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65. Databricks | Pyspark | Delta Lake: Vacuum Command 

Raja's Data Engineering
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Azure Databricks Learning: Delta Lake - Vacuum Command
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What is Vacuum Command in delta table and how to apply in delta lake development?
Vacuum is one of the performance optimization techinique used in delta lake. It removes obsolete files from delta table folder
This video talks more about vacuum command
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3 июл 2024

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Комментарии : 51   
@ashutoshjadhav6922
@ashutoshjadhav6922 Год назад
Beautifully Explained As Always👌🏼
@rajasdataengineering7585
@rajasdataengineering7585 Год назад
Thanks a lot 😊
@oiwelder
@oiwelder Год назад
Very valuable information. Thanks for sharing. 👏👏👏
@rajasdataengineering7585
@rajasdataengineering7585 Год назад
Thanks Welder!
@ranjansrivastava9256
@ranjansrivastava9256 6 месяцев назад
Well Explained Raja . Keep it up the good work !!
@rajasdataengineering7585
@rajasdataengineering7585 6 месяцев назад
Thank you Ranjan!
@krishj8011
@krishj8011 26 дней назад
Great Tutorial
@rajasdataengineering7585
@rajasdataengineering7585 26 дней назад
Glad you think so! Thanks
@tanushreenagar3116
@tanushreenagar3116 11 месяцев назад
SUPERB SIR VERY WELL EXPLAINED
@rajasdataengineering7585
@rajasdataengineering7585 11 месяцев назад
Thanks for your comment. Glad to know it helps you gaining knowledge in databricks concepts
@AlessanderJunior
@AlessanderJunior Год назад
Great Video thanks
@rajasdataengineering7585
@rajasdataengineering7585 Год назад
Glad you enjoyed it
@tobitikare4152
@tobitikare4152 9 дней назад
Hi Raja! Thanks for this video! You are very good at explaining the way the delta table works. One comment though is that you didn't mention in this video or make it clear that a new data file and a new log file is created when you delete a record.
@rajasdataengineering7585
@rajasdataengineering7585 9 дней назад
Thanks for your comment! Keep watching
@sravankumar1767
@sravankumar1767 2 года назад
Nice explanation Raja 👌 👍 👏
@rajasdataengineering7585
@rajasdataengineering7585 2 года назад
Thanks Sravan.
@rajunaik8803
@rajunaik8803 11 месяцев назад
Hi Raja, neat and clean explanation as always. Quick questions please 1. In real time projects, how frequently we will delete/vacuum the invalid files? 2. In your case, you have one record per one file. But let's say I am inserting some 100's of records in one single transaction and it has created some 4 files (file1, file2, file3 and file4). Now, if I delete some records those are present on file1, how it will handle and make the file1 as invalid it in backend since it also has other records which are not marked as delete?
@raghvendrapratapsingh7909
@raghvendrapratapsingh7909 Год назад
how to change column sequence(reordering) in delta table...but condition is that i want to use only spark sql not dataframe API please help
@SurajKumarPrasad-dc9mu
@SurajKumarPrasad-dc9mu 8 месяцев назад
Hii Raja, I am following the same command in my workspace but at last not deleted the files. What problem could have in my case...
@prateekagrawal-mv9bi
@prateekagrawal-mv9bi 7 месяцев назад
Best
@rajasdataengineering7585
@rajasdataengineering7585 7 месяцев назад
Thanks Prateek!
@krishnamurthy9720
@krishnamurthy9720 2 года назад
Nice one Raja.. And if I want vaccum the files using the path dynamically instead of table how can i do that
@rajasdataengineering7585
@rajasdataengineering7585 2 года назад
Thanks Krishna Murthy. It's not recommended to delete directly on the path as it would not update log files, which would lead to corrupted delta table
@AshokKumar-ji3cs
@AshokKumar-ji3cs 11 месяцев назад
Nine explaination. Appreciate your efforts. I can see your not making videos from make 2 weeks
@rajasdataengineering7585
@rajasdataengineering7585 11 месяцев назад
Thanks! Yes due to tight schedule, couldn't make any videos in last 2 week. Will create videos soon and upload
@AshokKumar-ji3cs
@AshokKumar-ji3cs 11 месяцев назад
@@rajasdataengineering7585 thanks for for quick response. We all will be waiting for your beautiful content videos as usual. Take care.
@rajasdataengineering7585
@rajasdataengineering7585 11 месяцев назад
Thanks
@gaurangiagrawal
@gaurangiagrawal 4 месяца назад
How to provide days when using vaccum , if we want 10 days and not 7
@rajubyakod8462
@rajubyakod8462 2 года назад
What happens when a single file have number of records among them one record deleted..did this file is marked as inactive or active
@rajasdataengineering7585
@rajasdataengineering7585 2 года назад
Good question. In this case, new file will be created by deleting this particular record and that new file will be updated as active file in delta log file. At the same time, the older file will also be marked as inactive in delta log file
@venkatasai4293
@venkatasai4293 2 года назад
Is there any configuration to change log files also ?and what is the default retention period for log files ?
@rajasdataengineering7585
@rajasdataengineering7585 2 года назад
By default, invalid log files would be retained for 30 days and will be removed automatically after that. This property can be configured using delta.logRetentionDuration
@venkatasai4293
@venkatasai4293 2 года назад
@@rajasdataengineering7585 thanks😊
@venkatasai4293
@venkatasai4293 2 года назад
@@rajasdataengineering7585 once this threshold is reached all log files which are not related to current version are going to be deleted right ?
@rajasdataengineering7585
@rajasdataengineering7585 2 года назад
Yes that's right
@pavankumarveesam8412
@pavankumarveesam8412 7 месяцев назад
Hi raj, by default how many data files are created without using optimize command,.Will that be one record is created as one file or is it goin to be random.
@rajasdataengineering7585
@rajasdataengineering7585 7 месяцев назад
Many files are getting created based on each operation. There is no default value
@pavankumarveesam8412
@pavankumarveesam8412 7 месяцев назад
@@rajasdataengineering7585 yeah like if we use insert operation ending with a semi colon it is creating a single file. So if we don't use any semi colon at insert it will insert randomly . That's what I'm assuming for now
@ravikanthranjith
@ravikanthranjith Год назад
Thank you Raja, Can you also suggest how to manage the same scenario on external Tables??
@sumitchandwani9970
@sumitchandwani9970 11 месяцев назад
i was searching ans for the same
@rajasdataengineering7585
@rajasdataengineering7585 11 месяцев назад
Vacuum command is applicable for both internal and external tables
@rajasdataengineering7585
@rajasdataengineering7585 11 месяцев назад
Vacuum command is applicable for both internal and external tables
@sumitchandwani9970
@sumitchandwani9970 11 месяцев назад
@@rajasdataengineering7585 Great! I thought as dropping external table doesn't delete the actual table optimize command will also not be able to delete the actual small files in external table
@rajasdataengineering7585
@rajasdataengineering7585 11 месяцев назад
There is a difference between vacuum command and drop command. Drop command will remove only the metadata while keeping the actual data for external tables. Vacuum command is used to delete the list of files which are not used in the latest version of table
@abhishek310195
@abhishek310195 Год назад
Suppose we have run the vacuum command and it has deleted 7 days old data files, so in that case how will time travel work after that? Will that work?
@abhishek310195
@abhishek310195 Год назад
?????
@rajasdataengineering7585
@rajasdataengineering7585 Год назад
@@abhishek310195 once Vaccum command deleted the old data files, time travel is not possible for those deleted versions
@karanarora13
@karanarora13 Месяц назад
what about history now after running vacuum command
@rajasdataengineering7585
@rajasdataengineering7585 Месяц назад
History will be deleted after vacuum command
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