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Ensure new metrics are watermarked early.

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With the checking of fingerprint freshness to cull stale metrics
from queries, we should write watermarks early to aid in more
accurate responses.
This commit is contained in:
Matt T. Proud 2013-06-21 09:42:45 +02:00 committed by Julius Volz
parent de8757f925
commit a1a23fbaf8
1 changed files with 11 additions and 9 deletions
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20
storage/metric/leveldb.go
View file

@ -488,26 +488,28 @@ func (l *LevelDBMetricPersistence) refreshHighWatermarks(groups map[model.Finger
batch := leveldb.NewBatch()
defer batch.Close()
mutationCount := 0
value := &dto.MetricHighWatermark{}
for fingerprint, samples := range groups {
value := &dto.MetricHighWatermark{}
newestSampleTimestamp := samples[len(samples)-1].Timestamp
value.Reset()
present, err := l.MetricHighWatermarks.Get(fingerprint.ToDTO(), value)
if err != nil {
return err
}
newestSampleTimestamp := samples[len(samples)-1].Timestamp
if !present {
value.Timestamp = proto.Int64(newestSampleTimestamp.Unix())
batch.Put(fingerprint.ToDTO(), value)
continue
}
// BUG(matt): Repace this with watermark management.
if newestSampleTimestamp.Before(time.Unix(*value.Timestamp, 0)) {
continue
if !newestSampleTimestamp.Before(time.Unix(value.GetTimestamp(), 0)) {
value.Timestamp = proto.Int64(newestSampleTimestamp.Unix())
batch.Put(fingerprint.ToDTO(), value)
}
value.Timestamp = proto.Int64(newestSampleTimestamp.Unix())
batch.Put(fingerprint.ToDTO(), value)
mutationCount++
}
err = l.MetricHighWatermarks.Commit(batch)