Probably the yellow warning message can be confusing even more than not receiving an answer/opinion on his post.
Best, Ovidiu > On 08 Aug 2016, at 20:10, Sean Owen <so...@cloudera.com> wrote: > > I also don't know what's going on with the "This post has NOT been > accepted by the mailing list yet" message, because actually the > messages always do post. In fact this has been sent to the list 4 > times: > > https://www.mail-archive.com/search?l=user%40spark.apache.org&q=dueckm&submit.x=0&submit.y=0 > > On Mon, Aug 8, 2016 at 3:03 PM, Chris Mattmann <mattm...@apache.org> wrote: >> >> >> >> >> >> On 8/8/16, 2:03 AM, "matthias.du...@fiduciagad.de" >> <matthias.du...@fiduciagad.de> wrote: >> >>> Hello, >>> >>> I write to you because I am not really sure whether I did everything right >>> when registering and subscribing to the spark user list. >>> >>> I posted the appended question to Spark User list after subscribing and >>> receiving the "WELCOME to user@spark.apache.org" mail from >>> "user-h...@spark.apache.org". >>> But this post is still in state "This post has NOT been accepted by the >>> mailing list yet.". >>> >>> Is this because I forgot something to do or did something wrong with my >>> user account (dueckm)? Or is it because no member of the Spark User List >>> reacted to that post yet? >>> >>> Thanks a lot for yout help. >>> >>> Matthias >>> >>> Fiducia & GAD IT AG | www.fiduciagad.de >>> AG Frankfurt a. M. HRB 102381 | Sitz der Gesellschaft: Hahnstr. 48, 60528 >>> Frankfurt a. M. | USt-IdNr. DE 143582320 >>> Vorstand: Klaus-Peter Bruns (Vorsitzender), Claus-Dieter Toben (stv. >>> Vorsitzender), >>> >>> Jens-Olaf Bartels, Martin Beyer, Jörg Dreinhöfer, Wolfgang Eckert, Carsten >>> Pfläging, Jörg Staff >>> Vorsitzender des Aufsichtsrats: Jürgen Brinkmann >>> >>> ----- Weitergeleitet von Matthias Dück/M/FAG/FIDUCIA/DE am 08.08.2016 10:57 >>> ----- >>> >>> Von: dueckm <matthias.du...@fiduciagad.de> >>> An: user@spark.apache.org >>> Datum: 04.08.2016 13:27 >>> Betreff: Are join/groupBy operations with wide Java Beans using Dataset API >>> much slower than using RDD API? >>> >>> ________________________________________ >>> >>> >>> >>> Hello, >>> >>> I built a prototype that uses join and groupBy operations via Spark RDD API. >>> Recently I migrated it to the Dataset API. Now it runs much slower than with >>> the original RDD implementation. >>> Did I do something wrong here? Or is this a price I have to pay for the more >>> convienient API? >>> Is there a known solution to deal with this effect (eg configuration via >>> "spark.sql.shuffle.partitions" - but now could I determine the correct >>> value)? >>> In my prototype I use Java Beans with a lot of attributes. Does this slow >>> down Spark-operations with Datasets? >>> >>> Here I have an simple example, that shows the difference: >>> JoinGroupByTest.zip >>> <http://apache-spark-user-list.1001560.n3.nabble.com/file/n27473/JoinGroupByTest.zip> >>> - I build 2 RDDs and join and group them. Afterwards I count and display the >>> joined RDDs. (Method de.testrddds.JoinGroupByTest.joinAndGroupViaRDD() ) >>> - When I do the same actions with Datasets it takes approximately 40 times >>> as long (Methodd e.testrddds.JoinGroupByTest.joinAndGroupViaDatasets()). >>> >>> Thank you very much for your help. >>> Matthias >>> >>> PS1: excuse me for sending this post more than once, but I am new to this >>> mailing list and probably did something wrong when registering/subscribing, >>> so my previous postings have not been accepted ... >>> >>> PS2: See the appended screenshots taken from Spark UI (jobs 0/1 belong to >>> RDD implementation, jobs 2/3 to Dataset): >>> <http://apache-spark-user-list.1001560.n3.nabble.com/file/n27473/jobs.png> >>> >>> <http://apache-spark-user-list.1001560.n3.nabble.com/file/n27473/Job_RDD_Details.png> >>> >>> <http://apache-spark-user-list.1001560.n3.nabble.com/file/n27473/Job_Dataset_Details.png> >>> >>> >>> >>> >>> -- >>> View this message in context: >>> http://apache-spark-user-list.1001560.n3.nabble.com/Are-join-groupBy-operations-with-wide-Java-Beans-using-Dataset-API-much-slower-than-using-RDD-API-tp27473.html >>> Sent from the Apache Spark User List mailing list archive at Nabble.com. >>> >>> --------------------------------------------------------------------- >>> To unsubscribe e-mail: user-unsubscr...@spark.apache.org >>> >> >> >> --------------------------------------------------------------------- >> To unsubscribe e-mail: user-unsubscr...@spark.apache.org >> > > --------------------------------------------------------------------- > To unsubscribe e-mail: user-unsubscr...@spark.apache.org > --------------------------------------------------------------------- To unsubscribe e-mail: user-unsubscr...@spark.apache.org
