Very interesting! I'll be watching this project go forward. Like the back-flow Ack too! Simple and effective.
Thank you! On Thursday, October 2, 2014 10:41:16 AM UTC-5, Michael Frank wrote: > > sounds to me like a use case for akka-streams: > > http://akka.io/news/2014/09/12/akka-streams-0.7-released.html > > note that akka-streams is still in development preview. if you don't want > to hitch your cart to it yet, why don't you modify the storage actor to > send an Ack message back upstream to the reader actor, signalling readiness > to read more data? > > -Michael > > On 10/02/14 08:22, tigerfoot wrote: > > Hello, > > I have a system that does the following: read/parse from a huge > (150+GB) file of data, run sanity/cleaning operations, and store the > cleaned records in my DB. > I've got this configured using actors such that each time I read an object > from the input file I send a message to the cleaner actor. When that > object is cleaned I send a > message to the storage actor. (The real application is more complex but > this example illustrates the problem.) > > read --> clean --> store > > Simple on the surface. My problem is that each of these operations > takes different amounts of time. Reading takes say 2 time unit, leaning > takes 1, and storage takes 4. > That means I've got a bottleneck on storage and even if I use a > round-robin dispatcher I still run the risk of overflow and data loss on > the mailbox on the storage actor. > > Other than massive over-provision of storage actors, is there another > way? Can something within the actor ecosystem provide back-pressure so > that I can slow down > the reader just enough to keep the pipeline clean? > > Thanks, > Greg > -- > >>>>>>>>>> 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.
