Caching API Responses with Redis

[@MeonisRP]

So in my E-commerce shop it takes 1,5 sec to load some heavy pages, with Redis it’s just 0,1 sec. My boss today was speechless :D

[@Redisinc]

Love it! Glad we could be a part of that success!

[@antoniopavicevac-ortiz8886]

I love clear, concise and a adroit presentation of how to do something!

[@pcraov1223]

Nice and clear. Much simplified explanation and demonstration about Redis Cache. Thanks Justin.

[@Redisinc]

Glad it was helpful! Let me know what other content you'd like us to cover :) - Justin

[@Reecepbcups]

Thank you! This was amazing. As someone just learning JS & already a lover of Redis, learned a lot here

[@Redisinc]

That's so great to hear! Make sure to check out Guy Royse's livestreams as well, he writes everything in JS and is always entertaining. You should also check out our Redis University course integrating Redis with JS here: university.redis.com/courses/ru102js/ Best of luck! - Justin

[@deveshb793]

Loved the way you explained Justin, thank you!

[@Redisinc]

My pleasure! - J

[@cappuccinopapi3038]

Now this is developer advocacy!

[@4F2E4A2E]

I just love this guy and content! Thank you!

[@Redisinc]

Aww thanks, buddy! Love ya too! - Justin

[@sebastiansanta2792]

Redis is great! I learned it quick and made a small web app with it the same day. Super easy to learn and so useful

[@Redisinc]

That's awesome, Sebastian! You should check out our discord (discord.gg/redis) and share your progress! - Justin

[@ipxify]

watched this video , learn 10 things more than just cache

[@phil5293]

Great video. I had a problem at first with 'process.env.WEATHER_API_KEY'. I ended up viewing other KZbin videos to figure out that I needed to set up a system environment variable. I am new to NodeJS

[@Redisinc]

Thanks, Phil! I should have added a comment in the code to explain that better. I'll add that now. Welcome to the wild, wacky world of Node.js! - Justin

[@SakosTechSpot]

bay area represent! thanks for the video!

[@rajeshkhadka225]

Here we are caching data locally into the machine, but when the app goes for deployment where does the cache stored ??

[@privymassage3458]

Exactly. Today I tried SISMEMBER with redis enterprise cloud the response is only a 1 / 0 the time it took was between 78ms and 14ms. That's time added to my api response. So imagine something more heavy 🤔

[@Redisinc]

@@privymassage3458 you'd want to run your code as close as possible to the database to minimize round trip latency. Using Redis Cloud you can choose between AWS, Azure and GCP and pick the same or closest region to where you run your applications to achieve this.

[@rafaelfu624]

Awesome!

[@sujezz]

Wouldn't t1 get the date before you get data ? Shouldn't you use it in .then() or .finally() ?

[@jameslewis5604]

Have you done something to expand on this demonstrating what you would do with redis if the app has multiple instances?

[@Redisinc]

With Redis in the cloud, all of the applications would hit the same Redis instance. The first time an app instance hits a query and saves the result in the cache, other subsequent instances would check the Redis cloud and use that result until the TTL deletes that cache entry. Did that answer your question? - Justin

[@jameslewis5604]

Justin. Lets take your great weather app as an example. Lets imagine we get update messages from our weather client telling us that the weather has changed rather than the 1hr TTL you did in the app and we want to pre warm the cache based on that message. Lets also imagine we want to be highly available so we have 2 instances of our weather app running in 2 different data centers. When both apps receive the update message from the weather center how do we stop contention in Redis? @@Redisinc

[@seyyedkhandon]

How can we store json in redis cluster using ioredis without json-stringify/parse?

[@gabrielvillela2738]

Justin Castilla Love the video! but need help with one part of the tutorial. Do you do zoom meeting by any chance?

[@Redisinc]

Glad you enjoyed the video! We don't really do zoom meetings, but you can join our discord channel at discord.gg/redis and we should be able to assist. - Justin

[@rayfananda3083]

it's mind blowing

[@Redisinc]

🤯

[@alexi_space]

I got this error after importing ioredis : This dependency was not found: * dns in ./node_modules/ioredis/built/cluster/ClusterOptions.js To install it, you can run: npm install --save dns

[@SP-yh5op]

Can we do partial updating if cache is a json string. Also does cache supports other data types like List JSON apart from string

[@Redisinc]

Check out the JSON data type in Redis Stack which allows for atomic in place updates of JSON data in Redis redis.io/docs/stack/json/

[@martg0]

why using axios and not only fetch directly? thanks!

[@Redisinc]

I like axios! - Justin

[@martg0]

@@Redisinc ok! I was wondering because it adds weight to the bundle size, and we recently took this import out replacing it with native fetch.

[@vasurangpariya8492]

During setting and getting key into redis we need to JSON parse and stringify the large object and that creates performance issue so how to overcome with that issue

[@Redisinc]

You can set/get JSON directly into Redis without having to serialize it into a String! Check it out here: redis.io/docs/stack/json/

[@varunkulkarni9765]

can we cache external api calls from django server

[@Redisinc]

absolutely!

[@m12652]

Thank you…

[@Entertainment_Zone2522]

How can MySQL update data in real time in redis cache?

[@socat9311]

how is your redis docker config? are you using docker desktop? i try to do this but does not seem the redis instance is visible outside the container, trying to figure out how docker desktop does the mapping basically

[@Redisinc]

This is the command I use to start up a Redis-Stack image with RedisInsight. It exposes the Redis default port (6379) and the browser access to Redis Insight (8001): docker run -d --name redis-stack -p 6379:6379 -p 8001:8001 redis/redis-stack:latest Here's our page on the different configurations. Hope this helps! - Justin

[@socat9311]

@@Redisinc thanks!

[@thatguycodes]

saved me

[@cloccawoerc]

could you share the repo in this example?

[@Redisinc]

Here you go! github.com/redis-developer/redis-caching-api-responses

[@christellelemaire9749]

Accord pas soucis confiance