# File Compression

**URL:** <https://forum.kx.com/t/file-compression/10180>\
**Category:** Community Support\
**Tags:** kdb-and-q\
**Created:** [July 24, 2015, 9:43pm UTC](https://forum.kx.com/t/file-compression/10180 "2015-07-24T21:43:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sieber\_m1](https://avatars.discourse-cdn.com/v4/letter/s/d78d45/32.png) [@sieber\_m1](https://forum.kx.com/u/sieber_m1)\
**Post date:** [July 24, 2015, 9:43pm UTC](https://forum.kx.com/t/file-compression/10180/1 "2015-07-24T21:43:00Z")

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Hi,

I would like to use lz4 as file compression instead of gzip as it is much faster [1].

Is there any way to use it with KDB+ (with -19! and .z.zd)? &nbsp;Unfortunately I can

not use filesystem compression (zfs would support lz4).

I tried gzip and kdb-ipc compression, but the first one is too slow for reading and

the second doesnt achive good ratios.

Markus

[1] [http://catchchallenger.first-world.info//wiki/Quick\_Benchmark:\_Gzip\_vs\_Bzip2\_vs\_LZMA\_vs\_XZ\_vs\_LZ4\_vs\_LZO](http://catchchallenger.first-world.info//wiki/Quick%5C_Benchmark:%5C_Gzip%5C_vs%5C_Bzip2%5C_vs%5C_LZMA%5C_vs%5C_XZ%5C_vs%5C_LZ4%5C_vs%5C_LZO)