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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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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