Re: Can the authority service be clustered to achieve failure tolerance?

[Markus Schuch]

Hi Karl,

 

what do you mean with seperate ID?

 

If found this JVM Parameter in the start-agents.sh example:

  org.apache.manifoldcf.processid

Is that it?

 

Another question:

You say the authority services webapp is stateless. There is a max connection parameter for authority connections. How will multiple instances treat this parameter? Are the connections limited throughout the cluster or will each instance respect the limit in its own context?

 

Regards,

Markus

 

Gesendet: Dienstag, 05. April 2016 um 13:09 Uhr
Von: "Karl Wright" <daddy...@gmail.com>
An: "user@manifoldcf.apache.org" <user@manifoldcf.apache.org>
Betreff: Re: Can the authority service be clustered to achieve failure tolerance?

I should also make it clear that each authority service web application instance may need a separate ID (just like the agents processes).  It's not technically necessary, because the authority service is read only, but if you run into problems that is where the issue will lie.  You would set the ID though a -D switch given to the application server process.

 

Thanks,

Karl

 

 

On Tue, Apr 5, 2016 at 7:06 AM, Karl Wright <daddy...@gmail.com> wrote:

Hi Markus,

 

I've heard this question asked maybe once before.

 

Basically, we rely on whatever support your application server or environment has for load balancing.  Since the authority service runs as a web application that does not require session state, this should be relatively easy to set up.  Having said that, I've never myself tried to do it.  But if you want to do some experiments, please share the results with the group. :-)

 

Thanks,

Karl

 

 

On Tue, Apr 5, 2016 at 6:31 AM, Markus Schuch <markus_sch...@web.de> wrote:

Hi,
 
is it possible to setup ManifoldCF to be failure tolerant when it comes to authority checks?
(we are on MCF 2.3)

After reading the https://manifoldcf.apache.org/release/trunk/en_US/how-to-build-and-deploy.html page and excercising "Simplified multi-process model using ZooKeeper-based synchronization" example i learned only how to cluster the agents process. I found no information if it is possible to run multiple authority services.

Is there more documentation about manifoldcf and clustering that i missed?

Thanks in advance
Markus