Explanation:io.sort.factor limits the number of open files and compression codecs during the merge. 2. Point out the correct statement :
A. The number of sorted map outputs fetched into memory before being merged to disk
B. The memory threshold for fetched map outputs before an in-memory merge is finished
C. The percentage of memory relative to the maximum heapsize in which map outputs may not be retained during the reduce
D. None of the mentioned
Answer:A
Explanation:io.sort.factor limits the number of open files and compression codecs during the merge. 2. Point out the correct statement :
A. The number of sorted map outputs fetched into memory before being merged to disk B. The memory threshold for fetched map outputs before an in-memory merge is finished C. The percentage of memory relative to the maximum heapsize in which map outputs may not be retained during the reduce D. None of the mentioned
Explanation:When the reduce begins, map outputs will be merged to disk until those that remain are under the resource limit this defines. 3. Map output larger than ___ percent of the memory allocated to copying map outputs.