Download Oracle RMAN 11g : backup and recovery by Robert Freeman PDF

By Robert Freeman

"Protect your databases from undefined, software program, and operator disasters utilizing the specified info during this Oracle Press consultant. Oracle RMAN 11g Backup and restoration explains the way to configure databases, generate actual documents, and perform method restores. paintings from the command line or Oracle firm supervisor, automate the backup approach, practice Oracle Flashback recoveries, and combine cloud computing Read more...

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The LGWR process is responsible for writing the change vectors (cumulatively known as redo) to the online redo logs from the redo log buffer. ” Archived Redo Logs A log switch occurs when Oracle stops writing to one online redo log and begins to write to another. As the result of a log switch, if the database is in ARCHIVELOG mode and the ARCH process is running, a copy of the online redo log will be made. This copy of the online redo log is called an archived redo log. Oracle can actually copy the archived redo log files to up to ten different destinations.

In this tour of the Oracle database backup and recovery architecture, you will encounter the following: ■ Backup and recovery essentials ■ A few Oracle terms to know ■ Oracle database physical architecture ■ Oracle operational internals ■ ARCHIVELOG versus NOARCHIVELOG mode operations ■ Oracle recovery modes ■ Manual backup operations in Oracle ■ Manual recovery operations in Oracle As we proceed, you will learn the importance of understanding how the Oracle product works, so that you can properly apply the techniques that will be documented in this book to bring your wayward database back to life.

The first architectural question is one of high availability, which is loosely coupled with the second question, which is one of backup and recovery. Let’s look at these questions of high availability and backup and recovery in more detail. High Availability High availability (HA) implies an architecture that prevents the users from being aware of partial or total system (database, network, hardware, and so forth) failure. HA solutions can include such elements as mirrored drives, RAID architectures, database clustering, database failover schemes, and, of course, backup and recovery.

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