Spark Optimization | Broadcast Variable with Demo | Session - 1 | LearntoSpark

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In this video, we will learn about one of the optimization technique in Spark, Broadcast Variable with Demo in both PySpark and in Spark with Scala.

git repo for dataset:

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Thank you for your video, very useful

aniabouadi

Hi.. Nice one.. Please make a video on scala class

shilpasthavarmath

some time while creating a new cluster in databricks it is taking long time, even after for some time also cluster is not creating.

Tried terminating/Deleting the cluster and created new one, also same issue

ranganath

Thanks a lot, nice .. how to access broadcast variables inside the UDFs ?

SpiritOfIndiaaa

I want to update the value of the broadcast variable after each iteration in the loop. Is it possible?

satyamverma

Why broadcast is useful in this scenario, i mean we can add directly the state name in input file

allinonetutorials

What is the difference of destroy and unpersist? Are both remove the data from cache memory?

preethamp

Ur videos are very good and helps me a lot

praneethbhat

Broadcast variables never get copied over to Executors memory. What if my broadcast data is 1Gb and I have 10 executors. Will that 1GB gets copied to 10 executors? means 1GB is replicated to 10GB which is not a right approach..
Broadcast variables are copied to executed memory only whenever its required and also it doesn't copy entire data at once. It uses Torrent Broadcast algorithm internally.

dileepkumar-ndfo

bro, can broadcast be used only with UDF, I tried like below and its not working., could you pls have a look

df.withColumn('City_Name',
# NameError: name 'State_Code' is not defined
df.withColumn('City_Name', # (this works just fine)

bhanubrahmadesam

How to populate a default value when there is no match

bhanubrahmadesam

Informative video... can you please create one video on accumulator as well🙂

MrManishelectra

Hi Azarudeen...Can you please share similar video on Broadcast Join using IntelliJ Sbt? Your videos are really helpful

dippusingh

Bro could you put one video to read hbase table in to structure..

maheshk

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