Replication and 0.8.3

ke I don't 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 wrote: > Thanks a lot Sebastien. > Did you use hadoop map reduce or bulk loading techniques for loading data? > > regards, > Priyanka > > > --

Re: How to scale Cassandra?

Hi, Our hardware configuration is very simple: 1 x 8 Core Processor 32 GB of memory 1 x 250GB SATA disk for the OS/Swap plugged in the motherboard 1 x 250GB SATA disk for Cassandra's commit log plugged in the motherboard 1 x RAID card 2 x 1TB SATA disks for Cassandra in RAID-0 plugged on the RAID

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 w

Re: Cassandra memory problem

only wild guessing. > > Also you are saying that on your servers res mem is not > max heap and the > java process 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 w

Re: Cassandra memory problem

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 Cou

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, wri

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 wrote: > I believe you are describing the issure here: > > https://issues.apache.org/jira/browse/CASSANDRA-1777 >

listen_address and rpc_address

simply make RPC listen on all addresses? Thanks, Sebastien Coutu Hopper Inc.

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 reading

Re: Re: minor vs major compaction and purging data

s like move or loadbalance. > > > On , Sebastien Coutu 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. >

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 wrote: > Yes. > > On Sat, Jun 11, 2011 at 6:08 AM, Jonathan Colby > wrote: > > I've been reading inconsistent descriptions of what major and minor > compactions do.