Concurrent Requests and Unique Keys on Web Applications

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In this video I explain how primary key cannot be duplicated even if concurrent transactions are executed in the same time.
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Опубликовано:

30 июн 2024

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Комментарии : 26

@anonymous.youtuber 4 года назад

As usual, a superb explanation!

@anthonyfarias321 4 года назад

This is very good stuff man.

@dominicwong5647 3 года назад

Great stuff Hussein, love your videos

@javedutube10 3 года назад

As Always, love your explanation.

@arunsatyarth9097 4 года назад

Thanks for your videos Hussein. Really beneficial and love your presentation style...

@hnasr 4 года назад

arun satyarth thanks Arun!! ❤️ glad you like the content

@sachinkalkur 3 года назад

These short videos are extremely informative.

@hnasr 3 года назад

Glad to hear that!

@IBITZEE 4 года назад

nice thinking... nice tests... CCC thx !

@AAZinvicto 4 года назад

Thank you bro for such informative videos. Love from India. Ma-as-salama

@hnasr 4 года назад

AAZinvicto much love to all my subs from India 🇮🇳❤️

@ahmedkhudhair8035 4 года назад

Very nice ❤️

@arpitpandey8797 4 года назад

You reminded of me Dora the explorer 😅... Great video

@6Sambora 4 года назад

Was about to ask you to do the same with MongoDB until the end of the video, when you mention NoSQL does not have isolation level haha

@hnasr 4 года назад

Kid Amador we can do some of things of not all of it. 😊 MongoDB is a different beast with different set of features

@simon66668 3 года назад

At the document level, MongoDB already supports ACID transactions

@ramonberrutti 4 года назад

Nice explain, you just forgot the deadlock case, inserting in a different order in each transaction

@hnasr 4 года назад

Nice idea for another video forgot to mention it! Thanks 🙏

@8Trails50 3 года назад

Sorry can you expand, what do you mean by this?

@adarshupadhyay8265 2 года назад

But how you were able to see the insert result without Commit operation in the beginning?

@MrDecorative 3 года назад

If the database is replicated, and the leader is processing a write with id 1 , and then crashes for some reason before those changes has been yet replicated to the follower which is elected to be the new leader , this new leader wouldn’t be aware of the key 1 which already exists , and after a while when the system gets eventual consistency, boom 💥 a problem in the system. This bug happened at github in 2011 with auto incrementing key 🔐