Was wondering if anyone here could weigh in on using BTRFS for CentOS 6 in a "near production" environment?

I've been using ZFS on Linux and am very happy with the results so far, but don't particularly want to put all my eggs in one basket. Our application architecture allows us to have multiple, concurrent filesystems in mirror so I have the option of running a system under production-like environment without risking actual loss of customer data. In any event, we will be triple redundant at the application level, with ZFS on one file store, RAID/LVM/EXT4 on another, and possibly BTRFS on the third.

Of course, I would want to use AT LEAST "release candidate" quality filesystem, but the ability of ZFS and BTRFS to check for errors and fix without downtime hold a tremendous amount of weight. The file stores are big enough that it is a days-long process to bring an offline file store back online. It would seem that BTRFS is slightly more flexible than ZFS, EG the ability to add RAID-levels for improved redundancy after initial creation without taking the system(s) offline.

Anybody using BTRFS for real, sustained-load, 24x7 environment?

-Ben