[tor-dev] Metrics tarballs now available as .tar.xz rather than .tar.bz2

Hello all,

we switched the compression format for metrics tarballs. They are now available as .tar.xz (compressed with `xz -9`), with the previous format being .tar.bz2 (compressed with `bzip2 -1`).

The effect is that the total size of metrics tarballs shrinks from 212G to 33G. The savings in disk space and bandwidth were too tempting, even though compression and decompression are going to cost some more CPU and memory.

The data page now contains links to .tar.xz tarballs:

https://metrics.torproject.org/data.html

However, the .tar.bz2 tarballs will still be provided for another two months until July 17, 2014. This includes already existing and newly created tarballs.

All the best, Karsten