Reliability Assurance of Big Data in the Cloud

Appendix

Notation index

AFR

Annualized failure rate

A_j

Disk D surviving from t_j−1 to t_j

availableBW

Available bandwidth of the data transfer link

BA

Bandwidth allocation

C

Capacity of Proactive Replica Checking for Reliability (PRCR)

CI(f)

Checking interval of data file f

CIS

Set of checking interval values

D

Disk

deadline_cre

The deadline for data creation process

deadline_rec

The deadline for data recovery process

diff

Set of CI – scan cycle values of PRCR nodes

d_q

Disk q in the storage system S(d₁, d₂, d₃, …, d_n)

E_boot

Energy consumption for booting the router

E_halt

Energy consumption when the router is on halt

ET

Expected storage duration

E(t_i)

Pipeline status changing event at t_i

E_work

Energy consumption when the router is working

F(f₁, f ...