DwarFS: A fast high compression read-only file system

Re:DwarFS: A fast high compression read-only file system by bufferoverflow on Sunday November 29, 2020 @07:12PM (#25249400)

I don't know about you guys, but most of the stuff that takes up space on my drives are:

1) Videos from my DSLR

2) RAW images from my DSLR

3) Various movies / TV series I downloaded

4) Game files (most of which are textures and 3D models)

None of that stuff is really compressible.

[ Parent | on HN ]

Re:DwarFS: A fast high compression read-only file system by jandrese on Sunday November 29, 2020 @08:45PM (#25249959)

The RAWs aren't compressible? Are they LZ encoded on the camera?

[ Parent | on HN ]

Re:DwarFS: A fast high compression read-only file system by kortex on Sunday November 29, 2020 @09:50PM (#25250300)

RAW imagery I have worked with is about 25-50% losslessly compressible on average. Most of your gains in image compression are from quantizing the gamut in clever, (usually) imperceptible ways.

Raw imagery contains a lot of entropy that usually doesn't affect the appearance perceptually, but still has sig figs that frustrate compression.

[ Parent | on HN ]

Re:DwarFS: A fast high compression read-only file system by spaetzleesser on Sunday November 29, 2020 @10:56PM (#25250586)

My Fuji has lossless RAW compression and as far as I know quite a few others too.

[ Parent | on HN ]

Re:DwarFS: A fast high compression read-only file system by bufferoverflow on Sunday November 29, 2020 @10:43PM (#25250515)

I just tried compressing one with 7-zip ultra level compression. Saved maybe 5%. Wouldn't get even that with realtime compression.

[ Parent | on HN ]