Questions tagged [redis]

Redis is an open-source, networked, in-memory, key-value data store.

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18 views

Scalability of azure redis example

I built an auction site with a dynamic caching layer after I seeing how expensive a dbaas is. The site is now done, but like any site that grows, my caching solution grew too. The cache currently ...
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23 views

Profiling redis RTT in go

I'm trying to determine best case round-trip times to a redis server. Particularly, I am trying to determine exactly how low I can get the latency on a local instance. On a technical level, this is ...
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26 views

Memoization of slow URL get requests

Purpose of this small module is to allow memoization of slow URL get requests. I intend to send many of these to download a bunch of files from internal (rather slow, old) website. Some requests may ...
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1answer
1k views

Dependency Injected StackExchange.Redis Client

I am currently building cache for my application, and I would like to have my redis cache client work the same way you would dependency inject a DbContext. I am using StackExchange.Redis to manage my ...
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136 views

Cache most expensive data using Redis Cache in an ASP.NET Core project

Overview I have developed a small ASP.NET Core 3.0 Web API that provides information that is rarely changed (several times a day), but often read (~ 10 K / day). Although the traffic is quite small, ...
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0answers
216 views

Docker-compose for task-based Flask API with Redis and rq

I am not a Docker guru or expert in Flask or Redis. However, I need to leverage these technologies. I managed to cobble something together that works and would like to submit it for review. The MWE ...
2
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1answer
85 views

Redis work queue processor

I frequently encounter the need for creating services that concurrently process messages from Redis queues. So I decided to share the knowledge I learned and help others easily bootstrap such a ...
2
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0answers
514 views

Singleton pattern for Redis connection

Recently I have learned about singleton design pattern. I have tried to implement Redis connection following singleton design pattern. conn/redis.go ...
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2answers
7k views

Accessing a subset of keys from a nested dictionary in Python

I am trying to access data from Coinmarketcap API in Python and came up with the following code: ...
4
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1answer
65 views

Fetching and storing new reddit posts

I've created a small tool that fetches and stores the newest self-posts from a specific subreddit. The posts are stored in a redis store. I'm going to write another couple of applications at a future ...
3
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1answer
253 views

One minute cron Python script reads from MySQL and updates Redis based on calculations

The following code works and will be put into cron on a AWS server (not sure what specifications, cores, kernels etc) at a every 1 minute frequency. However, it's my first time putting a script into ...
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1answer
669 views

Write millions of lines to a file - Python, Dataframes and Redis [closed]

I have the following code snippet that reads a CSV into a dataframe, and writes out key-values pairs to a file in a Redis protocol-compliant fashion, i.e. ...
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1answer
62 views

Web scraper extracts zip files and publishes them to redis

I wrote this program for a job interview a while back. I would like general feedback on style, readability, maintainability, or any obvious flaws: ...
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0answers
114 views

Fetch key from MySQL DB if doesn't exist in redis DB

This code gets data from a MySQL database, such that if a key doesn't exist in a Redis database, then fetching of data needs to be done from the MySQL database and then stored in Redis cache. As such, ...
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0answers
219 views

Redis lua - game leaderboard “overview”

Here is the code I invoke as Lua script in Redis. I use Redis sorted set to store game scores. This function is used to get some kind of overview of leaderboard. It returns id, score and rank of: ...
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1answer
700 views

GET and POST with Flask - optimum performance

I have this code to POST and save a digest to redis, and retrieve it from redis on a GET. This uses Python and Flask, of course. ...
3
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1answer
404 views

Redis lookup with a default value

I have some code to perform a redis lookup, but if the key to look up either doesn't exist or there's an issue connecting to Redis at all, it will use a default value. The logic currently looks like ...
7
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1answer
206 views

Python Flask webserver with small features

With the latest of my projects, I started using Visual Studio Code, which allows for Python linting and also checking for poor practices, such as using over 100 characters in a single line. As you ...
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1answer
101 views

List User Online Status

I'm using Rails with MongoDB for database. In my apps I have 1 action for displaying list of users. User has name, image, ...
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1answer
1k views

Spring Data Redis - mapping object relationships?

I'm designing an app that will process a set of social media messages which are posted by users. Each message is then scored and there is a reporting layer that will spit out a set of reports. The app ...
2
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1answer
394 views

Redis lock implementation

Considering I'm not implementing distributed lock mechanism, is this code correct and clear? ...
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1answer
876 views

Redis protocol implementation by Kotlin

I have created my first project on the github. It is Redis client protocol implementation (request-responce part only). I would like to make my sources more Kotlin style. Please, check my sources and ...
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1answer
143 views

Game Data Client: Go based Game server

In my previous question I asked how could the Redis client be improved. Here I will ask how can the Game data Client can be improved. Game Data client sits on top of Redis Client and uses datatypes ...
2
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1answer
173 views

Redis Client: Go based Game server

Here is my Go code to interact with a Redis server ...
4
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1answer
59 views

GET event handler

I'm working on my first NodeJS / Express application with the async module. It's been an uphill battle for me learning node (and even JavaScript) as I go along so I'm sure there's a lot of room for ...
4
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0answers
390 views

2-tier c# cache

I have slightly altered Marc Gravells 2-tier cache code which can be seen here. I changed it to use Stackexchange.Redis instead of Booksleeve and also added some retry logic and serialization. ...
2
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1answer
662 views

Depersonalisation via redis cache

In an Azure Function, I have a c# program that processes tab delimited data into JSON entries. I'd like to improve it in terms of performance and the connection management. I want to remove personal ...
4
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1answer
371 views

Server setup script for Redis, HAProxy and Node.js

I wrote a pretty basic setup script that handles most of the setup for a Three-server solution. The solution and setup file are available on GitHub The three servers are Redis, HAProxy and Node / ...
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2answers
375 views

Small C++ thread pool

I've made a small thread pool that i'll be using to communicate with a Redis server: ...
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1answer
2k views

Singleton method for Redis connection in Python

Here's my class for providing a singleton instance of a Redis connection. What do you think? ...
2
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1answer
744 views

NodeJS script to dump data from Redis to Elasticsearch

I have about a million records in Redis which I want to dump into Elasticsearch periodically. I just want to make sure that my script is decent enough in terms of speed and no memory leaks. ...
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2answers
275 views

Silly redis implementation

This is a silly Redis implementation that handles only three commands: INFO, ECHO, PING. The implementation is based on streams: ...
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1answer
56 views

Store and output hard-coded relationships among hosts

The following code has begun to smell, but I have not yet decided with what to replace it, other than, obviously, a database. I made a very unsatisfactory workaround for my attempt to make ...
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0answers
964 views

JavaScript to connect to Redis using Singleton

I'm trying to create a class to connect to Redis in Express. I don't think my code is good enough as I got variable db hanging out. ...
3
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3answers
108 views

Preventing floods while saving logs

I had a logging function… ...
6
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1answer
287 views

Tornado chat with SockJS and Redis

I have Tornado chat with export to Redis. Other scripts will export messages from Redis to MongoDB in the time. It works, but how is it written? ...
3
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1answer
835 views

API to verify whether a Redis entry exists

I come from a PHP object oriented framework background (Laravel, Symfony, Silex...). With that, validation comes in pre-built classes mechanism in a framework that validates for you parameters that ...
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0answers
1k views

Node.js and Redis based chat application

I have been worked on creating a chat tool similar to vk.com. Right now I have done a simple chat which requires only authentication via a PHP website and everyone can chat with each other. I used the ...
4
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1answer
10k views

Redis Object storage and conversion

I am stepping into a new realm with this project, Reflection. I have written some working code (below) that will potentially store POCO objects in a redis cache (and eventually backed by Table or ...
7
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2answers
610 views

Sum-based sliding rate limiting with Redis and Lua

As I'm new to Redis, I would like to get a review / improvement suggestions from Redis / Lua experts on the following problem and the solution I have found so far. Problem The context is: an e-...
4
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0answers
78 views

Token generating library on Redis

This is a token generating library for Go that runs on top of Redis. I'm using it as part of a larger projects. The library needs to be able to generate and validate tokens and return the associated ...
7
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2answers
4k views

Redis Message Queue (Cloud)

I am in the process of writing a Cloud application (mostly hobby, learning) that required a very quick cache, queue, and messaging system. I have looked at a few different options from Microsoft (...
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0answers
280 views

Optimizing redis cache

I am new to Express so I'd like to clear my code. This is Express with Redis support. I am getting someId and then I am searching it on Redis or using scraper which ...
4
votes
1answer
88 views

Game boot to some operations every second

I am building game, like Ogame, or Ikariam where you can play with other users in real-time. You train some soldiers, and build some vehicles or buildings. Every building or vehicle has some level. If ...
3
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1answer
8k views

Cached-object Store c# with Redis client for persistent storage

I have written a Cached-Object store with a Redis Client for persistent storage. The application that is going to use this is a heavy read application with the occasional write. I assume that entire ...
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0answers
234 views

Semaphore with Node and Redis

I'm learning Node and Redis and created a semaphore for master/slaves. ...
3
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1answer
7k views

Spring oauth2 token store supported by redis

I had to make a demo for Spring oauth2 with redis store for tokens. Started with the sparklr2 (with tonr2) sample app from here. They are demo apps to show oauth2 powered by spring. Sparklr is the ...
3
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1answer
4k views

Redis Cache Data source code - Retrieve/Set/Invalidate actions

This is my RedisDataSource code. What I am mainly interested in is how the retry policy could be improved and if using WindowsAzure Trainsient Fault Handling this case (using Redis Azure Cache) makes ...
7
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1answer
8k views

Async distributed locking with StackExchange.Redis [closed]

I have been trying to write an analogy to this approach to distributed locking with two differences: making it asynchronous making it work with StackExchange.Redis rather than AppFabric Cache. My ...
3
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1answer
511 views

Reducing lock contention for a caching utility, or make it totally lockless but threadsafe

My Java program is a module called configProxy which fetches configuration entries from a remote node (say from a Redis instance). When the caller calls the ...