Sophie: mnogosearch-3.3.8-3mdv2010.0 i586

mnogosearch-3.3.8-3mdv2010.0.i586.rpm

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> 3.3.8 reference manual: Full-featured search engine software</TH
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CLASS="sect1"
><H1
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><A
NAME="stored"
>Cached copies
    <A
NAME="AEN2001"
></A
></A
></H1
><P
>&#13;    Starting from the version 3.2.2
    <SPAN
CLASS="application"
>mnoGoSearch</SPAN
>
    is able to store compressed copies of the indexed
    documents, so called <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>cached copies</I
></SPAN
>.
    Cached copies are stored in the same
    <ACRONYM
CLASS="acronym"
>SQL</ACRONYM
> database.
  </P
><P
>&#13;    <SPAN
CLASS="application"
>search.cgi</SPAN
>
    uses cached copies for two purposes:
    <P
></P
><OL
TYPE="1"
><LI
><P
>&#13;          To display smart excerpts from every
          found document with the search query
          words in their context.
          
        </P
></LI
><LI
><P
>&#13;         To display the entire original copy of the document,
         with the search words highlighted.
         <DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
           A cached copy is opened in the browser when 
           the user clicks on the
           <TT
CLASS="literal"
>Display cached copy</TT
> link
           near every document in search results.
           </P
></BLOCKQUOTE
></DIV
>
         Watching a cached copy can be especially useful
         when the original site is temporarily down
         or the document does not exist any longer.
        </P
></LI
></OL
>
  </P
><P
>&#13;    Cached copies are displayed by with help of
    <SPAN
CLASS="application"
>search.cgi</SPAN
>
    executed with a special <ACRONYM
CLASS="acronym"
>HTTP</ACRONYM
>
    query string parameter.
    <SPAN
CLASS="application"
>search.cgi</SPAN
>
    fetches a cached copy of the document
    from the <ACRONYM
CLASS="acronym"
>SQL</ACRONYM
> database, decompresses it,
    and the document is displayed in your web
    browser, with search keywords highlighted.
  </P
><P
>&#13;   To enable cached copies support, compile
   <SPAN
CLASS="application"
>mnoGoSearch</SPAN
> with <TT
CLASS="literal"
>zlib</TT
> support:
<PRE
CLASS="programlisting"
>&#13;     ./configure --with-zlib &#60;other arguments&#62;
</PRE
>
  </P
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="stored-start"
>Configuring cached copies</A
></H2
><P
>&#13;      Collecting cached copies is enabled in the default version
      of <TT
CLASS="filename"
>indexer.conf</TT
> using this line:
<PRE
CLASS="programlisting"
>&#13;      Section CachedCopy 0 64000
</PRE
>
    </P
><P
>&#13;      The number <TT
CLASS="literal"
>64000</TT
> is the maximum
      allowed cached copy size.
      When crawling, <SPAN
CLASS="application"
>indexer</SPAN
> stores
      a cached copy only if its compressed size is smaller
      than the maximum allowed size. You can change
      this number according to your needs and your
      <ACRONYM
CLASS="acronym"
>SQL</ACRONYM
> database capabilities.
      <DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
      Storing too large cached copies can affect 
      search performance negatively.
      </P
></BLOCKQUOTE
></DIV
>
    </P
><P
>&#13;     You can disable collecting cached copies:
     open <TT
CLASS="filename"
>indexer.conf</TT
>
     in your favorite text editor and delete
     the <TT
CLASS="literal"
>Section CachedCopy</TT
> line.
     Disabling cached copies will save disk space,
     however search results presentation will be
     not as good as with cached copies enabled.
    </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="stored-search"
>Using cached copies at search time</A
></H2
><P
>&#13;      Displaying cached copies is enabled
      in the default search result template <TT
CLASS="filename"
>search.htm-dist</TT
>.
      To check if your template enables displaying
      cached copies, open the template in a text
      editor and make sure that you have this
      <ACRONYM
CLASS="acronym"
>HTML</ACRONYM
> code in the section
      <TT
CLASS="literal"
>&#60;!--res--&#62;</TT
>:
<PRE
CLASS="programlisting"
>&#13;&#60;A HREF="$(stored_href)"&#62;Display cached copy&#60;/A&#62;
</PRE
>
    </P
><P
>&#13;    When using the default search template,
    <SPAN
CLASS="application"
>search.cgi</SPAN
> refers
    to itself recursively, that is it when you follow
    the <TT
CLASS="literal"
>Display Cached Copy</TT
>
    link in your browser, you'll open
    <SPAN
CLASS="application"
>search.cgi</SPAN
> again
    (just with special query string parameters
     which tell to display a cached copy rather
    than search results).
    </P
><P
>After cached copies have been configured, it works in the following order during search time:</P
><P
></P
><OL
TYPE="1"
><LI
><P
>&#13;            For each document a link to its cached copy is displayed;
          </P
></LI
><LI
><P
>When the user clicks the link,
      <SPAN
CLASS="application"
>search.cgi</SPAN
> is executed. It sends a query
       to the <ACRONYM
CLASS="acronym"
>SQL</ACRONYM
> database and fetches the cached copy content.
    </P
></LI
><LI
><P
>&#13;      <SPAN
CLASS="application"
>search.cgi</SPAN
> decompresses
      the requested cached copy and sends it to the web browser,
      highlighting the search keywords using the highlighting method given in
      the <A
HREF="msearch-cmdref-hlbeg.html"
>HlBeg</A
> and <A
HREF="msearch-cmdref-hlend.html"
>HlEnd</A
>
      commands;
    </P
></LI
></OL
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="stored-distributed"
>Moving cached copies to another machine</A
></H2
><P
>&#13;    You can optionally specify an alternative
    <ACRONYM
CLASS="acronym"
>URL</ACRONYM
> for the <TT
CLASS="literal"
>Display Cached Copy</TT
>
    links, to have cached copies reside under another location
    of the same server, or even on another physical server.
    For example:
<PRE
CLASS="programlisting"
>&#13;&#60;A HREF="http://site2/cgi-bin/search.cgi?$(stored_href)"&#62;Display cached copy&#60;/A&#62;
</PRE
>

    Moving cached copies to another server can be useful
    to distribute <ACRONYM
CLASS="acronym"
>CPU</ACRONYM
> load between machines.
      <DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
        <SPAN
CLASS="application"
>mnoGoSearch</SPAN
> must be
        installed on the machine <TT
CLASS="literal"
>site2</TT
>.
      </P
></BLOCKQUOTE
></DIV
>
    </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="stored-remote"
>Using the original document as a cached copy source</A
></H2
><P
>&#13;    Starting from the version <TT
CLASS="literal"
>3.3.8</TT
>,
    <SPAN
CLASS="application"
>mnoGoSearch</SPAN
> understands
    the <A
HREF="msearch-cmdref-uselocalcachedcopy.html"
>UseLocalCachedCopy</A
> command
    in <TT
CLASS="filename"
>search.htm</TT
> to force downloading
    documents from their original locations when generating
    <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>smart excerpts</I
></SPAN
> for search results
    as well as when generating the "<SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>Cached Copy</I
></SPAN
>"
    documents.
    This command can be useful when you index the documents
    residing on your local file system and helps to avoid 
    storing of cached copies in the database and thus
    makes the database smaller. 
    </P
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