1. Yes, it's depends on instance type. Generally, number of map slots + number of reduce slots = number of ECU, number of map slots / number of reduce slots >= 3. You can customize these numbers. 2. Yes, Number of nodes * Running hours * Price per EMR node per hour (EMR node is a little bit more expensive than EC2 node) 3. Yes, you can find them in admin console.
On 19 July 2013 16:23, WangRamon <ramon_w...@hotmail.com> wrote: > Hi All > > We have a plan to move to Amazon AWS cloud, by doing some research i find > that i can start the map/reduce cluster in AWS with the following command: > % bin/hadoop-ec2 launch-cluster test-cluster 2 > > The command allows me to start a cluster with required nodes(no more than > 20, correct me if i were wrong), so here comes to my questions: > > 1. How does AWS know how many map/reduce slot should be configured to each > EC2 instance? Is it depends on the EC2 instance type (m1.large, > m1.xlarge...)? > 2. How it is charged? Nodes number * price per node per hour ? > 3. Is each node like a single EC2 instance in my admin console? > > Thanks in advance! > > Cheers > Ramon > >
