I want to migrate my mongodb from 2.0 to 3.0. So I followed the official doc to use mongodump to backup my dbs and use mongorestore to restore the dbs to mongodb 3.0.
But when I use mongorestore, it tells me "don't know what to do with file "db/collection.bson", skipping...".
Nothing to do. How could I migrate my dbs?
Thanks.
EDIT: Here is my steps.
Use mongodump in mongodb 2.0
mongodump
tree dump
db
├── collection-1.bson
├── collection-2.bson
├── collection-3.bson
├── ...
Copy db directory to mongodb 3.0 server.
On the mongodb 3.0 server calls mongorestore db
But I get this error:
mongorestore db
2015-03-10T09:36:26.237+0800 building a list of dbs and collections to restore from db dir
2015-03-10T09:36:26.237+0800 don't know what to do with file "db/collection-1.bson", skipping...
2015-03-10T09:36:26.237+0800 don't know what to do with file "db/collection-2.bson", skipping...
2015-03-10T09:36:26.237+0800 don't know what to do with file "db/collection-3.bson", skipping...
...
2015-03-10T09:36:26.237+0800 done
It seems one must also specify -d in 3.0 like this:
mongorestore -d db db