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Explain the difference between a hot backup and a cold backup and the benefits associated with each?
Utkaesha
Cold Backup- We can take the Backup while DB(eg. Oracle) is down.
Hot Backup-We can take the Backup while DB(eg. Oracle) is running.
Cold backup is a physicalbackup. During a cold backupthe databaseis closed and not available to users. All files of the databaseare copied (image copy). The datafiles do not change during the copy so the databaseis in sync upon restore.
Used when:Service level allows for some down time for backup
Hot backup is a physical backup. In a hot backup the database remains open and available to users. All files of the database are copied (image copy). There may be changes to the database as the copy is made and so all log files of changes being made during the backupmust be saved too. Upon a restore, the changes in the log files are reapplied to bring the databasein sync. Used when:A full backupof a databaseis needed
Service level allows no down time for the backup
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