Typical mail server, let's say 20GB of mails, partition size 100GB. I'm transferring to a LUN on shared storage P2000 and designing the whole thing. What it is typical snapshot size in this situation ? Requirement is to have 2,3 days of incremental backup. Considering the fact, that the space is not for free in this world, the snapshot size should be only 20GB or do I have to add another 100GB in case I would do the full backup ?
So the question is if the snapshot size should be (partition_size)+(size of 2,3 days of incremental backups) or only the size of the second part?