[rules-users] BRMS in a WAS cluster

Mon Nov 17 03:03:20 EST 2008

Hi Seema,

I am attaching the repository.xml we had used. Yes, it could be possible that JackRabbit would need to be configured for clustering.(I guess we missed that one).  (You will need to change repository.xml in that case as specified).

The main reason we cannot use the BRMS for our current project is that our deadlines do not allow us to wait till the GA of Release 5 (when we can get enterprise support for it) and we cannot use 4.0.7 as it does not have some features important to us(like Security etc).

Release 5 of the BRMS is really good and if you can use it, you should go for it.

Cheers,
Vikrant

From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Seema Manivannan
Sent: Saturday, November 15, 2008 7:36 AM
To: Rules Users List
Subject: Re: [rules-users] BRMS in a WAS cluster

Vikrant,

Thanks for the prompt reply. It would be surely helpful if you can post the samples which worked for you. What are the license and support issues that made you decide against BRMS? My understanding is that we need to enable JackRabbit clustering when we have JackRabbit running in all nodes of the app server cluster. Oracle RAD would handle only clustering at the DB level. Please correct me if I'm wrong.

Thanks,
Seema
On Thu, Nov 13, 2008 at 1:18 PM, Vikrant Yagnick <VikrantY at mastek.com<mailto:VikrantY at mastek.com>> wrote:

Hi Seema,

We had initially tried using the BRMS for rules using WAS 6.1 and Oracle in clustered modes.

While, we are not going for the BRMS right now due to license and support issues, from that experience I can answer some of the questions, below.

From: rules-users-bounces at lists.jboss.org<mailto:rules-users-bounces at lists.jboss.org> [mailto:rules-users-bounces at lists.jboss.org<mailto:rules-users-bounces at lists.jboss.org>] On Behalf Of Seema Manivannan
Sent: Thursday, November 13, 2008 6:15 AM
To: rules-users at lists.jboss.org<mailto:rules-users at lists.jboss.org>
Subject: Re: [rules-users] BRMS in a WAS cluster

hi,

I would appreciate any replies at least confirming that my approach below is right.

Thanks,
Seema

On Sun, Nov 9, 2008 at 11:16 PM, seemamani <seemamani at gmail.com<mailto:seemamani at gmail.com>> wrote:

We use Drools 4.0.7 in our application which is deployed on a WAS 6.1 cluster
and it is working fine. Now we want to deploy the Drools BRMS also in the
WAS cluster. I went through the Drools and Jackrabbit mailing lists and
documentation. Please confirm if my understanding of how this can be
implemented is correct.

1. By default, JackRabbit uses Apache Derby in-memory database which does
not support clustering

That is correct

2. We need to configure a persistence manager in JackRabbit that stores data
in a RDBMS like Oracle

Yes. If you need a sample, I can send it to you. (Though, I am sure there is a lot of material on this on the web).

3. I need to follow the instructions for JackRabbit clustering given here
http://wiki.apache.org/jackrabbit/Clustering

I am not sure, why you need Jack Rabbit clustering. If the tables are stored in the database, then I am assuming RAC should handle clustering at the DB level.  Though, do correct me if I am wrong.

4.  Also, the Drools documentation says that "The BRMS will create the
tables the first time it is started up if it is running against a fresh
(empty) RDBMS - so its important to note that the user credentials supplied
have permissions to create tables (at least initially, on first run, after
that they could be locked down)."
Is it not possible to create the Oracle tables before running the BRMS (we
have permission issues in creating the tables from the application)? I
assume that the DDL for creating the tables is available with the JackRabbit
distribution.

One Q&D way may be to just create the tables in a test database and then make the schema into DDL scripts for use before installation.

5. Is there anything else I'm missing? Will BRMS work fine in the cluster
with the above setup?

My assumption is that the BRMS is just a web-app using the database as it's back-end and hence do not know of any issues it could face.

Thanks,
Seema
--
View this message in context: http://www.nabble.com/BRMS-in-a-WAS-cluster-tp20408825p20408825.html
Sent from the drools - user mailing list archive at Nabble.com.

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Opinions expressed in this e-mail are those of the individual and not that of Mastek Limited, unless specifically indicated to that effect. Mastek Limited does not accept any responsibility or liability for it. This e-mail and attachments (if any) transmitted with it are confidential and/or privileged and solely for the use of the intended person or entity to which it is addressed. Any review, re-transmission, dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. This e-mail and its attachments have been scanned for the presence of computer viruses. It is the responsibility of the recipient to run the virus check on e-mails and attachments before opening them. If you have received this e-mail in error, kindly delete this e-mail from desktop and server.
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