Increasing Number of Concurrent Users in Legacy orchestrator VM
  • 13 Aug 2024
  • 3 Minutes to read
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Increasing Number of Concurrent Users in Legacy orchestrator VM

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Article summary

The following procedure for Legacy orchestrator virtual machine is used to increase the number of concurrent users in Legacy 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 Legacy 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}
  1. Stop the Hot Standby process by entering:
redundancy control stop
  1. Start MySQL by entering:
service start mysql

Standby Site

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


Note: If the app_server is started, move to the next step.

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

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.

Profile NameCPU (vCPUs)Memory (GiB)Disk I/O (IOPS @6KB)*
5K6465K
15K108015K
30K2414430K
60K4025060K

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

  1. Power on the VM.

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

Increasing the User Profiles

To increase the user profiles

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

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

 free -h
  1. Log in to the Legacy orchestrator appliance console port 2200 as the visionems user.

  2. Assign a profile by entering the following command:

a. For Legacy orchestrator 23.04.1 and prior:

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

b. For Legacy orchestrator 23.12:

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


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


CAUTION: Changing the deployment profile will delete the contents of the /data/medn* instance directories. This logic does not apply when the same deployment profile is reapplied. (This means the contents of the /data/medn* instance directories will be preserved when the same deployment profile is reapplied.)

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 Legacy orchestrator on port 2200.
  2. Log in as the visionems user.
  3. Start the Hot Standby process by entering:
redundancy control start


Notes:
It may take up to 10 minutes for the app_server to 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 Legacy orchestrator on port 2200.
  2. Log in as the visionems user.
  3. Start app_server by entering:
service start app_server 


Note: It may take up to 10 minutes for the app_server to start.

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