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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
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@ -23,6 +23,8 @@ Changes in version 0.2.0.10-alpha - 2007-1?-??
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- Directory authorities now decide whether routers are stable enough to
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be guards based not on their MTBF or their uptime, but on their
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fractional uptime: the fraction of the time that they are online.
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(No router counts as having uptime until we've known about it for
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at least 24 hours.)
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- Clients new hold circuitless TLS connections open for 1.5 times
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MaxCircuitDirtiness, since it is likely that they'll need to build
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a circuit over them within that timeframe. Previously, they held them
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@ -384,6 +384,9 @@ get_stability(or_history_t *hist, time_t when)
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return total / total_weights;
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}
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/* Until we've known about you for this long, you simply can't be up. */
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#define MIN_WEIGHTED_TIME_TO_BE_UP (18*60*60)
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/** Helper: Return the weighted percent-of-time-online of the router with
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* history <b>hist</b>. */
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static double
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@ -399,6 +402,8 @@ get_weighted_fractional_uptime(or_history_t *hist, time_t when)
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} else if (hist->start_of_downtime) {
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total += (when - hist->start_of_downtime);
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}
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if (total < MIN_WEIGHTED_TIME_TO_BE_UP)
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return 0.0;
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return ((double) up) / total;
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}
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