This is the problem.

ALL writes go from the leader to all nodes and the transaction isn't done
until a quorum of machines have confirmed the write.  Unless you have a
quorum in the central facility, then all writes be as slow as several
round-trips to the peripheral installations.  This slows down every

Observers might help because they are not considered to be part of the

On Sun, Jul 26, 2009 at 11:05 AM, Todd Greenwood

> 4. A WAN topology of co-located ZK servers in both the DC and (n) PODs
> would not significantly degrade the performance of the ensemble, provided
> large blobs of traffic were not being sent across the network.

Ted Dunning, CTO

Reply via email to