Progress
Database Administration
Guide and Reference
Example 2: Moderate Availability Requirements
The database administrators at site B have determined the following availability requirements. Table 8–2 provides examples.
Given these requirements, the database administrators perform a full offline backup every Saturday night. Because they can lose only one day of transactions, they supplement weekly backups with daily online incremental backups. Because they can only allow time to restore a single incremental, they perform incremental backups with an overlap factor of six. This means that each incremental backup saves changes that were saved in the last six incremental backups. The full backup is tested Saturday night, and after the incremental backups finish they are tested using disk space reserved for that purpose.
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