Failover Clusters, or HA Clusters or High-Availability Clusters, are groups of computers, failover servers, that help ensure your applications are running at all times. Without clustering your operations are in danger. Failover servers ensure that if one computer stops functioning for whatever reason there are failover cluster machines to ensure that your applications continue to function normally or with minimum down time.
Your employees don’t need to know anything about Failover Clustering but it’s nevertheless a vital component of your network. What are your failover servers doing? Do you have adequate failover clustering? Is your network setup configured to run at peak efficiency during heavy traffic hours. These are questions that must be answered and we can provide those answers.
If you don’t know then please call today so we can help ensure your network isn’t a disaster waiting to happen. Our technicians will perform a network evaluation and determine if your failover clustering setup is powerful enough to handle the data going through your network. If it is then that’s great. If it’s not we’ll create a plan to fix the problem, implement the plan, and make sure it’s working properly.
The longer you wait to ensure your failover clustering is properly setup the more you risk catastrophic server failure. Every hour your employees don’t have access to their computers is an hour you’re not doing business. That costs money. Call today and we’ll start finding solutions now.
About Failover Clustering
Most server features and roles can be kept running with little to no downtime.
Not every application can run in a high-availability cluster environment, and we can help with the necessary design decisions needed to maximize application availability.
In order to run in a high-availability cluster environment, an application must satisfy several important technical requirements including; easy start/stop, shared storage, non-volatile shared storage, and data that does not corrupt when it crashes.
The most common size for a failover cluster is a two-node cluster, since that is the minimum required to provide redundancy, but many clusters consist of many more, sometimes dozens of nodes.
If a cluster node with a running database goes down, the database will be restarted on another cluster node so that users can access the database again. In other words, your applications remain available all the time.
Failover clusters usually use all available techniques to make the individual systems and shared infrastructure as reliable as possible.
Failover clustering Reliability includes features like; disk mirroring, redundant network, redundant storage area network, and redundant electrical power. You need to be up and running at all times.
There isn’t a single high-availability cluster systems to handle failures in distributed computing. There are different strategies.
FAIL_FAST wherein the try fails if the first node cannot be reached, ON_FAIL_TRY_ONE_NEXT_AVAILABLE which tries one more host before giving up, and ON_FAIL_TRY_ALL_AVAILABLE: which tries all existing nodes before giving up.