Spark Join | Sort vs Shuffle vs Broadcast Join | Spark Interview Question

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#Spark #DeepDive #Internal: In this video , We have discussed in detail about the different way of how joins are performed by the Apache Spark
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Hi,

I like your Spark videos. Please create a dedicated video for top 100 most frequently used Spark Commands.

- Pankaj C

pankajchikhalwale

hello,
i find the content very interesting especially on when the hash join is better than the sort merge join. could you please tell me where you found the documentation on that?

wafa

great explanation, Thanks for valuable video :)

sumitgandhi

As per documentation for rdbms hash join is faster than sort merge. I am assuming for spark as well first step for both is shuffle where same value key ends up in Same partition. After that same process happens. Why in spark sort merge is mostly preferred.?

guptaashok

Nice video, also include some pictorial representation to visulize better

aneksingh

So Shuffle Hash Join and Sort Merge Join have the same shuffle phase? Why don't call it Shuffle Sort Merge Join? Because it sounds like there is no shuffle.

gemini_

Nice content, only thing is voice was very low. You can boost the volume after recording.

uruppadi

HI Viresh, the video has a great explanation. Thanks!! I am not sure about how to determine the limit associated with smaller table to fit in memory(Shuffle Hash Join case). Please help me with it.

srivatsaprajwal

what is the difference between broadcast join and mapside join. What was the need of broadcast join although mapside join was available earlier.Could you please explain if you have any idea on this.?

amritranjannayak

Step 1 is shuffle, but you mention, but at 11:49 you mention "There will be no shuffling if the data is colocated in the same partition",
How can data from tow tables to be merged be co-location in the same partition without any shuffling ?

pratiksingh

I felt like you are talking to yourself

prasadvenkataramasatyanand

Please improve your speech clarity and accent . You skip some syllables.

soumyapadhee

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