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[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Recovery and Atomicity ,[object Object],[object Object],[object Object]
Recovery and Atomicity (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Recovery Algorithms ,[object Object],[object Object],[object Object],[object Object],[object Object]
Log-Based Recovery ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Deferred Database Modification ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Deferred Database Modification (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Deferred Database Modification (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Immediate Database Modification ,[object Object],[object Object],[object Object],[object Object],[object Object]
Immediate Database Modification ,[object Object],[object Object],[object Object],[object Object],[object Object]
Immediate Database Modification (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Immediate Database Modification Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],x 1
Immediate DB Modification Recovery Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Checkpoints ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Checkpoints (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example of Checkpoints ,[object Object],[object Object],[object Object],T c T f T 1 T 2 T 3 T 4 checkpoint system failure
Recovery With Concurrent Transactions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Recovery With Concurrent Transactions ,[object Object],[object Object],[object Object],[object Object]
Recovery With Concurrent Transactions (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Recovery With Concurrent Transactions (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example of Recovery ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Log Record Buffering ,[object Object],[object Object],[object Object],[object Object]
Log Record Buffering (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Database Buffering ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Buffer Management (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Buffer Management (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Failure with Loss of Nonvolatile Storage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Recovering from Failure of Non-Volatile Storage ,[object Object],[object Object],[object Object],[object Object],[object Object]
Advanced Recovery: Key Features ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advanced Recovery: Logical Undo Logging ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advanced Recovery: Physical Redo ,[object Object],[object Object],[object Object]
Advanced Recovery: Operation Logging ,[object Object],[object Object],[object Object],[object Object],[object Object],<T1, O1, operation-begin> … . <T1, X, 10, K5> <T1, Y, 45, RID7> <T1, O1, operation-end, (delete I9, K5, RID7)> Physical redo of steps in insert
Advanced Recovery: Operation Logging (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advanced Recovery: Txn Rollback ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advanced Recovery: Txn Rollback (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advanced Recovery: Txn Rollback Example ,[object Object],<T1, start> <T1, O1, operation-begin> … . <T1, X, 10, K5> <T1, Y, 45, RID7> <T1, O1, operation-end, (delete I9, K5, RID7)> <T1, O2, operation-begin>  <T1, Z, 45, 70>       T1 Rollback begins here <T1, Z, 45>     redo-only log record during physical undo (of incomplete O2) <T1, Y, .., ..>     Normal redo records for logical undo of O1 … <T1, O1, operation-abort>    What if crash occurred immediately after this? <T1, abort>
Advanced Recovery: Crash Recovery ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advanced Recovery: Crash Recovery (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advanced Recovery: Checkpointing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advanced Recovery: Fuzzy Checkpointing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],…… <checkpoint L> … .. <checkpoint L> … .. Log last_checkpoint
Advanced Rec: Fuzzy Checkpointing (Cont.) ,[object Object],[object Object],[object Object]
ARIES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ARIES Optimizations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ARIES Data Structures ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ARIES Data Structures: Page LSN ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ARIES Data Structures: Log Record ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],LSN  TransID  PrevLSN  RedoInfo  UndoInfo LSN  TransID  UndoNextLSN  RedoInfo 1 2 3 4 4' 3' 2' 1'
ARIES Data Structures: DirtyPage Table ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page PLSN RLSN P1  25  17 P6  16  15 P23  19  18 16 P6 19 P23 DirtyPage Table Buffer Pool P1  16 … P6  12 .. P15  9 .. P23 11 Page LSNs  on disk 25 P1 9 P15
ARIES Data Structures: Checkpoint Log ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ARIES Recovery Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Remote Backup Systems ,[object Object]
Remote Backup Systems (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Remote Backup Systems (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Remote Backup Systems (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Unit07 dbms

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