August 2018
Beginner
594 pages
22h 33m
English
Content preview from Software Architect's Handbook
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Isolation
Changes made by concurrent transactions must be isolated from changes made by any other concurrent transactions. Many DBMSs have different isolation levels that control the degree to which locking occurs on data being accessed. For example, a DBMS may place a lock on a record being updated so that another transaction cannot update that same record at the same time.