Performance Analysis of ZNS-aware File Systems on Distributed Applications.

Recently, ZNS SSDs have been actively researched to handle the functions of the FTL directly on the host system. ZNS SSDs can improve the I/O performance and spatial efficiency of SSDs by eliminating GC and eliminating overprovisioning. In this paper, we analyze the performance by running distributed applications on a file system which supports ZNS SSDs. We found that much of the time difference occurs in the process of executing open and unlink operations rather than the performance of read and write operations. It has been confirmed that the performance difference of read/write operations is not significant for the applications. If structural optimization is made on file system, it has been found that ZNS SSDs are better than CNS SSDs of the same capacity in terms of price.