Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!ll-xn!mit-eddie!uw-beaver!cornell!rochester!PT.CS.CMU.EDU!ZOG.CS.CMU.EDU!tgl From: tgl@ZOG.CS.CMU.EDU (Tom Lane) Newsgroups: comp.sys.hp Subject: Fault tolerance (was Re: HP825 math 15x SLOWER than 825) Message-ID: <1367@PT.CS.CMU.EDU> Date: 9 Apr 88 23:42:11 GMT References: <830004@bgphp1.UUCP> <830012@bgphp1.UUCP> Sender: netnews@PT.CS.CMU.EDU Organization: Carnegie-Mellon University, CS/RI Lines: 17 Summary: There is a relevant discussion in comp.risks. The lesson to be drawn from this little affair is simple: Fault-tolerant systems must report the faults they tolerate, so that said faults can eventually be fixed. There has been discussion of this point recently in comp.risks (see Tim Mann in RISKS 6.53, Jerome Saltzer in 6.54). I won't try to duplicate their very well-written articles; go read 'em yourself. This does make one wonder about Bob Campbell's recent claim of no failures in the first year of Series 800 shipments. Maybe they just *think* there've been no failures... -- tom lane Internet: tgl@zog.cs.cmu.edu UUCP: !zog.cs.cmu.edu!tgl BITNET: tgl%zog.cs.cmu.edu@cmuccvma