Konrad, Thank you for pointing me the correct direction. I'll give it a shot.
-Soumya On Saturday, December 27, 2014 7:48:30 AM UTC-5, Konrad Malawski wrote: > > Hi Soumya, > > I don’t think what you’ll end up measuring this way will be very useful. I > mean, between the completion of the future and the triggering of the map > there are multiple asynchronous boundaries… So you won’t be measuring how > fast the set operation was, but how much time was between these > asynchronous boundaries - which could have been backpressured by the way. > > > I suggest directly wrapping the set call with your measurement logic > instead - since that is what you want to measure it seems. > > > By the way, we do have a “timed” element, in our extras section: > https://github.com/akka/akka/blob/release-2.3-dev/akka-stream/src/main/scala/akka/stream/extra/Timed.scala > > You can `import Timed._` and then use it as shown here: > https://github.com/akka/akka/blob/release-2.3-dev/akka-stream-tests/src/test/scala/akka/stream/extra/FlowTimedSpec.scala > > It’s a rather old element and I’m not sure if we’ll be keeping it, but you > can use it as a source of inspiration in case you end up needing that kind > of measurement. > > > > > On 26 December 2014 at 05:46:55, Soumya Simanta ([email protected] > <javascript:>) wrote: > > This is related to this > <https://groups.google.com/forum/#!topic/akka-user/NrSkEwMrS3s> thread > but sufficiently different that I decided to create new thread. Hope that's > okay. > > I would like to create a histogram of latency of a large number of set > operations > ( set returns a Future[Boolean]) using LatencyUtils > <https://github.com/LatencyUtils/LatencyUtils> > > Basically I need to start recording the time before the set operation > (inside mapAsyncUnordered(k => redis.set(k + rnd, message))) and then > somehow record the end time in a map operation( .map( //record the end > time here) after this. I'm having a hard time trying to figure this out. > > My understanding is that the even though the mapAsyncUnordered doesn't > maintain the order of operations the map following the mapAsynUnordered will > maintain the order from the previous stage because of TCP maintaining the > order. Is this correct? > > > val redis = RedisClient("localhost") > > val random1 = UUID.randomUUID().toString > > def insertValues(rnd: String): Flow[Int, Boolean] = { > Flow[Int].mapAsyncUnordered(k => redis.set(k + rnd, message)).map( > //record the end time here) > } > > val blackhole = BlackholeSink > > val maxSeq = 5000000 > val seqSource = Source( () => (1 to maxSeq).iterator ) > *val streamWithSeqSource = > seqSource.via(insertValues(random1)).runWith(blackhole)* > > > -- > >>>>>>>>>> Read the docs: http://akka.io/docs/ > >>>>>>>>>> Check the FAQ: > http://doc.akka.io/docs/akka/current/additional/faq.html > >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user > --- > You received this message because you are subscribed to the Google Groups > "Akka User List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > To post to this group, send email to [email protected] > <javascript:>. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. > -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
