![]() ![]() ![]() First of all the (C)ompression ratio and the (D)elta are difficult parameters to estimate but it does give you some hints what we at Veeam use inside and a fairly good explanation why these values are chosen. Reportedly for most VMs it is just 1-2%, but active Exchange and SQL canīe up to 10-20% due to transaction logs activity - so 5% seems to be = average amount of VM disk changes between cycles in percent (we useġ0% right now, but will change it to 5% in v5 based on feedback. ![]() R = number of rollbacks (or increments) according to retention policy (14 by default) = average compression/dedupe ratio (depends on too many factors,Ĭompression and dedupe can be very high, but we use 50% - worst case)į = number of full backups in retention policy (1, unless backup mode with periodic fulls is used) Many Veeam SEs had there own excel configuration sheet to quickly spit out some numbers, some more pretty than others.ĭata = sum of processed VMs size by the specific job (actually used, not provisioned) I'll quote it here because it is still the main idea behind RPS. In the beginning there was nothing, just our famous formula to calculate repository spaces. ![]()
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