vurleads.blogg.se - Mongodb nodejs

Run the following command to switch to the "test" database and display the collections it contains (if any): use test Run this command to display the selected database: db Run this command to list the existing databases: show dbs T14:27:38.828+0800 I CONTROL ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'. T14:27:38.828+0800 I CONTROL ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'. T14:27:38.828+0800 I CONTROL ** Read and write access to data and configuration is unrestricted. T14:27:38.828+0800 I CONTROL ** WARNING: Access control is not enabled for the database. T14:27:38.497+0800 I STORAGE ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine You will see an output like this (you can ignore the warnings):

To launch it, issue the following command: mongo

There is a console client that comes with MongoDB. Nov 08 14:27:38 ubuntuxenial systemd: Started High-performance, schema-free document-oriented database. Loaded: loaded (/lib/systemd/system/rvice enabled vendor preset: enabled)Īctive: active (running) since Wed 14:27:38 MYT 14min ago

rvice - High-performance, schema-free document-oriented database.

You should see an output similar to the following: Since systemctl does not provide output, we need to verify that the service has started properly: sudo systemctl status mongod If it's not running, issue the following command to start the MongoDB daemon: sudo systemctl start mongod The sample output below verifies that MongoDB is running: Step 1 - Verify MongoDB and Node.js are runningīefore we start, let's verify that MongoDB is running on the server: ps -ef | grep mongo We also assume that MongoDB and Node.js have been installed previously. This tutorial assumes that you are running an Ubuntu 16.04 server that has a non-root user account with sudo privileges to administer your server. Great! Let’s now look at how to connect Node.js to MongoDB on Ubuntu 16.04. As it uses the NoSQL concept, data rows are stored in JSON-like documents which allow arbitrary data to be inserted. In contrast to a relational database, MongoDB does not require a deep predefined schema before you can add data since it can be altered at any time. MongoDB provides high flexibility and availability through horizontal scaling and geographic distribution. MongoDB is a document database that is easily scaleable due to its built-in distributed database design.

It can be used to develop intensive and dynamic web applications such as video streaming sites and single-page applications. Node.js is a free, open-source and cross-platform Javascript run-time environment to execute server-side Javascript code.