I like to optimize my backup strategy of my MongoDB. I have dedicated folders for each database:
storage: dbPath: /mongodb directoryPerDB: true journal: enabled: true wiredTiger: engineConfig: directoryForIndexes: true
Gives folders like this:
$ tree -d /mongodb /mongodb ├── admin │ ├── collection │ └── index ├── config │ ├── collection │ └── index ├── finaldata │ ├── collection │ └── index ├── diagnostic.data ├── temporarydata │ ├── collection │ └── index ├── journal ├── local │ ├── collection │ └── index └── _tmp
temporarydata contains only temporary data, as the name implies. I like to exclude folder
/mongodb/temporarydata from my backup. What happens if this folder is missing from restore, i.e. what happens if this folder is deleted.
Of course, after restore I have to create a fresh and empty
temporarydata database with all collections and indexes.
The Mongo Deployment is a Sharded Cluster. Database
temporarydata is sharded but all collections in this database are not sharded (I like to distribute the data by using a different Primary Shard, that's the reason why this database has sharding enabled)
Note, I don't like to delete single *.wt files as mentioned in https://serverfault.com/q/911606/463025, the entire database folder would be deleted.
Does it work?