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