A slave node in your cluster has four 2TB hard drives installed (4 x 2TB). The DataNode is
configured to store HDFS blocks on the disks. You set the value of the dfs.datanode.du.reserved
parameter to 100GB. How does this alter HDFS block storage?
A.
A maximum of 100 GB on each hard drive may be used to store HDFS blocks
B.
All hard drives may be used to store HDFS blocks as long as atleast 100 GB in total is available
on the node
C.
100 GB on each hard drive may not be used to store HDFS blocks
D.
25 GB on each hard drive may not be used to store HDFS blocks
Answer is “C” –
dfs.datanode.du.reserved = The amount of space on “each volume” which cannot be used for HDFS block storage
0
0
I choose B
0
0