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20 DR Series Appliance Cleaner Best Practices
Cindy notes that the latest full pass cleaning process required 1,069,260 seconds or 12.38 days (1,069,260
/ 86,400) thus, Cindy’s cleaner has fallen behind of 5.3 days (12.38 – 7 = 5.3) in cleaner debt. Cindy must
increase her cleaning runtimes such that cleaning debt begins to diminish and eventually achieves a full
cleaner pass to complete within 7 days.
How much should Cindy increase her cleaner schedule? If Cindy’s DR appliance free space is critically
low, she must aggressively schedule the cleaner to recover disk space as quickly as possible by running
the cleaner manually such as the GUI’s ‘Run Cleaner Now’ command. In this example, Cindy is not in a
critical free space situation, but will need to increase her cleaner runtime ASAP. Without increasing
cleaner runtime schedules, Cindy’s production DR can quickly consume the remaining amount eventually
entering into a critical state.
Cindy’s cleaner debt is substantial because it is ~75% Dell’s recommended 7-day full cleaner pass (5.3 / 7
= .75). Thus, she decides to initially increase her cleaning time by ~ 75% in hopes to being to reduce the
5.3 days of cleaning debt and to eventually compete a full cleaner pass within a week. A 75% increase of
50 hours is ~ 88 hours (50 * 1.75 = 87.5), so Cindy decides to increase the cleaning schedule up to 90
hours per week, then observe the impacts to cleaner adjustments. Cindy realizes that the 90 hours of
cleaner runtime is just an estimate, so she expects multiple adjustments to calibrate the cleaner schedule
correctly.
To achieve 90 hours of cleaner run time, Cindy makes her adjustments shown below in the table below: