<!-- Presentation generated by Internet Assistant for Microsoft PowerPoint 97 -->
<HTML>
<HEAD>
<meta name="GENERATOR" content="Microsoft Internet Assistant for Microsoft PowerPoint 97">
<TITLE>The practical realities</TITLE>
</HEAD>
<BODY >
<CENTER>
<TABLE WIDTH=100%>
<TR> <TD WIDTH=100% ALIGN=CENTER>
<A HREF="sld001.htm">First</A>
<A HREF="sld069.htm">Previous</A>
<A HREF="sld071.htm">Next</A>
<A HREF="sld080.htm">Last</A>
<A HREF="index.htm">Index</A>
<A HREF="http://dbi.perl.org">Home</A>
<A HREF="tsld070.htm">Text</A>
</TD> </TR>
<TR> <TD WIDTH=100% ALIGN=CENTER>
<IMG SRC="img070.gif" usemap="#Objmap" WIDTH=800 HEIGHT=600 BORDER=0>
</TD> </TR>
</TABLE>
<P>Slide 70 of 80</P>
</CENTER>
<!-- <UL>
<H2>The practical realities</H2>
</UL></P>
<P><UL>
<LI><H2>Modes of operation
</H2>
<UL>
<LI>Multi-threaded Mode - one thread per connection
<UL>
<LI>Not safe for production use with perl 5.5 threads, untested with 5.6 ithreads
<LI>DBI is thread-safe but not thread-hot
</UL><LI>Forking Mode - one process per connection
<UL>
<LI>Most practical mode for UNIX-like systems
<LI>Doesnt scale to large numbers of connections
<LI>Not available on Windows prior to Perl 5.6.0
<LI>Fork emulation in Perl 5.6.0 not tested with DBI yet
</UL><LI>Single Connection Mode - one one connection supported
<UL>
<LI>Obviously only of limited use
</UL></UL></UL><UL>
<LI><H2>No round-robin mode available yet
</H2>
<UL>
<LI>patches welcome</UL></UL></P>
<P> -->
</Body>
</HTML>