The Secret Sauce Behind NoSQL: LSM Tree

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Covering topics and trends in large-scale system design, from the authors of the best-selling System Design Interview series.

[Kxneki]

IMPORTANT: Don't forget the Memtable is stored in memory, so if the system crashes, that data will be lost. To avoid losing data, we can maintain a separate log file on disk. Every time we write to the Memtable, we'll also append that write to the log file (no need to sort it as we just use it to restore after a crash). Then once the Memtable contents get written out to a SSTable file, we can erase the log file. That way the log helps us avoid losing writes stuck in memory when a crash happens.

[JoelBrubaker]

This is the perfect amount of depth and overview I’m looking for. Great videos and visuals!!

[sealuke]

Bruh, this is just awesome... keep going

[phong]

This guy is better than my teamlead in term of explaining a concept on NoSQL, thank you, make my day

[bhomiktakhar]

Saw this video after reading chapter 3 of "Designing data intensive application".
Understood the whole concept of nosql data write and indexing.
Greatful of this channel as always.

[maxil]

That's the best system design content I have ever seen on youtube ! This channel is absolutely amazing. It must be tough to squeeze all that valuable knowledge into less than a 10 minutes video. Keep up the excellent work!

[bazoo]

This is the most information-dense video on what's so special about NoSQL databases I ever saw. Not a word was superfluous, but the key concepts were clearly transmitted.

[danielgospodinow]

I can't recall the last time I stumbled upon such great material! Fascinating work!

[mr_nature]

I appreciate your efforts. Thanks for making system design more palatable than ever.

[nishantgoel]

One of the concise video to understand how elastic/lucene is using these things to fast write and read.
Great work man!

[rafaelacioly]

This channel is by far the best channel that I've found on yt about tech

[AminAramoon]

These videos are superb man, keep up the good work

[bardhan.abhirup]

These videos are incredible! Very well paced and presented!

[BRBearUSA]

VERY informative without going into too much complexity. THANKS and congrats for a great video. I'm an MS SQL Server DBA, and the high level explanation you provided was awesome. Thanks again. Best, R.

[CppExpedition]

LOVE THE DARK BACKGROUND! :D:D:D:D (Also the video of course!!)

[arthursoares]

The dark mode was awesome. I think it could be the default from now on

[susingh]

I never experienced such a communicative video with such a simple and easy explanation.. Thanks Alex ..Please keep it up and upload more such videos. I have anyway bought both volume of System Design Book. Thank you so much !!!

[richsadowsky]

Really awesome overview of how SQL and NoSQL differ. Agree with Joel below me just the right level of detail to provide value.

[frederickbarbarossa]

besides bloom filter, a sparse index is to help find a key quickly so we only look into a small number of sstables

[doxologist]

Perhaps the best educational systems content on the whole of YouTube right now. Great stuff