New answers tagged zfs
With a bit of trial and error I found that calling apt-get install linux-headers-generic build-essential before any of the other commands resulted in the later call to apt-get install ubuntu-zfs executing without error. That still didn't fix the mountall problem though :(
You can find more settings in /sys/module/zfs/parameters For exmaple: $ cat /sys/module/zfs/parameters/zfs_prefetch_disable 0 $ echo 1 >/sys/module/zfs/parameters/zfs_prefetch_disable
Hardware RAID is much revered by some, but I think it's like dreaming of having an US army tank as your only vehicle. Sure it's safe, but it's huge, has prohibitive maintenance and fuel costs and actually becomes a trap when it lets you down in the middle of nowhere, with no standard repair service being able to help you. Plus hardware RAID has well-known ...
Create a striped mirrored zpool (effectively RAID10). If you're on a budget you can also get away with a raidz (effectively RAID5, but safer due to zfs checksums). ZFS likes lots of RAM so be sure to fill up your server. With four disks you should easily saturate a 1Gbps LAN (sequential reads) and with only two computers on your network your read ...
I am currently using btrfs, having used zfs in the past. zfs is quite memory hungry and isn't "linux-native", so if you're happy with a newer / less proven filesystem I recommend btrfs. If you do go btrfs on Ubuntu LTS I recommend holding out for 14.04 since the recent kernels have a lot of btrfs updates. A more traditional system would involve LVM + md ...
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