LZ4 VS RocksDB

Compare LZ4 vs RocksDB and see what are their differences.


Extremely Fast Compression algorithm (by lz4)


A library that provides an embeddable, persistent key-value store for fast storage. (by facebook)
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LZ4 RocksDB
21 44
9,290 27,536
1.7% 1.2%
9.5 9.8
6 days ago 3 days ago
C C++
GNU General Public License v3.0 or later GNU General Public License v3.0 only
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.


Posts with mentions or reviews of LZ4. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-03-21.
  • Number sizes for LZ77 compression
    1 project | /r/compression | 30 Apr 2023
    LZ4 is a bit more complicated, but seems faster: https://github.com/lz4/lz4/blob/dev/doc/lz4_Block_format.md
  • Rsyncing 20TB locally
    2 projects | /r/zfs | 21 Mar 2023
    According to these https://github.com/lz4/lz4 values you need around ten (10) quite modern cores in parallel to accomplish around 8GB/s.
  • An Intro to Data Compression
    1 project | dev.to | 17 Feb 2023
    The popular NoSQL database Cassandra utilizes a compression algorithm called LZ4 to reduce the footprint of data at rest. LZ4 is characterized by very fast compression speed at the cost of a higher compression ratio. This is a design choice that allows Cassandra to maintain high write throughput while also benefiting from compression in some capacity.
  • Micron Unveils 24GB and 48GB DDR5 Memory Modules | AMD EXPO and Intel XMP 3.0 compatible
    1 project | /r/gadgets | 21 Jan 2023
    Yeah, sure, when you have monster core counts. on regular systems, not so much, here's from their own github page. it achieves, eh, 5GB/s on memory to memory transfers, i.e. best case scenario. so, uh, no? i'm not even sure it's any better than the CPU decompressor one Nvidia used.
  • Cerbios Xbox Bios V2.2.0 BETA Released (1.0 - 1.6)
    2 projects | /r/originalxbox | 31 Dec 2022
  • zstd
    8 projects | news.ycombinator.com | 19 Dec 2022
    > The downside of lz4 is that it can’t be configured to run at higher & slower compression ratios.

    lz4 has some level of configurability? https://github.com/lz4/lz4/blob/v1.9.4/lib/lz4frame.h#L194

    There's also LZ4_HC.

  • Best archival/compression format for whole hard drives
    1 project | /r/DataHoarder | 7 Dec 2022
    Since nobody mentioned it, I'll add lz4 (https://github.com/lz4/lz4).
  • I'm new to this
    2 projects | /r/androidroot | 28 Nov 2022
    Get your bootloader unlocked via Download mode and then obtain your stock firmware, preferably for your current region https://samfw.com (Download mode: CARRIER_CODE). Get the boot image from AP with 7zip, unpack from LZ4 with https://github.com/lz4/lz4/releases (drag and drop), patch with Magisk https://github.com/topjohnwu/magisk/releases/latest, grab the new image, name it "boot.img" and pack it into a .tar with 7zip and flash to AP with odin https://odindownload.com
  • An efficient image format for SDL
    4 projects | /r/gamedev | 28 Sep 2022
    After some investigations and experiments, I found out that it was the PNG compression (well, decompression I should say) that took a while. So I've made some experiments using the LZ4 compression library, which is focused on decompression speed, and it turned out to be an excellent solution!
  • how to root Samsung galaxy note 10 plus 5g(SM-N976B
    1 project | /r/androidroot | 21 Jul 2022
    Root with magisk: whether you use OneUI ≤3 or 4, patch the specific image needed for it (pre 4: boot, after 4: recovery) and flash it to the device. Boot it and enjoy root. https://github.com/lz4/lz4/releases can help extracting it from the AP tarball.


Posts with mentions or reviews of RocksDB. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-02-28.
  • How to choose the right type of database
    15 projects | dev.to | 28 Feb 2024
    RocksDB: A high-performance embedded database optimized for multi-core CPUs and fast storage like SSDs. Its use of a log-structured merge-tree (LSM tree) makes it suitable for applications requiring high throughput and efficient storage, such as streaming data processing.
  • Fast persistent recoverable log and key-value store
    3 projects | news.ycombinator.com | 24 Feb 2024
    [RocksDB](https://rocksdb.org/) isn’t a distributed storage system, fwiw. It’s an embedded KV engine similar to LevelDB, LMDB, or really sqlite (though that’s full SQL, not just KV)
  • The Hallucinated Rows Incident
    2 projects | dev.to | 23 Nov 2023
    To output the top 3 rocks, our engine has to first store all the rocks in some sorted way. To do this, we of course picked RocksDB, an embedded lexicographically sorted key-value store, which acts as the sorting operation's persistent state. In our RocksDB state, the diffs are keyed by the value of weight, and since RocksDB is sorted, our stored diffs are automatically sorted by their weight.
  • In-memory vs. disk-based databases: Why do you need a larger than memory architecture?
    3 projects | dev.to | 5 Sep 2023
    The in-memory version of Memgraph uses Delta storage to support multi-version concurrency control (MVCC). However, for larger-than-memory storage, we decided to use the Optimistic Concurrency Control Protocol (OCC) since we assumed conflicts would rarely happen, and we could make use of RocksDB’s transactions without dealing with the custom layer of complexity like in the case of Delta storage.
  • Local file non relational database with filter by value
    1 project | /r/Database | 17 Jun 2023
    I was looking at https://github.com/facebook/rocksdb/ but it seems to not allow queries by value, as my last requirmenet.
  • Rocksdb over network
    1 project | /r/programming | 20 May 2023
  • How RocksDB Works
    2 projects | news.ycombinator.com | 19 Apr 2023
    Tuning RocksDB well is a very very hard challenge, and one that I am happy to not do day to day anymore. RocksDB is very powerful but it comes with other very sharp edges. Compaction is one of those, and all answers are likely workload dependent.

    If you are worried about write amplification then leveled compactions are sub-optimal. I would try the universal compaction.

    - https://github.com/facebook/rocksdb/wiki/Universal-Compactio...

  • What are the advantages of using Rust to develop KV databases?
    2 projects | /r/rust | 22 Mar 2023
    It's fairly challenging to write a KV database, and takes several years of development to get the balance right between performance and reliability and avoiding data loss. Maybe read through the documentation for RocksDB https://github.com/facebook/rocksdb/wiki/RocksDB-Overview and watch the video on why it was developed and that may give you an impression of what is involved.
  • We’re the Meilisearch team! To celebrate v1.0 of our open-source search engine, Ask us Anything!
    14 projects | /r/rust | 8 Feb 2023
    LMDB is much more sain in the sense that it supports real ACID transactions instead of savepoints for RocksDB. The latter is heavy and consumes a lot more memory for a lot less read throughput. However, RocksDB has a much better parallel and concurrent write story, where you can merge entries with merge functions and therefore write from multiple CPUs.
  • Google's OSS-Fuzz expands fuzz-reward program to $30000
    3 projects | news.ycombinator.com | 2 Feb 2023

    Here are some bugs in JeMalloc:

What are some alternatives?

When comparing LZ4 and RocksDB you can also consider the following projects:

zstd - Zstandard - Fast real-time compression algorithm

LevelDB - LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.

Snappy - A fast compressor/decompressor

LMDB - Read-only mirror of official repo on openldap.org. Issues and pull requests here are ignored. Use OpenLDAP ITS for issues.

brotli - Brotli compression format

SQLite - Unofficial git mirror of SQLite sources (see link for build instructions)

LZMA - (Unofficial) Git mirror of LZMA SDK releases

sled - the champagne of beta embedded databases

ZLib - A massively spiffy yet delicately unobtrusive compression library.

ClickHouse - ClickHouse® is a real-time analytics DBMS

7-Zip-zstd - 7-Zip with support for Brotli, Fast-LZMA2, Lizard, LZ4, LZ5 and Zstandard

TileDB - The Universal Storage Engine