IBM BPM, V8.0.1, All platforms > Troubleshooting and support > Recovering from a failure > Recovery troubleshooting tips
Restarting deployment environments
As one step in a recovery process, you may need to restart of you deployment environment.
About restarting deployment environments
The procedure to restart a deployment environment varies depending on the topology. Topologies are based on system configuration patterns, each pattern designed to meet particular business requirements.
IBM BPM supports a set of predetermined deployment environment configuration patterns.
If none of the patterns meet your requirements, you can plan and create your own customized deployment environment.
In any given deployment environment configuration pattern there are a number of servers running as JVM processes. In general there are three types of servers as follows:
- Messaging Servers
Messaging servers are responsible for providing the Service Integration Bus (SIB) messaging infrastructure.
- WebSphere ESB Servers
Servers with profiles capable of only hosting and running mediation modules.
- WebSphere Process Servers
Servers with profiles capable of hosting and running all module types. This profile hosts the Business Process Choreographer component.
- Support Servers
This server is responsible for providing support and monitoring services such as the Common Event Infrastructure CEI.
The deployment patterns differ in how you group and organize all the functional components, so that the pattern can address your business requirements in the most cost effective fashion. For more advanced and highly available environments, the servers would reside in clusters that are distributed across physical resources.
General practice for restarting servers as part of a recovery operation
A general model for starting servers is to start the messaging servers first, then the support servers and lastly the IBM BPM servers. Each application architecture may have specific dependencies between application components that need to be taken into consideration.
Shutdown basically happens inverse to the startup procedure, starting with the application server clusters and ending with shutting down the messaging infrastructure after it has had time to quiesce and process any inflight transactions.
Related tasks:
Choosing your deployment environment pattern: 
Related information:
IBM BPM and WebSphere Enterprise Service Bus deployment patterns: Selecting your deployment pattern