Authentication in MongoDB provides ‘normal’, which is full read and write, or ‘readonly’ access at a database level. There are two scenarios when authentication comes into play: single server and multi-server. When using a single server, authentication can be enabled but adding --auth to the startup parameters. When using a replicaset, sharded setup or combination, a key file must be provided and the --keyFile parameter used at startup. This enables each node to communicate with other nodes using a nonce scheme based on the keyFile. In this configuration, --auth is implied and the......
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Security in MongoDB is relatively young in terms of features and granularity. Interestingly, they indicate that a typical use case would be to use Mongo on a trusted network “much like how one would use, say, memcached.” MongoDB does NOT run in secure mode by default. As it is, the features that are available are standard, proven and probably sufficient for most use cases. Here’s a quick summary of pros and cons. Pros Nonce-based digest for authentication Security applies across replica set nodes and shard members Cons Few recent replies on security wiki......
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I’ve been refactoring an application recently to move away from a proprietary and inflexible in memory datastore. The drawbacks of the proprietary datastore included the fact that the content was static. The only way to update data involved a build and replication process that took much longer than the stakeholders were willing to wait. The main selling point in favor of the in memory datastore was that it is blazing fast. And I mean blazing fast. My choice for a replacement datastore technology is MongoDB. MongoDB worked great, but the profiling and performance......
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One of my applications runs on a large assortment of hosts split between various data centers. Some of these are redundant pairs and others are in load balanced clusters. They all require a set of identical files which represent static content and other data. rsync was chosen to facilitate replication of data from a source to many targets. What rsync lacked out of the box was a reporting mechanism to verify that the collection of files across target systems was consistent with the source. Existing solutions Before designing my solution, I searched for......
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Several years ago I hosted with webfaction for about a year. I was drawn to them at the time because they allowed SSH access and I could run Java applications on my account. Those were not common features available under shared hosting at the time. I didn’t end up deploying any Java applications and the PHP sites I did deploy routed through webfaction’s nginx to PHP configuration which frequently failed. That meant that many visitors to my site saw nginx errors rather than my web page. When they couldn’t resolve the issue I......
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Welcome to Boise Code Camp, 2012. This year I decided to present on MongoDB. In a previous presentation on MongoDB and some video training I cover installation and configuration and using replica sets. For the code camp this year I explore some of the differences between schema design for a relational database and schema design for MongoDB. You can copy and paste the commands below directly onto the MongoDB command line to follow along. To begin with, it’s important to know how to get help and see what databases and collections are available.......
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MongoDB implements a form of replication they call replica sets. Referring to a repica set instead of just calling it replication is a helpful distinction that becomes more obviously useful when you are introduced to sharding in MongoDB since each shard should be comprised of a set of replicas unique to that shard, but we’ll get to that later. For now, I want to show you how easy it is to setup and use replica sets. The setup and initial ‘recovery’ of data to all replicas in the set is quite simple. In......
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MongoDB is a database. However, unlike conventional relational databases that are based on well defined schema and use SQL as the primary interface to manage the data, MongoDB instead uses document based storage. The storage uses a format known as BSON, which is a modified form of JSON. This makes the stored documents very flexible and lightweight. It also makes it easy to adjust what is contained in any document without any significant impact to the other documents in a collection (a collection in MongoDB is like a table in a relational database).......
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I put this presentation together for a local web developer meetup. The topic was MongoDB. MongoDB is a database, but unlike traditional relational databases which store data in well defined tables (schema), MongoDB stores data in JSON like documents (BSON). This provides a great deal of flexibility. After you get through this presentation, go have a look at my hands on introduction to MongoDB and my walk through of MongoDB backups using Replica Sets. Mongodb View more presentations from dwatrous....
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