HA-Singleton using HornetQ 2.0

[joydeep.sarkar]

Dear All,

I am trying to implement HA-Singleton using HornetQ. What I have figured out in the User manual is, there are only Chain and Symmetric topologies. I have tried the same using HASingletonDeployer service inside the all-with-hornetq instance. I amd wondering if that is the correct approach to implement HA singleton, as it has to be either 1 or 2 for max-hop. As such, there could be an ambiguity.

Could anyone please tell me how can HA singleton be configured?

TIA,

Joydeep

[timfox]

Why do you want to HASingleton?

[joydeep.sarkar]

The goal of using HA-Singleton is to achieve master/slave topology. 

[timfox]

Thanks, I know what HASingleton is.

I was asking why you wanted to use it with HornetQ. HornetQ provides live/backup HA functionality without requiring HASingleton. You should read the user manual.

[joydeep.sarkar]

Sorry about the confusion Tim. That's not what I intended to mean.

I have gone through the user manual. The live-backup pair suits the requirement most, but it is the problem with the synchronization.

As the manual says,

"The next release of HornetQ will provide functionality for automatically synchronizing a new backup node to a live node without having to temporarily bring down the live node."

That's where my concern is. That means it requires manual intervention to keep it in sync. And if I go for shared journal, where would it be kept? live or backup? And in shared mode the back up server needs to get restarted as well.
Considering these points, I was thinking to use mixed flavor.

Just a thought on the same note, if I do not use HornetQ topology, I can simply leave the connector and acceptor configuration out, so that the network

is not being looked up for discovery of servers. On the other hand, I can use the HASingletonDeployer service of JBoss. As such, I can achieve the master-slave topology.

Please suggest which option would be the best.

Regards,
Joydeep

[timfox]

I'd suggest waiting for 2.2. There are a bunch of HA improvements currently being worked on, as discussed on the dev forum.

[joydeep.sarkar]

Thanks a ton for your input Tim.

Regards,

Joydeep