作者: lena80379 (小豆芽) 看板: Examination
標題: [課業] 資料庫應用/2PL
時間: Fri May 14 12:00:25 2010
1.考試科目:資料庫應用
2.章節名稱or篇名(單元關鍵字):2PL
3.目前參考用書or考古題出處:向宏
4.想問的內容:
T1 T2
read_lock (Y); read_lock (X);
read(Y); read(X);
write_lock (X); write_lock (Y);
unlock (Y); unlock (X);
read(X); read(Y);
X=X+Y; Y=X+Y;
write(X); write(Y);
unlock (X); unlock (Y);
它們有遵守兩階段鎖定協定, 但它們可能會導致死結
http://wcla.csie.chu.edu.tw/course/database/lecture/EMDB5C18.ppt
18-15提到的
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Thursday, May 13, 2010
[課業] 資料庫應用/2PL
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