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One of the key elements that helps to enable open source software applications to gain broader enterprise usage is the availability of commercial support options. In the case of the open source MongoDB NoSQL database, that commercial support is now coming from project backer 10gen.
Sun has been getting serious about opening up its software for a few years now. OpenSolaris, an open source Unix operating system like Linux and BSD, released in May, is its latest foray into the open source arena. I found OpenSolaris to be a production-ready OS that works equally well on desktops and servers.
The default installation of MongoDB doesn't enable authentication which is essentials for securing contents. The articles describes step by step commands to create a replica-set in MongoDB using multiple ec2 instances having authentication enabled as well as proper security for member server of replica-set.