Question
Accenture Singapore
SG
Last activity: 24 Jul 2020 7:01 EDT
Job Sheduler on Multi Node System
I have created a job scheduler to perform one action and my application is hosted on multi node system.
Let's say Node 1 and Node 2 and I would like Job Scheduler to be run on only Node 1.
In the Job Scheduler configuration, I have selected the Runs on as "Any one associated node" (see attached).
Here my question is, in which node my Job Scheduler would run?? Node 1 or Node 2??
Kindly let me know how to restrict a Job Scheduler to be run only on Node 1.
Regards,
Yuvaraj
***Edited by Moderator: Pallavi to move from Pega Academy to Product***
Allianz Technology
DE
Updated: 24 Jul 2020 0:38 EDT
Accenture Singapore
SG
Hi Oleg,
What my understanding is, it would run either Node 1 or Node 2, but not both.
If that is the case, at what basis, job will choose the node(either Node1 or Node 2) during the execution at runtime??
Regards,
Yuvaraj
Allianz Technology
DE
Hi Yuvaraj,
You are right, it will be either Node1 or Node2. But it can be different at any time, like first execution is on Node2, second on Node1, and so on.
I am not sure about exact algorithm how Pega will choose between Node1 or Node2, I believe it will be just whichever node will pick up the task first to process. Some details from Pega manuals are below:
- To run the job scheduler on only one node in a cluster, click Any one associated node.
If you configure the Job Scheduler to run on any node, the Pega Platform application chooses the node on which it processes the task.
Accenture Singapore
SG
Hi Oleg,
Thank you for the update 😊
Hi Yuvaraj,
The job scheduler will execute randomly on Node 1 or Node 2 at every moment of time. From Pega 8 you can't assign job scheduler to a specific node, only to node type. So, if you want the job to be executed in Node 1 only, you need to make this Node of some specific type (let's say Custom 1) and then choose the same node type in Job Scheduler configuration. The node type is assigned at java starting parameters when a node fires up.
Hope it helps.