On Tue, Aug 19, 2014 at 1:35 PM, Martin Krasser <krass...@googlemail.com> wrote:
> > On 19.08.14 13:00, Roland Kuhn wrote: > > > 19 aug 2014 kl. 11:28 skrev Ashley Aitken <amait...@gmail.com>: > > > > On Tuesday, 19 August 2014 16:53:46 UTC+8, Martin Krasser wrote: >> >> >> journal -> akka actor(s) -> read model datastore >> >> when I can do this much more efficiently via >> >> journal -> spark -> read model datastore >> > >> directly, for example >> > > I am confused, are you suggesting that spark is talking to the journal > data store directly, without any involvement of Akka / Akka Persistence? > If so, it sounds like a great solution but why would that require an > extension to the Akka Persistence design/API? > > > Well, another comment is that spark uses Akka actors in its > implementation, so I don’t see why it would magically be “much more > efficient”. I think we are mixing up two concerns here, will reply later > when I can type properly again. > > > This is a misunderstanding. As mentioned in my previous message, scaling > reads through a single journal actor doesn't work, it's not about that I > see a general performance issue with Akka actors. > > > I think the integration "akka persistence -> kafka -> spark -> whatever" looks great, but not everybody has that infrastructure, and therefore we provide PersistentView as a simple way to replicate events to the read side, and then a de-normalized representation can be stored in whatever makes sense for the queries. Martin, what do you suggest? Removing PersistentView altogether? /Patrik > > Regards, > > Roland > > > > > > > -- > >>>>>>>>>> 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 akka-user+unsubscr...@googlegroups.com. > To post to this group, send email to akka-user@googlegroups.com. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. > > > > > *Dr. Roland Kuhn* > *Akka Tech Lead* > Typesafe <http://typesafe.com/> – Reactive apps on the JVM. > twitter: @rolandkuhn > <http://twitter.com/#%21/rolandkuhn> > > -- > >>>>>>>>>> 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 akka-user+unsubscr...@googlegroups.com. > To post to this group, send email to akka-user@googlegroups.com. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. > > > -- > Martin Krasser > > blog: http://krasserm.blogspot.com > code: http://github.com/krasserm > twitter: http://twitter.com/mrt1nz > > -- > >>>>>>>>>> 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 akka-user+unsubscr...@googlegroups.com. > To post to this group, send email to akka-user@googlegroups.com. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. > -- Patrik Nordwall Typesafe <http://typesafe.com/> - Reactive apps on the JVM Twitter: @patriknw -- >>>>>>>>>> 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 akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
