Hi,

Sorry if this question is kind of stupid but I'm wondering if there's such a
thing as distributed two phase commit versus regular two phase commit.

Scenario 1: one app server, two EJBs, two databases
Scenario 2: two app servers, two EJBs, two dataases

both scenarios need 2pc. for the first scenario i see one transaction
manager and two resource managers. for the second scenario i see two
transaction managers, two resource managers, and one coordinating
transaction manager.  is this a correct view of the situation? i've seen
scenario 2 refer to as distributed 2pc. is there a difference? if a product
says they support distributed transactions/2pc i would assume it can handle
both scenarios, but maybe they only mean scenario 1?

Thanks for the clarification.

Tinou Bao
www.tinou.com

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