The documentation claims that snapshots taken by ops manager are delta (differential) between successive snapshots. How do you then restore? I mean if you are able to delete some snapshots according to retention, how do you connect the dots in between to restore to a point in time. what do they mean by base snapshot? is that whole backup? How can a given snapshot become full and ready for restore if any snapshot before it is deleted? I understand one can replay oplog to go forward to a point in time from a give snapshot. This question is if any snapshot before the snapshot where restore begins gets deleted.

From MongoDB docs:

"...The snapshot only stores the differences between successive snapshots. Snapshots use only a fraction of the disk space required for full snapshots."

Any help is much appreciated.

The documentation claims that snapshots taken by ops manager are delta (differential) between successive snapshots.

• How do you then restore?
• I mean if you are able to delete some snapshots according to retention, how do you connect the dots in between to restore to a point in time.
• What do they mean by base snapshot? Is that whole backup?
• How can a given snapshot become full and ready for restore if any snapshot before it is deleted?

I understand one can replay oplog to go forward to a point in time from a given snapshot. This question is if any snapshot before the snapshot where restore begins gets deleted how can you restore?

From MongoDB docs:

"...The snapshot only stores the differences between successive snapshots. Snapshots use only a fraction of the disk space required for full snapshots."

Any help is much appreciated.