On Tue, Jun 26, 2012 at 7:52 AM, Karthik N <karthik....@gmail.com> wrote:
> My Cassandra ring spans two DCs. I use local quorum with replication > factor=3. I do a write in DC1 with local quorum. Data gets written to > multiple nodes in DC1. For the same write to propagate to DC2 only one > copy is sent from the coordinator node in DC1 to a coordinator node in > DC2 for optimizing traffic over the WAN (from what I have read in the > Cassandra documentation) > > Will a Wan hiccup result in a Hinted Handoff (HH) being created in > DC1's coordinator for DC2 to be delivered when the Wan link is up > again? > I have seen hinted handoff messages in the log files when the remote DC is unreachable. But this mechanism is only used for a the time defined in cassandra.yaml file.
