Question-27: Select correct statements with regards to mount and sync option for Filesystem?

Question-27: Select correct statements with regards to mount and sync option for Filesystem?

2. Using the sync filesystem mount option increases performance for services that write data to disks, such as HDFS, YARN, Kafka and Kudu.
3. Using the sync filesystem mount option does not impact the performance for services that write data to disks, such as HDFS, YARN, Kafka and Kudu.
4. Using the sync filesystem mount option may or may not impact the performance for services that write data to disks, such as HDFS, YARN, Kafka and Kudu.

Answer:

Exp: The filesystem mount options have a sync option that allows you to write synchronously.

Using the sync filesystem mount option reduces performance for services that write data to disks, such as HDFS, YARN, Kafka and Kudu. In CDH, most writes are already replicated. Therefore, synchronous writes to disk are unnecessary, expensive, and do not measurably improve stability.