Commercial HA Solutions
High-availability products have been maturing rapidly over the last couple of years and are becoming a standard in disaster recovery configurations. These solutions can alleviate the problems that occur when a server and/or application crashes, by having a fail-over server ready for such a circumstance. Commercial HA solutions provide readily available tools to configure systems in the HA fashion, saving you time and implementing a supported environment.
Currently Available HA Products
There are many competitive high-availability software products on the market today; deciding which one to purchase can be tough. The following list of features is a quick take on the types of questions to ask your potential HA vendor:
- Clustering capability
How many servers can be clustered together? If more than two servers, can any server fail over to any other server?
- Load-balancing capability
If two servers are serving the same function in an HA configuration, can the application’s load be easily distributed between them?
- Application-level recovery
What applications have been tested with this configuration? If servers fail over but applications can’t, you really haven’t gained anything.
- Intelligent monitoring
Does a central station monitor and report on HA clusters? Are SNMP traps or any other monitoring via the system management framework supported?
- Centralized management capability
Can multiple nodes of an HA cluster or multiple HA clusters be monitored from a central location? ...
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