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Question

 Cloe Walker (CloeW938) IT Solution Service
IT Solution Service
SG
CloeW938 Member since 2018 227 posts
IT Solution Service
Posted: Jul 17, 2020
Last activity: Jul 28, 2020
Posted: 17 Jul 2020 11:42 EDT
Last activity: 28 Jul 2020 22:22 EDT
Closed

Is REST Service classified as WebUser or BackgroundProcessing?

Hi,

Let's say we have 2 WebUser nodes for browser access and 2 BackgroundProcessing nodes for Agents. Now we've just created REST Service in PRPC. Which nodes are supposed to handle REST call from external system, WebUser nodes or BackgroundProcessing nodes? Can we specify that somewhere, or there is no choice.

Thanks,

 

***Edited by Moderator Kayla to update Platform Capability tags****

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Pega Platform 8.4 Data Integration

Posted: 4 years ago
Posted: 17 Jul 2020 22:55 EDT
John Paul Raja Christu Raja (JohnPaulRaja,C) Maantic Inc Consultant
Maantic Inc
US

Hi, BackgroundProcessing node is preferred. When system gets more REST service request, it won’t impact the web user performance.

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Posted: 4 years ago
Updated: 4 years ago
Posted: 18 Jul 2020 1:46 EDT
Updated: 18 Jul 2020 1:53 EDT
Cloe Walker (CloeW938) IT Solution Service
IT Solution Service
SG

WebUser nodes are redirected by load balancer, but BackgroundProcessing is not. If there is no load balancer up front, how do you think it is possible to use BackgroundProcessing nodes for REST Service?

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Posted: 4 years ago
Posted: 17 Jul 2020 23:14 EDT
Praveen Palagani (palas3) Pegasystems Inc. Principal Technical Solutions Engineer
Pegasystems Inc.
IN

Hi Cloe,

Thanks for posting the query.

There is an option for Listeners (Email, File, MQ, or JMS) to run only in the specific (for example Util, background processing) nodes. However, there is no restriction for services (such as, SOAP and REST) to run only in the Specific nodes unless there is a Load balancer to redirect those requests accordingly. 

Use the load balancer to route the REST requests to specific Pega nodes to run only Service REST on selected nodes.

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Posted: 4 years ago
Updated: 4 years ago
Posted: 18 Jul 2020 1:52 EDT
Updated: 18 Jul 2020 1:53 EDT
Cloe Walker (CloeW938) IT Solution Service
IT Solution Service
SG

Ok, so there is no settings or configuration other than load balancer to redirect services to specific nodes. Got it. In that case my another question is:

(1) Which node type would you set for service nodes? WebUser or BackgroundProcessing?

(2) Would you place additional load balancer for service nodes (let's assume service nodes are also multiple)? Or would you share the load balancer for WebUser nodes?

 

Thanks,

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Posted: 4 years ago
Posted: 28 Jul 2020 22:22 EDT
Cloe Walker (CloeW938) IT Solution Service
IT Solution Service
SG

Thanks. Then we need two LBs for WebUser nodes and Service nodes. Or can a single LB handle two groups? Meaning, for browser requests LB redirects to WebUser nodes, but for REST requests LB redirects to Service nodes. Is such thing feasible?

If it is feasible, which is a common design in general? Two LBs or single LB?

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