MapDB
sky-benches
MapDB | sky-benches | |
---|---|---|
5 | 7 | |
4,834 | 15 | |
- | - | |
0.0 | 1.8 | |
4 months ago | about 2 years ago | |
Java | Shell | |
Apache License 2.0 | MIT License |
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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
sky-benches
- Skytable NoSQL Database: Even with BlueQL, Skytable Outperforms Redis and KeyDB
- So, you call yourself the fastest key/value store? It's 5X, 10x and 25X faster
- Ask HN: What are the best key-value self-hosted storage engines?
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Skytable: A NoSQL database project in Rust about 10X faster than Redis
UPDATE: I have published some initial benchmarks against KeyDB here: https://github.com/ohsayan/sky-benches. Oddly enough, the bump in the number of queries in KeyDB is similar to that of Skytable. If anyone has suggestions or find something to be anomalous, please open an issue!
What are some alternatives?
Chronicle Map - Replicate your Key Value Store across your network, with consistency, persistance and performance.
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
H2 - H2 is an embeddable RDBMS written in Java.
KeyDB - A Multithreaded Fork of Redis
JetBrains Xodus - Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
dragonfly - A modern replacement for Redis and Memcached
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 ...
Memcached - memcached development tree
Jedis - Redis Java client
oxigraph - SPARQL graph database
Exposed - Kotlin SQL Framework
RocksDB - A library that provides an embeddable, persistent key-value store for fast storage.