MapDB
Redis
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| MapDB | Redis | |
|---|---|---|
| 5 | 318 | |
| 4,829 | 64,705 | |
| - | 1.9% | |
| 0.0 | 9.7 | |
| 4 months ago | 6 days ago | |
| Java | C | |
| Apache License 2.0 | GNU General Public License v3.0 or later |
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.
MapDB
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GC, hands off my data!
I decided to start with an overview of what open-source options are currently available. When it comes to the implementation of the on-heap cache mechanism, the options are numerous – there is well known: guava, ehcache, caffeine and many other solutions. However, when I began researching cache mechanisms offering the possibility of storing data outside GC control, I found out that there are very few solutions left. Out of the popular ones, only Terracotta is supported. It seems that this is a very niche solution and we do not have many options to choose from. In terms of less-known projects, I came across Chronicle-Map, MapDB and OHC. I chose the last one because it was created as part of the Cassandra project, which I had some experience with and was curious about how this component worked:
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Permazen: Language-natural persistence to KV stores
So, it's an object database, like Zope's ZODB on Python?
I like the idea, but I'd like to learn about use cases for it.
Otherwise, in Java, MapDB is about as far as I'd be willing to go: https://github.com/jankotek/mapdb/
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what is the best persistent collection library?
Anyway, without further ado, I found MapDB (https://github.com/jankotek/mapdb) which does exactly that. Of course, they also provide their own Java collection implementations as well, so I suspect using it with Vavr would be a poor idea, but it is very cool in its own right anyway. Of course, there is also Apache Derby and HSQLDB, and those great options with a long history as well. I haven't played with these in a while though, so I might give them a try again soon for some personal stuff.
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Ask HN: What are the best key-value self-hosted storage engines?
In Java I like
https://mapdb.org/
It is more feature rich than you want but in Python I'd probably just use sqlite3 since it is in the standard library.
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Solution for hash-map with >100M values
I have had good results with mapdb
Redis
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Valkey Is Rapidly Overtaking Redis
One of the challenges Redis labs here have is that there's very little reason for their userbase to stay loyal to them.
antirez retired from Redis development a few years ago.
From https://github.com/redis/redis/graphs/contributors it looks like activity since he left has been mostly from people who didn't overlap with him much.
Redis Labs have not shown themselves to be outstanding stewards of the project as far as I can tell. Why shouldn't people support the fork?
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Handling Multiple requests with Redis and Bullmq
Redis
- Redis is not "open core" (2021)
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Software Engineering Workflow
Redis - real time data storage with different data structures in a cache
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Redict 7.3.0, a copyleft fork of Redis, is now available
[0] https://github.com/redis/redis/blob/unstable/CONTRIBUTING.md
- It has been ten days since the last commit was pushed to Redis
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Containerize your multi-services app with docker compose
Cache: a Redis cache
- Fix Redis Drama
- Redis changes license from BSD-3 to dual RSALv2+SSPLv1
- Change license from BSD-3 to dual RSALv2+SSPLv1
What are some alternatives?
Chronicle Map - Replicate your Key Value Store across your network, with consistency, persistance and performance.
Redis - 🚀 A robust, performance-focused, and full-featured Redis client for Node.js.
H2 - H2 is an embeddable RDBMS written in Java.
LevelDB - LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.
JetBrains Xodus - Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
RabbitMQ - Open source RabbitMQ: core server and tier 1 (built-in) plugins
Redisson - Redisson - Easy Redis Java client and Real-Time Data Platform. Sync/Async/RxJava/Reactive API. Over 50 Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Spring Cache, Tomcat, Scheduler, JCache API, Hibernate, RPC, local cache ...
Polly - Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner. From version 6.0.1, Polly targets .NET Standard 1.1 and 2.0+.
Jedis - Redis Java client
celery - Distributed Task Queue (development branch)
Exposed - Kotlin SQL Framework
Riak - Riak is a decentralized datastore from Basho Technologies.