[opencms-dev] OpenCMS on multiple app servers

apoorv.durga at wipro.com apoorv.durga at wipro.com
Thu Dec 15 06:16:08 CET 2005

Thanks for the inputs. I thought of it but since Appserver 2 would only be used when app server 1 is down, I think we will be able to minimize this. However, is there any documentation on how to invalidate cache on the other app server? I've  gone thru flex cache docs but haven't got too much of idea.

Any pointers would be appreciated.


> -----Original Message-----
> From: opencms-dev-bounces at opencms.org
> [mailto:opencms-dev-bounces at opencms.org] On Behalf Of Tomáš Adámek
> Sent: Wednesday, December 14, 2005 3:41 PM
> To: The OpenCms mailing list
> Subject: Re: [opencms-dev] OpenCMS on multiple app servers
> Hello,
> there would be problem with internal opencms cache
> implementation - opencms clears the cache when the
> file/folder is published. So thats mean that if You will
> publish some document on app1 server, it will be flushed from
> cache - but app2 server has no mechanism to check if the
> content of file was changed, so it will still show old
> content of file until u will restart application.
> You will have to implement some notice mechanism to clear
> cache on app2 when you make publish action on app1 server.
> This problem was on opencms 5 but i think, that same cache
> mechanism is implemented on opencms 6 too.
> >Our requirement is that if the server running opencms is
> brought down,
> >the content editors will still be able to contribute content
> and users
> >will be able to access the site.
> >For this, we are planning to have opencms deployed on two
> app servers.
> >There will be a single database and the app servers will NOT be
> >clustered. OpenCMS on both the app servers will access the same
> >database. Although this is not a completely fault tolerant
> system but
> >we are hoping to achieve our objective.
> >
> >However, i'm not sure if there are any implications of this approach.
> >For example, if we use App server A to publish content, will those
> >changes be reflected in App server B? I am assuming it will
> be the case
> >because VFS and the database will still be same.
> >
> >we are using opencms 6.0.2 with weblogic.
> >
> >Any inputs will be much appreciated.
> >
> >BR,
> >/a
> >
> >
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