Fwd: British Conference on Databases 2013 - Big Data special.

LNCS series: http://www.springer.com/computer/lncs?SGWID=0-164-6-793341-0 -- Dr Andy Twigg Junior Research Fellow, St Johns College, Oxford Room 351, Department of Computer Science http://www.cs.ox.ac.uk/people/andy.twigg/ andy.tw...@cs.ox.ac.uk | +447799647538 -- Dr Andy Twigg Junior Research

Re: subscribe request

i was hoping for a rick roll. On 14 February 2013 16:55, Eric Evans wrote: > This is new. > > On Thu, Feb 14, 2013 at 9:24 AM, Muntasir Raihan Rahman > wrote: >> >> >> -- >> Best Regards >> Muntasir Raihan Rahman >> Email: muntasir.rai...@gmail.com >> Phone: 1-217-979-9307 >> Department of Compu

Re: Counters question - is there a better way to count

How many distinct uid,someid pairs will you have? On Dec 5, 2013 3:44 PM, "Christopher Wirt" wrote: > I want to build a really simple column family which counts the occurrence > of a single event X. > > > > Once we reach Y occurrences of X the counter resets to 0 > > > > The obvious way to do thi

Re: random thoughts for MUCH faster key lookup in cassandra

ill end up with 80% of their data in one CF and 20% > in all the other CF's…isn't pareto's principal a natural tendency and if it > is, maybe the above feature should be considered? > > Later, > Dean > -- Dr Andy Twigg Junior Research Fellow, St Johns College, Oxfo

Re: Is there update-in-place on maps?

Store pointers to counters as map values?

Re: Is there update-in-place on maps?

Counters can be atomically incremented ( http://wiki.apache.org/cassandra/Counters). Pick a UUID for the counter, and use that: c=map.get(k); c.incr() On 6 August 2013 11:01, Jan Algermissen wrote: > > On 06.08.2013, at 11:36, Andy Twigg wrote: > > > Store pointers to counter