That is part of 982. On Tue, Dec 28, 2010 at 12:46 PM, Shu Zhang <szh...@mediosystems.com> wrote: > I see, thank you. So that feature is coming. Any idea if the same will be > true for local_quorum? That is, if a read repair will happen in the > background for all nodes including nodes in other datacenters? > ________________________________________ > From: Jonathan Ellis [jbel...@gmail.com] > Sent: Monday, December 27, 2010 6:59 PM > To: user > Subject: Re: read repair across datacenters? > > https://issues.apache.org/jira/browse/CASSANDRA-982 > > On Mon, Dec 27, 2010 at 5:55 PM, Shu Zhang <szh...@mediosystems.com> wrote: >> Brandon, for a read with quorum CL, a response is returned to the client >> after half (rounded up) the replica nodes responds. Do you mean that those >> half are RR'ed before the response is returned to the client and the other >> half RR'ed asynchronously? Or is it that the other half of replicas are not >> RR'ed? >> >> ________________________________________ >> From: Brandon Williams [dri...@gmail.com] >> Sent: Monday, December 27, 2010 3:00 PM >> To: user@cassandra.apache.org >> Subject: Re: read repair across datacenters? >> >> On Mon, Dec 27, 2010 at 4:44 PM, Narendra Sharma >> <narendra.sha...@gmail.com<mailto:narendra.sha...@gmail.com>> wrote: >> The comment in the cassandra.yaml says: >> "specifies the probability with which read repairs should be invoked on >> non-quorum reads" >> >> Does this mean RR chance is applicable only for non-quorum reads? >> >> Yes, because on quorum or greater the RR is performed before the response is >> returned. >> >> Another question on same topic: >> Will RR use one of the node in the other datacenter as coordinator instead >> of sending the data to each replica (assuming they have old data)? This is >> to reduce the amount of network traffic between datacenters. >> >> https://issues.apache.org/jira/browse/CASSANDRA-1530 >> >> <https://issues.apache.org/jira/browse/CASSANDRA-1530>-Brandon >> > > > > -- > 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
