Re: Force re-compression with lz4

On 10/18/21 01:07, Michael Paquier wrote:
> CPU-speaking, LZ4 is*much* faster than pglz when it comes to
> compression or decompression with its default options. The
> compression ratio is comparable between both, still LZ4 compresses in
> average less than PGLZ.
> --
> Michael

LZ4 works much better with deduplication tools like Data Domain or Data
Domain Boost (client side deduplication). With zip or gzip compression,
deduplication ratios are much lower than with LZ4. Most of the modern
backup tools (DD, Veeam, Rubrik, Commvault) support deduplication. LZ4
algorithm uses less CPU than zip, gzip or bzip2 and works much better
with deduplication algorithms employed by the backup tools. This is
actually a very big and positive change.

Disclosure:

I used to work for Commvault as a senior PS engineer. Commvault was the
first tool on the market to combine LZ4 and deduplication.

Regards

--
Mladen Gogala
Database Consultant
Tel: (347) 321-1217
https://dbwhisperer.wordpress.com