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<html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><!--Converted with jLaTeX2HTML 2002 (1.62) JA patch-1.4patched version by: Kenshi Muto, Debian Project.LaTeX2HTML 2002 (1.62),original version by: Nikos Drakos, CBLU, University of Leeds* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>36.9 Http trace format</TITLE><META NAME="description" CONTENT="36.9 Http trace format"><META NAME="keywords" CONTENT="everything"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="jLaTeX2HTML v2002 JA patch-1.4"><META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"><LINK REL="STYLESHEET" HREF="everything.css" tppabs="http://www.isi.edu/nsnam/ns/doc/everything.css"><LINK REL="next" HREF="node522.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node522.html"><LINK REL="previous" HREF="node520.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node520.html"><LINK REL="up" HREF="node490.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node490.html"><LINK REL="next" HREF="node522.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node522.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html9405" HREF="node522.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node522.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html9399" HREF="node490.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node490.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html9393" HREF="node520.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node520.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html9401" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html9403" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html9406" HREF="node522.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node522.html">36.10 Commands at a</A><B> Up:</B> <A NAME="tex2html9400" HREF="node490.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node490.html">36. Web cache as</A><B> Previous:</B> <A NAME="tex2html9394" HREF="node520.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node520.html">36.8 Putting together: a</A>   <B> <A NAME="tex2html9402" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html9404" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H1><A NAME="SECTION07290000000000000000"></A><A NAME="sec:webcache-trace"></A><BR>36.9 Http trace format</H1><P>The trace file of Http agents are constructed in a similar way as theSRM trace files. It consists of multiple entries, each of whichoccupies one line. The format of each entry is:<P><TABLE CELLPADDING=3 BORDER="1"><TR><TD ALIGN="CENTER">Time</TD><TD ALIGN="CENTER">ObjectID</TD><TD ALIGN="CENTER">Object Values</TD></TR></TABLE><P>There are three types of objects: client (<B>C</B>), cache (<B>E</B>)and server (<B>S</B>). Following is a complete enumeration of all possible events and value types associated with these three types of objects.<P><DIV ALIGN="CENTER"><TABLE CELLPADDING=3 BORDER="1"><TR><TD ALIGN="CENTER"><I>Object Type</I></TD><TD ALIGN="CENTER"><I>Event Type</I></TD><TD ALIGN="LEFT"><I>Values</I></TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">HIT</TD><TD ALIGN="LEFT">Prefix</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">MISS</TD><TD ALIGN="LEFT">Prefix z RequestSize</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">IMS</TD><TD ALIGN="LEFT">Prefix z Size t CacheEntryTime</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">REF</TD><TD ALIGN="LEFT">p PageID s ServerID z Size</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">UPD</TD><TD ALIGN="LEFT">p PageID m LastModifiedTime z PageSize</TD></TR><TR><TD ALIGN="CENTER"> </TD><TD ALIGN="CENTER"> </TD><TD ALIGN="LEFT">s ServerID</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">GUPD</TD><TD ALIGN="LEFT">z PageSize</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">SINV</TD><TD ALIGN="LEFT">p PageID m LastModTime z PageSize</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">GINV</TD><TD ALIGN="LEFT">p PageID m LastModTime</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">SPF</TD><TD ALIGN="LEFT">p PageID c DestCache</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">RPF</TD><TD ALIGN="LEFT">p PageID c SrcCache</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">ENT</TD><TD ALIGN="LEFT">p PageID m LastModifiedTime z PageSize</TD></TR><TR><TD ALIGN="CENTER"> </TD><TD ALIGN="CENTER"> </TD><TD ALIGN="LEFT">s ServerID</TD></TR><TR><TD ALIGN="CENTER">C</TD><TD ALIGN="CENTER">GET</TD><TD ALIGN="LEFT">p PageID s PageServerID z RequestSize</TD></TR><TR><TD ALIGN="CENTER">C</TD><TD ALIGN="CENTER">STA</TD><TD ALIGN="LEFT">p PageID s OrigServerID l StaleTime</TD></TR><TR><TD ALIGN="CENTER">C</TD><TD ALIGN="CENTER">RCV</TD><TD ALIGN="LEFT">p PageID s PageServerID l ResponseTime z PageSize</TD></TR><TR><TD ALIGN="CENTER">S</TD><TD ALIGN="CENTER">INV</TD><TD ALIGN="LEFT">p PageID m LastModifiedTime z Size</TD></TR><TR><TD ALIGN="CENTER">S</TD><TD ALIGN="CENTER">UPD</TD><TD ALIGN="LEFT">p PageID m LastModifiedTime z Size</TD></TR><TR><TD ALIGN="CENTER">S</TD><TD ALIGN="CENTER">SND</TD><TD ALIGN="LEFT">p PageID m LastModifiedTime z PageSize</TD></TR><TR><TD ALIGN="CENTER"> </TD><TD ALIGN="CENTER"> </TD><TD ALIGN="LEFT">t Requesttype</TD></TR><TR><TD ALIGN="CENTER">S</TD><TD ALIGN="CENTER">MOD</TD><TD ALIGN="LEFT">p PageID n NextModifyTime</TD></TR></TABLE></DIV><P>Prefix is the information common to all trace entries. It includes:<P><DIV ALIGN="CENTER"><TABLE CELLPADDING=3 BORDER="1"><TR><TD ALIGN="CENTER">p PageID</TD><TD ALIGN="CENTER">c RequestClientID</TD><TD ALIGN="CENTER">s PageServerID</TD></TR></TABLE></DIV><P><I>Short Explaination of event operations</I>: <P><DIV ALIGN="CENTER"><TABLE CELLPADDING=3 BORDER="1"><TR><TD ALIGN="CENTER"><I>Object Type</I></TD><TD ALIGN="CENTER"><I>Event Type</I></TD><TD ALIGN="LEFT"><I>Explaination</I></TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">HIT</TD><TD ALIGN="LEFT">Cache hit. PageSererID is the id of the ``owner'' of the page.</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">MISS</TD><TD ALIGN="LEFT">Cache miss. In this case the cache will send a request to the server to fetch the page.</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">IMS</TD><TD ALIGN="LEFT">If-Modified-Since. Used by TTL procotols to validate an expired page.</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">REF</TD><TD ALIGN="LEFT">Page refetch. Used by invalidation protocols to refetch an invalidated page.</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">UPD</TD><TD ALIGN="LEFT">Page update. Used by invalidation protocols to ``push'' updates</TD></TR><TR><TD ALIGN="CENTER"> </TD><TD ALIGN="CENTER"> </TD><TD ALIGN="LEFT">from parent cache to children caches.</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">SINV</TD><TD ALIGN="LEFT">Send invalidation.</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">GINV</TD><TD ALIGN="LEFT">Get invalidation.</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">SPF</TD><TD ALIGN="LEFT">Send a pro forma</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">RPF</TD><TD ALIGN="LEFT">Receive a pro forma</TD></TR><TR><TD ALIGN="CENTER">E</TD><TD ALIGN="CENTER">ENT</TD><TD ALIGN="LEFT">Enter a page into local page cache.</TD></TR><TR><TD ALIGN="CENTER">C</TD><TD ALIGN="CENTER">GET</TD><TD ALIGN="LEFT">Client sends a request for a page.</TD></TR><TR><TD ALIGN="CENTER">C</TD><TD ALIGN="CENTER">STA</TD><TD ALIGN="LEFT">Client gets a stale hit. OrigModTime is the modification time</TD></TR><TR><TD ALIGN="CENTER"> </TD><TD ALIGN="CENTER"> </TD><TD ALIGN="LEFT">in the web server, CurrModTime is the local page's modification time.</TD></TR><TR><TD ALIGN="CENTER">C</TD><TD ALIGN="CENTER">RCV</TD><TD ALIGN="LEFT">Client receives a page.</TD></TR><TR><TD ALIGN="CENTER">S</TD><TD ALIGN="CENTER">SND</TD><TD ALIGN="LEFT">Server send a response.</TD></TR><TR><TD ALIGN="CENTER">S</TD><TD ALIGN="CENTER">UPD</TD><TD ALIGN="LEFT">Server pushes a page update to its ``primary cache''. Used by invalidation protocol only.</TD></TR><TR><TD ALIGN="CENTER">S</TD><TD ALIGN="CENTER">INV</TD><TD ALIGN="LEFT">Server sends an invalidation message. Used by invalidation protocol only.</TD></TR><TR><TD ALIGN="CENTER">S</TD><TD ALIGN="CENTER">MOD</TD><TD ALIGN="LEFT">Server modified a page. The page will be modified next at NextModifyTime.</TD></TR></TABLE></DIV><P><HR><!--Navigation Panel--><A NAME="tex2html9405" HREF="node522.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node522.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html9399" HREF="node490.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node490.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html9393" HREF="node520.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node520.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html9401" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html9403" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html9406" HREF="node522.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node522.html">36.10 Commands at a</A><B> Up:</B> <A NAME="tex2html9400" HREF="node490.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node490.html">36. Web cache as</A><B> Previous:</B> <A NAME="tex2html9394" HREF="node520.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node520.html">36.8 Putting together: a</A>   <B> <A NAME="tex2html9402" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html9404" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <!--End of Navigation Panel--><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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