python - Creating a Parquet file with PySpark on an AWS EMR cluster -

-

i'm trying spin spark cluster datbricks' csv package can create parquet files , stuff spark obviously.

this being done within aws emr, don't think i'm putting these options in correct place.

this command want send cluster spins up: spark-shell --packages com.databricks:spark-csv_2.10:1.4.0 --master yarn --driver-memory 4g --executor-memory 2g. i've tried putting on spark step - correct?

if cluster spun without being installed, how start pyspark package? correct: pyspark --packages com.databricks:spark-csv_2.10:1.4.0? can't tell if installed or not. not sure functions test

and in regards using package, correct creating parquet file:

df = sqlcontext.read.format('com.databricks.spark.csv').options(header='false').load('s3n://bucketname/nation.tbl', schema = customschema)  #is option1 df.write.parquet("s3n://bucketname/nation_parquet.parquet")  #or option2 df.select('nation_id', 'name', 'some_int', 'comment').write.parquet('com.databricks.spark.csv').save('s3n://bucketname/nation_parquet.tbl')

i'm not able find recent (mid 2015 , later) documentation regarding writing parquet file.

edit:

okay, i'm not sure if i'm creating dataframe correctly. if try run select queries on , show resultset, don't , instead error. here's tried running:

df = sqlcontext.read.format('com.databricks.spark.csv').options(header='false').load('s3n://bucketname/nation.tbl', schema = customschema)  df.registertemptable("region2")  tcp_interactions = sqlcontext.sql(""" select nation_id, name, comment region2 nation_id > 1 """)  tcp_interactions.show() #get weird java error: #caused by: java.lang.numberformatexception: input string: "0|algeria|0| haggle. final deposits detect slyly agai|"


Comments

Post a Comment

Popular posts from this blog

Load Balancing in Bluemix using custom domain and DNS SRV records -

-
i'm trying load balancing of application in bluemix using custom domain , srv record in dns manager. created own doamin ccbluemix.dynu.com , added custom domain bluemix. created application in region , created route custom domain myapp.ccbluemix.dynu.com deployed same application in uk region , created route custom domain myapp.ccbluemix.dynu.com there well. now whenever user hits route want load balancing between , uk region alternate requests served , uk regions. for created srv records like _http._tcp.ccbluemix.dynu.com srv eu-gb.mybluemix.net [priority: 0] [weight: 50] 10 _http._tcp.ccbluemix.dynu.com srv mybluemix.net [priority: 0] [weight: 50] 10 but nothing happening , i'm not able access application using custom route @ all. if create 'a' record cc-load-bal-app.ccbluemix.dynu.com 75.126.81.68 i can access app using custom route ends hitting server. how can achieve load balancing using srv records? wrong creating srv records here? i read ne...
Read more

oracle - pls-00402 alias required in select list of cursor to avoid duplicate column names -

-
my cursor : select xzis.msisdn msisdn, xzis.in_account_number in_account_number xxobw_zte_in_sync xzis not exists (select 1 hz_contact_points hcp, hz_cust_accounts hca hcp.owner_table_id = hca.party_id , hcp.owner_table_name = 'hz_parties' , hcp.phone_number = substr (xzis.msisdn, -8) , nvl (hca.attribute12, 'nil') = xzis.in_account_number); i have given alias columns, still facing issue. suggestions? it's cursor. 1 has no such problems. problem is, when you're joining 2 tables, or apply wrong aliases in subselect, cursor may @ end return 2 columns same name/alias. the problem not need alias, no 2 columns can have same alias (the name counting alias, when no alias given). apparently has happened, far can tell, it's ...
Read more

python - Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>] error -

-
Image
i getting same error when python manage.py runserver. there no such error when have ubuntu 15.10. got started when upgraded ubuntu 16.04. question might duplicate have tried solution provided question have applied command dpkg --configure -a, have done apt-get update,upgrade,dist-upgrade, clean, -f install. have reinstalled python2.7 , python3 no success though. here screenshot while trying run django application i got after re-installing python please me? bashrc file # ~/.bashrc: executed bash(1) non-login shells. # see /usr/share/doc/bash/examples/startup-files (in package bash-doc) # examples # if not running interactively, don't case $- in *i*) ;; *) return;; esac export pythonhome="/usr/bin/python" echo $virtualenvwrapper_python echo 'tushant' # don't put duplicate lines or lines starting space in history. # see bash(1) more options histcontrol=ignoreboth # append history file, don't overwrite shopt -s histappend # setting h...
Read more