Thanks. Why secondary indexes are recommended for only attributes with low cardinality and they are not very useful for high cardinality values?
2011/3/7 Jonathan Ellis <jbel...@gmail.com> > It does, but this is an implementation detail subject to change (e.g., > the bitmap indexes being added do not). > > On Mon, Mar 7, 2011 at 10:55 AM, Alvin UW <alvi...@gmail.com> wrote: > > Thanks. > > > > Does Cassandra store secondary index with an extra CF? > > > > 2011/3/7 Jonathan Ellis <jbel...@gmail.com> > >> > >> Yes, this is guaranteed the same way single-row updates are guaranteed > >> to be atomic (the commitlog). > >> > >> On Mon, Mar 7, 2011 at 10:13 AM, Alvin UW <alvi...@gmail.com> wrote: > >> > Hello, > >> > > >> > I was wondering whether Secondary Index is consistent with its base > >> > table? > >> > How did you guarantee the consistency? > >> > > >> > Thanks > >> > > >> > Alvin > >> > > >> > >> > >> > >> -- > >> Jonathan Ellis > >> Project Chair, Apache Cassandra > >> co-founder of DataStax, the source for professional Cassandra support > >> http://www.datastax.com > > > > > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of DataStax, the source for professional Cassandra support > http://www.datastax.com >
