| //pon_off(): the probability that ON state changes to OFF state on hotspot data |
| //poff_on(): the probability that OFF state changes to ON state on hotspot data |
| //on_off_pb: ON-OFF parameter |
| //off_on_pb: OFF-ON parameter |
| //on_off_factor: the parameter used to adjust the load of requests |
| //ON state: generates a new request to a storage node |
| //OFF state: no request is generated |
| pon_off() = l/(on_off_pb − on_off_factor ()); |
| poff_on() = l/(off_on_pb + on_off_factor ()); |
| //decr_load_variation: the parameter is used to control the request’s decrement |
| //incr_load_variation: the parameter is used to control the request’s increment |
| //ss_on_off_prob(): the probability that ON state changes to OFF state in storage node |
| //ss_off_on_prob(): the probability that OFF state changes to ON state in storage node |
| //burstiness_factor: the parameter used to control the burstiness of request changes |
| //ON state: increases a request inside a storage node |
| //OFF state: a request has been processed inside a storage node |
| for : storage_node |
| request_change() = unifrnd(0, decr_load_variation + incr_load_variation); |
| if(request_change() <= decr_load_variation) |
| = (1 − decr_load_variation)/2; |
| else |
| = (1 − incr_load_variation)/2 + incr_load_variation; |
| end |
| ss_on_off_prob() = 1/ceil( burstiness_factor); |
| ss_off_on_prob() = 1/(burstiness_factor-ceil( burstiness_factor)); |
| end |
