What is your blockcache hit rate like? Are your gets totally random across the namespace or is there any locality at all? Can you try turning it off on one of your regionservers and see how it does? Why you want to turn off the block cache, just because it is not being used? There are also these set of configs to try: http://hbase.apache.org/xref/org/apache/hadoop/hbase/io/hfile/CacheConfig.html#40 If locality of requests, the cache on write might help?
St.Ack On Fri, Mar 28, 2014 at 2:23 PM, Rendon, Carlos (KBB) <[email protected]>wrote: > Hi, > > If I have a workload where the access pattern is writing to and reading > from the same row, does it make sense to turn the blockcache off? In other > words, reads and writes to a given row always go together. Does each write > cause eviction of the cached block(s) that the row is stored in? I would > think so, but I couldn't find an answer to this anywhere online. > > Thanks, > Carlos >
