数据库8课件.ppt

8. Coping With System Failures;Two major issue;LOG;Failure Modes;More About Transactions;The log manager and transaction manager;Correct Executing of Transaction;The Primitive Operation of Transactions;Describe operation;Example 8.2;Undo Logging - Log Records;The Undo-Logging Rules;Example 8.3;Recovery Using Undo Logging;Recovery is very, very SLOW !;Checkpointing;Nonquiescent Checkpointing;Example 8.6;Redo Logging;The Redo-Logging Rule;Example 8.7;Recovery with Redo Logging;Example 8.8;Example 8.8;Checkpointing a Redo Log;Example 8.9;Recovery with a Checkpointed Redo log;Example 8.10;Example 8.10;Undo/Redo Logging;The Undo/Redo Rules;Example 8.11;Recovery With Undo/Redo Logging;Example 8.12;A Problem With Delayed Commitment;Checkpointing an Undo/Redo Log;Example 8.13;Example 8.13