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Oracle Apps DBA: Keeping E-Business Suite Alive · Module 5 · Backup and recovery

Where the backups live

Lesson 54 of 184 · 2 min

A backup on the same disk as the database protects against ONE failure and NOT THE ONE THAT MATTERS. Off-host, off-site, and encryption. A backup beside the database survives a dropped table and a corrupted block, and it does not survive the loss of the host — which is the disaster the plan exists for. It is the commonest arrangement in the estates you will inherit, because it is what you get by default when nobody decided otherwise. OFF-HOST IS THE FIRST STEP AND IT IS THE ONE THAT CHANGES THE ANSWER. A copy on different hardware survives that host's failure — and once it is off-host, the retrieval time from it becomes part of Lesson 10's number, which is why the two lessons belong together. OFF-SITE IS THE SECOND AND IT IS WHAT SURVIVES THE SITE. Fire, flood, a building nobody can enter. It is easy to treat as…

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In this module: Module 5 · Backup and recovery

  1. 1What you are actually protecting against
  2. 2The restore you have never testedFree preview
  3. 3Recovery objectives, in plain terms
  4. 4Cold backups: when they are still right
  5. 5RMAN, from nothing
  6. 6Full, incremental and the strategy behind them
  7. 7Backing up the application tier
  8. 8Point-in-time recovery
  9. 9Restoring to a different host
  10. 10How long does a restore actually take
  11. 11Where the backups live
  12. 12What breaks: five backup failures
  13. 13Lab briefing · Lose the database and get it back