Be cautious when choosing an open-source backup tool. For example, AMANDA, an open-source backup product, claims to be the most popular open-source data backup and recovery software in the world. But at the same time, there is also an Enterprise version available (for a fee), that is enhanced and supported through Zmanda Inc., with improvements in usability, security and applications support.
At the same time, there are several good examples of open-source software. I can think of two that I see often: Oracle's Lustre and OpenOffice. OpenOffice is a free, open-source office suite that runs on a number of different platforms. Lustre is supported by programmers who work in some of the most compute-intensive environments on earth, and OpenOffice is an offspring of one of the largest computer companies in the world. In both cases, support is provided by the community who uses these products. Keep in mind though, that the same support may not be provided with AMANDA. If it breaks, loses data, or corrupts data, are you willing to fix it yourself, or wait for a small community of software technicians to find and fix the bug?
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