Is Atlas’s cloud backup data compressed?
Hi @Kevin_An and welcome to MongoDB community forums!!
The backup on MongoDB uses snapshots which are stored on the same regions as your cluster or could also be distributed between the regions automatically.
Please refer to the documentation that mentions Atlas uses the native snapshot capabilities of your cloud provider to support full-copy snapshots and localised snapshot storage.
Atlas supports Cloud Backups on:
Since the backups are managed by the underlying cloud providers, the snapshot management is also taken care by the deployed providers.
In saying so, the data on the MongoDB deployment, on Atlas as well on server are compressed by default using the Wired Tiger which uses block compression with the snappy compression library for all collections and prefix compression for all indexes.
If your questions are still unanswered, could you please help me understand on what specific information you are looking for regarding the snapshots compression.