"RDBMS maintains just the state as relational tables." This is false, most RDBMSes maintains transaction logs. http://en.wikipedia.org/wiki/Transaction_log
On Fri, Aug 15, 2014 at 5:12 PM, Patrik Nordwall <patrik.nordw...@gmail.com> wrote: > > > > On Fri, Aug 15, 2014 at 4:08 PM, Prakhyat Mallikarjun < > prakhyat...@gmail.com> wrote: > >> Hi patrik, >> >> Very unkind response...but let me clarify in interest of the discussion. >> > > Excuse me. I guess I didn't read your questions literally as questions, > but as negative statements. > > >> I am not discussing my application specific use case. It is totally akka >> persistence related but taking no sql dbs sizing in picture. >> >> My post is not a critic on akka persistence. Let me clarify I want to use >> it and more precisely I am already working on it but I have my own doubts >> like this post which I want to clarify. >> >> Let me give you a small gist, hope I should be able to put my point >> clearly this time. >> My query is regarding akka persistence in highly oltp apps backed by no >> sql db for maintaing events and state. >> >> Akka persistence maintains changes to state as stream Of events to >> system. RDBMS maintains just the state as relational tables. >> >> Oltp apps with millions of transaction will create lot of changes to >> state. Obviously these state changes have be saved as events in akka >> persistence. >> >> If we use akka persistence with no sql for storing events and state, dont >> you think so disk will take up more space compared to RDBMS? As we have to >> store events plus state(if required)?Disk space requirement in no sql db >> will increase further if durability is required. >> > > Yes, it will probably require more disk space. > > Keep in mind that with event sourcing you keep a lot of potentially useful > information. You can see how you got to current state. For some > applications that is useful, for some it is not. Sometimes you don't know > in advance that you actually would like to have that information available > later. > > It is possible to store snapshots of current state to reduce recovery > times, and that makes it possible to remove old events if storage volume is > a problem. > > Regards, > Patrik > > >> >> I meant disk usage of akka persistence will grow faster wrt to oltp >> application? >> >> In my post I never referred akka persistence as bullet, hoping you will >> not feel the same again. >> >> -prakhyat m m >> >> -- >> >>>>>>>>>> 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. > -- Cheers, √ -- >>>>>>>>>> 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.
