File:SCO-VS-SS2PL.jpg
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Summary
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| Description |
Read-write conflict: SCO Vs. SS2PL. Duration of transaction T2 is longer with SS2PL than with SCO. SS2PL delays write operation w2[x] of T2 until T1 commits, due to a lock on x by T1 following read operation r1[x]. If t time units are needed for transaction T2 after starting write operation w2[x] in order to reach ready state, than T2 commits t time units after T1 commits. However, SCO does not block w2[x], and T2 can commit immediately after T1 commits. | |||
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| Source |
Yoav Raz (1991): Locking Based Strict Commitment Ordering, or How to improve Concurrency in Locking Based Resource Managers, DEC-TR 844, December 1991. Yoav Raz (1995): The Principle of Commitment Ordering in yoavraz.googlepages.com | |||
| Date |
1991 | |||
| Author |
Yoav Raz | |||
| Permission (Reusing this file) |
https://sites.google.com/site/yoavraz2/home/wikipedia-copyright-permission
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Licensing
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 | The copyright holder of this file, Yoav Raz, allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other uses are permitted. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:24, 5 January 2009 | | 1,124 × 804 (39 KB) | Comps (talk | contribs) | read-write conflict. SCO Vs. SS2PL. Duration of T2 is longer for SS2PL. From: Yoav Raz: "The Principle of Commitment Ordering" |
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