Re: [Geoserver-users] Too many open files

[Luís de S. <lui...@gm...>]

Daniele, thank you for your reply. Let's see if I got it right:

ImageReader.red - relies more on the file system, good if the server has
restrained RAM;

JAI - relies more on memory, good if the server has enough resources and
usage load is heavier.

Daniele, if I should have read this in the man pages before asking it here,
please don't exitate pointing me there :)

Thanks once more,

Luís


2010/7/28 Daniele Romagnoli <dan...@ge...>

> Hi Luis,
> You can try by setting it to false. The choice may depend on which type of
> mosaic you are configuring.
> Let me provide some additional details.
>
> When it is set to false, the imageMosaic invokes an
> ImageReader.read(imageIndex, ImageReadParam) operations which use the
> Immediate Model and load the requested part of the image in memory (in
> compliance with imageIndex and imageReadParam). After this, it disposes the
> reader and closes the stream.
>
> When it is set to true, the imageMosaic uses JAI ImageRead operations which
> is based on the Deferred Execution Model. The Deferred Execution Model
> leverages on TileCaches and TileSchedulers to load Tiles (composing the
> requested image) in memory only when they are really needed (as an instance
> on rendering request). The reader is not explicitly closed.
>
> Hope this helps.
> Daniele
>
>
> 2010/7/28 Luís de Sousa <lui...@gm...>
>
>> Hi Daniele,
>>
>>
>> It was left with the default value 'true'. Do you recomend setting it to
>> 'false'? should I always use it like this? what are the consequences?
>>
>> Thank you,
>>
>> Luís
>>
>>
>>
>> 2010/7/28 Daniele Romagnoli <dan...@ge...>
>>
>> Hi Luis,
>>> How do you have configured the layer for that mosaic? Is the
>>> USE_JAI_IMAGEREAD parameter set to true?
>>> In that case, setting it to false may help you since the manual read
>>> closes the open files when done.
>>>
>>> Please, let me know.
>>> Regards,
>>> Daniele
>>>
>>>
>>>
>
>
> --
> -------------------------------------------------------
> Eng. Daniele Romagnoli
> Software Engineer
>
> GeoSolutions S.A.S.
> Via Carignoni 51
> 55041 Camaiore (LU)
> Italy
>
> phone: +39 0584983027
> fax:     +39 0584983027
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>
>
> http://www.geo-solutions.it
>
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