Hi, I'm playing with a small HB cluster and one one box running the RS stands out from the rest: * it uses more CPU, more memory * has much higher disk read rate * even higher disk write rate * much higher network traffic rate on lo interface
I'm wondering if writes are not being spread well, and if this server is just being hotspotted. What is the best way to check this? Also, the RS log on that machine is full of messages like these: 011-03-05 04:50:01,608 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 20.02 MB of total=169.78 MB 2011-03-05 04:50:01,610 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=20.03 MB, total=149.75 MB, single=93.37 MB, multi=75.47 MB, memory=0 KB Thanks, Otis ---- Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch Lucene ecosystem search :: http://search-lucene.com/
