Dear All, I am currently running a 3 node HBase cluster with Amazon EC2 small instance (1CPU, 1.7GB Mem). After running a simple workload (type A) using YCSB benchmarking tool, I noticed in the Web UI that the number of regions in the 3 region servers are 7 but when I click to view the table details it shows there are 5 regions. I am a bit confuse. Does the Web UI showing wrong results? How can I check region details from the shell/is there any other command line tools for that? I am using Hbase 0.94.3 (as it is the latest version compatible with YCSB at this moment) with Hadoop-1.0.4.
Another thing, as you can see the maxHeapMB size is 991 (default setting) then whenever I am running workloads the server free memory status is terrible - almost 0MB for 1M/10M transactions (YCSB/Workload-A). My question is if the maxHeapMB is fixed at 1GB then why I am loosing extra 700MB memory? How can I monitor cpu/memory/io usage for individual cluster components (HBase/Hadoop/MapRed/ZK, etc.)? Is there any tool available with HBase? Thanks a lot. [image: Inline images 1] Regards, Joarder Kamal ------------------------------------------ PhD Student Gippsland School of Information Technology, Faculty of Information Technology, MONASH University Churchill VIC, Australia. 3842
