statsd - Graphite summarize returning inconsistent data -

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i've set two-node graphite cluster connected using carbon-relay:

graphite cluster

i sent 500 counters metric cluster-test-500 on ~1min period, @ approximately 60/10 seconds.

based on aggregation rules:

meta data:   aggregation method: sum   max retention: 31536000   xfilesfactor: 0  archive 0 info:   offset: 52   seconds per point: 10   points: 2160   retention: 21600   size: 25920  archive 1 info:   offset: 25972   seconds per point: 60   points: 10080   retention: 604800   size: 120960  archive 2 info:   offset: 146932   seconds per point: 600   points: 52560   retention: 31536000   size: 630720

the data appeared in both nodes' whisper dbs:

data: 12 63 61 62 63 60 61 57 0  data: 261 239 0  data: 500 0

then, when queried graphite using summarize function, on past day:

http://graphite.mysite.com/render?target=summarize(stats.counters.cluster-test-500.*.*.*.count,"1day","sum","false")&format=json&tz=utc&from=18:00_20130923&until=18:00_20130924

it returns inconsistent results re-running same query:

[{"target": "summarize(stats.counters.cluster-test-500.count, \"1day\", \"sum\", true)", "datapoints": [[302.0, 1379959260]]}] [{"target": "summarize(stats.counters.cluster-test-500.count, \"1day\", \"sum\", true)", "datapoints": [[500.0, 1379959260]]}] [{"target": "summarize(stats.counters.cluster-test-500.count, \"1day\", \"sum\", true)", "datapoints": [[261.0, 1379959260]]}] [{"target": "summarize(stats.counters.cluster-test-500.count, \"1day\", \"sum\", true)", "datapoints": [[63.0, 1379959260]]}]

which appears result seemingly random summations of time segments in whisperdb file. on earth causing this?


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