executed = # of times you called executed acked = # of executed tuples that you acked; ideally this will match executed emitted = # of tuples that you emitted; if you call emit more than once per execute call this can be higher than execute count transferred = # of tuples transferred downstream; if you have 2 bolts subscribing to your bolt, then this count can be higher than emitted.
On Mon, Feb 23, 2015 at 11:35 AM, Rahul Reddy <[email protected]> wrote: > Hi, > > Can you guys help me understand difference between emitted, transferred > and acked tuples. > > In my case every tuple emitted by ablog-filter-bolt will be processed by > ablog-flatten-xml-bolt which will then be written by ablog-hdfs-bolt to > hdfs. Ideally all metrics for executed/acked should match after tuples are > emitted from ablog-filter-bolt . I'm not sure why there is so much > discrepancy in emitted/transferredacked tuple count between these bolts > although it dosent show any failed tuples. > > Any ideas what I can check and how to interpret metrics correctly? > > Thanks > Rahul > >
