Apache Hadoop is a framework that allows for the distributed processing of large data sets across clusters of computers. It is designed to scale up from single servers to thousands of machines. The library itself is designed to detect and handle failures at the application layer, so delivering a ...

learn more… | top users | synonyms

1
vote
1answer
120 views

How often does the Impala StateStore refresh?

I am using Hive and Impala on the same cluster. I find that when I create new tables, the Impala StateStore does not refresh automatically even after a few hours. I know that I can accomplish this by ...
1
vote
0answers
256 views

Enabling JMX For Hadoop HDFS & Also MapReduce

I'm having a hard time figuring out how to enable JMX to submit metrics for HDFS and MapReduce jobs in Hadoop (CDH4). I've seen several links and read through 'The Definitive Guide' and 'Hadoop ...
0
votes
0answers
14 views

Are rfiles in Accumulo and hfiles in Hbase similar in structure and purpose?

I cannot seem to find much info on rfiles other than the Accumulo site and from what I can gather from the information I cannot deduce whether like hfiles they are based on Mapfiles and meant to store ...