[opencms-dev] Load balancing

Mon Mar 24 10:54:03 CET 2008

I agree with Andy.

Yves, cache property is in the properties pages of each element, folder,
resource, etc. It has all to do about FlexCache.

You can learn all about flexcache in: 
http://www.opencms.org/en/modules/downloads/dl_doc_flex_7.0.0.html

JORDI MARTÍ 
Email: jmarti at theinit.com
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________________________________________
De: opencms-dev-bounces at opencms.org [mailto:opencms-dev-bounces at opencms.org]
En nombre de Andy Thompson
Enviado el: domingo, 23 de marzo de 2008 0:05
Para: The OpenCms mailing list
Asunto: Re: [opencms-dev] Load balancing

if you can afford a hardware loadbalancer - can afford ocee.

we've been running our site much as jordi described.  personal opinion was
that it took as much time (read cost) to hack around synchronizing jsp
repositories / flushing cache etc... as it would have taken to just buy
ocee.  and i'm not happy with my hacking.

/shrug.  had to do what we did to meet deadlines...

-andy

On Sat, Mar 22, 2008 at 6:20 AM, Yves Glodt <yg at mind.lu> wrote:
On Thursday 20 March 2008, Jordi Martí wrote:
> Alkacon has an OCEE module just for that. But of course, it is not
> open source. ;-))
>
> I've used OpenCMS the way you say, but having to sacrifice /
> implement in other way some functionalities as:
>       - Indexes: indexes are built in filesystem. If one instance indexes
> a file, the other one won't do it, or that's what experience tells
> me. You should manually reindex in both machines through a external
> process. - FlexCache: if publishing happens in one machine, the other
> one will not know that a page has been published, and cache won't be
> invalidated. That's why I generally use a timeout based cache (cache
> property => "timeout=10").
where can this property be set?

thanks for your detailed information!
Yves

>       - Config files: for example, if you import a module in one machine,
> the other file "opencms-modules.xml" in the other machine won't be
> modified. You could rsync both files or mount that directory or
> something like that.
>
> There's no problem with filesystem created JSP and images, because if
> one instance doesn't have it, it creates in on the fly, so there's no
> problem.
>
> I don't remember any more, but I guess there will be. It depends on
> what functionalities you use or want to use.
>
> I would be glad to hear from others what troubles they have and how
> they solve it.
>
>
>
> JORDI MARTÍ
> Email: jmarti AT theinit _dot_ com
> Skype ID: jmarti.theinit
>
>
>
>
>
>
> -----Mensaje original-----
> De: opencms-dev-bounces at opencms.org
> [mailto:opencms-dev-bounces at opencms.org] En nombre de Yves Glodt
> Enviado el: jueves, 20 de marzo de 2008 11:31
> Para: The OpenCms mailing list
> Asunto: [opencms-dev] Load balancing
>
> Hello,
>
> in my setup I have a hardware loadbalancer/failover device, which
> will balance
> requests to two physical servers running opencms.
>
> These 2 servers are 1:1 copies of each other, and they connect both
> to the *same* database (which provides failover through DRBD)
>
> I guess this is not a problem, to have 2 or more opencms-instances
> from different servers connecting to the same database, or is it ???
> :-)
>
> I would like to request come comments about this kind of setup...
> What other
>
> ways are good for providing balancing and failover
>
> Regards,
> Yves
>
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Andrew R. Thompson
Currently in N.Y *not* Consulting 