Use cache-invalidation for questions related to purging content from a cache based on a state change in the cached object or a canonical object that it shadows
When I explicitly set a permission for a user in the database by running a SQL update script, the particular permission with the latest grant is not reflecting in the system. However when I recycle the IIS process or rebuild the solution, it only…
I want to use redis as cache for mysql, and the main idea is:
Query
read from redis
if not exist, read from mysql, and add to redis cache
Add
write to mysql directly
Update&Delete
write to mysql
invalidate the cache of redis
My question is:…
Consider you have two todo list apps for the same service, using the same database - a webapp and a react native app. A user can be logged in to their account on both and create/update/delete their notes from both.
Consider those apps are using…
I have 6 web servers which are giving me problems due to cache inconsistency. I am thinking of building a cache invalidation service such that there is a topic on which all the servers can publish a message to invalidate an object. I am considering…
Let's imagine that we have blog with category A. Category A is currently having 1000 posts on 100 pages. All pages are cached in files (for example, cached by Smarty template engine). I'm adding post and want it to be displayed on first page…
I have this code, that when swapping the order of UsingAs and UsingCast, their performance also swaps.
using System;
using System.Diagnostics;
using System.Linq;
using System.IO;
class Test
{
const int Size = 30000000;
static void Main()
…
I found in varnish book that varnish 3 purge functionality could be somehow achieved in varnish 2.1 by
C{ VRT_Nuke(...); }C
signature of VTR_Nuke seems to be
int VRT_nuke(struct sess *sp, const char *str, ...)
in my default.vcl I want to write…
This is a fairly platform-agnostic question. I know that some platforms allow for shared caching and such, but most of it is kind of just "magic". I'm wondering how they're actually implemented and what are the technical details.
So, if I have a…
I have an application, in Laravel 10, which allows voting for candidates and shows a list of these candidates sorted by votes. That list of candidates is fetched from database, calculated a bit, and saved to Redis cache with a proper tag. (Several…
I have a simple load balancer setup in GCP with two routing rules,
/api/* which redirect requests to the backend service (managed by cloud Run)
/* which redirects all other requests to a static website hosted in a cloud storage bucket, which…
Scenario:
In case we are using asymmetric RSA signatures.
We have an Auth service which exposes a static endpoint which serves the public JWT key.
All other microservices hit that endpoint to get the public key and verify access for a request they…
I'm running Cloudflare in front of a web application, and often need to manually purge the Cloudflare cache after pushing in order to test changes I've made. Since I'm currently using GitHub Actions for my CI/CD pipeline, I could stop doing this…
I have a file named sdk.js. This file name is not versioned or hashed in any way because we don't control the sites where it is embedded so the name must remain consistent.
The browser should cache this file but continually revalidate through…
I am a web developer and working on different websites. Some websites are live (url: http://www.example.com) & some are on staging (url: http://demo.example.com) domain (during development).
When we update styling (in css files) or fixing…
I am using NestJs CacheModule for caching purposes in my application. I want to clear the cache based on a particular key pattern (based on a Regex pattern). I tried to use cacheManager.del(key) but it is not working based on regex expression…
