Re: Detecting/Predicting hotspots

2011-11-14 Thread Milind.Bhandarkar
Last year, Rini Kaushik and I authored a paper "GreenHDFS: Towards An Energy-Conserving, Storage-Efficient, Hybrid Hadoop Compute Cluster" at HotPower'10 (PDF here: http://www.usenix.org/event/hotpower10/tech/full_papers/Kaushik.pdf) that analyzed "hotness" of files based on real namenode audit logs

Detecting/Predicting hotspots

2011-11-12 Thread Bharath Ravi
Hi all, We're trying to perform some sort of monitoring on HDFS, that could detect when a datanode or a data-block is "hot". It would be useful to see patterns of popularity in live HDFS deployments. Would anyone know if there are any publicly available statistics on data access patterns that we