Hi, "emitted" is the number of output tuples the spout/bolt produces, while "transfered" is the number if tuples that get shipped to consumers. If you have two consumer bolts for a single spout/bolt, the "transfered" count will be twice the "emitted" count, because each emitted tuple gets transfered to each consumer.
Furthermore, the counters are collected as "snapshots" without synchronization. Thus, if the counters change fast, they do not yield a completely accurate picture because some value are already slightly outdated. -Matthias On 09/10/2015 07:27 AM, Chandrashekhar Kotekar wrote: > Hi, > > I would like to know where can I get more information about data > displayed in Storm UI. It seems like UI shows incorrect values. > > For example : For one of the Kafka spout, Storm UI is showing following > data : > > Emitted : 38820, Transferred : 38820, Complete Latency : 34826.594, > Acked : 17620, Failed : 22260 > > I would like to know what is the difference between 'Emitted' and > 'Transferred' and why 'Acked' + 'Failed' is not equal to 'Emitted'. > > Where can I get more information about these numbers? > > Regards, > Chandrash3khar Kotekar > Mobile - +91 8600011455
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