Dear Wiki user, You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.
The "Hbase/MasterRewrite" page has been changed by stack. http://wiki.apache.org/hadoop/Hbase/MasterRewrite?action=diff&rev1=3&rev2=4 -------------------------------------------------- == Notes == To be organized... + + === Schema vs State === + Chatting w/ Berk, Ryan, and J-D: + + Two locations in zk; one for schema and then one for state. For example, could have hierarchy in zk as follows: + + {{{/hbase/tables/name/schema/{family1, family2} + /hbase/tables/name/state/{attributes [read-only, enabled, nocompact, noflush]} + /hbase/regionservers/openregions/{list of regions...} + /hbase/regionserver/to_open/{list of regions....} + /hbase/regionservers/to_close/{list of regions...} + + Open of a region does not change state -- do not compact or rewrite anything -- in case when we go back to zk to report open, its been opened elsewhere. + + Need to come up with state transitions. Eliminate fuzzy state. + + == More Notes == For RS Worst case loading calculation * 200 regionservers
