I don't think secondary index is necessary for cassandra core, at least it is not urgent. I think currently, the first urgent improvements of cassandra are: 1. re-clarify the data-model. 2. re-implement the storage and index, especially the current SSTable implement is not good.
In fact, the current storage/index implement is the most poor point. On Tue, Apr 27, 2010 at 12:11 AM, Jonathan Ellis <jbel...@gmail.com> wrote: > I think that once we have built-in indexing (CASSANDRA-749) you can > make a good case for dropping supercolumns (at least, dropping them > from the public API and reserving them for internal use). > > On Mon, Apr 26, 2010 at 11:05 AM, Schubert Zhang <zson...@gmail.com> > wrote: > > I don't think the SuperColumn is so necessary. > > I think this level of logic can be leaved to application. > > > > Do you think so? > > > > If SuperColumn is needed, as > > https://issues.apache.org/jira/browse/CASSANDRA-598, we should build > index > > in SuperColumns level and SubColumns level. > > Thus, the levels of index is too many. > > > > >
