Using SNAplus2 in a High Availability Environment
Using SNAplus2 with MC/ServiceGuard
Some of the reasons that ServiceGuard works well with SNAplus2 in a high availability environment are as follows:
1.ServiceGuard is designed for general software resiliency. This means that ServiceGuard packages can easily be built for SNAplus2 .
2.The automatic recovery capabilities of ServiceGuard complement the
3.SNAplus2 can take advantage of the standard monitoring and management tools provided by ServiceGuard which makes detecting problems and reacting to those problems a much simpler and quicker process.
Creating the HA SNAplus2 Package
In order to configure SNAplus2 for high availability, you must complete several steps.
Step 1. Install and configure your S erviceGuard cluster Step 2. Install and configure other high availability products
Step 3. Identify your critical SNAplus2 connectivity (see the next section for details)
Step 4. Install SNAplus2 on the primary server and all backup servers Step 5. Create and configure your SNAplus2 package
Follow the ServiceGuard product documentation to install and configure disk hardware, volume groups, logical volumes, and file systems for high availability. In addition, ServiceGuard documentation explain s how to set up your LAN for high availability.
Identifying Critical SNAplus2 Connectivity
Before attempting to create your SNAplus2 package, define the paths through your network that provide SNA connectivity for the users of your SNAplus2 software. Provide at least two paths per application that you wish to make highly available. Identify at least two SNAplus2 servers that can provide SNA network connectivity in your ServiceGuard cluster. Consequently, if one server experiences a failure that prevents it from providing SNA network connectivity, another server can take over that role. Follow these steps to help you build your SNAplus2 package:
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