Eric, Thanks for the detailed post! Did you need to start your JVMs with numactl in order to take advantage of NUMA? I know the board, OS and JVM must be configured properly, but it's not clear if the JVMs must be started with numactl.
Thanks, David From: Eric Rosenberry [mailto:epros...@gmail.com] Sent: Sunday, October 24, 2010 10:17 PM To: user@cassandra.apache.org Subject: Experiences with Cassandra hardware planning All- Over the past nine months I have been working to tune our hardware configuration to optimally balance CPU/RAM/disk/iops/network per node for our Cassandra workload. Thanks much to those here who have provided helpful advice. I wanted to share back to the community some of the learnings we have come across including the hardware configuration we have been successful with (YMMV). This is still a work in progress naturally. I have written up a detailed blog post about this here: http://www.bitplumber.net/2010/10/a-cassandra-hardware-stack-dell-c1100s-ocz -vertex-2-ssds-with-sandforce-arista-7048s/ Here are the highlights: Dell C1100 "cloud series" servers with 10x 2.5 inch drive bays OCZ Technology Vertex 2 MLC SSD's with the Sandforce 1200 series controllers Arista Networks 7048 1U Top of Rack switches running MLAG with LACP to the hosts Let me know if you have any questions! -Eric
