This blog post should clear it up: http://hortonworks.com/blog/an-introduction-to-hdfs-federation/
-----Original Message----- From: ch huang [mailto:justlo...@gmail.com] Sent: Wednesday, November 20, 2013 12:26 AM To: hdfs-dev@hadoop.apache.org Subject: is block pool on NN or DN? hi,all: i have a question about block pool,i read the code ,it seems block pool is on DN,but NN also has a block pool manager to manage all block pool,so the block pool also in NN?
