Average image file sizes and compression rates
Hello, I'm trying to figure out how much storage space we'd need to purchase if we adopted the following backup & collapsing process using ShadowProtect Server edition:
Specifically, I'm trying to come up with a metric/multiplier/percentage that I can use to figure out how much storage would be required to accommodate the initial base image, and what the file sizes we could expect to see with each of the various daily/weekly/monthly synthetic incremental backup files.
Has anybody developed any rules of thumb to size a storage device based on the initial base image size, accounting for compression, collapsing regime, data growth, etc?
For example, consider the following backup regime for a server with a 100GB base image:
- Initial base image (kept indefinitely)
- Hourly incrementals (kept for 7 days)
- Synthetic Daily Incrementals (kept for 14 days)
- Synthetic Weekly Incrementals (kept for 5 weeks)
- Synthetic Monthly Incrementals (kept for 12 months)
How much storage space would I need to purchase to accomplish this?I realize that this is largely dependent on the amount of data that is changed on the server, but I'm hoping that folks can share what they're seeing in their environments so I can come up with some rough guidelines. Even better, would be a handy chart direct from StorageCraft that I could use to estimate storage capacities taking in to account incremental file size (relative to the base image) with and without average compression rates.Thanks in advance,