Scale OMI Web Client users

The following section explains how to scale the number of Web Client users. This is applicable only for AVEVA OMI and AVEVA InTouch HMI Managed applications.

Baseline Performance Test Environment

• For a baseline value on the performance tests, each user accessed unique copies of 3 different types of graphics. The graphics represented comprehensive information as shown in a dashboard, which contained a large number of scripts with complex interactions, resulting in high consumption of CPU on the server.

• Hardware configuration: Windows 10 OS, 32 GB RAM, 16 CPU (Logical Processors)

Result

• Web Client is able to scale to 75+ Read Write users on the test system.

• Graphics that consume less CPU on the server, can scale to a larger number of users.

• ReadOnly users can scale to more users as they shared graphics in memory.

Design

• The application was deployed to four client computers that displayed the running ViewApp.

• The hardware configuration for three computers was: 8 core CPU and16 GB RAM. For the last computer, the configuration was: 4 core CPU and 8 GB.

• Each deployed platform node was connected to a load balancer.

• Users accessed the load balancer by means of a reverse proxy.

• Depending on the number of users and type of requests, the load balancer redirects the request to the most appropriate node.

  

OMI Web Client Summary

• The tests confirmed that the environment was able to scale up to 300 users while consuming 28 CPU (Logical Processors).

• By analyzing CPU and memory usage, the environment can be scaled to support 1000 users with five nodes with 16 CPU each.