Recovering of non-dumped databases

Ops and Admin
1

Hello all. I’m quite new with MongoDB.
I have upgraded from MongoDB v4.4 to v5.0, but I haven’t dumped my databases before.
Now the server service points to the newer version.
Hoq can I recover my old databases into the new version, without losing the other new databases that I have created in the meantime?

2

RESOLVED!
I was able to make it, in the following way (in Windows 11):

  • Go to the directory “C:\Program Files\MongoDB\Server\5.0\bin”.
  • Run the command "mongod --dbpath “C:\Program Files\MongoDB\Server\4.4\data”.
  • Go to Task Manager / Services. Stop and restart Mongodb service.
  • On Mongo shell (run “mongo.exe”) type “show dbs”. You should see your old databases.
  • Run command “mongodump --db YourDbName” to get the dump.
  • Go back to your original data directory using "mongod --dbpath “C:\Program Files\MongoDB\Server\5.0\data”.
  • Restore the dump in your new data directory with Mongorestore.exe

That’s all. :slight_smile:

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