)</code>À» È£ÃâÇÑ´Ù.</p> |
| |
| <example> |
| <pre>/65: fcntl(9, F_GETFL, 0x00000000) = 2 |
| /65: fstat64(9, 0xFAF7B818) = 0 |
| /65: getsockopt(9, 65535, 8192, 0xFAF7B918, 0xFAF7B910, 2190656) = 0 |
| /65: fstat64(9, 0xFAF7B818) = 0 |
| /65: getsockopt(9, 65535, 8192, 0xFAF7B918, 0xFAF7B914, 2190656) = 0 |
| /65: setsockopt(9, 65535, 8192, 0xFAF7B918, 4, 2190656) = 0 |
| /65: fcntl(9, F_SETFL, 0x00000082) = 0</pre> |
| </example> |
| |
| <p>´ÙÀ½ worker ¾²·¹µå´Â Ŭ¶óÀ̾ðÆ®ÀÇ ¿¬°á(ÆÄÀϱâ¼úÀÚ 9)À» |
| ´ë±â¾ÈÇÔ(non-blocking) »óÅ·Π¹Ù²Û´Ù. <code>setsockopt(2)</code>¿Í |
| <code>getsockopt(2)</code> È£ÃâÀº SolarisÀÇ libc°¡ ¼ÒÄÏ¿¡ |
| ´ëÇÑ <code>fcntl(2)</code>À» ¾î¶»°Ô ó¸®ÇÏ´ÂÁö º¸¿©ÁØ´Ù.</p> |
| |
| <example> |
| <pre>/65: read(9, " G E T / 1 0 k . h t m".., 8000) = 97</pre> |
| </example> |
| |
| <p>worker ¾²·¹µå´Â Ŭ¶óÀ̾ðÆ®·Î ºÎÅÍ ¿äûÀ» Àд´Ù.</p> |
| |
| <example> |
| <pre>/65: stat("/var/httpd/apache/httpd-8999/htdocs/10k.html", 0xFAF7B978) = 0 |
| /65: open("/var/httpd/apache/httpd-8999/htdocs/10k.html", O_RDONLY) = 10</pre> |
| </example> |
| |
| <p>À¥¼¹ö ¼³Á¤Àº <code>Options FollowSymLinks</code>¿Í |
| <code>AllowOverride None</code>ÀÌ´Ù. ±×·¡¼ ¿äûÇÑ ÆÄÀÏ°æ·ÎÀÇ |
| °¢ µð·ºÅ丮¿¡ ´ëÇØ <code>lstat(2)</code>Çϰųª |
| <code>.htaccess</code> ÆÄÀÏÀ» °Ë»çÇÒ ÇÊ¿ä°¡ ¾ø´Ù. ÆÄÀÏÀ» |
| °Ë»çÇϱâÀ§ÇØ, 1) ÆÄÀÏÀÌ ÀÖ´ÂÁö, 2) µð·ºÅ丮°¡ ¾Æ´Ñ ÀϹÝÆÄÀÏÀÎÁö, |
| <code>stat(2)</code> È£Ã⸸ ÇÏ¸é µÈ´Ù.</p> |
| |
| <example> |
| <pre>/65: sendfilev(0, 9, 0x00200F90, 2, 0xFAF7B53C) = 10269</pre> |
| </example> |
| |
| <p>ÀÌ °æ¿ì À¥¼¹ö´Â ÇѹøÀÇ <code>sendfilev(2)</code> ½Ã½ºÅÛÈ£Ãâ·Î |
| HTTP ÀÀ´äÇì´õ¿Í ¿äûÇÑ ÆÄÀÏÀ» Àü¼ÛÇÒ ¼ö ÀÖ´Ù. Sendfile Áö¿ø¿©ºÎ´Â |
| ¿î¿µÃ¼Á¦¸¶´Ù ´Ù¸£´Ù. ´Ù¸¥ ½Ã½ºÅÛÀ̶ó¸é <code>sendfile(2)</code>À» |
| È£ÃâÇϱâ Àü¿¡ Çì´õ¸¦ º¸³»±âÀ§ÇØ <code>write(2)</code>³ª |
| <code>writev(2)</code> È£ÃâÀ» ÇÑ´Ù.</p> |
| |
| <example> |
| <pre>/65: write(4, " 1 2 7 . 0 . 0 . 1 - ".., 78) = 78</pre> |
| </example> |
| |
| <p><code>write(2)</code> È£ÃâÀº Á¢±Ù·Î±×(access log)¿¡ ¿äûÀ» |
| ±â·ÏÇÑ´Ù. ÀÌ ±â·Ï¿¡ <code>time(2)</code> È£ÃâÀÌ ¾øÀ½À» ÁÖ¸ñÇ϶ó. |
| ¾ÆÆÄÄ¡ 1.3°ú ´Þ¸® ¾ÆÆÄÄ¡ 2.0Àº ½Ã°£À» ¾Ë±âÀ§ÇØ |
| <code>gettimeofday(3)</code>¸¦ »ç¿ëÇÑ´Ù. |
| <code>gettimeofday</code>¸¦ ÃÖÀûÈÇÑ ¸®´ª½º¿Í Solaris °°Àº |
| ¸î¸î ¿î¿µÃ¼Á¦¿¡¼´Â ÀϹÝÀûÀÎ ½Ã½ºÅÛÈ£Ã⠺δãÀÌ ¾ø´Ù.</p> |
| |
| <example> |
| <pre>/65: shutdown(9, 1, 1) = 0 |
| /65: poll(0xFAF7B980, 1, 2000) = 1 |
| /65: read(9, 0xFAF7BC20, 512) = 0 |
| /65: close(9) = 0</pre> |
| </example> |
| |
| <p>worker ¾²·¹µå´Â ¿¬°áÀ» Áö¿¬´Ý±â(lingering close)ÇÑ´Ù.</p> |
| |
| <example> |
| <pre>/65: close(10) = 0 |
| /65: lwp_park(0x00000000, 0) (sleeping...)</pre> |
| </example> |
| |
| <p>¸¶Áö¸·À¸·Î worker ¾²·¹µå´Â ¹æ±Ý Àü¼ÛÇÑ ÆÄÀÏÀ» ´Ý°í, |
| ¿¬°á´ë±â(listener) ¾²·¹µå°¡ ´Ù¸¥ ¿¬°áÀ» ÇÒ´çÇÒ ¶§±îÁö |
| Á¤ÁöÇÑ´Ù.</p> |
| |
| <example> |
| <pre>/67: accept(3, 0x001FEB74, 0x001FEB94, 1) (sleeping...)</pre> |
| </example> |
| |
| <p>±×µ¿¾È ¿¬°á´ë±â ¾²·¹µå´Â ¿¬°áÀ» (¸ðµç worker°¡ ÀÛ¾÷ÁßÀ̸é |
| ¿¬°á´ë±â ¾²·¹µå¸¦ ¸ØÃß´Â worker MPMÀÇ È帧Á¦¾î ±â´É¿¡ µû¶ó) |
| worker ¾²·¹µå¿¡ ÇÒ´çÇÏÀÚ¸¶ÀÚ ´Ù¸¥ ¿¬°áÀ» ¹Þ¾ÆµéÀÏ ¼ö ÀÖ´Ù. |
| ÀÌ ±â·Ï¿¡´Â ³ª¿ÀÁö ¾ÊÁö¸¸, worker ¾²·¹µå°¡ ¹æ±Ý ¹ÞÀº ¿¬°áÀ» |
| ó¸®ÇÏ´Â µ¿¾È ´ÙÀ½ <code>accept(2)</code>°¡ (¿äûÀÌ ¸Å¿ì |
| ¸¹Àº °æ¿ì Ç×»ó) ÀϾ ¼ö ÀÖ´Ù.</p> |
| |
| </section> |
| |
| </manualpage> |
| |
