RE: Help me understand hadoop caching behavior

First, Hadoop itself doesn’t have any caching. Secondly, if it is a mapper only job, then the data doesn’t go through the network. So look at somewhere else  From: Avery, John [mailto:jav...@akamai.com] Sent: Wednesday, December 27, 2017 3:20 PM To: user@hadoop.apache.org Subject: Help me

Re: Help me understand hadoop caching behavior

Nevermind. I found my stupid mistake. I didn’t reset a variable…this fact had escaped me for the past two days. From: "Avery, John" Date: Wednesday, December 27, 2017 at 4:20 PM To: "user@hadoop.apache.org" Subject: Help me understand hadoop caching

Help me understand hadoop caching behavior

I’m writing a program using the C API for Hadoop. I have a 4-node cluster. (Cluster was setup according to https://www.tutorialspoint.com/hadoop/hadoop_multi_node_cluster.htm) Of the 4 nodes, one is the namenode and a datanode, the others are datanodes (with one being a secondary namenode).