Re: worker_instances vs worker_cores

2014-10-20 Thread Anny Chen
Thanks a lot Andrew! Yeah I actually realized that later. I made a silly mistake here. On Mon, Oct 20, 2014 at 6:03 PM, Andrew Ash wrote: > Hi Anny, SPARK_WORKER_INSTANCES is the number of copies of spark workers > running on a single box. If you change the number you change how the > hardware

Re: worker_instances vs worker_cores

2014-10-20 Thread Andrew Ash
Hi Anny, SPARK_WORKER_INSTANCES is the number of copies of spark workers running on a single box. If you change the number you change how the hardware you have is split up (useful for breaking large servers into <32GB heaps each which perform better) but doesn't change the amount of hardware you h

worker_instances vs worker_cores

2014-10-20 Thread anny9699
Hi, I have a question about the worker_instances setting and worker_cores setting in aws ec2 cluster. I understand it is a cluster and the default setting in the cluster is *SPARK_WORKER_CORES = 8 SPARK_WORKER_INSTANCES = 1* However after I changed it to *SPARK_WORKER_CORES = 8 SPARK_WORKER_INS