stack created HBASE-9864:
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Summary: Notifications bus for use by cluster members keeping
up-to-date on changes
Key: HBASE-9864
URL: https://issues.apache.org/jira/browse/HBASE-9864
Project: HBase
Issue Type: Brainstorming
Reporter: stack
In namespaces and acls, zk callbacks are used so all participating servers are
notified when there is a change in acls/namespaces list.
The new visibility tags feature coming in copies the same model of using zk
with listeners for the features' particular notifications.
Three systems each w/ their own implementation of the notifications all using
zk w/ their own feature-specific watchers.
Should probably unify.
Do we have to go via zk? Seems like all want to be notified when an hbase
table is updated. Could we tell servers directly rather than go via zk?
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