Hi! We have tested with six layers: five Oracle DB layers and a ECW
mosaic. GeoWebCache stores tiles in the same machine where Geoserver
instances run.
We generated "data" tiles in PNG (palette safe) and images in JPEG. I'm not
sure about the type of these images. I give you the result of the gdalinfo,
I hope it is useful:
gdalinfo 2400_1338.jpeg
Driver: JPEG/JPEG JFIF
Size is 512, 512
Coordinate System is `'
Corner Coordinates:
Upper Left ( 0.0, 0.0)
Lower Left ( 0.0, 512.0)
Upper Right ( 512.0, 0.0)
Lower Right ( 512.0, 512.0)
Center ( 256.0, 256.0)
Band 1 Block=512x1 Type=Byte, ColorInterp=Red
Band 2 Block=512x1 Type=Byte, ColorInterp=Green
Band 3 Block=512x1 Type=Byte, ColorInterp=Blue
Thanks
2010/10/1 <[email protected]>
> Some additional questions.
>
> You wrote about tiles, so you are talking about raster/image data ?
>
> Where are your tiles stored. On a shared drive or in a database ?
>
> if you use a database, which one ?
>
> Are your tiles multiband images or images with a color table. If you are
> unsure, send me the output of
> gdalinfo yourtile.png. I achieved a performance boost when switching from
> multiband images to images with a color table.
>
> Cheers
> Christian
>
>
>
>
>
> Quoting DGIS Devels <[email protected]>:
>
> Hi, we have a question about Geoserver performance.
>>
>> We have been trying for a couple of months to find a good configuration
>> that
>> offers a solution to our use case. You can see our current architecture in
>> the attachment:
>> - WebLogic cluster with 2 machines and 4 managed servers (2 per machine).
>> We
>> have tested it whit JRockit and Sun JVM.
>> - 4 Geoservers (one per managed server)
>> - 2 GeoWebCaches (one per machine)
>> - A software balancer which balances requests between GeoWebCaches and
>> Geoservers
>>
>> We've testing too with a lot of values c for parameters like memory,
>> render
>> memory, timeouts, DB connections ...
>>
>> Our goal is to support 85 concurrent users performing an average of 5 map
>> requests (near of 100 256x256 tiles) in a time of 10 minutes. It must be
>> equivalent, according to our calculations, to respond to some 85000
>> requests
>> in those 10 minutes.
>>
>> So far, the max number of request we've been able to response is about
>> 30000
>> tiles. In most cases, some GeoServers or GeoWebCaches instances crashes.
>>
>> Anybody has made similar tests? Do you think is possible to reach a
>> similar
>> performance?
>>
>>
>
>
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