I am going to have to get really involved with Amanda. We bought some Zmanda licenses for our Sun X4540, which has a smallish Ultrium IV tape library hung off it, and have made some feeble attempts to back up the 20 TB of data on the Sun to tape.

It's been a big mess. The Zmanda GUI is nothing special, but it's cheap and gets you started. If you have a kiddie SAN with only a few TB it will probably work out of the box. But Amanda does not scale up. Once you start spanning tapes and trying to track the state of 10+ million files it requires significant amounts of tuning to work, especially with regard to MySQL and getting it fast enough to support Ultrium IV without shoeshining, and you need to know the Amanda shell commands well.

It's still better than dealing with the incompetent bureaucrats at Symantec Netbackup support, our previous backup software, that's $50K down a black hole. With Amanda the the support is only as good as we users can make it. I haven't seen any other good tips online about how to make Amanda scale up. So as I figure it, I'll post some tips here.

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