Hello!
If you are worrying about ZFS on Linux stability you should read this perfect manual from Richard Yao.
You can find here bunch of tests and docs about ZFS support in OpenVZ and vice versa :)
- Comparison table of all available storage backends for OpenVZ
- Disk space effectiveness of ZFS usage for OpenVZ
- Why ploop is not an ideal disk layout for OpenVZ
- Installing OpenVZ container in ZFS native volume, english
- Using ZFS with OpenVZ, zvol with ext4, english
- Why we need ZFS for OpenVZ, russian
- Different cases of behaviour zvol with ext4 and OpenVZ, russian
- Ideas about OpenVZ container on ZFS zvol with ext4, russian
- Running KVM virtual machines on top of OpenVZ ploop
- Useful ZFS articles
How you can help?
- Do performance tests!
- Provide feedback about real world experience with ZFS On Linux
- Find bugs in ZFS and reproduce it :)
- Contribute patches to ZFS!