On 03/11/10 02:05, Lance Norskog wrote:
Virtual Machines like VMWare give you a lot of control over this.
They're a pain to set up but in production this might be the most
stable solution.
gives you a big IO perf hit though. VMs are good for agile clusters
which only exist for a short period of time -and whose size varies on
load. You can also set up a secure cluster. But for turning perf
problems, I'm not sure its the right answer
-as well as ionice, there is iotop to measure what is doing the IO load.
You need to know what the problem is (CPU, IO, garbage collection,
contention for the namenode, swapping) to decide what to tune.
Anything anyone could write up on this would be lovely.
-steve
