Table 8.20
----------

(This table is used in Problem 8.10)

The following table gives processor failure data collected from a
distributed system consisting of 5 processors connected by a local
network.  Each record in the table has the following format:

----------------------------------------------------------
Processor id	Failure time	Recovery time	Error type
----------------------------------------------------------

The time unit is second and time 0 is 12am, 10/1/1987.  The measurement
started from 12am, 12/9/1987 (29,548,800) and ended at 12am, 8/15/1988
(51,148,800), covering 250 days. The error type means the type of error
that causes a processor failure.  Possible error types are CPU, I/O
(network or disk problems), software, and unknown.

--------------------------------------------------
Pr. id	Failure time	Recovery time	Error type
--------------------------------------------------

1	29604556	29605120	Software
1	29704893	29706486	I/O
1	29770774	29772334	Software
1	29779466	29779946	I/O
1	29918361	29919001	I/O
1	29938155	29938995	Unknown
1	29968514	29969314	I/O
1	30204850	30206947	I/O
1	30300136	30300482	I/O
1	30315829	30316496	I/O
1	30552159	30555408	Unknown
1	30571134	30571529	I/O
1	31762359	31762897	I/O
1	31830453	31831347	I/O
1	31837833	31838304	I/O
1	31839160	31839628	I/O
1	31951476	31952241	I/O
1	32123531	32124925	I/O
1	32126834	32127160	I/O
1	32177392	32178646	I/O
1	32963455	32964054	Software
1	33014870	33015438	I/O
1	33152933	33153737	Software
1	34616577	34617326	Software
1	34770846	34771459	I/O
1	37813703	37814561	Unknown
1	38007128	38049817	I/O
1	38955976	38956597	Unknown
1	38961843	38962658	Unknown
1	39465650	39467247	I/O
1	39809295	39810575	Unknown
1	40069978	40071607	I/O
1	41000249	41001273	Software
1	41366807	41387784	Software
1	41391480	41392113	Software
1	42272616	42273174	Software
1	42831896	42833058	Software
1	43309767	43313204	Software
1	43348292	43350322	Software
1	43952410	43953022	Software
1	44877091	44877998	Software
1	45841909	45842888	Software
1	46961851	46962724	Software
1	48878979	48880349	Unknown
1	48888392	48890586	Software
2	29570604	29570904	I/O
2	29577262	29577562	I/O
2	29767256	29767556	I/O
2	29782058	29782358	I/O
2	29788920	29789718	I/O
2	29886930	29887230	I/O
2	29909506	29909806	I/O
2	29910884	29911926	I/O
2	29913095	29913465	I/O
2	29914121	29915273	I/O
2	29916032	29916705	I/O
2	29917194	29917844	I/O
2	29918236	29919428	I/O
2	29939825	29940125	Unknown
2	29946828	29947128	Unknown
2	29949602	29950199	I/O
2	29953804	29954104	I/O
2	29957176	29957476	I/O
2	29963079	29963379	I/O
2	29964579	29966271	I/O
2	29967435	29968115	I/O
2	30550260	30550560	Unknown
2	30550946	30553816	Software
2	30660369	30660669	Unknown
2	31774557	31774857	I/O
2	31775859	31776450	I/O
2	31781002	31781783	I/O
2	31832367	31832781	I/O
2	31839101	31841182	I/O
2	32122929	32129036	I/O
2	32176731	32177250	Software
2	32178134	32180594	I/O
2	32183767	32184321	I/O
2	32449592	32450399	Unknown
2	32962291	32962591	Unknown
2	32975370	32975670	I/O
2	32976674	32976974	I/O
2	32983427	32983727	I/O
2	33049654	33050104	I/O
2	33052795	33053095	I/O
2	33057253	33057553	I/O
2	33059795	33060095	I/O
2	33087233	33087533	I/O
2	33089396	33089696	I/O
2	33120965	33121265	Unknown
2	33148035	33148430	I/O
2	34011900	34012200	Unknown
2	34770845	34771810	I/O
2	34774453	34774753	Unknown
2	34775145	34776270	I/O
2	34777013	34777313	I/O
2	34777969	34778269	I/O
2	34780806	34781106	I/O
2	35659389	35662510	Unknown
2	35668585	35668885	I/O
2	35725413	35725713	I/O
2	35726840	35727669	I/O
2	35730910	35731210	I/O
2	35744817	35745117	I/O
2	35753244	35753544	I/O
2	36785044	36785772	Unknown
2	36789532	36789988	Software
2	36796257	36847121	I/O
2	38249305	38249785	Software
2	38251655	38252099	Unknown
2	38744311	38744777	Software
2	38745674	38746341	CPU
2	38955454	38956597	Unknown
2	39805355	39808038	I/O
2	43064089	43065444	Unknown
2	44732995	44733453	Software
2	45221452	45221917	I/O
2	46375146	46375583	Unknown
2	49391794	49392273	Software
2	50068269	50069049	I/O
3	30550976	30554633	Software
3	31760114	31760624	Software
3	32806356	32806844	Software
3	33152933	33153558	Software
3	34370843	34385770	I/O
3	34779280	34779754	Unknown
3	36783938	36786522	I/O
3	36787771	36788262	Software
3	37800626	37811789	I/O
3	37812929	37813548	Software
3	43175442	43175990	Software
3	43326842	43327797	Unknown
3	43330318	43330785	CPU
3	43331708	43332312	CPU
3	43334898	43338477	CPU
3	43338720	43340663	I/O
3	43342983	43345110	CPU
3	43691509	43692018	Software
3	43693033	43693689	Unknown
3	43693580	43694622	I/O
3	43695584	43696455	Unknown
3	43697283	43698493	I/O
3	47651456	47651969	Software
3	49057997	49058626	Software
3	49568366	49568810	Unknown
3	50043031	50043500	Software
3	50697666	50698119	Unknown
3	50930312	50930764	Unknown
4	29939050	29940425	I/O
4	29943202	29948396	I/O
4	30550948	30554287	I/O
4	30762674	30762976	I/O
4	34777878	34778529	I/O
4	37563700	37567137	I/O
4	37811277	37811786	I/O
4	38956002	38963057	I/O
4	39204773	39205074	I/O
4	43175015	43175315	Unknown
4	47239532	47243366	I/O
4	47641698	47642345	I/O
4	48939418	48940072	Unknown
4	49144906	49145430	I/O
4	50662627	50663276	Unknown
4	50668168	50672456	I/O
4	50758111	50758751	I/O
4	50941271	50943381	I/O
5	30545108	30545606	Software
5	30551262	30553813	Unknown
5	31769662	31770215	Software
5	31953896	31954395	Unknown
5	33152335	33153779	Unknown
5	33153616	33156417	Software
5	34774852	34780711	I/O
5	37813181	37813664	Unknown
5	38955806	38962854	Unknown
5	40928410	40934268	Software
5	40936013	40936767	Unknown
5	43189066	43193507	Software
5	43252583	43254201	Unknown
5	43256847	43257890	Unknown
5	43328379	43333113	Software
5	44903066	44903945	Unknown
5	47064423	47069097	I/O
5	49125607	49126676	Software
5	49478273	49478888	Unknown
5	50618397	50623146	Software