File Versioning

Chicago On Call Keeps Multiple Versions of Each File

Every time your files change, the new versions of each file will be backed up automatically. But that doesn’t mean we discard previous versions. In fact, the service will keep three previous versions by default, and can be set to keep up to 28.

It’s just a smarter solution for you and the way you work.

But Don’t Multiple Versions = Lots More Storage Memory?

No. These new versions are usually much smaller than the original file – a fraction of the size, in fact. This is because our backup engine compares each new file to the last version stored. It then extracts the changed data to created a "delta" file. This delta is stored on our servers as a separate version of the file. You can later recover the original file or any of the versions while only using a fraction of the storage space.

Maybe We Should Use an Example to Explain:

Imagine you are working on a 100KB document. You then add a few paragraphs. The backup engine is able to extract perhaps 5KB worth of changes and performs a backup. Then the next day you edit it again resulting in another 10KB of changes.

This document will be stored as the original 100KB file, plus 2 versions of 5KB and 10KB each. You have the ability to restore the complete file as it existed at each of those 3 points in time. The backup will, however, only use 100+5+10=115KB of storage space.