Question

Point out the correct statement.

(a) chukwa supports two different reliability strategies

(b) chukwaCollector.asyncAcks.scantime affects how often collectors will check the filesystem for commits

(c) chukwaCollector.asyncAcks.scanperiod defaults to thrice the rotation interval

(d) all of the mentioned

This question was posed to me in an interview.

I want to ask this question from Chuckwa with Hadoop in chapter Incubator Projects, Chuckwa, Ambari, Knox and Hadoop Development Tools of Hadoop

Answer 1

Right choice is (a) chukwa supports two different reliability strategies

To explain I would say: The first, default strategy, is as follows: collectors write data to HDFS, and as soon as the HDFS write call returns success, report success to the agent, which advances its checkpoint state.