All about Spark DAGs

This video talks about :
1. What is a DAG in spark ?
2. Why is it beneficial ?
3. How does spark create a DAG ?
4. DAG visualization

[@Themotivationstationpower]

Really appreciate your hard work. Thank you for the great explanation.

[@BigDataThoughts]

thanks

[@chinmaytornekar4683]

Thanks for such a clear Explanation!!Amazing Walk through the DAG visualization!!

[@BigDataThoughts]

Thanks

[@anuraggupta-xw2jm]

Very good explanation..appreciate your efforts..keep it up👍🏻

[@karthikbhat2945]

Clear and Precise Explanation. These videos needs more outreach

[@BigDataThoughts]

Thanks Karthik

[@souravkrburnwal3519]

Just Amazing!!! Detailed information through PPT walkthrough and great way to explain everything at once.

[@BigDataThoughts]

Thanks saurav

[@karthikeyanr1171]

your videos on spark are hidden gems

[@BigDataThoughts]

Thanks

[@souravdas9683ytm]

Logical plan is nothing but Lineage, which tells us how to create an RDD by applying what transformation. Whenever an action is called, this lineage will be converted into a DAG, basically a Physical plan.

[@TotuBabyBird]

Thanks for such a detailed and crystal clear explanation. ❤

[@BigDataThoughts]

Thanks Sumiran

[@user-fj9me2hd7m]

Awesome , Superb explanation. Good efforts.

[@BigDataThoughts]

Thanks

[@sanketdhamane5941]

Really Thanks to Good And Indepth Explantion

[@BigDataThoughts]

Thanks

[@pradyumnaanand6892]

Clear and simple explanation. Thanks a ton.

[@BigDataThoughts]

Thanks

[@user-zm2me1gc5z]

Nicely explained and thanks. helping a lot

[@ankitachauhan6084]

Great work

[@mattasid85]

Thanks Shreya, this was a very helpful and informative video like any other video of yours. Looking forward to more such content on your channel!

[@BigDataThoughts]

Thanks Sid

[@mateen161]

Nice explanation. Thank you!

[@BigDataThoughts]

Thanks

[@sonip472]

awesome explanation, thanks a lot.

[@BigDataThoughts]

Thanks soni

[@saiprakash6916]

very Informative and understandable. Thanks shreya

[@BigDataThoughts]

Thanks sai prakash

[@srikanth4788]

Great Explanation

[@BigDataThoughts]

Tha ks srikanth

[@satviknaren9681]

Really like your content !! really helpful ! thank you so much shreya

[@BigDataThoughts]

Thanks

[@syedmudasser631]

perfect explanation
keep it up...👍

[@BigDataThoughts]

Thanks

[@askdoubts6359]

Your all videos are grate and easy to understand.. please make more videos on spark with real time code examples

[@BigDataThoughts]

Thanks sure

[@reevarastogi6224]

very nice explanation!!

[@BigDataThoughts]

Thanks Reeva

[@channuangadi7504]

Very well explained

[@BigDataThoughts]

Thanks

[@syedhussain6358]

Excellent explanation

[@BigDataThoughts]

Thanks syed

[@ryas8360]

shouldn't linkage of RDD's represented by Lineage?

[@maheshalam7893]

It is great video and helps alot.. Shreya .
Interesting to know below .
1 . Why complete stage is skipped
2 . Shuffle should create different stage . But In snap of DAG , it is in same stage .

[@BigDataThoughts]

Thanks Mahesh

[@alokranjan7323]

He had questions as well

[@anirbansarkar6306]

Hi Ma'am, in that 16 stages snapshot, what is the difference between gray boxes and blue boxes?

[@prasadj6370]

Thanks for sharing the valuable information in most simplest way. It saved a lots of time in reading spark tutorial. sincere thanks to you.
I have one question - where can we see or generate this DAG visualization in spark ? We want to see the plan in case to analyse our spark programme ? Please let us know . 🙏 Thank you

[@BigDataThoughts]

Thanks Prasad yes DAG visualization can be seen on spark UI.

[@BigDataThoughts]

A detailed analysis stage wise can be done on the UI

[@artemvolkov5682]

I confused a bit... I just watched Spark Summit videos. It states that on Physical Planning stage Spark applies 'Strategy' (a function that converts a logical plan tree to a physical plan tree)... Where does DAG come into play?

[@BigDataThoughts]

Dag is created once a spark job is submitted. Think of the vertices as RDDs and the edges as the operations. The dag schedulers job is to convert the dag into stages and tasks that will perform actual execution .