If the deferred update recovery technique is used, discuss the state of each transaction and give...
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If the deferred update recovery technique is used, discuss the state of each transaction and give the value of database item, and then give the value of database item, after the recovery has processed. start_transaction (T₁) write_item(T₁, D, 20) commit(T₁) checkpoint start_transaction(T4) write_item(T4, B, 15) commit(T4) start_transaction(T₂) write_item(T2, B, 12) start_transaction (T3) write_item(T3, A, 30) write_item(T2, D, 25)System crash If the deferred update recovery technique is used, discuss the state of each transaction and give the value of database item, and then give the value of database item, after the recovery has processed. start_transaction (T₁) write_item(T₁, D, 20) commit(T₁) checkpoint start_transaction(T4) write_item(T4, B, 15) commit(T4) start_transaction(T₂) write_item(T2, B, 12) start_transaction (T3) write_item(T3, A, 30) write_item(T2, D, 25)System crash
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STEP BY STEP ANSWER Defered recovery All transaction updates are recordedin the local transaction wo... View the full answer
Related Book For
Database System Concepts
ISBN: 9780078022159
7th Edition
Authors: Abraham Silberschatz, Henry F. Korth, S. Sudarshan
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