In your original question, I assumed you were talking about the
partitioning of a single cluster. Now you are talking about
Geographic Disaster Recovery: the replication of data across
multiple (relatively) independent clusters. This is not yet
supported, but it is most definitely on the road-map.
On 10/6/2012 5:08 PM, Adam Nielsen wrote:
The problem you are describing is called split-brain. Ceph has an odd
number of monitors and quorum is required before objects can be served.
The partition with the smaller number of monitors will wait harmlessly
until connectivity is reestablished .
Ah right, that makes sense. Is this set in stone or can it be
configured? I'm just thinking that in this scenario it could be
beneficial to allow read-only access from the partition with the smaller
number of monitors, if there are also clients that can only see those
hosts. (For example, a business with two sites, and the link between
them goes down, so client PCs can only see their site-local servers.)
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