r16248@catbus: nickm | 2007-10-28 19:42:14 -0400

Do not count a server as having any WFU until we have known about it for 18 hours (weighted).


svn:r12261
This commit is contained in:
Nick Mathewson 2007-10-28 23:44:57 +00:00
parent 5f8bd6e6a4
commit 30e73f3a5e
2 changed files with 7 additions and 0 deletions

View File

@ -23,6 +23,8 @@ Changes in version 0.2.0.10-alpha - 2007-1?-??
- Directory authorities now decide whether routers are stable enough to
be guards based not on their MTBF or their uptime, but on their
fractional uptime: the fraction of the time that they are online.
(No router counts as having uptime until we've known about it for
at least 24 hours.)
- Clients new hold circuitless TLS connections open for 1.5 times
MaxCircuitDirtiness, since it is likely that they'll need to build
a circuit over them within that timeframe. Previously, they held them

View File

@ -384,6 +384,9 @@ get_stability(or_history_t *hist, time_t when)
return total / total_weights;
}
/* Until we've known about you for this long, you simply can't be up. */
#define MIN_WEIGHTED_TIME_TO_BE_UP (18*60*60)
/** Helper: Return the weighted percent-of-time-online of the router with
* history <b>hist</b>. */
static double
@ -399,6 +402,8 @@ get_weighted_fractional_uptime(or_history_t *hist, time_t when)
} else if (hist->start_of_downtime) {
total += (when - hist->start_of_downtime);
}
if (total < MIN_WEIGHTED_TIME_TO_BE_UP)
return 0.0;
return ((double) up) / total;
}