Have you read this thread ? http://search-hadoop.com/m/uOzYttXZcg1M6oKf2/HDFS+cache&subj=RE+hadoop+hdfs+cache+question+do+client+processes+share+cache+
Cheers On Mon, Jan 25, 2016 at 1:23 PM, Jia Zou <[email protected]> wrote: > I configured HDFS to cache file in HDFS's cache, like following: > > hdfs cacheadmin -addPool hibench > > hdfs cacheadmin -addDirective -path /HiBench/Kmeans/Input -pool hibench > > > But I didn't see much performance impacts, no matter how I configure > dfs.datanode.max.locked.memory > > > Is it possible that Spark doesn't know the data is in HDFS cache, and > still read data from disk, instead of from HDFS cache? > > > Thanks! > > Jia >
