Re: Advice on architecture

2012-03-28 Thread Radim Kolar
I'm also trying to evaluate different strategies for RAID0 as drive for cassandra data storage. If I need 2T space to keep node tables, which drive configuration is better: 1T x 2drives or 500G x 4drives? more drives is always better. Which stripe size is optimal? smaller stripe sizes are

Re: Advice on architecture

2012-03-28 Thread Mateusz Korniak
On Wednesday 28 of March 2012, Igor wrote: > I'm also trying to evaluate different strategies for RAID0 as drive for > cassandra data storage. If I need 2T space to keep node tables, which > drive configuration is better: 1T x 2drives or 500G x 4drives? Having _similar_ family of HDDs 4x smaller

Re: Advice on architecture

2012-03-28 Thread Igor
On 03/28/2012 02:04 PM, Radim Kolar wrote: RAID0 would help me use more efficiently the total disk space available at each node, but tests have shown that under write load it behaves much worse than using separate data dirs, one per disk. there are different strategies how RAID0 splits reads,

Re: Advice on architecture

2012-03-28 Thread Radim Kolar
RAID0 would help me use more efficiently the total disk space available at each node, but tests have shown that under write load it behaves much worse than using separate data dirs, one per disk. there are different strategies how RAID0 splits reads, also changing io scheduler and filesystem

Advice on architecture

2012-03-27 Thread André Cruz
Hello. I'm developing a system that will require me to store large (<=4MB) columns in Cassandra. Right now I'm storing 1 column per row, in a single CF. The machines I have at my disposal are 32GB RAM machines with 10 SATA drives each. I would prefer to have a larger number of smaller nodes, bu