I've been running a number of tests on the Fine Grained scaling aspect on Myriad. Here's a few notes:
1. After the patches it seems stable, I'm able to run multiple terasort/pi jobs and a few scalding jobs without difficulty. 2. Noticed with jobs with short map tasks (8-12 secs), I rarely got more than two containers per node, I'm curious if I'm not consuming resources fast enough. The issue goes away on the reduce side (able to get far better utilization of offers). The issue can be lessened by increasing mapred.splits.min.size and mapred.splits.max.size. This may be an issue for things like Hive. Darin
