Intro to Replication - Systems Design 'Need to Knows' | Systems Design 0 to 1 with Ex-Google SWE

Replication applies in real life too - I used to completely rely emotionally on one girlfriend, but I've since learned my lesson that now I need 5.

Thanks for one year Gigachads. A lot of you are working hard and I can see it paying off.

[sourcerer]

Systems Design 2.0 is so much better than the first attempt! Thank you so much!

[rakeshvarma]

Thanks for the video.
In the video, for WAL you were saying that we will store the disk address & and the content (0x0aff : "Jordan"). How will it be useful for replication on other DB replica server ?

What's the difference between WAL & Replication log ? Do they represent same statements ?

[hazemabdelalim]

I have a question related to replication, How replication will work in case if the data is in memory? If you have a server that has a data structure like TRIE for example and you want some other servers to run and server with the same version of this TRIE ? What is the best way of doing that ? I am assuming that it might be the case they serialize the data in memory to a file and then replicate it ? I didn't find many sources about how this is actually done .

[Anonymous-ymst]

Thanks for the structured videos, they are super helpful! I have a n00b question about WAL. Kind of irrelevant to replication, but the mentioning of WAL here reminds me of my question. I learnt from your video WAL could be used to help with durability, as if something crash, it can help with rebuild. But what happen if the crash happened when I write into the WAL? I need a WAL of WAL?

[shobhitarya]

Does nosql databases use same mechanism i.e using WAL or Logical replication log to replicate data to other nodes OR it is just applicable to sql databases?

[ovsepavakian]

Never heard of replication between different types of database management software. Is it a Postgres feature, or you can replicate any db to any other db?

[xiaoborao]

hi bro, i have a question about the database, there are some different types databases, and have some features like consistency or high availability, how these databases are used for the replication, thanks