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LinkedIn open sources IndexTank code

Posted: 26 Dec 2011     Print Version  Bookmark and Share

Keywords:open source  search technologies  social network 

‎Following the path of other social-networking sites, Linkedin has announced that the technology behind IndexTank, the search engine firm it acquired in October 2011, has been released as open-source software under the Apache 2.0 License.

"We are looking forward to seeing IndexTank thrive as an open-source project," said Diego Basch, director of engineering, LinkedIn, in a blog post.

LinkedIn hinted its plans while acquiring IndexTank. "IndexTank and LinkedIn know that open source software is crucial in helping people build applications without having to reinvent the wheel. LinkedIn has agreed to maintain the IndexTank service running for the next six months, as well as to open source the key components that would enable cloud providers to offer a service fully compatible with the IndexTank API," LinkedIn stated during the time of acquisition.

IndexTank has three components. IndexEngine: the full text search and indexing system designed to separate relevance signals from document text. Second is an API (application programming interface) that handles authentication, validation, and communication with the IndexEngine; and also allows users of IndexTank to access the service from different technology platforms (Java, Python, .NET, Ruby and PHP clients are already developed) via HTTP. The package also includes Nebulizer—a multi-tenant framework to host and manage an unlimited number of indexes running over a layer of Infrastructure-as-a-Service. "This component will instantiate new virtual instances as needed, move indexes as they need more resources, and try to be reasonably efficient about it."

The code is available at GitHub. LinkedIn has also released a number of other search technologies as open source, including Zoie, Bobo, and Cleo.

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