<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.2900.2627" name=GENERATOR></HEAD>
<BODY>
<DIV dir=ltr align=left><SPAN class=123445816-24052005><FONT face=Arial
color=#0000ff size=2>Ken -</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=123445816-24052005><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=123445816-24052005><FONT face=Arial
color=#0000ff size=2>If you are trying to serve multiple simultaneous requests,
with everything competing to write and then read files from the temp directory,
the disk I/O to that drive can become a <STRONG>serious</STRONG>
bottleneck. If heavy usage is not a concern, then this may be a
non-issue.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=123445816-24052005><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=123445816-24052005><FONT face=Arial
color=#0000ff size=2>I have never seen failures due to MODE=MAP (rather than
being caused by something else) and I've used it about a billion times
(literally <g>). I would be leery of blaming failures on MODE=MAP
without some diagnosis about the cause.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=123445816-24052005><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=123445816-24052005><FONT face=Arial
color=#0000ff size=2> - Ed</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=123445816-24052005>
<P><FONT size=2>Ed McNierney<BR>President and Chief Mapmaker<BR>TopoZone.com /
Maps a la carte, Inc.<BR>73 Princeton Street, Suite 305<BR>North Chelmsford,
MA 01863<BR>ed@topozone.com<BR>(978) 251-4242 </FONT></P></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> UMN MapServer Users List
[mailto:MAPSERVER-USERS@LISTS.UMN.EDU] <B>On Behalf Of </B>Ken
Lord<BR><B>Sent:</B> Tuesday, May 24, 2005 12:48 PM<BR><B>To:</B>
MAPSERVER-USERS@LISTS.UMN.EDU<BR><B>Subject:</B> Re: [UMN_MAPSERVER-USERS]
Cleaning the /tmp directory<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>James,</DIV>
<DIV> </DIV>
<DIV>I use the method you mentioned, 'MODE=MAP', to generate snapshots for query
results. It works great to highlight each individual item returned by
a map query, placed next each item's attributes.</DIV>
<DIV> </DIV>
<DIV>However, Since mapserver 4 and later have come out, often the
images fail despite the log statement of 'normal execution'.</DIV>
<DIV> </DIV>
<DIV>I have simplified the maps as much as possible, and I'm sure that its
not a lingering syntax difference between 3.6 (where it worked great) and 4 or
later. The failures are not consistant either. Why they don't either
all work or all fail, or at least all the same features queried fail
consistantly? I have no idea. </DIV>
<DIV> </DIV>
<DIV>So I'm leary about suggesting people use MODE=MAP for all their maps just
to keep their temp folder's empty, especially when a simple .bat file can be
used to empty them regularly.</DIV>
<DIV> </DIV>
<DIV>Cheers,</DIV>
<DIV>Ken Lord</DIV>
<DIV>Vancouver BC</DIV>
<DIV> </DIV></BODY></HTML>