备份WSO2 DAS CEP事件流并在另一个DAS中还原

Question

Is it possible to backup entire CEP event flow at a DAS and restore in a another DAS? If it is how can i do that?

Answer 1

Usually events in the Streams are not persisted out of box. If you need to persist the events you need to configure it in the streams [1]. When you are persisting you need to select a record store, by default it is "EVENT_STORE" which is stored in the H2 database of the pack. H2 database is not recommended for production, where as you need to change the data source to something like mysql database or HBase.

Please refer documentation on setting up MySQL database for more information [2]. If you setup a MySQL database as the source, technically those data could be accessed from another WSO2DAS node.

On the other WSO2DAS supports clustering with multiple nodes. So you can setup a minimum 2 node High Available Cluster with synchronization [3]

[1] https://docs.wso2.com/display/DAS310/Persist+Event+Stream

[2] https://docs.wso2.com/display/DAS310/Setting+up+MySQL

[3] https://docs.wso2.com/display/CLUSTER44x/Minimum+High+Availability+Deployment+for+WSO2+DAS+3.1.0