Fdbbackup continuous internal

Using FoundationDB
1

Reference: foundationdb/design/backup.md at main · apple/foundationdb · GitHub.

Hi, I’m running fdbbackup with option -z (continuous) with snapshot-interval = 1 days, for example, take a snapshot 01:00 daily and store to S3.
At 10:00 AM, I need to restore from the snapshot.

  1. Assume continuous backup is running normally.
    How fdbrestore can restore the latest data change from 01:00 until 10:00 AM? How mutation logs and differential logs work? Because in data format, there is mutation logs only, I wonder how differential logs work.

  2. If something wrong and make continuous backup died at 08:00 AM. I still can restore data to 08:00 AM, right?

It would be nice if we can update the documentations.