kwcto / datda

Import databases between MongoDB and RethinkDB.

datda

Import databases between MongoDB and RethinkDB.

This module helps you easily import MongoDB database into RethinkDB and back. The implementation is very simple. datda merely gets all the collecitons/tables in your database and gets all the documents/rows in that collectiont/table and inserts them into the other database. The beauty of JSON document stores.

Install

To use the CLI:

npm install -g datda

To use in your node app:

npm install datda

API

CLI

datda
  --m2r                        // Set MongoDB as the source database and RethinkDB as the target database. Overwrites `source` and `target`.
  --r2m                        // Set RethinkDB as the source database and MongoDB as the target database. Overwrites `source` and `target`.

  --source [mongodb/rethinkdb] // Specify whether to import from MongoDB to RethinkDB or from RethinkDB to Mongo (Default: `mongo`)
  --target [mongodb/rethinkdb] // Specify whether to import to MongoDB to RethinkDB or from RethinkDB to Mongo (Default: `rethinkdb`)

  --db                         // Name of database (Can be overwritten by `rdb_db` and `mongo_db`)

  --mdb_db name_of_database
  --mdb_host host              // (Default: 27017)
  --mdb_port mongoport         // (Defulat: ‘localhost’)

  --rdb_db_ name_of_database
  --rdb_port port_number       // (Default: 28015)
  --rdb_host host              // (Default: ‘localhost’)

  --rows_per_batch             // Number of documents/rows per insert query (Default: 1000)
  --log                        // Wheter to log out important events and progress (Default: false)

Examples

Importing the hello database from MongoDB into RethinkDB

datda --m2r --db hello

Importing the hello_mongo database from MongoDB into a database called hello_rethinkb in RethinkDB.

datda --m2r --mdb_db hello_mongo --rdb_db hello_rethinkdb

Importing the hello database from a remote RethinkDB instance into a local MongoDB instance.

datda --r2m --mdb_host 123.123.123.123 --db hello

Node.js

var datda = require('datda');

datda({
  source: 'mongodb',
  target: 'rethinkdb',
  mongodb: {
    host: 'localhost',
    port: 8080,
    db: 'db'
  },
  rethinkdb: {
    host: 'localhost',
    port: 28015,
    db: 'db'
  }
})
.then(function (importLog) {
  // Import log object
});

Examples

Importing the hello database from MongoDB into RethinkDB

datda({
  db: 'hello'
})
.then(function() { });

Importing the hello_mongo database from MongoDB into a database called hello_rethinkb in RethinkDB.

datda({
  mongodb: {
    db: 'hello_mongo'
  },
  rethinkdb: {
    db: 'hello_rethinkdb'
  }
})
.then(function() { });

Importing the hello database from a remote RethinkDB instance into a local MongoDB instance.

datda({
  source: 'rethinkdb',
  target: 'mongodb',
  db: 'hello',
  mongodb: {
    host: '123.123.123.123'
  },
  rethinkdb: {
    db: 'hello_rethinkdb'
  }
})
.then(function() { });

FAQs

Will my data get overwritten if the database already exists?

No. datda expects your source database to exist and your target database not to exist. It will created the database automatically.

Will primary indexes get imported as primary indexes?

Yes. datda imports the primary index from and to the database. If the source database is MongoDB, it will import the _id into id, deleting a preexisting id property. If RethinkDB is the source database, it will import whatever the primaryIndex is in that table into the _id property in MongoDB, deleting anything previously in the _id property.

Will secondary indexes get imported?

No. Importing secondary indexes is not supported.