For SYSTEM 2000 Version: 11.6
Problem Status: ZD -- ZAP DISTRIBUTED
Description of Problem:
ROLLBACK STATUS SHOULD NOT BE ALLOWED ON DATABASE WHILE RETRIEVAL IS IN PROGRESS IN ANOTHER THREAD. RETRIEVAL CAN CAUSE PAGES TO BE READ INTO MEMORY.
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Top of Zap Deck:
* IBM R11.6 BUG 4496 OS * DELAY ROLLBACK WHILE RETRIEVAL IS IN PROGRESS. ROLLBACK CLEARS PAGES * TO DISK FOR DATABASE BEING ROLLED BACK. RETRIEVAL READS PAGES IN. IF * THE ACTIVITIES OCCUR SIMULTANEOUSLY, AND RETRIEVAL READ IN A PAGE * AFTER RECOVERY HAD CLEARED ALL PAGES TO DISK, AND IF THAT PAGE WAS * LATER UPDATED CAUSING IT TO BE EVENTUALLY REWRITTEN TO DISK, IT COULD * OVERWRITE A PAGE THAT ROLLBACK HAD WRITTEN. THE END RESULT IS * POINTER PROBLEMS. NAME S2000 JUDGE VER 04E4 5980,D0E4,4780,C552,47F0,C4F8,5B90,D160 VER 04F4 47F0,C54C VER 0548 47F0,C4F0 VER 0FA0 0000,0000,0000,0000,0000,0000 REP 04E4 5990,D0E4,4780,C552,0700,0700,0700,0700 REP 04F4 0700,0700 REP 0548 47F0,D16C REP 0FA0 5B90,D160,5809,3028,47F0,C54C CHECKSUM C5F63FB8
End of Zap Deck