ed49122429
Because we are averaging the interval and not the value, we need to subtract one from the total we are dividing by. Whoops. Signed-off-by: Dan McGee <dan@archlinux.org>
87 lines
3.2 KiB
Python
87 lines
3.2 KiB
Python
from django.db.models import Avg, Count, Max, Min, StdDev
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from main.utils import cache_function
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from .models import MirrorLog, MirrorProtocol, MirrorUrl
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import datetime
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default_cutoff = datetime.timedelta(hours=24)
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@cache_function(300)
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def get_mirror_statuses(cutoff=default_cutoff):
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cutoff_time = datetime.datetime.utcnow() - cutoff
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protocols = list(MirrorProtocol.objects.filter(is_download=True))
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# I swear, this actually has decent performance...
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urls = MirrorUrl.objects.select_related('mirror', 'protocol').filter(
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mirror__active=True, mirror__public=True,
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protocol__in=protocols,
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logs__check_time__gte=cutoff_time).annotate(
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check_count=Count('logs'),
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success_count=Count('logs__duration'),
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last_sync=Max('logs__last_sync'),
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last_check=Max('logs__check_time'),
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duration_avg=Avg('logs__duration'),
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duration_stddev=StdDev('logs__duration')
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).order_by('-last_sync', '-duration_avg')
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# The Django ORM makes it really hard to get actual average delay in the
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# above query, so run a seperate query for it and we will process the
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# results here.
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times = MirrorLog.objects.filter(is_success=True, last_sync__isnull=False,
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check_time__gte=cutoff_time)
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delays = {}
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for log in times:
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d = log.check_time - log.last_sync
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delays.setdefault(log.url_id, []).append(d)
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if urls:
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last_check = max([u.last_check for u in urls])
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num_checks = max([u.check_count for u in urls])
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check_info = MirrorLog.objects.filter(
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check_time__gte=cutoff_time).aggregate(
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mn=Min('check_time'), mx=Max('check_time'))
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if num_checks > 1:
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check_frequency = (check_info['mx'] - check_info['mn']) \
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/ (num_checks - 1)
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else:
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check_frequency = None;
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else:
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last_check = None
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num_checks = 0
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check_frequency = None
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for url in urls:
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url.completion_pct = float(url.success_count) / num_checks
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if url.id in delays:
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url_delays = delays[url.id]
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d = sum(url_delays, datetime.timedelta()) / len(url_delays)
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url.delay = d
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hours = d.days * 24.0 + d.seconds / 3600.0
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url.score = hours + url.duration_avg + url.duration_stddev
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else:
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url.delay = None
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url.score = None
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url.completion = 0.0
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return {
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'cutoff': cutoff,
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'last_check': last_check,
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'num_checks': num_checks,
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'check_frequency': check_frequency,
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'urls': urls,
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}
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@cache_function(300)
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def get_mirror_errors(cutoff=default_cutoff):
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cutoff_time = datetime.datetime.utcnow() - cutoff
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errors = MirrorLog.objects.filter(
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is_success=False, check_time__gte=cutoff_time,
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url__mirror__active=True, url__mirror__public=True).values(
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'url__url', 'url__protocol__protocol', 'url__mirror__country',
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'error').annotate(
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error_count=Count('error'), last_occurred=Max('check_time')
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).order_by('-last_occurred', '-error_count')
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return list(errors)
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# vim: set ts=4 sw=4 et:
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