Merge mongo data distributed on 2 locations

mongo.md

Let us assume, initally mongo is using /data/db1 dbpath and then /data/db2

Start mongo /data/db1

sudo mongod --dbpath=/data/db1

Export data from mongo /data/db1

mongoexport --db test_db --collection collection1 --out tb_collection1_db1.json

Start mongo /data/db2

sudo mongod --dbpath=/data/db2

Import data from mongo /data/db1

mongoimport --db test_db --collection collection1 --file tb_collection1_db1.json

All done!

Start Mongo Shell

mongo

>use test_db
>db.collections.count()