Explanation:If the file is very small (“small” means significantly smaller than an HDFS block) and there are a lot of them, then each map task will process very little input, and there will be a lot of them (one per file), each of which imposes extra bookkeeping overhead. 6. The ________ option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.
A. archives
B. files
C. task
D. None of the mentioned
Answer:A
Explanation:If the file is very small (“small” means significantly smaller than an HDFS block) and there are a lot of them, then each map task will process very little input, and there will be a lot of them (one per file), each of which imposes extra bookkeeping overhead. 6. The ________ option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.
A. archives B. files C. task D. None of the mentioned
Explanation:Archives options is also a generic option. 7. ______________ class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys.