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MQSeries.net Forum Index » General IBM MQ Support » Single phase and two phase commit in MQ

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jeevan
PostPosted: Tue Aug 15, 2006 10:15 am    Post subject: Single phase and two phase commit in MQ Reply with quote

Grand Master

Joined: 12 Nov 2005
Posts: 1432
What exactly means transaction here? What is single phase commit and two phase commit transaction? Does it mean updating data in two different system like in mq queue manager and database?

What is the XA managed transaction? Can this be achieved within a MQ? I think the XA services is the part of WAS, is that correct?

I would appreciate for clarifying this.

thanks a lot
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vennela
PostPosted: Tue Aug 15, 2006 10:18 am    Post subject: Re: Single phase and two phase commit in MQ Reply with quote

Jedi Knight

Joined: 11 Aug 2002
Posts: 4055
Location: Hyderabad, India
jeevan wrote:
Does it mean updating data in two different system like in mq queue manager and database?

In a 2-phaase commit, there can be more than 2 participants

http://en.wikipedia.org/wiki/Two-phase_commit
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jefflowrey
PostPosted: Tue Aug 15, 2006 10:31 am    Post subject: Reply with quote

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Joined: 16 Oct 2002
Posts: 19981
MQ can act as both a Resource Manager in an XA transaction, and as a Transaction Manager.

In a lot of scenarios it is configured as the Transaction Manager - like for Message Broker global transactions.

In other cases, it is just used as a resource manager - like for WAS transactions. WAS acts as a transaction manager.
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