
72
seCurity and PrivaCy in smart Grids
assigned to the rest of servers J = J – { j} (step 5). In case the entire load
has been assigned (λ′
i
≤ 0), a machine that has not been allocated any
load can be powered down (step 6). It is also possible that there is a
fraction of the load that remains unassigned in spite of every machine
receiving a portion of the load. In such cases, the unassigned load
needs to be distributed among all the machines, and the operating
frequency of the machines needs to be increased by (f
max
/μ
max
)((λ′
i
/N)
+ (1/R
max
)) (step 7).
Next, we discuss the duration τ
i
for which an application can afford
to operate at threshold S ...