Wolf-Dieter Fink [https://community.jboss.org/people/wdfink] created the discussion "Re: mysql-xa-ds.xml and mysql-ds.xml file" To view the discussion, visit: https://community.jboss.org/message/740631#740631 -------------------------------------------------------------- 1) The difference is the datasource type: * local transactions   There is no two-phase-commit protocol to ensure consistency of distributed transactions   If you have only one datasource (mean also no JMS or other JCA involved) you can use this save * XA transactions   Protocol to ensure consistency in distributed systems (search for XATransaction i.e. wikipedia)   If you have more than one database involved you should use this because of consistency 2) You can have more than one datasource definition in one *-ds.xml file if you need 3) I don't understand it exactly, but if you mean the difference of having one (with both definitions) or two ds.xml files the only difference is that you can not (un)deploy it separate. The pools and connections are separate anyway. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/740631#740631] Start a new discussion in Datasource Configuration at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]

vamshi nooka [https://community.jboss.org/people/vnooka] created the discussion "Re: mysql-xa-ds.xml and mysql-ds.xml file" To view the discussion, visit: https://community.jboss.org/message/744388#744388 -------------------------------------------------------------- The above posts clearly explain the diffrence between XA and local TX. For your other question ie merging of two ds files 1)do you want to add two defn's in one ds file yes you can certainly do it as explained in the above post 2) your endpoint is same for both defn's and just want to use one common def'n for all txs Just use the XA datasource it can serve both the purpose with an overhead of negligible increased response time -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/744388#744388] Start a new discussion in Datasource Configuration at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]