Targeting a specific node in a multi-node environment
in our project we run Pega PRPC 7.1.9 in a multi-node cloud environment. Now we plan accomplish the following demand:
Let´s say we have Node A,B,C and D.
Currently I´m logged in on Node A calling an (Openshift) API to get a list of all active nodenames. Now I want to run a specific report / activity on Node C.
How can I accomplish this? I know that there is a SystemPulse agent which handles the cache synchronization on all nodes, but don´t know exactly how to leverage this. Which ways of implementing this are possible?
Many thanks in advance.
***Edited by Moderator: Lochan to update platform capability tags***
The System Pulse is important in a multi-node environment since rule changes saved to the database and updated in local caches on one node need to be reflected on all nodes. Each node has various caches (ABA, VTable, ClassMap) that are required to be consistent throughout the cluster. The System Pulse is designed to ensure that these caches maintain consistency.
I understood from your query that you want to run a report in node C.I think system pulse will keep all the nodes on the same platform so no matter you run the report on whatever node result will be same.
well, it´s not necessarily only running a report on Node C. An activity would be more appropriate. The real situation is:
Our business data is saved in an HSQL database, so it´s independent from Pega´s Oracle DB since it´s in-memory. Therefore running a report is not sufficient, instead we want each node to update the HSQL tables via an activity because otherwise the change is only reflected in the node which you are currently logged into.
Posted: 1 year ago
Posted: 25 Sep 2019 8:11 EDT
Anthony Gourtay (Anthony_Gourtay)
Business Application Expert