Questions tagged [redis]
Redis is an open-source, networked, in-memory, key-value data store.
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Fetch the nearest city, optimised with Redis on a Lambda
I have a lambda function which returns the nearest city from a latitude and longitude.
My algorithm for this is resource heavy and time consuming. To optimise this, I hash the coordinates into a 6 ...
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Python and redis. Make queries more efficient
My Python code (part of a Django site) queries data from a redis database and loads it into a Pandas dataframe. I'm new to redis, and I think I'm not using the redis library as efficiently as I could.
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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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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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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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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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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 ...
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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 ...
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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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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:
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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 ...
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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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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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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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131
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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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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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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.
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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 ...
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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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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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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 ...
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Redis lock implementation
Considering I'm not implementing distributed lock mechanism, is this code correct and clear?
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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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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 ...
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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 ...
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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.
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726
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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 ...
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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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444
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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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Singleton method for Redis connection in Python
Here's my class for providing a singleton instance of a Redis connection. What do you think?
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857
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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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279
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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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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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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.
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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?
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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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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 ...
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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 ...
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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-...
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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 ...
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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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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 ...
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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 ...
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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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Semaphore with Node and Redis
I'm learning Node and Redis and created a semaphore for master/slaves.
...
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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 ...
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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 ...
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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 ...
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