[comp.databases] Fault Tolerance

dhepner@hpcuhc.HP.COM (Dan Hepner) (08/03/90)

From: endrizzi@sctc.com (Michael Endrizzi )

>And the war starts.....

Oh, I didn't have in mind any war, and I'll certainly accept
that one is free to assert one's own definition of words
like "fault tolerant".

>Fault Tolerance: A list of faults that will be tolerated and the 
>post-fault level of service for each fault. The process of tolerating
>a fault consists of 3 steps: fault detection, isolation, and recovery.

>Fault Tolerant Information Recall:
>
>	1) Tolerates syntatic faults in databases
>	2) Post level of service guarantees data that is
>	   syntatically "closest" to query.
>	3) Fault-Detection: implicit and assumed
>	   Fault-Isolation: ???
>	   Fault-Recovery:  Query always returns with "best" answer 
>		            available.
>
>Can I see your definition of fault-tolerance mr. hepner??
>Then we can talk.
>
>				Dreez

A widely accepted definition of fault tolerance concerns the ability
to continue to provide service in the face of various hardware faults.

Dan Hepner