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Posted to commits@cassandra.apache.org by Apache Wiki <wi...@apache.org> on 2011/04/16 17:21:44 UTC

[Cassandra Wiki] Update of "LiveSchemaUpdates" by StepanKoltsov

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The "LiveSchemaUpdates" page has been changed by StepanKoltsov.
http://wiki.apache.org/cassandra/LiveSchemaUpdates?action=diff&rev1=14&rev2=15

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  = Modifying Schema on a Live Cluster =
- This page discusses features available in 0.7 (only available as svn trunk, as of this writing).
+ This page discusses features available in 0.7.
  
  == Under the Hood ==
  A new system table called `definitions` keeps track of two things: keyspace definitions (`SCHEMA_CF`) and keyspace changes (`MIGRATIONS_CF`).  TimeUUIDs are used throughout to match migrations up with schema and vice-versa.