Redis Caching in Node.js

[@morenokv]

My fiance left me about a month ago during the hardest time of my life. I let myself be sad for a day then decided I want to work on my purpose which is to become a front-end developer. So far I bought your HTML and CSS course which is phenomenal. Once done going to buy your JavaScript then react course. Thank you so much, you courses have helped through this dark time and I know there is a light at the end of the tunnel!

[@TraversyMedia]

morenokv sorry to hear that friend. Im glad i could help give you something to get your mind off it 😉

[@Frazer227]

Im so sorry man, but these things can happen. I hope you get through all right. Just remember, there are still people out there that love you. By the way, (At the moment) there are plenty of fish in the sea (not if we keep global warming up though) and you'll find the perfect match one day! I hope you make it through!

[@GameMasters825]

Bro theres a lot of people out there dont stay dow, i bougth all courses of Brad, i told you worth it, but after all courses you need make your own projects, wich you will really learn code, dont miss your faith

[@suyasrivastv]

there are lot of people who dont have a fiance so cheer up

[@zuzukouzina-original]

I think you should be thankful to her. She saved you from wasting you with miserable time. You’re unchained now come on dude. There are plenty women out there, but don’t look for Kardashians kind of women, but hard working women who knows the value of life.

[@UnknownEntity606]

All these years later, this video still stands as a simple introduction to redis. It's instructive and straight to the point. Thanks for the quality content.

[@rgonzy2124]

thanks, I'm hesitant to watch it and saw that the date is 4yrs ago. but I saw this reply and watch it anyway.

[@pavlovicjosip]

Yesterday i was like thinking "hmm how should i implement cache in node.js?" and of course when i get home from the work, you uploaded this video. Thank you Brad, you are the best ! :)

[@charliebewsey6872]

Just bought your udemy course after watching a couple of your free videos - I've been really impressed with you as a teacher, I hope that the money you get from doing this stuff justifies the time you must spend doing this! It's a real pleasure to support you, I'm sure I'll be buying your javascript course next!

[@srcmake]

Amazing video as usual, Brad. Your example server was concise and showed exactly what was needed to demo redis. And honestly, I didn't think to use middleware to check for the cached result and end the response early. That's a 200 IQ play. (I probably would have put the cache check in the same endpoint right before making the fetch call, which is clearly suboptimal.) Thanks for the video! I really learned quite a bit, and I've interviewed with some big companies that do use Redis so it is an important skill.

[@sam_mitschiro]

As someone who uses redis in production, both as a queue and cache, i can confirm that redis is powerful.

[@colonizatorgg5960]

hey, can you give your github?

[@freddyhaug9379]

This is such a well done video, you can watch in in 2x speed and complete understand everything. Someone can watch this and become a fullstack developer in 7 minutes

[@yitzchaksviridyuk932]

Went through 3 of your Redis videos today. Crash course, user management app, and just finished this video. Gotta say it's helped a lot. I keep saying this, but thanks again for the video!

[@zvuk]

This is not a video that i need, but still ... i let it play, and give it a like and comment this just to support you. This channel deserves it. I do not do such things on any other channel.

[@markmansur9268]

I was literally wondering how to do EXACTLY this a few days ago for my mobile app backend. Thanks again Brad!

[@codicts5149]

Hope you still there. I just want to say thank you! you've inspired me to create my own channel.

[@sam-jm1vb]

got my sub!

[@TraversyMedia]

Awesome...keep at it

[@TraversyMedia]

Love the beats. Real hip hop, not that trap stuff

[@codicts5149]

@@TraversyMedia Thanks for replying. I definitely will!

[@MrGreenpaulo]

@@TraversyMedia if you like those beats Brad you might like this - kzbin.info/www/bejne/o6KndaeBZquErJY

[@Melvin420x12]

I come from your videos out 2017 and wow the change in videoquality is insane! You've made huge progress

[@maagu-_-]

I cannot thank you enough for these courses/lessons. You are a phenomenal teacher, Brad! These KZbin lessons led me to your Udemy courses which I'm happily buying. Keep it up 😀

[@alibarznji2000]

You're a big help, anytime I want to learn something new, you come to the rescue. Thanks

[@codesmart9044]

perfect timing with perfect to the point clear cut explanation ... if you are not in youtube maybe i never doing software development. thanks man... great help from you as always.

[@vaibhavnadgonde4397]

Always pleasure watching your videos. thx again brad

[@tomosterlund6497]

Thank you Sir! Always thought that caching was something really tricky, until now. Managed to push down waiting time on a few of my slowest requests with ~40-50%, in production, in the project I'm working on right now :)

[@klarnorbert]

It's tricky, if you write a library yourself. Js community is so big, there's a solution for everything.

[@Mar2431]

Thanks again Brad for this quick course on Redis Caching. I've just recently finished your Udemy course React Front To Back 2019 it was perfect! You provide great learning resources and tutorials to this community of web developers. Thank you!!!

[@KanaanBahmaniBuilds]

Thank you Brad you always upload things that people need the most, with the best timing. Thank you my man, you're a great man.

[@johnnycakez2750]

Currently working through the express section of your react front to back course, this is a neat little bonus. I don't know how you do it but your timing is always perfect!

[@sharad_1992]

Thanks for the quick overview of redis. I like the network part in the video. It really defines the benefits of redis cache.

[@ecommerceuk]

Excellent tutorial. Concise and totally aligns with the title. Strangely, 7 people have hit the thumb down. Is there another country where thumb down means good? No other obvious explanation.

[@CoryTheSimmons]

Really great tutorial. Short, simple, explained the concept well enough to get me really interested in learning more.

[@Battery64121]

Excellent video. You have a good way of breaking technologies into simple practical parts that I can immediately see using in the real world. I thought getting started with Redis would be so much more complicated!

[@josedejesuslopezdiaz]

tu eres uno de esos canales de programacion de los que veo publicidad a proposito por que me gusta tu contenido. talves no entiendes lo que te digo pero te lo queria decir.

[@alvin_lal]

This is the perfect example for a redis beginner

[@dev-qq2vy]

Redis becomes very easy to understand with your presentation. Thanks.

[@saranshmamtakhetarpaul6798]

Thank you so much for giving a much clearer picture of Redis :)

[@haroldcrane1595]

You read my mind!! Just started learning redis yesterday. thanks bro!

[@TraversyMedia]

Line 6 should be process.env.REDIS_PORT .........Brain fart 😊

[@Ambass001]

You are amazing Brad 💪

[@Luxcium]

and what about line 15 hardcoding the 5000🤨 but line 16 using ${PORT}🧐 ... ??? 🤣😜 too much brain farts lead to code smell 🤭🙊💩

[@royhonders]

You should pin this

[@dilsmatchanov]

also why the fuck did you declare the port variable if you listen on 5000 port anyway?

[@arpee1337]

@@dilsmatchanov Nothing works better than dropping a "fuck" inside a question to create empathy and show you're a great person 👍🏼

[@PrashanthPuranik]

Thanks Brad for the great intro to using Redis with Node. I noticed small typo at 5:28 - it should have been something like process.env.REDIS_PORT || 6379 and not process.env.PORT || 6379. Wanted to document here as a comment for welfare of anyone setting up a PORT environment variable only and wondering why the script wouldn't run. EDIT ------- Also app.listen( PORT, ... ) would be required.

[@AmitYadav-el5wg]

Awesome tutorial, i think one of the best tutorial on redis in node. Thank you 😊

[@indiansoftwareengineer4899]

Thanks, I loved your channel. but I haven't finished with the video, but before that I gave like and then started.

[@augustinekanyi]

aah Mr Brad! nice to watch your videos in the afternoon!

[@yonatandawit8112]

Comprehensive and neat tutorial 👏

[@causecaos]

Awesome stuff, I have always kept away from Redis but this is something else. Thanks, Brad

[@jorkhachatryan317]

Hello Brad, you are my hero-instructor, because you always creating very useful content at right time(for me). Will be great to see Kubernetes course. Thank you very much you're the best!!!!

[@nandinaulfaldy9132]

Thanks your course and everything is always helping me, can't wait to buy your next course

[@khalidelgazzar]

Superb tutorial. Short & sweet. Thank you!

[@zuhrulanam5971]

Woahhh. Thanks for this gold tutorial, very clear and understand

[@sleeptil3]

FYI if you're getting the node-fetch ES Module error its because newer node-fetch only supports import. You can either downgrade node-fetch to 2.6.1 to use require() or add "type": "module" to the package.json and use 'import' (for everything) instead of 'require'

[@ShivaKumar-st9ps]

You may not needed node-fetch anymore. In the latest version of Node.js (18.0.0), global fetch (experimental) is enabled by default.

[@JKaromo]

Much love from Kenya.... Love your content.

[@bwanamaina]

👌🖒

[@smsibasish]

Exactly what I was looking for. Thanks brad :)

[@hroland]

Was just watching your 2017 tutorial when I spotted you uploaded an updated one! :) Much appreciated!

[@surajdutta5730]

Awesome tutorial. Just what I wanted to learn today 👏

[@NicoAntoniw]

Hey brad, could you make a video about a node.js headless cms ??

[@TraversyMedia]

Yes definitely at some point

[@ashiqsultanmohamed9765]

Please make one, a tutorial on Strapi will be great.

[@talalnajam8692]

I can't believe how you make programming look so simple and understandable. Excellent video as always :)

[@HackerWulf]

Love this tutorial. Easily explained! Thank you.

[@usmankhan-tm2iw]

Thanks. You made redis so easy.

[@SuperJAIMISH]

Simple and concise! Great tutorial.

[@gabrielobafisile2299]

Thanks Brad. You rock the dev

[@umamaheshmeka1032]

Nice one brad, thanks for making it look so easy. by the way I had to do `redis-server` first and then `redis-cli` in my Mac Mojave.

[@locksfamily]

Timely as hell dude. Thanks!

[@tingtingzhou9508]

Such a useful video! looking forward to more!

[@atmospheric_b]

Yes! Thats one exactly what i needed! Thanks Brad!

[@AdarshMadrecha]

Thanks for such awesome videos. It helps a lot.

[@larissarosa5863]

As always, a greate video! Thank you very much! I was able to apply pretty much everything with Python. Awesome.

[@andrejtacigin697]

hey Brad, quite often the job applications look for AWS/S3 knowledge. I tried looking for your tutorials on it, but couldn't find anything. Hoping you can make one when you catch the time. thank you!

[@bodolawale5448]

Awesome video brad

[@arunprabu7476]

Very neat & nice tutorial, This is what exactly i was looking for... :-)

[@viniciusse1]

Dude, awesome video. Congrats.

[@mosesegboh]

Hello I am getting the error: err happenedTypeError: client.setex is not a function

[@dolevdo]

as well

[@Александр-н4н9ъ]

Спасибо большое вам, очень помогли, все понятно и быстро!) Thank you :)

[@subratarudra2745]

Nice explanation🔥

[@pankaj_9998]

As always very useful. Thanks

[@happinin]

could you please give us a video explaining how redis is used with socket.io and node.js to make websockets more efficient and scalable, and how this process is done? would really appreciate it. also what are the disadvantages to running socket.io naked without redis?

[@ChhaihongSRUN]

Hey Brad! Please, make more videos about Redis.

[@aniketfadia7328]

Thank you for this video! Keep going, mate! :)

[@sasg87962]

Thank you, that was easy to understand .. thanks again

[@rounaksengupta1920]

Nice video to learn in depth

[@kavindesivalli]

Great Video... I have a doubt. what if the number of repositories of the user has changed?

[@josesanchezquintana7720]

Thank you, I would try enhance my project in NOSQL with your videos

[@marccawood]

You reload attempts around 13:00 resulted in 304 response status so you’re hitting a cache.

[@lukehero]

Would love to see something like multiple user sessions with this.

[@Ghaleon]

Hi ! What font do you use? it's rounded and so nice to my eyes

[@mayur9876]

What if the repo number changed it will still display the cached value. What is the way around ?

[@oussemaessafi9754]

i think redis will delete the cache every 3600 seconds

[@AbdullahAyoola]

Because I'm on windows, I had to follow the docs for the installation. Also I created a redis config file in my code where I imported the redis package and instantiated it using the createClient passing in the port from the env variable. And then exported the client variable that has been assigned to the createClient for reuse in other places in my code. But it doesn't work for me

[@yashtibrewal4259]

Informative, Thank you. Just one question, I like your speed to code while you are explaining, so how many years of coding experience do you have (non-industry and industry)?

[@alaindimabuyo]

love this kind of new stuff

[@Qwerter1410]

Great video!

[@MERNStack]

yes it seems so useful and fast up the site

[@eugenevedensky6071]

Interesting! So this is coaching implemented on an api layer using redis. Now, is it viable to implement a similar strategy using local/session storage in the client if user data remains relatively unchanged throughout the day?

[@Geomaverick124]

I think i may implement Redis in one of my portfolio projects once they are finished. Would you suggest Redis for CRUD apps or Fullstack apps or just for client websites...When do you think adding Redis can become over kill?

[@nidhishetty1225]

Thank you so much for sharing your knowledge:-)

[@neenus]

Brad as always very informative easy to understand tutorial .... my one question to you and is definitely off topic... but I love how your browser new tab starts with this customized page and I've created something similar to it but couldn't figure out how to customize my chrome browser to start with it would you mind sharing how you did it! it seems like you're using Chrome browser if it is how did you customize the new tab to start like that I couldn't find anything in the settings that lets new tab start with a customized page?? thank you!!

[@sachin__ak]

what happens if the count of repo changes? will it return the same cache value or will it return the updated value?

[@desi-musk]

super helpful.. thanks brad

[@BhaskarSivaraj]

Its very helpful. Thank you

[@Frazer227]

Hey, have you ever thought about using Java, C# (.NET or like ASP.NET) or C++ for web development before, and/or making a youtube vid/udemy course on one? If not, I would be thrilled for you to make a course on one of them... EDIT: Maybe even like Go (Google main language), I'd just like to see you (and I) go out of your comfort zone and make some different than usual content, and maybe even help some people dealing with these languages -Long time watcher/lurker, first time commenter

[@vittoriodeluca5233]

Awesome video Brad. What about making a NginX or varnish video?

[@emreozgun3846]

hey this is probably a stupid question but what about the cost of calling that cache() function and setting that redis cache ? vs optimizing network requests ? can someone explain the tradeoff ? or is there even a tradeoff in the first place..

[@elyu_vibes]

How can I return the data or store in a variable instead of returning as response?

[@xenizs9112]

the cache is only in memory? what if you need to access that data across different servers?

[@divyagowda836]

Hey Brad, one question on redis is which all calls we should usually cache. I'm building a LMS and planning to use redis so is it good idea to cache all api calls or just courses related api? Any insight is very much helpful.

[@AniltonNeto]

Why do you've port as variable if you never use it?

[@hashamalam3936]

Good question, although he didn't use it to listen for listening to http socket, he did use it when he console.log() the port

[@mjjply]

@@hashamalam3936 lol i thought that was weird too!

[@ShivaKumar-st9ps]

return Promise.reject(new errors_1.ClientClosedError()); ^ ClientClosedError: The client is closed This error comes when i reach upto caching....12:00 help please

[@promiseihunna4714]

Did you find a solution to this? Same thing is happening to me as I type.

[@subratarudra2745]

Instead of this: const client = redis.createClient(REDIS_PORT); Use this: const client = redis.createClient({ legacyMode: true, PORT: REDIS_PORT, });

[@vibrancydevelopers.9420]

@@promiseihunna4714 use client.connect()

[@ВладимирГолубь-э6ы]

Does the package redis for node create database or just client for it ?

[@MaziSaidSo]

What if the value changes, how would know and update the cache accordingly

[@yuvrajagarkar8942]

so do we deploy this as normal nodejs app ? or has some extra steps?

[@bicanmarianvaleriu5400]

Based on your experience for server caching a node app, do you recommend lru-cache or this method ?