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[pyspark 2.3+] Dedupe records - Spark - [mail # user]
...Hi Rishi,1. Dataframes are RDDs under the cover. If you have unstructured data or ifyou know something about the data through which you can optimize thecomputation. you can go with RDDs. Els...
   Author: Sonal Goyal , 2020-05-30, 04:26
How to populate all possible combination values in columns using Spark SQL - Spark - [mail # user]
...As mentioned in the comments on SO, can you provide a (masked) sample ofthe data? It will be easier to see what you are trying to do if you add theyear columnThanks,SonalNube Technologies On...
   Author: Sonal Goyal , 2020-05-07, 05:29
[pyspark] Load a master data file to spark ecosystem - Spark - [mail # user]
...How does your tree_lookup_value function work?Thanks,SonalNube Technologies On Fri, Apr 24, 2020 at 8:47 PM Arjun Chundiran  wrote:> Hi Team,>> I have asked this question in st...
   Author: Sonal Goyal , 2020-04-25, 04:58
Is RDD thread safe? - Spark - [mail # user]
...the RDD or the dataframe is distributed and partitioned by Spark so as toleverage all your workers (CPUs) effectively. So all the Dataframeoperations are actually happening simultaneously on...
   Author: Sonal Goyal , 2019-11-19, 13:46
Is it possible to rate limit an UDP? - Spark - [mail # user]
...Have you tried controlling the number of partitions of the dataframe? Sayyou have 5 partitions, it means you are making 5 concurrent calls to theweb service. The throughput of the web servic...
   Author: Sonal Goyal , 2019-01-09, 11:12
Error in show() - Spark - [mail # user]
...It says serialization error - could there be a column value which is notgetting parsed as int in one of the rows 31-60? The relevant Python code inserializers.py which is throwing the error ...
   Author: Sonal Goyal , 2018-09-08, 14:24
[External Sender] How to debug Spark job - Spark - [mail # user]
...You could also try to profile your program on the executor or driver byusing jvisualvm or yourkit to see if there is any memory/cpu optimizationyou could do.Thanks,SonalNube Technologies On ...
   Author: Sonal Goyal , 2018-09-08, 14:17
Default Java Opts Standalone - Spark - [mail # user]
...Hi Eevee,For the executor, have you trieda. Passing --conf "spark.executor.extraJavaOptions=-XX" as part of thespark-submit command line if you want it application specific ORb. Setting spar...
   Author: Sonal Goyal , 2018-08-30, 17:23
Spark code to write to MySQL and Hive - Spark - [mail # user]
...If you have the flexibility to append a new column to the table, you couldadd an isUpdated column which by default is 0. so mysqlDF would read therows with isUpdated=0 and newDF would insert...
   Author: Sonal Goyal , 2018-08-30, 06:26
Pitfalls of partitioning by host? - Spark - [mail # user]
...Hi Patrick,Sorry is there something here that helps you beyond repartition(number ofpartitons) or calling your udf on foreachPartition? If your data is ondisk, Spark is already partitioning ...
   Author: Sonal Goyal , 2018-08-28, 17:04