The backup will grow by 10 Gbs every day for a week,ĥ0 Gb (initially done on Monday) +10 Gbs each day x 6 days = 110Gb, Let's say that the initial size of backup is 50 Gbs. You need to keep individual daily backups for 13 days - go ahead and set Daily: 13 days. It is best to use the general Rule of thumb - HOW LONG TO KEEP defines NOT the amount of recovery points, but rather HOW long a backup of the needed day will be kept. Some of the Monthly RPs will overlap with Weekly.ĭ-1 - because one of the Weekly recovery points ALWAYS overlaps with a Daily backup. W ☑ - because some month you will have a scenario when there are 5 Mondays (if Weekly backup is set to Monday, which is default), sometimes there are 4. Where M - amount of Monthly rps, W - weekly, D - daily. The formula to calculate the amount of RP: One RP may play the role of both Monthly, Weekly and Daily or any other combination like that (m+w, w+d. with 6m4w7d rules, this backup will be considered obsolete and liable for being overwritten only when the 7th Monthly backup is create. See here - You create the backup for the first time - it will be the first Monthly RP. Important side-note: the amount of recovery points may be different each month. (which is default) And the backup runs once a day every day The backup to the Cloud grows each day in size equal to 1 incremental (10 Gbs for example). Each day an incremental backup is not zero size, because the NEW data is ADDED to the machine each day.įor example, you have created a default backup plan.Each day an incremental backup is not zero size, because the SAME files are CHANGED.There are three basic scenarios to estimate amount of data stored in an archive: Compression level which varies depending on the nature of data.Retention policies: how long backups should be kept.Schedule of the backups: how often backups should run.
You need to take several factors into consideration: Here's the full version of my response to you: Starting with your particular example, if the entire server has about 100 Gb of data, most of which is in text format (xls, doc, pdf and such), I would estimate the one-time backup to be somewhere in between 20 Gb and 60 Gb (let me know if I hit the mark :) ). First you have to consider that the size depends on many factors.
Thanks for the question, it's a good one!īut I have to say that an answer is in no means short.
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