With TrueSight Infrastructure Management high-availability (HA), you can minimize the downtime of your monitoring infrastructure. HA is a redundancy operation that eliminates a single point of failure by automatically switching to a standby node if the active node fails or is temporarily shut down. The TrueSight Presentation Server communicates to the HA-enabled Infrastructure Management server through a load balancer.
Consider the following requirements before you configure HA for Infrastructure Management.
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Database
| - Application-level HA is supported only with an Oracle database. You cannot configure application-level HA with the embedded SAP SQL Anywhere database. If you are using the embedded SAP SQL Anywhere database, consider the HA cluster mode.
- BMC recommends that you use Oracle RAC.
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TrueSight Operations Management components
| - TrueSight Presentation Server version 10.7 and later.
- Two TrueSight Infrastructure Management servers version 10.7 and later, designated as the primary and secondary Infrastructure Management servers.
- The primary and secondary Infrastructure Management servers must have identical hardware and operating system configuration.
See the hardware and operating system requirements.
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Third-party load balancer | - A third-party load balancer with reverse proxy configuration support.
If using a software-based load balancer, you must install it on a separate server. Tip If you choose to use NGINX as the load balancer, you can use the attached file as a server configuration example. To detect the active and standby nodes, configure the load balancer to check the HTTP response codes for the following URLs: https://<primary hostname>/jsp/ShowError.jsp
https://<secondary hostname>/jsp/ShowError.jsp
HTTP response 200 - active node
HTTP response 503 - standby node
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Network | Ensure that: - Latency between the nodes is consistently not more than 20 ms
- A minimum bandwidth of 20 Mbps is available at all times
Ensure that the following ports are available. 
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Infrastructure Management Server high-availability architecture
Installing-and-configuring-the-Infrastructure-Management-server-for-application-high-availability