MQSeries.net :: View topic

MQSeries.net

Tech Exchange

Education

Certifications

Library

Info Center

SupportPacs

FAQÂ Â

Usergroups

RSS Feed - WebSphere MQ Support

RSS Feed - Message Broker Support

MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » XA showcase

XA showcase

« View previous topic :: View next topic »

Author

Message

sebastianhirt

Posted: Wed Jun 13, 2007 6:56 am Post subject: XA showcase

Yatiri

Joined: 07 Jun 2004
Posts: 620
Location: Germany

Hi all,

I have setup a message flow in MB V6 that does a DB2 (Ressource Manager) insert and some MQ (Transaction Manager) stuff within a global transaction.

Now the setup is all done and I am perfectly convinced that it does what it is supposed to do. My customer however, is asking to see a showcase that proves, that XA transactions are safer than Broker coordinated ones.

IMHO to really show where XA jumps in and where a Broker coordinated transaction would have failed, I would have to kind of destroy the whole transaction between the database and the mq commits. But that is not as easy to do if you are not the flash.

Any ideas on how to setup such a showcase?

Thanks
Sebastian

Michael Dag

Posted: Wed Jun 13, 2007 10:39 am Post subject:

Jedi Knight

Joined: 13 Jun 2002
Posts: 2607
Location: The Netherlands (Amsterdam)

why don't you apply reverse psychology on your customer

let him proof your global transaction using broker is less stable then his idea of XA transactions...

even without using XA it's difficult to come up with a test
(not code interrupts to simulate failures at exactly the right point!)
that proves transactionality is lost...

try hitting control-C or pull the power plug at exactly the right nano second...
_________________
Michael

MQSystems Facebook page

sebastianhirt

Posted: Thu Jun 14, 2007 2:31 am Post subject:

Yatiri

Joined: 07 Jun 2004
Posts: 620
Location: Germany

Michael Dag wrote:

why don't you apply reverse psychology on your customer

let him proof your global transaction using broker is less stable then his idea of XA transactions...

If things were that easy...

Michael Dag wrote:

even without using XA it's difficult to come up with a test
(not code interrupts to simulate failures at exactly the right point!)
that proves transactionality is lost...

try hitting control-C or pull the power plug at exactly the right nano second...

If I was that fast I would go and run Marathons.

But seriously... From my point of view its almost impossible, unless you have the source code of the ressource and make it fail by 'prepared' code. Pulling a plug in a time window of less than a milli second seems to be not a real option...

Display posts from previous:

Page 1 of 1

MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » XA showcase

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Protected by Anti-Spam ACP