QUESTION $5$

a$)$ Describe the following technology terms, functionality, and cloud services associated with the Google cloud platform.

$($i$)$ Hadoop Distributed File System $($HDFS$)$

$($ii$)$ BigTable

$($iii$)$MapReduce

b$)$ Both GFS and Bigtable make the same core design choice $-$ to have a single master. What are the repercussions of a failure of this single master in each case?

c$)$ Explain why the Google infrastructure supports three separate data storage facilities.

$(4)$

d$)$ Why does Google not just adopt a commercial distributed database intead of three separate services?