You have an average key-value pair size of 100 bytes. Your primary access is random needs on
the table. Which of the following actions will speed up random reading performance on your
cluster?
A.
Turn off WAL on puts
B.
Increase the number of versions kept
C.
Decrease the block size
D.
Increase the block size
Explanation:
Larger block size is preferred if files are primarily for sequential access.
Smaller blocks are good for random access, but require more memory to hold the block index, and
may be slower to create
Reference: Could I improve HBase performance by reducing the hdfs block size?