Re: Coprosessors/Triggers in C*

2013-06-13 Thread Radim Kolar
Dne 13.6.2013 8:19, Michal Michalski napsal(a): It could be doable to do something when they get converted to tombstone, but I don't think it's the use case you're looking for. actually, this would be good enough for me

Re: Coprosessors/Triggers in C*

2013-06-13 Thread Gareth Collins
Edward, Michal, Thanks very much for the answers. I hadn't really thought before about how Cassandra would implement the TTL feature. I had foolishly assumed that it would be like a delete (which I would eventually be able to trigger on to execute another action) but it makes sense how it is reall

Re: Coprosessors/Triggers in C*

2013-06-12 Thread Michal Michalski
I understood it as a "run trigger when column gets deleted due to TTL", so - as you said - it doesn't sound like something that can be done. Gareth, TTL'd columns in Cassandra are not really removed after TTL - they are just ignored from that time (so they're not returned by queries), but they

Re: Coprosessors/Triggers in C*

2013-06-12 Thread Edward Capriolo
I do not understand what feature you suggesting. Columns can already have a ttl. Are you speaking of a ttl column that could delete something beside itself. That does not sound easy because a ttl comment is dorment until read or compacted. On Tuesday, June 11, 2013, Gareth Collins wrote: > Hello

Re: Coprosessors/Triggers in C*

2013-06-11 Thread Gareth Collins
Hello Edward, I am curious - What about triggering on a TTL timeout delete (something I am most interested in doing - perhaps it doesn't make sense?)? Would you say that is something the user should implement themselves? Would you see intravert being able to do something with this at some later po

Re: Coprosessors/Triggers in C*

2013-06-11 Thread Edward Capriolo
This is arguably something you should do yourself. I have been investigating integrating vertx and cassandra together for a while to accomplish this type of work, mainly to move processing close to data and eliminate large batches that can be computed from a single map of data. https://github.com/

Re: Coprosessors/Triggers in C*

2013-06-11 Thread Tanya Malik
Thanks Romain. On Tue, Jun 11, 2013 at 1:44 AM, Romain HARDOUIN wrote: > Not yet but Cassandra 2.0 will provide experimental triggers: > https://issues.apache.org/jira/browse/CASSANDRA-1311 > > > Tanya Malik a écrit sur 11/06/2013 04:12:44 : > > > De : Tanya Malik > > A : user@cassandra.apache

RE: Coprosessors/Triggers in C*

2013-06-11 Thread Romain HARDOUIN
Not yet but Cassandra 2.0 will provide experimental triggers: https://issues.apache.org/jira/browse/CASSANDRA-1311 Tanya Malik a écrit sur 11/06/2013 04:12:44 : > De : Tanya Malik > A : user@cassandra.apache.org, > Date : 11/06/2013 04:13 > Objet : Coprosessors/Triggers in C* > > Hi, > > D