[Mapserver-users] Raster Image Limitation

[Ed McNierney]

Rene -

If the problem crops up with the high-resolution data only (i.e. the ECW
data) I would look to ECW first.  We certainly run several hundred users
at a time on a database of several hundred thousand raster images and
have no problems like you report; we do not, however, use ECW.

	- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
ed at topozone.com
(978) 251-4242  

-----Original Message-----
From: Rene Teniere [mailto:TENIERER at gov.ns.ca] 
Sent: Thursday, April 15, 2004 10:21 AM
To: gerry.creager at tamu.edu
Cc: mapserver-users at lists.gis.umn.edu
Subject: [Mapserver-users] Raster Image Limitation

Gerry,

I'll have to forward this off to the network admin in order to get those
answers for you.

Rene

>>> Gerry Creager N5JXS <gerry.creager at tamu.edu> 2004-04-15 11:03:04 AM
>>>
What are the particulars on the server?  Also, are you backing up to a

database, or is this solely the rasters?  (Sorry, I'm looking at it now,
but I've not had time to grok it all)... I'm thinking "Server" at this

point, as you're moving a lot of bits and thus have a lot of diskIO.

If you're talking 'bout a SCSI-based RAID5, you've got some of the
overhead covered.  If you're using a slow IDE disk, it's a lot worse.

Gerry

Rene Teniere wrote:
> Hi All,
> 
> We have a site that we want to go public (built using Chameleon
because
> my coded site is not ready yet and this had to be out ASAP) that uses
a
> lot of rasters (410 indexed ecw's @ 18 - 25mb each). There are 4
other
> full images at much lower resolution that are scale dependent, once
you
> reach a certain scale the high res stuff kicks in. The problem is
that
> it works fine with one person, when multiple people use it, it craps 
> out. We tested it out and it seems that it can only handle four high
res
> images at a time. Is this MapServer, ecw, or a server problem? Here
is
> the site:
> 
> http://nfis.gov.ns.ca/gmap/juan/index.phtml
> 
> Thanks for your time,
> 
> Rene
> 
> _______________________________________________
> Mapserver-users mailing list
> Mapserver-users at lists.gis.umn.edu
> http://lists.gis.umn.edu/mailman/listinfo/mapserver-users

--
Gerry Creager -- gerry.creager at tamu.edu 
Network Engineering -- AATLT, Texas A&M University	
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
Page: 979.228.0173
Office: 903A Eller Bldg, TAMU, College Station, TX 77843

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