Hey,

 Currently I'm running Cassandra on Ubuntu 10.4 x86_64 in EC2.

 I'm wondering if anyone observed a better performance  / stability on other distros ( CentOS / RHEL / ...) or OS (eg. Solaris intel/SPARC) ?
 Is anyone running prod on VMs, not cloud, but ESXi or Solaris zones ? Is there love or hate :) ?  Any storage best-practices on VM environments ?
 I like xfs ! Any observations on xfs / ext4 / zfs, from Cassandra usage perspective ?

Cheers,
Sorin