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Redis vs RocksDB: What are the differences?
Developers describe Redis as "An in-memory database that persists on disk". Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets. On the other hand, RocksDB is detailed as "Embeddable persistent key-value store for fast storage, developed and maintained by Facebook Database Engineering Team". RocksDB is an embeddable persistent key-value store for fast storage. RocksDB can also be the foundation for a client-server database but our current focus is on embedded workloads. RocksDB builds on LevelDB to be scalable to run on servers with many CPU cores, to efficiently use fast storage, to support IO-bound, in-memory and write-once workloads, and to be flexible to allow for innovation.
Redis belongs to "In-Memory Databases" category of the tech stack, while RocksDB can be primarily classified under "Databases".
"Performance" is the primary reason why developers consider Redis over the competitors, whereas "Very fast" was stated as the key factor in picking RocksDB.
Redis and RocksDB are both open source tools. Redis with 37.4K GitHub stars and 14.4K forks on GitHub appears to be more popular than RocksDB with 14.3K GitHub stars and 3.12K GitHub forks.
According to the StackShare community, Redis has a broader approval, being mentioned in 3261 company stacks & 1782 developers stacks; compared to RocksDB, which is listed in 6 company stacks and 7 developer stacks.
Pros of Redis
- Performance884
- Super fast541
- Ease of use512
- In-memory cache443
- Advanced key-value cache323
- Open source193
- Easy to deploy182
- Stable164
- Free155
- Fast121
- High-Performance42
- High Availability40
- Data Structures34
- Very Scalable32
- Replication24
- Pub/Sub22
- Great community22
- "NoSQL" key-value data store19
- Hashes15
- Sets13
- Sorted Sets11
- Lists10
- BSD licensed9
- NoSQL9
- Integrates super easy with Sidekiq for Rails background8
- Async replication8
- Bitmaps8
- Open Source7
- Keys with a limited time-to-live7
- Lua scripting6
- Strings6
- Awesomeness for Free5
- Hyperloglogs5
- Written in ANSI C4
- LRU eviction of keys4
- Networked4
- Outstanding performance4
- Runs server side LUA4
- Transactions4
- Feature Rich4
- Performance & ease of use3
- Data structure server3
- Object [key/value] size each 500 MB2
- Simple2
- Scalable2
- Temporarily kept on disk2
- Dont save data if no subscribers are found2
- Automatic failover2
- Easy to use2
- Existing Laravel Integration2
- Channels concept2
Pros of RocksDB
- Very fast5
- Made by Facebook3
- Consistent performance2
- Ability to add logic to the database layer where needed1
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Cons of Redis
- Cannot query objects directly15
- No secondary indexes for non-numeric data types3
- No WAL1
Cons of RocksDB
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What is Redis?
What is RocksDB?
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