Replication and 0.8.3

have any replicas altough my replication factor is 3. Can someone help me with cues on where/how to confirm if I have any replicas? Thanks Sebastien Coutu

Re: How to scale Cassandra?

Hi Priyanka, We're also using Hadoop on a seperate 2x 1TB SATA disks in RAID0 on the RAID card. Regards, SC On Tue, Jul 5, 2011 at 10:39 AM, Priyanka priya...@gmail.com wrote: Thanks a lot Sebastien. Did you use hadoop map reduce or bulk loading techniques for loading data? regards,

Re: Cassandra memory problem

We had an issue like that a short while ago here. This was mainly happening under heavy load and we managed to stabilize it by tweaking the Young/Old space ratio of the JVM and by also tweaking the tenuring thresholds/survivor ratios. What kind of load to you have on your systems? Mostly reads,

Re: Cassandra memory problem

...@gmx.netwrote: Just to make sure: You were seeing that res mem was more than twice of max java heap and that did change after you tweaked GC settings? Note that I am not having a heap / gc problem. The VM itself thinks everything is golden. On Jul 4, 2011, at 3:41 PM, Sebastien Coutu wrote: We

Re: Cassandra memory problem

is not swapping? Thanks, Daniel On Jul 4, 2011, at 6:04 PM, Sebastien Coutu wrote: It was among one of the issues we had. One of our hosts was using OpenJDK and we've switched it to Sun and this part of the issue stabilized. The other issues we had were Heap going through the roof and then OOM

Re: How to scale Cassandra?

Hi Udo, I didn't read the whole thread but can you define the type of workload you're looking at? Do you have jobs that require reading the whole data stored in your database? For example one big column family that needs to be read entirely by a job? Because the amount of time required to read a

listen_address and rpc_address

on all addresses? Thanks, Sebastien Coutu Hopper Inc.

Re: listen_address and rpc_address

Hi Nick, Thanks, it looks a lot like what I'm experiencing. I've voted on the issue. Regards, Sebastien Coutu On Mon, Jun 27, 2011 at 1:31 PM, Nick Bailey n...@datastax.com wrote: I believe you are describing the issure here: https://issues.apache.org/jira/browse/CASSANDRA-1777 Until

Cassandra JVM GC settings

Hi Everyone, I'm seeing Cassandra GC a lot and I would like to tune the Young space and the Tenured space. Anyone would have recommendations on the NewRatio or NewSize/MaxNewSize to use for an environment where Cassandra has several column families and in which we are doing a mixed load of

Re: minor vs major compaction and purging data

How about cleanups? What would be the difference between cleanup and compactions? On Sat, Jun 11, 2011 at 8:14 AM, Jonathan Ellis jbel...@gmail.com wrote: Yes. On Sat, Jun 11, 2011 at 6:08 AM, Jonathan Colby jonathan.co...@gmail.com wrote: I've been reading inconsistent descriptions of

Re: Re: minor vs major compaction and purging data

operations like move or loadbalance. On , Sebastien Coutu sco...@openplaces.org wrote: How about cleanups? What would be the difference between cleanup and compactions? On Sat, Jun 11, 2011 at 8:14 AM, Jonathan Ellis jbel...@gmail.com wrote: Yes. On Sat, Jun 11, 2011 at 6:08 AM