Re: Why does Cassandra recommends Oracle JVM instead of OpenJDK?

2016-12-23 Thread Edward Capriolo
On Fri, Dec 23, 2016 at 6:01 AM, Kant Kodali wrote: > Java 9 Module system looks really interesting. I would be very curious to > see how Cassandra would leverage that. > > On Thu, Dec 22, 2016 at 9:09 AM, Kant Kodali wrote: > >> I would agree with Eric

Re: All subsequent CAS requests time out after heavy use of new CAS feature

2016-12-23 Thread Edward Capriolo
Anecdotal CAS works differently than the typical cassandra workload. If you run a stress instance 3 nodes one host, you find that you typically run into CPU issues, but if you are doing a CAS workload you see things timing out and before you hit 100% CPU. It is a strange beast. On Fri, Dec 23,

"DHT cassandra VS DHT GlusterFS

2016-12-23 Thread Thouraya TH
Hello, Please is there a comparision study "DHT cassandra VS DHT GlusterFS" ? Thanks for help.

Re: Motivation for a DHT ring

2016-12-23 Thread jean paul
Hi all, Please, i'd like to discuss again this question: *What is the motivation for choosing a DHT ring in cassandra? Why not use a normal parallel or distributed file system that supports replication?* @Utkarsh Sengar: *Where in the Dynamo paper is such argumentation?* Did you mean these

Re: All subsequent CAS requests time out after heavy use of new CAS feature

2016-12-23 Thread horschi
Update: I replace all quorum reads on that table with serial reads, and now these errors got less. Somehow quorum reads on CAS values cause most of these WTEs. Also I found two tickets on that topic: https://issues.apache.org/jira/browse/CASSANDRA-9328

Re: Why does Cassandra recommends Oracle JVM instead of OpenJDK?

2016-12-23 Thread Kant Kodali
Java 9 Module system looks really interesting. I would be very curious to see how Cassandra would leverage that. On Thu, Dec 22, 2016 at 9:09 AM, Kant Kodali wrote: > I would agree with Eric with his following statement. In fact, I was > trying to say the same thing. > > "I

Re: CQL datatype for long?

2016-12-23 Thread Varun Barala
yes!! On Thu, Dec 8, 2016 at 1:21 PM, Check Peck wrote: > And then from datastax java driver, I can use. Am I right? > > To Read: > row.getLong(); > > To write > boundStatement.setLong() > > > On Wed, Dec 7, 2016 at 6:50 PM, Varun Barala >

Re: Cassandra cluster performance

2016-12-23 Thread kurt Greaves
Branislav, are you doing async writes?