On Tue, Jun 5, 2012 at 4:30 PM, Jim Ancona <j...@anconafamily.com> wrote:
> It might be a good idea for the documentation to reflect the tradeoffs > more clearly. Here's a proposed addition to the Secondary Index FAQ at http://wiki.apache.org/cassandra/SecondaryIndexes Q: How does choice of Consistency Level affect cluster availability when using secondary indexes? A: Because secondary indexes are distributed, you must have CL level nodes available for *all* token ranges in the cluster in order to complete a query. For example, with RF = 3, when two out of three consecutive nodes in the ring are unavailable, *all* secondary index queries at CL = QUORUM will fail, however secondary index queries at CL = ONE will succeed. This is true regardless of cluster size. Comments? Jim
