Hi Kacper You are correct, in all cases the server level clustering configuration is the same, what changes it how we wire the events.
In failover mode, its expected that client will only send messages to one CEP and when it fails it will send to the other. But this is not always possible, if you use JMS topics the message will be delivered to both CEP nodes (Hence here you have to use the full-active-active ) and if you use JMS queue then the message will be delivered to either of the CEP nodes but not for both (Hence here you have to use the active-active). Therefore how we wire the events should depend on how the events are send to the streams, in all 3 cases the ultimate goal is the send the same event to the identical execution plans in both servers and in all 3 cases one of them will become Active and the other will become Passive. Hence the output will be published only from the Execution plan that has become Active. Its not necessary to setup distributed database, but you have to share the database so in that case you can create a mySQL database [1] and point both the CEPs to that. Then you have to start CEP with the -Dsetup command as[2] and this will create the appropriate tables. Hope this clarifies your doubts Let me know if you need further clarifications. Thanks Suho [1]https://docs.wso2.com/display/CLUSTER420/Setting+up+the+Database [2] https://docs.wso2.com/display/CLUSTER420/Configuring+the+Manager+Node#ConfiguringtheManagerNode-StartingtheASserver On Tue, Dec 16, 2014 at 7:45 AM, Srinath Perera <[email protected]> wrote: > Hi Kacper, > > Adding Suho and team, someone will answer. > > --Srinath > > On Mon, Dec 15, 2014 at 3:19 PM, Kacper Pietrasik < > [email protected]> wrote: >> >> Hi, >> >> I work with WSO2 CEP and I have a little problem with HA. I was looking >> for somebody who might help me with this component, and I noticed in your >> website that you have been working with CEP, so I decided write to you a >> message. >> >> In CEP documentation about HA, WSO2 members show how to set HA in one >> server/PC and recommend to set HA in two servers/PC. I want to to that in >> failover mode. My problem is that when I turn on CEP instances it works in >> active-active mode instead of failover. I noticed that sometimes one >> instance is Passive member and second is active. In documentation >> active-active and failover mode are set up in the same way. >> >> My question are. Is there any properties that I can change to have all >> the time failover mode (when I turn on 2 instance of CEP, one become >> Passive, second become active)? Is it necessary to set up distributed >> database when I have 2 CEP on 2 different servers/PC (I noticed that when I >> changed in second CEP database URL and when I don't change it, it works the >> same)? >> If you don't know how to help me, maybe you know someone in WSO2 how can >> help me with this problem? >> >> -- >> Best regards, >> Kacper Pietrasik >> >> > > -- > ============================ > Blog: http://srinathsview.blogspot.com twitter:@srinath_perera > Site: http://people.apache.org/~hemapani/ > Photos: http://www.flickr.com/photos/hemapani/ > Phone: 0772360902 > -- *S. Suhothayan* Technical Lead & Team Lead of WSO2 Complex Event Processor *WSO2 Inc. *http://wso2.com * <http://wso2.com/>* lean . enterprise . middleware *cell: (+94) 779 756 757 | blog: http://suhothayan.blogspot.com/ <http://suhothayan.blogspot.com/>twitter: http://twitter.com/suhothayan <http://twitter.com/suhothayan> | linked-in: http://lk.linkedin.com/in/suhothayan <http://lk.linkedin.com/in/suhothayan>*
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