![]() ![]() OUTPUT is initiated by buffer manager on behalf of both trx.W=1 v=2 3 READ(A,v) READ(B,w) Main memory v:=v+w Buffer B=1 0 A=2 3 WRITE(A,v) WRITE(B,0) OUTPUT(A) OUTPUT(B) A=2 3 B=1 0 Effect of Trx (2) That would be true for database elements that are blocks.ĭisk Block, or DataBase Effect of Trx (1).We will also assume that no block contains more than one database element (cf. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |