April 1999
Intermediate to advanced
584 pages
23h 17m
English
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System failure
A system failure means that the entire system is unavailable. A failure of this kind may be the result of either a site outage (caused by fire or natural disaster) or a total failure of the server.
Tip
It is standard practice to have at least two copies of your backup tapes, with one copy stored at a different location. This way, you not only do not have a single point of failure if the tape containing your archive file breaks, but you also are able to get at your tapes in the event of a disaster. Even storing a single copy of your tapes in a fireproof vault will not work if you cannot cross a police line after an explosion.
In the case of a system failure, you have three options:
Recover the entire database from a cold backup.
Recover the entire database from hot or cold backups and apply as many archive files as you have available.
Recover the entire database from exports using full, cumulative, and incremental exports.
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