What is the importance of implementing a fault tolerance system? Are there any limitations?

                The importance of implementing a Fault Tolerance System is about service continuity or maintaining functionality in the event of system failure though operating speed might be affected.Fault Tolerance System is highly needed in most enterprise organization especially for life-critical systems to continue providing service in the event of system fault. You can implement it to a computer hardware, network system, applications etc. For example, hot swapping of a hard drive in a server rack. 

                Yes, there are limitation of a Fault Tolerance System.  Examples are listed below.

1. You can’t tolerate what you don’t expect

2. 100% Operating level is not guaranteed in the event of system failure.

3. Fault Tolerance System is expensive.

Fault tolerance is a computer system’s capacity to continue functioning in the event of hardware or software failure. In essence, the system ‘tolerates’ a fault that would drive other systems to their knees.

1. Fault Tolerance And High Availability Are Not The Same Thing

2. Building A Truly Fault-Tolerant System Is Quite Costly

3. It’s A Lot More Complex Than You’d Expect – Especially On The Software Side

4. Being Fault Tolerant Doesn’t Mean You Won’t Lose Performance

5. Without Fault Tolerance, Everything Else Comes Crashing Down

if you’re running any sort of online platform or service, fault tolerance needs to be an element of your planning – otherwise, you’re bound to fail.

The importance is to allow to continue to operate properly in the event of  failures. Limitation is not 100% perfect.

• A fault tolerance system ensures continuous data availability.
• This is done by eliminating a single point of failure.
• However, this type of system would not be able to protect data in some cases, such as in accidental deletions.