The following two transactions result in a deadlock. Show through examples how this deadlock can be dealt with or avoided using conservative and basic two-phase locking algorithms. T1 read_lock (Y); read_item (Y); write_lock (X); (waits for X) T'2 read_lock (X); read_item (X); write_lock (Y); (waits for Y)
The following two transactions result in a deadlock. Show through examples how this deadlock can be dealt with or avoided using conservative and basic two-phase locking algorithms. T1 read_lock (Y); read_item (Y); write_lock (X); (waits for X) T'2 read_lock (X); read_item (X); write_lock (Y); (waits for Y)
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:The following two transactions result in a deadlock. Show through examples how
this deadlock can be dealt with or avoided using conservative and basic two-phase
locking algorithms.
T'1
read_lock (Y);
read_item (Y);
write_lock (X);
(waits for X)
T'2
read_lock (X);
read_item (X);
write_lock (Y);
(waits for Y)
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