The Five Color Concurrency Control Protocol Non Two Phase Locking in General Da
The Five Color Concurrency Control Protocol Non Two Phase Locking in General Da
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In our eReader you can find the full English version of the book. Read The Five Color Concurrency Control Protocol Non Two Phase Locking in General Da Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Five Color Concurrency Control Protocol Non Two Phase Locking in General Da
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To quickly assess the difficulty of the text, read a short excerpt:
[] The two cases ii) and iii) (above) look similar but cause very different results.
In ii), T- gets a Yellow lock on x and then, while the Yellow lock is held, T- gets a Green lock on x. In this case, T will update x, but T- gets to see x as it existed before T updated it. Hence the serialization order of the transactions should be T- - T . However in case iii), under similar circumstances, if T- gets a Yellow lock, and J } ° after this Yellow lock has been converted to Red, and released, T- g...ets a Green lock on X, then the serialization order should obviously be T- - T-. (The roles of T- and T in the second example has been reversed, to be similar to the first example. ) The arcs of the precedence relation graph (-) are caused by r-w, w-r and w-w conflicts. These conflicts happen when both the transactions have actually processed the conflicting reads and writes. However for ease of modeling we will assume that the arcs are created earlier. We define that an arc T- - T- is created when either Tj The notations such as /a -3 | aC^YJ denotes types of edges.
What to read after The Five Color Concurrency Control Protocol Non Two Phase Locking in General Da?
You can find similar books in the "Read Also" column, or choose other free books by Partha Dasgupta to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
[] The two cases ii) and iii) (above) look similar but cause very different results.
In ii), T- gets a Yellow lock on x and then, while the Yellow lock is held, T- gets a Green lock on x. In this case, T will update x, but T- gets to see x as it existed before T updated it. Hence the serialization order of the transactions should be T- - T . However in case iii), under similar circumstances, if T- gets a Yellow lock, and J } ° after this Yellow lock has been converted to Red, and released, T- g...ets a Green lock on X, then the serialization order should obviously be T- - T-. (The roles of T- and T in the second example has been reversed, to be similar to the first example. ) The arcs of the precedence relation graph (-) are caused by r-w, w-r and w-w conflicts. These conflicts happen when both the transactions have actually processed the conflicting reads and writes. However for ease of modeling we will assume that the arcs are created earlier. We define that an arc T- - T- is created when either Tj The notations such as /a -3 | aC^YJ denotes types of edges.
What to read after The Five Color Concurrency Control Protocol Non Two Phase Locking in General Da?
You can find similar books in the "Read Also" column, or choose other free books by Partha Dasgupta to read onlineMoreLess
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