Improve Performance by a Fuzzy-Based Dynamic Replication Algorithm in Grid, Cloud, and Fog

Table 1

Comparison of various replica algorithms and considered parameters in replica selection, replica placement, and replica replacement sections.

Replica selection

Replica placement

Replica replacement

TD

SWL

SO

SS

FP

SWL

FP

CC

SS

NA

LA

FPO

NA

LA

RAT

FS

FPO

LFU [17]

—

—

—

—

—

—

—

—

—

—

—

—

—

—

LRU [18]

—

—

—

—

—

—

—

—

—

—

—

—

—

—

BHR [4]

—

—

—

—

—

—

—

—

—

—

—

—

—

HRS [2]

—

—

—

—

—

—

—

—

—

—

—

—

MBHR [19]

—

—

—

—

—

—

—

—

—

—

—

—

—

Fuzzy_Rep [23]

—

—

—

—

—

—

—

—

—

—

—

—

—

PPRA [27]

—

—

—

—

—

—

—

—

—

—

RPLB [20]

—

—

—

—

—

—

—

—

—

—

—

—

—

Method in [21]

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Method in [13]

—

—

—

—

—

—

—

—

—

—

—

CRP [14]

—

—

—

—

—

—

—

—

—

—

—

—

DRLBS [22]

—

—

—

—

—

—

—

—

—

—

D2R-IWD [24]

—

—

—

—

—

—

—

—

—

—

—

TD: transfer delay, SWL: storage queue workload, SO: search overhead, SS: the storage speed, FP: failure probability, CC: communication capacity, NA: number of accesses to file, LA: last access time, FPO: future file popularity, RAT: remote access time, and FS: file size.