Memcached
KeyDB
| Memcached | KeyDB | |
|---|---|---|
| 56 | 24 | |
| 13,236 | 10,806 | |
| 0.9% | 9.1% | |
| 8.4 | 8.4 | |
| 3 days ago | about 1 month ago | |
| C | C++ | |
| BSD 3-clause "New" or "Revised" License | BSD 3-clause "New" or "Revised" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Memcached
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System Design: Databases and DBMS
Memcached
- Redis Re-Implemented with SQLite
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Best engineering interview question I've gotten
> Multiple clients racing can't be fixed.
Really? You can't think of a single way for multiple clients to operate on the same data without racing? (Here's a hint if you're still having trouble: https://github.com/memcached/memcached/wiki/Commands#cas.)
- Memcached 1.6.25 Release Notes
- Memcached 1.6.24 Release Notes
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How to choose the right type of database
Memcached: A simple, open-source, distributed memory object caching system primarily used for caching strings. Best suited for lightweight, non-persistent caching needs.
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Sieve is simpler than LRU
Oh, thank you! I didn't realize that LRU Maintainer Thread was more than an expiration reaper. When it was first being introduced that was its first responsibility as lazy expiration removal by size eviction meant dead entries wasted capacity. It was all work in progress when I had read about it [1] and talked to dormando, so it got fuzzy. The compat code [2, 3] might have also thrown me off if I only looked at the setting and not the usage. Its a neat variant to all of these ideas.
[1] https://github.com/memcached/memcached/pull/97
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A Developer's Journal: Simplifying the Twelve-Factor App
stores session state in a session store like Memcached or Redis.
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In-memory database Redis wants to dabble in disk
memcached has recently gained the ability to spill to disk: https://github.com/memcached/memcached/wiki/Extstore
we recently implemented this to grow our caches to >50TB
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Django Caching 101: Understanding the Basics and Beyond
Django supports using Memcached as a cache backend. Memcached is a high-performance, distributed memory caching system that can be used to store cached data across multiple servers.
KeyDB
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Redict 7.3.0, a copyleft fork of Redis, is now available
Three. KeyDB forked before the recent shake-up.
https://github.com/Snapchat/KeyDB
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KeyDB: A Multithreaded Fork of Redis
Can you explain what lead you to believe it's dead?
Looking at the Issues in their Github, a couple of days ago they mentioned to be working on some features in a branch.
https://github.com/Snapchat/KeyDB/issues/798#issuecomment-20...
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Redict is an independent, copyleft fork of Redis
https://github.com/Snapchat/KeyDB
KeyDB is an existing fork that’s well supported and has a solid community for those interested. It takes a different philosophy to Redis but can be a drop in replacement in many cases
- KeyDB – A Multithreaded Fork of Redis
- Redis License Changed
- [BUG] Address is used after it has been freed (dict).
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The first version of Redis, written in Tcl
To me it's still not clear if 6.3.x is stable (https://github.com/Snapchat/KeyDB/issues/494) and performant (https://github.com/Snapchat/KeyDB/issues/470).
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Migrating from Redis to KeyDB
I posted about KeyDB, a multi-threaded fork of Redis, here already a while ago. We still use it in some cases and find it beneficial.
- Snapchat/KeyDB: A Multithreaded Fork of Redis
What are some alternatives?
Varnish - The project homepage
dragonfly - A modern replacement for Redis and Memcached
node-cache - A simple in-memory cache for nodejs
keydb-operator - A KeyDB (Drop-In Alternative to Redis) Operator for Kubernetes, based on Ansible Operator SDK.
SSDB - SSDB - A fast NoSQL database, an alternative to Redis
node-cache - a node internal (in-memory) caching module
mini-redis - Incomplete Redis client and server implementation using Tokio - for learning purposes only
Redis - Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs, Bitmaps.
tikv - Distributed transactional key-value database, originally created to complement TiDB
skytable - Skytable is a modern scalable NoSQL database with BlueQL, designed for performance, scalability and flexibility. Skytable gives you spaces, models, data types, complex collections and more to build powerful experiences