Re: Slow performance because of used-up "Waste" in AtomicBTreeColumns

2015-07-23 Thread Graham Sanderson
Multiple writes to a single partition key are guaranteed to be atomic. Therefore there has to be some protection. First rule of thumb, don’t write at insanely high rates to the same partition key concurrently (you can probably avoid this, but hints as currently implemented suffer because the p

Slow performance because of used-up "Waste" in AtomicBTreeColumns

2015-07-23 Thread Petter. Andreas
Hello everyone, we are experiencing performance issues with Cassandra overloading effects (dropped mutations and node drop-outs) with the following workload: create table test (year bigint, spread bigint, time bigint, batchid bigint, value set, primary key ((year, spread), time, batchid)) inser