What I can understand from "behaving like a deleted" column is - They'll be there for at most GCGraceSeconds?
On Mon, Oct 4, 2010 at 3:51 PM, Jonathan Ellis <jbel...@gmail.com> wrote: > Expiring columns are 0.7 only. > > An expired column behaves like a deleted column until it is compacted away. > > On Mon, Oct 4, 2010 at 8:48 AM, Utku Can Topçu <u...@topcu.gen.tr> wrote: > > Hi Jonathan, > > > > Thank you for mentioning about the expiring columns issue. I didn't know > > that it had existed. > > That's really great news. > > First of all, does the current 0.6 branch support it? If not so, is the > > patch available for the 0.6.5 somehow? > > And about the deletion issue, if all the columns in a row expire? When > the > > row will be deleted, will I be seeing the row in my map inputs somehow, > and > > for how long? > > > > Regards, > > Utku > > > > On Mon, Oct 4, 2010 at 3:30 PM, Jonathan Ellis <jbel...@gmail.com> > wrote: > >> > >> A simpler approach might be to insert expiring columns into a 2nd CF > >> with a TTL of one hour. > >> > >> On Mon, Oct 4, 2010 at 5:12 AM, Utku Can Topçu <u...@topcu.gen.tr> > wrote: > >> > Hey All, > >> > > >> > I'm planning to run Map/Reduce on one of the ColumnFamilies. The keys > >> > are > >> > formed in such a fashion that, they are indexed in descending order by > >> > time. > >> > So I'll be analyzing the data for every hour iteratively. > >> > > >> > Since the current Hadoop integration does not support partial > >> > columnfamily > >> > analysis. I feel that, I'll need to dump the data of the last hour and > >> > put > >> > it to the hadoop cluster and do my analysis on the flat text file. > >> > Do you think of any other "better" way of getting the data of a > keyrange > >> > into a hadoop cluster for analysis? > >> > > >> > Regards, > >> > > >> > Utku > >> > > >> > > >> > > >> > >> > >> > >> -- > >> Jonathan Ellis > >> Project Chair, Apache Cassandra > >> co-founder of Riptano, the source for professional Cassandra support > >> http://riptano.com > > > > > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of Riptano, the source for professional Cassandra support > http://riptano.com >
