MapServer performance

[antti siukola]

Hi!

The tiff's are stored on a RAID stack on the same server and the
filesystem is ext3. I don't have very detailed description to give
since I'm not administrating the server or have ever even seen it :)

Antti S

On 3/23/07, Ed McNierney <ed at topozone.com> wrote:
> Antti -
>
> 1 GB of RAM is not a lot for dealing with large raster files.  Could you
> describe your hard disk subsystem in detail?  What kind of hardware are you
> using to store the TIFF images?
>
>      - Ed
>
> --
> Ed McNierney
> President and Chief Mapmaker
> Maps a la carte, Inc. / TopoZone.com
> 73 Princeton Street, Suite 305
> North Chelmsford, MA  01863
> Phone: (978) 251-4242
> Fax: (978) 251-1396
> ed at topozone.com
>
> > From: antti siukola <siukola.antti at GMAIL.COM>
> > Reply-To: antti siukola <siukola.antti at GMAIL.COM>
> > Date: Fri, 23 Mar 2007 11:11:18 +0200
> > To: <MAPSERVER-USERS at LISTS.UMN.EDU>
> > Subject: Re: [UMN_MAPSERVER-USERS] MapServer performance
> >
> > Hi!
> >
> > Thanks for the reply!
> >
> > My tiff's are from 15M to 10G tiff tiles (about 500M each tile) and
> > depending on the map theres the one 15M tiff or from 2 to 3 of the
> > 500M tiles displayed (I have couple of map apps running on the
> > server). It doesn't seem to matter how big the tiff's are since the
> > performance is the quite the same. I also have the .shx files for my
> > shape's.
> >
> > The server doesn't get very much hit's since it's not an open for
> > public application. I believe the average usage is about 1-10 users at
> > the same time.
> >
> > Hope this helps!
> >
> > Antti S
> >
> > On 3/21/07, Romolo Manfredini <romoloman at hotmail.com> wrote:
> >> From: "antti siukola" :
> >>
> >>> Oh, yes. I'm on linux with mapserver 4.8.4 and php mapscript. The
> >>> server is quite new and powerful with dual xeon and 1024M of memory.
> >>> Data sources are mostly SHP-files and few TABs for vector data and
> >>> labels. The actual maps are .tif images. I'm using tiled tiff's and
> >>> low-res images on upper scales.
> >>>
> >>
> >> SHP and tiff files are typically bad beast to manage expecially if they are
> >> big shape and big tiff, also dependig on file system type you may have some
> >> performance issues related to locking and caching. (1 GB ram with large
> >> files is not so much)
> >> Also, do you have spatial index on your files (.shx) ?
> >> Spatial index improve performances a lot.
> >> May you tell me the size of your files and how many of them are involved in
> >> a single map ?
> >>
> >> Best Regards,
> >> Romolo
> >>
> >>
>
>