2012/2/14 Sebjørn Birkeland <[email protected]>
> Hi Andrea,
>
> Thank you for your answer.
>
> We have tried removing all the jar-files related to GWC, and this seems to
> work. For the moment, this is ok, but we are not sure how we can find good
> long term solution to this. At some point we need to be able to run GS with
> GWC on our Weblogic-servers. Is the solution to use stand-alone GWC-s, or
> will this give us the same result? Perhaps someone else has GS/GWC running
> on Weblogic and can give us some input?
>
Yes, use standalong gwc as front end to your clustered geoservers. A single
gwc instance can round robin requests to various wms's. Just add multiple
elements to the wmsLayer wmsUrl property:
<wmsUrl>
<string>http://geoserver1/geoserver/wms</string>
<string>http://geoserver2/geoserver/wms</string>
</wmsUrl>
> To disable diskquota and metastore seems, from the documentation, to
> disable core functionality of the GWC (the metastore in particular)? Would
> we not end up with a poorly configured / performing cache with these
> options disabled?
>
Will not end up with a poorly configured nor less performant gwc. Both
components are designed to be disabled.
Disabling the disk quota makes no (noticeable) effect on performance. Lost
functionality is... well... no disk quota enforcement.
Disabling the metastore does boost performance, as a database query does
not need to be made for each and every tile request. You loose the ability
to add parameter filters and tile expiration HTTP response headers though.
Cheers,
Gabriel
>
> Best regards,
> Sebjørn Birkeland
>
> SEBJØRN SÆTHER BIRKELAND
> SENIOR CONSULTANT
> +47 982 19 301
>
> [email protected] | www.bekk.no | open.bekk.no
>
> ________________________________________
> Fra: [email protected] [[email protected]] på vegne av
> Andrea Aime [[email protected]]
> Sendt: 14. februar 2012 14:08
> To: Sebjørn Birkeland
> Cc: [email protected]
> Emne: Re: [Geoserver-users] Using GeoServer with shared data directory
>
> On Tue, Feb 14, 2012 at 1:26 PM, Sebjørn Birkeland
> <[email protected]> wrote:
> >
> > Hi,
> >
> > GeoServer 2.1.2 is deployed on Weblogic 10.3.4.0, and configured an
> external data directory as specified in web.xml. The data directory is
> shared between the two servers in the cluster.
> >
> > When starting GeoServer on both servers: one of the servers works fine,
> but the other one failes with an exception: "Invocation of init method
> failed; nested exception is com.sleepycat.je.EnvironmentLockedException:
> (JE 4.1.7) /data/datex/geoserver_data/gwc/diskquota_page_store The
> environment cannot be locked for single writer access. ENV_LOCKED: The
> je.lck file could not be locked. Environment is invalid and must be
> closed." (see details below).
> >
> > Through searching the internet, we understand that this might have
> something to do with the embedded GWC.
> >
> > Is there a way to make GeoServer work with a shared data directory? Is
> it designed to work with a shared data directory at all? Has anyone got
> experience with installing and using GeoServer in a Weblogic server cluster?
>
>
> Yes, it has able to cluster since many years ago, unfortunately GWC
> has a couple of functionalities, enabled by
> default, that do not work in clustered mode: the disk quota module and
> the metastore.
>
> If you don't need GWC the easiest thing to do is to go in WEB-INF/lib
> and just remove all the *gwc* jars, the rest of
> GeoServer will be mostly unaffected (there is only one or two optional
> KML modules that actually need GWC afaik).
>
> Otherwise you can setup the following system variables in the JVM that
> runs GeoServer:
> -DGWC_DISKQUOTA_DISABLED=true
> -DGWC_METASTORE_DISABLED=true
>
> See http://geowebcache.org/docs/current/configuration/diskquotas.html and
> http://geowebcache.org/docs/current/configuration/storage.html#metastore
>
> Cheers
> Andrea
>
> --
> -------------------------------------------------------
> Ing. Andrea Aime
> GeoSolutions S.A.S.
> Tech lead
>
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
>
> phone: +39 0584 962313
> fax: +39 0584 962313
> mob: +39 339 8844549
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
> http://www.youtube.com/user/GeoSolutionsIT
> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>
> -------------------------------------------------------
>
>
> ------------------------------------------------------------------------------
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--
Gabriel Roldan
OpenGeo - http://opengeo.org
Expert service straight from the developers.
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