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Posted to server-user@james.apache.org by Marcello Marangio <m....@tno.it> on 2006/03/07 10:14:05 UTC
Concurrent james instances on the same db repository
Hi All.
I'm trying to understand if the "ordinary" release 2.2.0 of james supports
concurrency on the db mail repository.
I have to set up a high availability environment with 2 james working in
failover on the same repository.
I found a reference to james HA.
Does anybody use it in a production environment? Is it as reliable as james
2.2.0?
Thanks
Marcello
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Re: R: Concurrent james instances on the same db repository
Posted by Stefano Bagnara <ap...@bago.org>.
I found this too:
http://mail-archives.apache.org/mod_mbox/james-server-dev/200410.mbox/%3C1096936593.4902.70.camel@tempest.swamp%3E
Stefano Bagnara wrote:
> Marcello Marangio wrote:
>> Tell me where to find the source code I'll give it a try. Marcello
>
> The project is here:
> http://sourceforge.net/projects/james-ha
>
> You can find the sources in the CVS repository:
>
> cvs -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/james-ha login
>
> cvs -z3 -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/james-ha co -P
> james-ha
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Re: R: Concurrent james instances on the same db repository
Posted by Stefano Bagnara <ap...@bago.org>.
Marcello Marangio wrote:
> Tell me where to find the source code I'll give it a try.
> Marcello
The project is here:
http://sourceforge.net/projects/james-ha
You can find the sources in the CVS repository:
cvs -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/james-ha login
cvs -z3 -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/james-ha co -P
james-ha
Stefano
>> It would be probably a good thing to find out differences
>> between james 2.2.0 and the HA release and try to make the
>> locking mechanism "pluggable" so that James HA could be a
>> simple "plugin" for James.
>>
>> Any volunteer?
>>
>> Stefano
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R: Concurrent james instances on the same db repository
Posted by Marcello Marangio <m....@tno.it>.
Tell me where to find the source code I'll give it a try.
Marcello
> -----Messaggio originale-----
> Da: Stefano Bagnara [mailto:apache@bago.org]
> Inviato: martedì 7 marzo 2006 19.14
> A: James Users List
> Oggetto: Re: Concurrent james instances on the same db repository
>
> Marcello Marangio wrote:
> > Hi All.
> > I'm trying to understand if the "ordinary" release 2.2.0 of james
> > supports concurrency on the db mail repository.
>
> No, locking is handled by the application so the Lock is an
> in JVM object. If you run 2 different james you can lock the
> same message with both james.
>
> > I have to set up a high availability environment with 2
> james working
> > in failover on the same repository.
> > I found a reference to james HA.
>
> James HA has been written to support the concurrency you
> describe. I never used it.
>
> > Does anybody use it in a production environment? Is it as
> reliable as
> > james 2.2.0?
>
> It would be probably a good thing to find out differences
> between james 2.2.0 and the HA release and try to make the
> locking mechanism "pluggable" so that James HA could be a
> simple "plugin" for James.
>
> Any volunteer?
>
> Stefano
>
>
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> For additional commands, e-mail: server-user-help@james.apache.org
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Re: Concurrent james instances on the same db repository
Posted by Stefano Bagnara <ap...@bago.org>.
Marcello Marangio wrote:
> Hi All.
> I'm trying to understand if the "ordinary" release 2.2.0 of james supports
> concurrency on the db mail repository.
No, locking is handled by the application so the Lock is an in JVM
object. If you run 2 different james you can lock the same message with
both james.
> I have to set up a high availability environment with 2 james working in
> failover on the same repository.
> I found a reference to james HA.
James HA has been written to support the concurrency you describe. I
never used it.
> Does anybody use it in a production environment? Is it as reliable as james
> 2.2.0?
It would be probably a good thing to find out differences between james
2.2.0 and the HA release and try to make the locking mechanism
"pluggable" so that James HA could be a simple "plugin" for James.
Any volunteer?
Stefano
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