High availability refers to the uninterrupted availability of computer system resources. In an Informatica domain, high availability eliminates a single point of failure and provides minimal service interruption in the event of failure. When you configure high availability for a domain, the domain can continue running despite temporary network, hardware, or service failures.
The following high availability components make services highly available in an Informatica domain:
Resilience. An Informatica domain can tolerate temporary connection failures until either the resilience timeout expires or the failure is fixed.
Restart and failover. A process can restart on the same node or on a backup node after the process becomes unavailable.
Recovery. Operations can complete after a service is interrupted. After a service process restarts or fails over, it restores the service state and recovers operations.
When you plan a highly available Informatica environment, configure high availability for both the internal Informatica components and systems that are external to Informatica. Internal components include the domain, application services, application clients, and command line programs. External systems include the network, hardware, database management systems, FTP servers, message queues, and shared storage.
High availability features for the Informatica environment are available based on your license.
Example
As you open a mapping in the
CDI-PC
Designer workspace, the
CDI-PC Repository Service
becomes unavailable and the request fails. The domain contains multiple nodes for failover and the
CDI-PC
Designer is resilient to temporary failures.
The
CDI-PC
Designer tries to establish a connection to the
CDI-PC Repository Service
within the resilience timeout period. The
CDI-PC Repository Service
fails over to another node because it cannot restart on the same node.
The
CDI-PC Repository Service
restarts within the resilience timeout period, and the
CDI-PC
Designer reestablishes the connection.
After the
CDI-PC
Designer reestablishes the connection, the
CDI-PC Repository Service
recovers from the failed operation and fetches the mapping into the
ASK INFAPreview
