Mongodump / Mongorestore example

script_mongodump_mongorestore.sh

##
## Prefer mongodump/mongorestore instead of mongoexport/mongoimport,
## as it will "export" additional metadata, like indexes etc.
##

### Mongodump example

# Required: host, db, collection, out
# Optional: query (limit results)
mongodump --host mongodb1.example.net \
          --db db_name \
          --collection collection_name \
          --query '{ _id: { $gte: ObjectId("537c3ca7cfefc541c4a41a8e") } }' \
          --out /tmp/mongodump-XXX-2014-07-14


### Mongorestore example

mongorestore --host mongodb1.example.net \
             /path/to/mongodump-XXX-2014-07-14


# Optional:
#   Select a "desired slice" of documents from the collection.
#   For this we need to find the "_id" of the starting document in the collection to dump.

total_count = db.collection.count();
desired_slice = 500000

db.collection.find({}, { _id: 1 }).sort({ _id: 1 }).skip(total_count - desired_slice).limit(1)
# => { "_id" : ObjectId("537c3ca7cfefc541c4a41a8e") }