JGroups - License

JGroups

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Memcached on JGroups
A clustered task distribution system
ReplCache: variable caching in the cloud

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LGPL

JGroups is open source licensed under the Library (or Lesser) GNU Public License 2.1 (LGPL).
A commercial product can use JGroups (as a library) without having to become open source under the LGPL. (This is the big difference to the GPL, where applications using it must be licensed under the GPL as well.) So, if you for example use JGroups to write a product for clustering an application server, you can sell this product without any restrictions (ship it with JGroups included) and you do not have to make your application open source.

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