Increasing Number of Concurrent Users in Skylight orchestrator VM

The following procedure for Skylight orchestrator virtual machine is used to increase the number of concurrent users in Skylight orchestrator to 100 (for VM version 23.04.1 and prior) or 250 (for VM version 23.12).

The following steps are required:

1. Stop the application
2. Increase physical RAM on the virtual machine
3. Increase the User profiles

Stopping the Application

The application must be stopped before changing the user profile configuration.

Stopping the Application for a Hot Standby Configuration

Active Site

1. Open an SSH terminal session to the Skylight orchestrator on port 2200.
2. Log in as the visionems user.
3. Configure the preferred site by entering:

redundancy config preferred {site-a | site-b}

4. Stop the Hot Standby process by entering:

redundancy control stop

5. Start MySQL by entering:

service start mysql

Standby Site

1. Open an SSH terminal session to the Skylight orchestrator on port 2200.
2. Log in as the visionems user.
3. Start MySQL by entering:

service start mysql

4. Start app_server by entering:

service start app_server 

5. Wait approximately 10 minutes until app_server has started successfully, stop app_server by entering:

service stop app_server 

Stopping the Application for a Non-Hot Standby Configuration

1. Open an SSH terminal session to the Skylight orchestrator on port 2200.
2. Log in as the visionems user.
3. Start app_server by entering:

service start app_server 

service stop app_server 

Increasing Physical RAM

These steps will assign RAM to the virtual appliance.

1. Shut down the VM.
2. Add RAM on the VM based on the deployment profiles.

Depending on the number of users, the tables below provide details on the CPU and memory requirements of the profiles.

*For 15K, 30K and 60K profiles, disk I/O must be split over distinct mount points. Average latency must remain under 5ms.

3. Power on the VM.
   

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   Note: If you are running a redundant configuration, these steps must be run on both virtual appliances of the redundant pair.

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Increasing the User Profiles

To increase the user profiles

1. Access SSH to the Skylight orchestrator via port 22.

2. Check the RAM of the Skylight orchestrator by running the following command to ensure that the users have already provided the exact RAM.

 free -h

3. Log in to the Skylight orchestrator appliance console port 2200 as the visionems user.

4. Assign a profile by entering the following command:

a. For Skylight orchestrator 23.04.1 and prior:

deployment edit type single-node profile <profile_name> user-profile user-100

b. For Skylight orchestrator 23.12:

deployment edit type single-node profile <profile_name> user-profile user-250

Starting the Application

The application must be started after changing the user profile.

Starting the Application for a Hot Standby Configuration

Active Site

1. Open an SSH terminal session to the Skylight orchestrator on port 2200.
2. Log in as the visionems user.
3. Start the Hot Standby process by entering:

redundancy control start

When redundancy show status reports that replication status is up, the application can be accessed.

Starting the Application for a Non-Hot Standby Configuration

1. Open an SSH terminal session to the Skylight orchestrator on port 2200.
2. Log in as the visionems user.
3. Start app_server by entering:

service start app_server