MongoDB

I was hoping that this book would be a good introduction to NoSQL in general as well as how to use MongoDB specifically.

But for applications that require high performance throughput and a flexible data model, MongoDB could be worth a look.

The book was full of clear and concise examples that I could use to easily play around with MongoDB and get a feel for using it.

Note that in MongoDB, my tickets collection did not need to be created beforehand.

MongoDB is now set up and ready to use.

This makes it easy to get up and running with MongoDB quickly.

Caching. With its potential for high performance, MongoDB works well as a caching tier in an information infrastructure.

If the database does not exist, MongoDB will create it as soon as you add any data to it.

Read Notes from a production MongoDB deployment to see how one company switched from MySQL to MongoDB.

The final sanity check is to see if the JSON document was persisted to MongoDB, which you'll recall is running over at MongoHQ.

For detailed information on MongoDB's implementation of it, see the MongoDB documentation (see Resources for a link).

Operationally, MongoDB can be run in two modes depending on the needs of the application.

Document and Content Management Systems - as a document-oriented (JSON) database, MongoDB's flexible schemas are a good fit for this.

MongoDB can automatically distribute databases, collections or objects in a collection over multiple shards without any downtime.

In MongoDB, data is stored in collections, allowing you to separate documents if required.

I chose MongoDB initially due the "look and feel" of it's site, documentation, and community.

Data in MongoDB is stored as documents, which allow for representation of complex relationships, all within a single data object.

MongoDB's query engine also makes it very simple to apply aggregation and group functions on your data.

Morphia's filter operators closely map to the query operators used in MongoDB queries.

The = operator I used in the above query, for instance, is analogous to the $eq operator in MongoDB.

Included with the MongoDB distribution is a shell application that allows you complete control over your databases.

Because the MongoDB shell uses JavaScript, you can write regular JavaScript constructs when interacting with your database.

MongoDB's bin directory contains a series of utilities for importing and exporting data in a variety of formats.

For MongoDB or Riak - you can manipulate data at GUI-level e. g. , summarization, but it's not a traditional analysis-situation.

In MongoDB, your blog post document would have a scomments attribute that stores the comments for that post.

You can try this example directly in the interactive MongoDB web console shell which also embeds the online tutorial.

Morphia automatically creates this field to record the type of the object in MongoDB.

This will start the MongoDB database server as a foreground process.

The standard MongoDB distribution includes command line utilities for adding and retrieving GridFS files to and from the local file system.

MongoDB also provides a group function for performing actions like you would do in a GROUP BY expression in SQL.

10gen develops and supports MongoDB, the open source, high performance, scalable, document-oriented database.

Journaling adds additional durability to MongoDB through write-ahead redo logs.

MongoDB is a scalable, high-performance next-generation database.

MongoDB uses the GridFS specification to store large files, by dividing the file into smaller chunks among multiple documents.

For this application, I'll store location coordinates in a MongoDB instance hosted by MongoHQ, which is another PaaS provider.

Each one is queried for pertinent data, then an instance of MongoDB's BasicDBObject is created and populated with relevant data.

These systems typically require multi-object transactions, which MongoDB doesn't support.

Search engine is based on mongodb do a very good choice, use it to create reverse index billions of web pages is a breeze!

One example of this is MongoDB's support for dynamic queries that don't require predefined MapReduce functions.

Closing the command prompt window that opens will stop the MongoDB server.

It allows type-safe, idiomatic access to MongoDB documents.

In the end, I'm not sure how big a fan I am of MongoDB itself, but I'm a big fan of this book.

Morphia is a powerful tool for interacting with MongoDB.

Note in Listing 6 that MongoDB created an ID for each document, as signified by the _id key.

I used this quick install to play with as I read through the book.

Because MongoDB uses BSON and not JSON or CSV, it is difficult to preserve data types when importing data from these formats.

However, if you must store related data separately you can do so easily in MongoDB using a separate collection.

Another good example is that you store customer order information in the MongoDB docs.

MongoDB lets you execute dynamic queries and work in a native language like Java, Ruby, or PHP.

For detailed documentation on how auto-sharding works and how to implement it, see the MongoDB documentation.

In the next section, you will learn how to use the MongoDB shell to create databases, collections, documents, and so on.

In order to facilitate this, MongoDB relies on the concepts of sharding and replication, which you will learn about in this section.

Getting started with MongoDB couldn't be easier, especially because it offers downloads for target operating systems.

Some changes also occurred in MongoDB's toolset.

For example, type connect and hit the return key, and you will see the source code used to connect to a MongoDB database.

MongoDB is very good at real-time inserts, updates, and queries.

I hope you've seen, though, that MongoDB's schemaless nature enables a lot of flexibility.

In addition, you'll also learn how you can store large files in MongoDB using GridFS.

MongoDB was first released to the public 16 months ago, on Nov 2nd 2009.

The Release Notes and MongoDB Jira contain more information on what's new in 1. 6.

For additional information on new features in this release, see the MongoDB 1. 8 webinar.

Read Reflections on MongoDB to learn how Collective Idea has made the switch.

This makes is easy for organizations currently using relational databases to migrate.

Online shell allows you to try out MongoDB without installing

MongoDB supports a variety of conditional operators, including

To get other administration information, you can also run the following commands in the MongoDB shell

Data Connectivity - allowing you to connect as a custom data source such as for MongoDB or Riak