I'm not a real engineer, so please forgive me if I misunderstand, but can't you create a separate rule for each data center (choosing first a local copy, and then remote copies), which should ensure that the primary is always local. Each data center would then use a different pool, associated with the appropriate location- sensitive rule.
Does this approach get you the desired locality preference? -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
