Database transaction schedule: Difference between revisions

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Undid revision 1236623893 by 217.197.97.50 to restore original meaning. The schedule is trivially recoverable since no transaction reads from another
Strict: give example
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====Strict====
 
A schedule is '''strict''' if for any two transactions T1, T2, if a write operation of T1 precedes a ''conflicting'' operation of T2 (either read or write), then the commit or abort event of T1 also precedes that conflicting operation of T2. For example, the schedule F3 above is strict.
 
Any strict schedule is cascade-less, but not the converse. Strictness allows efficient recovery of databases from failure.