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MAILINGS REVIEW VIEW DESIGN LAYOUT DESIGN PAGE LAYOUT REFERENCES T 2 12 A E'TE Aa - A A bri (Body) AaBb AaBbCcDc AaBbCdl AaBbCcDc AaBbCcc
MAILINGS REVIEW VIEW DESIGN LAYOUT DESIGN PAGE LAYOUT REFERENCES T 2 12 A E'TE Aa - A A bri (Body) AaBb AaBbCcDc AaBbCdl AaBbCcDc AaBbCcc AaBbcc Heading 1 TI Normal Title 1 No Spac... Heading 2 Subtitle IU - abe x, X A-ay. Font Paragraph Styles Consider the following schedule S, which has five transactions (T1-Ts). Only the read and write operations of objects X, Y and Z are listed. T2 Time T3 T5 1 I R(X) W(Y) 3 W(Y) Commit 4 5 W(Z) 6 R(Z) Commit 7 W(X) Commit 9 Commit 12 13 R(Y) Wix) Commit Show how this schedule behave when executed under the timestamp ordering protocol (TSO) by filling the transactions' timestamp matrix (TS) and the R/W timestamp matrix; RTS(obj) and WTS[obi). Assume TS is a logical sequence number starting from 1 and when a new transaction started, its TS value is incremented by 1 (i.e. TS=TS+1). All RAW timestamps of objects X, Y and Z are initialized to zero. Clearly show under which conditions the execution proceeds and show the final values in both matrices. Ta TS TS 1 MAILINGS REVIEW VIEW DESIGN LAYOUT DESIGN PAGE LAYOUT REFERENCES T 2 12 A E'TE Aa - A A bri (Body) AaBb AaBbCcDc AaBbCdl AaBbCcDc AaBbCcc AaBbcc Heading 1 TI Normal Title 1 No Spac... Heading 2 Subtitle IU - abe x, X A-ay. Font Paragraph Styles Consider the following schedule S, which has five transactions (T1-Ts). Only the read and write operations of objects X, Y and Z are listed. T2 Time T3 T5 1 I R(X) W(Y) 3 W(Y) Commit 4 5 W(Z) 6 R(Z) Commit 7 W(X) Commit 9 Commit 12 13 R(Y) Wix) Commit Show how this schedule behave when executed under the timestamp ordering protocol (TSO) by filling the transactions' timestamp matrix (TS) and the R/W timestamp matrix; RTS(obj) and WTS[obi). Assume TS is a logical sequence number starting from 1 and when a new transaction started, its TS value is incremented by 1 (i.e. TS=TS+1). All RAW timestamps of objects X, Y and Z are initialized to zero. Clearly show under which conditions the execution proceeds and show the final values in both matrices. Ta TS TS 1
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