[MooseFS-Users] BTRFS

[Michael T. <mic...@ho...>]

Hi.
Is anybody using btrfs for moosefs?
I currently have a 2-chunkserver (using jbod, ext4 fs, and goal=2 for all files) setup running that has recently experienced an hd failure in one of the chunkservers.  While replacing the failed hdd was an almost trivial task, there was a long span of time where a big number of chunks only had 1 copy.  While I did not lose sleep over it, I had this concern of potentially losing chunks should there be another hd failure in the other chunkserver while moosefs is still replicating the 1-copy chunks.
So now I'm entertaining the idea of moving from just-a-bunch-of-ext4-disks to one-big-btrfs-raid1-fs as the underlying storage provider -- using Ubuntu 14.04 distro plus the 4.1.x LTS kernel from kernel-ppa.
I'm thinking that with such a setup I would still be up and running with 2 copies for all chunks even if both chunkservers have 1 disk failure each at the same time.  And the setup would survive a failed chunkserver with 1 failed disk in the remaining chunkserver.
I would like to hear your thoughts on this.
Regards.

--- mike t.