Re: Question on efficient loading from Cassandra

2017-07-30 Thread Igor Rudyak
Hi Nikolai, As for now Ignite-Cassandra module always executes same CQL query on each node while doing loadCache(...). But you assumptions are right and there is a ticket for this: https://issues.apache.org/jira/browse/IGNITE-3962 Igor On Thu, Jul 27, 2017 at 10:28 AM, Nikolai Tikhonov wrot

Re: Question on efficient loading from Cassandra

2017-07-27 Thread Nikolai Tikhonov
Hello, >So, there is a reduction in elapsed time. Correct? I think that it is not correct for any case. If you have significal count of nodes (for example 20 nodes with 4 cores) than in short period of time Ignite will be quering to Cassandra from ~80 threads. I'm not sure that this high load wil

Question on efficient loading from Cassandra

2017-07-26 Thread Roger Fischer (CW)
Hello, what is the best way to efficiently load data from a backing store, like Cassandra. I am looking for a solution that minimizes work in Ignite and Cassandra. As I understand: The simplest way is to call loadCache() with a single select statement. cache.loadCache( null, "select * from a_t