Hi,
Thank you for your response.
Regarding using multiple GWC-instances with separate directories, I was
thinking of using completely separate directories both for the metastore and
the blobstore. This would mean that the two instances will not share any
infomation. This will, of course, result in two tile caches. But I cannot see
any other solution than having duplicated cache if we wish to have redundancy /
no single point of failure. This will be exactly the same as deploying GWC on
two different servers. It seems like this is the only option if we want
multiple GWC-instances.
Pehaps there is little actual experience in using GWC in a Weblogic cluster
environment the same way we are trying to do. The environment architecture is a
decision outside of our control :)
Best regards,
Sebjørn Birkeland
________________________________
Fra: [email protected] [[email protected]] på vegne av Andrea Aime
[[email protected]]
Sendt: 22. februar 2012 16:11
To: Sebjørn Birkeland
Cc: Gabriel Roldan; [email protected]
Emne: Re: [Geoserver-users] Using GeoServer with shared data directory
On Wed, Feb 22, 2012 at 3:58 PM, Sebjørn Birkeland
<[email protected]<mailto:[email protected]>> wrote:
Hi Andrea and Gabriel,
We rely on using parameterFilters for our GWC-layers, so I guess that means
that we cannot disable the metastore-functionality.
Does that mean that our only option is to use a single GWC-instance with
multiple GeoServer-instances? Would not this result in a single point of
failure?
I believe this is your only option at the moment. And yes, it will result in a
single point of failure.
Does anyone use multiple GWC-instances on Weblogic with a shared data
directory? Is it perhaps possible to configure the servers so that each
instance can use a seperate blob store directory?
Separate blob stores... hmmm.. this might work but you'll end up wit two
separate tile caches too,
as far as I remember once the metastore is enabled GWC will check the existance
of the tile
in the meta-store too.
A solution that would require some modifications to GWC would be to have the
metastore become
pluggable and allow for usage of a centralized database, like a shared
Oracle/PostgreSQL.
And then some way for the two GWC to avoid stepping on each other toes so that
they
don't try to write the same tiles in parallel.
Cheers
Andrea
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GeoSolutions S.A.S.
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