No Allocation has slightly lower flash write ratio
than RWSS1 for Moodle and Fileserver only because it
does not incur cache replacement, as it is allowed to occupy as much cache space as possible, which is not a
realistic scenario for cloud environments. Compared to
LARC, RWSS1 achieves up to 3% higher hit ratio and still
reduces cache usage by up to 3% and the flash writes
by up to 18%, while using 580MB less staging area on
average. Comparing the two different configurations of
RWSS, RWSS2 reduces cache usage by up to 9% and
flash writes by up to 18%, at the cost of 4% lower hit
ratio, which confirms the tradeoff of choosing different
values of N in our proposed RWS model.