Lesson 7 Planning High Availability

 High availability unto itself gives reference to algorithmic mechanisms enabling the continuance of a resource notwithstanding the occurrence of a catastrophic failure.  In forecasting for high availability you need to consider three primary factors.  These would be fault tolerance, performance and bottom line.  For instance if you have a boundless prerequisite for fault tolerance then your expenses rise by X amount while performance will degrade by Y amount.

 The simplest form of disk redundancy is mirroring and usually has little or no bearing on performance.  This is however; permitting that you utilize technology enabling the computer to concurrently write to both disks. Also parity based RAID is most generally used for data storage in high availability regimes.  This is due to its scalability allowing more effectual utilization of disk storage.
An interesting note is that a Failover Cluster is a consortium of servers that execute the same role and perform on the network as a single unit.

Thanks for Stopping By and "SeeYaLL" next week