23. Databricks | Spark | Cache vs Persist | Interview Question | Performance Tuning

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18 июл 2021

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Комментарии : 52

@omprakashreddy4230 2 года назад

Only few people have ability to teach in way that even novice can understand. Hats off to you. Keep going !!!

@rajasdataengineering7585 2 года назад

Thank you for your encouraging words

@Poori1810 Год назад

can not agree more

@joyo2122 2 года назад

your videos are the best

@stepup2me1 2 года назад

You have very good way of explaining the concepts. Thank you!

@rajasdataengineering7585 2 года назад

Thank you Chetan

@rockykefunday2707 Год назад

you are the real raja bro , super

@rajasdataengineering7585 Год назад

Thank you bro

@gulsahtanay2341 4 месяца назад

Thank you for sharing your knowledge with us!

@rajasdataengineering7585 4 месяца назад

My pleasure! Thank you

@kamalbhallachd 3 года назад

Good 👍

@rajasdataengineering7585 3 года назад

Thank you! Cheers!

@abinaya7704 Год назад

Your videos are making wonders!!

@rajasdataengineering7585 Год назад

Thank you

@tanushreenagar3116 4 месяца назад

Nice content sir

@rajasdataengineering7585 4 месяца назад

Thanks!

@rahulpandit9082 2 года назад

I found many videos on RU-vid regarding Cache and Persist, but nobody explain like the way you did...

@rajasdataengineering7585 2 года назад

Thank you Rahul

@turanfair9364 Год назад

Best teacher!!! Thank you sir 🙏🏻

@rajasdataengineering7585 Год назад

Thank you Turan

@kamalbhallachd 3 года назад

Knowledge session

@rajasdataengineering7585 3 года назад

Thanks Kamal

@vutv5742 2 месяца назад

Great explaination 🎉

@rajasdataengineering7585 2 месяца назад

Glad it was helpful! Keep watching

@justvenkyy...3423 Год назад

this is too good . please keep doing. can you post on processing small file problem with spark?

@rajasdataengineering7585 Год назад

Thanks 👍🏻 Sure will post a video for small file problem

@iamkiri_ 8 месяцев назад

Raja, I really appreciate your explanation :)

@rajasdataengineering7585 8 месяцев назад

Glad to hear that! Thanks for your comment

@pankajchikhalwale8769 3 месяца назад

I guess you have at least an M.Tech. + M.Ed. degrees. Expert in Spark and Amazing Teacher. Sir, Tussi Grett Ho !

@rajasdataengineering7585 3 месяца назад

Thank you Pankaj! Hope you like the tutorial

@pankajchikhalwale8769 3 месяца назад

@@rajasdataengineering7585, So far I have watched 9 out of the 22 videos in the "Databricks Performance Optimization" playlist. It is very detailed. Like it.

@rajasdataengineering7585 3 месяца назад

Glad you like it!

@sanjayr3597 9 месяцев назад

Very good playlist which I have come across.. Could you please provide example with practical example because I was watching some videos regarding this and what I noticed was when we df.cache() then by default it is MEMORY_AND_DISK SER ..there was no just MEMORY_AND_DISK it was always SERIALIZED ..need to know the reason on this.

@ranjithajit4717 Год назад

Can you add the examples for creating persist in the description?

@aayushdesai532 Год назад

great video sir! one question - is disc memory same as off heap memory?

@rajasdataengineering7585 Год назад

No, off heap and in disc both are different. Off heap memory is part of RAM. on heap is controlled by jvm while off heap is controlled by os itself

@sravanthiyethapu9970 Год назад

Hi Raja, u said that persist will use both memory and disk. Here memory means both on and off heap memory????

@rajasdataengineering7585 Год назад

By default, it is cached at on-heap memory. But if off-heap memory is enabled and jvm memory(on-heap) is full, off-heap memory would be used for caching remaining partitions

@premsaikarampudi3944 11 месяцев назад

Hi, I was asked to prepare for Spark for my next role in the same company I am working, Is this learning series enough ?

@rajasdataengineering7585 11 месяцев назад

Hi, yes this is more than enough if you complete all these videos

@suresh.suthar.24 Год назад

Best Explanation. but i have 1 question like cache() is a transformation or action ?

@rajasdataengineering7585 Год назад

Cache is an action

@tunyestark2633 3 месяца назад

@@rajasdataengineering7585 No, cache is not an action.It is an transformation, please do try it out.

@Uda_dunga 8 месяцев назад

Try to make videos under 10 mins sir

@rajasdataengineering7585 8 месяцев назад

Sure, will do

@vlogsofsiriii 2 месяца назад

Hi Raja. I have one doubt. Cache - will store the data in memory means is it onheap memory ?? Persist - Will store the data in onheap and off heap both ?? Is it correct ??

@rajasdataengineering7585 2 месяца назад

Yes that's correct. Cache always stores in memory but persist has flexibility of memory or disk

@vlogsofsiriii 2 месяца назад

@@rajasdataengineering7585 memory means here onheap rgt and disk means offheap??

@rajasdataengineering7585 2 месяца назад

No onheap and offheap both are memory and disk is different. I have already posted a video on onheap vs offheap. Pls watch that video

@vlogsofsiriii 2 месяца назад

@@rajasdataengineering7585 thank you 😊