int
server_can_do_estimate(
disk_t *dp,
info_t *info,
int level)
{
gint64 size;
int stats;
size = internal_server_estimate(dp, info, level, &stats);
return stats;
}
int
server_can_do_estimate(
disk_t *dp,
info_t *info,
int level,
tapetype_t *tapetype)
{
int stats;
internal_server_estimate(dp, info, level, &stats, tapetype);
return stats;
}
gint64
internal_server_estimate(
disk_t *dp,
info_t *info,
int level,
int *stats)
{
int j;
gint64 size = 0;
*stats = 0;
if (level == 0) { /* use latest level 0, should do extrapolation */
gint64 est_size = (gint64)0;
int nb_est = 0;
for (j=NB_HISTORY-2; j>=0; j--) {
if (info->history[j].level == 0) {
if (info->history[j].size < (gint64)0) continue;
est_size = info->history[j].size;
nb_est++;
}
}
if (nb_est > 0) {
size = est_size;
*stats = 1;
} else if (info->inf[level].size > (gint64)1000) { /* stats */
size = info->inf[level].size;
*stats = 1;
} else {
char *conf_tapetype = getconf_str(CNF_TAPETYPE);
tapetype_t *tape = lookup_tapetype(conf_tapetype);
size = (gint64)1000000;
if (size > tapetype_get_length(tape)/2)
size = tapetype_get_length(tape)/2;
*stats = 0;
}
} else if (level == info->last_level) {
/* means of all X day at the same level */
#define NB_DAY 30
int nb_day = 0;
gint64 est_size_day[NB_DAY];
int nb_est_day[NB_DAY];
for (j=0; j<NB_DAY; j++) {
est_size_day[j] = (gint64)0;
nb_est_day[j] = 0;
}
for (j=NB_HISTORY-2; j>=0; j--) {
if (info->history[j].level <= 0) continue;
if (info->history[j].size < (gint64)0) continue;
if (info->history[j].level == info->history[j+1].level) {
if (nb_day <NB_DAY-1) nb_day++;
est_size_day[nb_day] += info->history[j].size;
nb_est_day[nb_day]++;
} else {
nb_day=0;
}
}
nb_day = info->consecutive_runs + 1;
if (nb_day > NB_DAY-1) nb_day = NB_DAY-1;
while (nb_day > 0 && nb_est_day[nb_day] == 0) nb_day--;
if (nb_est_day[nb_day] > 0) {
size = est_size_day[nb_day] / (gint64)nb_est_day[nb_day];
*stats = 1;
}
else if (info->inf[level].size > (gint64)1000) { /* stats */
size = info->inf[level].size;
*stats = 1;
}
else {
int level0_stat;
gint64 level0_size;
char *conf_tapetype = getconf_str(CNF_TAPETYPE);
tapetype_t *tape = lookup_tapetype(conf_tapetype);
level0_size = internal_server_estimate(dp, info, 0, &level0_stat);
size = (gint64)10000;
if (size > tapetype_get_length(tape)/2)
size = tapetype_get_length(tape)/2;
if (size > level0_size/2)
size = level0_size/2;
*stats = 0;
}
}
else if (level == info->last_level + 1) {
/* means of all first day at a new level */
gint64 est_size = (gint64)0;
int nb_est = 0;
for (j=NB_HISTORY-2; j>=0; j--) {
if (info->history[j].level <= 0) continue;
if (info->history[j].size < (gint64)0) continue;
if (info->history[j].level == info->history[j+1].level + 1 ) {
est_size += info->history[j].size;
nb_est++;
}
}
if (nb_est > 0) {
size = est_size / (gint64)nb_est;
*stats = 1;
} else if (info->inf[level].size > (gint64)1000) { /* stats */
size = info->inf[level].size;
*stats = 1;
} else {
int level0_stat;
gint64 level0_size;
char *conf_tapetype = getconf_str(CNF_TAPETYPE);
tapetype_t *tape = lookup_tapetype(conf_tapetype);
level0_size = internal_server_estimate(dp, info, 0, &level0_stat);
size = (gint64)100000;
if (size > tapetype_get_length(tape)/2)
size = tapetype_get_length(tape)/2;
if (size > level0_size/2)
size = level0_size/2;
*stats = 0;
}
}
return size;
}