zram on Debian/Ubuntu for memory overcommitment

In recent Linux releases, it’s available a tiny module called zram, that permits us to create RAM based block devices (named /dev/zramX), which will be kept in memory as compressed data. These ram-based block devices allow very fast I/O, and compression provides a reasonable amounts of memory saving.

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ZFS + GlusterFS on Linux

Time is almost ripe for start using the native ZFS port on Linux (http://zfsonlinux.org/), and to increase the performances, reliability and space usage of our affordable distributed opensource storage solution.

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