Only major compactions can clean out obsolete tombstones. On Tue, May 4, 2010 at 9:59 AM, Jonathan Ellis <jbel...@gmail.com> wrote:
> On Mon, May 3, 2010 at 8:45 PM, Kauzki Aranami <kazuki.aran...@gmail.com> > wrote: > > Let me rephrase my question. > > > > How does Cassandra deal with bloom filter's false positives on deleted > records? > > The same way it deals with tombstones that it encounters otherwise > (part of a row slice, or in a memtable). > > All the bloom filter does is keep you from having to check rows that > don't have any data at all for a given key. Tombstones are not the > same as "no data at all," we do need to propagate tombstones during > replication. > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of Riptano, the source for professional Cassandra support > http://riptano.com >
