Chronicle Map
Replicate your Key Value Store across your network, with consistency, persistance and performance. (by OpenHFT)
Jedis
Redis Java client (by redis)
Our great sponsors
| Chronicle Map | Jedis | |
|---|---|---|
| 4 | 4 | |
| 2,684 | 11,605 | |
| 0.7% | 0.8% | |
| 8.4 | 9.1 | |
| 7 days ago | 8 days ago | |
| Java | Java | |
| Apache License 2.0 | MIT License |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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.
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.
Chronicle Map
Posts with mentions or reviews of Chronicle Map.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-10-27.
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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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Off-heap memory in Java
Chronicle-Map: Chronicle Map is an in-memory, key-value store, designed for low-latency, and/or multi-process applications.
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Solution for hash-map with >100M values
I've wrangled data sets in the ~600gb range using nothing but plain old Java and a few beefy boxes. This can all be kept in memory, but you have to go off-heap. You can use Chronicle Map and Chronicle Values to model this data and work with it off-heap in a way that's still very clean and object oriented. 128gb of RAM is cheap these days, whether you're in the cloud or not.
Jedis
Posts with mentions or reviews of Jedis.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-02-02.
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Lessons learned from picking a Java based driver for Amazon ElastiCache for Redis - Part 1
Finding out what's causing that was not that simple as Jedis does not write a lot of log information when the log level is set to debug. From what we could tell from the Jedis source code it seems that when the Jedis client connects to the configuration endpoint it fetches all known hosts. It stores that in a local cache and figures out the primary node from the set of nodes. Once the primary node is known it will execute operations against the primary node. It does so by connecting to the Amazon-generated domain name/entry and when that entry is down / unreachable it seems it does not use the configuration endpoint to rediscover the nodes or fetch the new cluster topology. We initially thought this had to do with the DNS caching of the JVM, so we also tried to disable caching, but we did not see any effect after that change.
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Removies
jedis is used to interact with Redis.
- Stop using noargsconstructors and setters (and builders)
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Uma abordagem diferenciada à Sessões de Usuário em Microsserviços usando Redis
Como um bônus, deixo aqui uma classe SessionManager pra ajudar na implementação em Java usando Jedis e o gerador de token do Tomcat, que já é normalmente incluído no Spring Boot:
What are some alternatives?
When comparing Chronicle Map and Jedis you can also consider the following projects:
MapDB - MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
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 ...
HikariCP - 光 HikariCP・A solid, high-performance, JDBC connection pool at last.
JetBrains Xodus - Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
H2 - H2 is an embeddable RDBMS written in Java.
EVCache - A distributed in-memory data store for the cloud
Speedment - Speedment is a Stream ORM Java Toolkit and Runtime
jOOQ - jOOQ is the best way to write SQL in Java