New File Browser UI is listing incorrect file sizes #69455

New Issue

Jesse Yurkovich · 2019-09-03T20:55:06+02:00

Jesse Yurkovich commented

2019-09-03 20:55:06 +02:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: Quadro 600/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 369.09

Blender Version
Broken: version: 2.81 (sub 5), branch: master, hash: 9e3cd98529
Worked: (optional)

Short description of error
It looks like the file sizes are incorrect -- is the mega byte calculation actually being done?

Take these 2 files for example (size listed in bytes):

07/30/2019  04:52 PM        70,220,480 perf-test.blend
03/18/2019  12:41 AM        31,345,332 Sample_Pack.blend

These should be ~66.9 MB and ~29.8 MB respectively but blender has other ideas:

Exact steps for others to reproduce the error

View a set of files in the new file browser and check their sizes with how big they actually are

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: Quadro 600/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 369.09 **Blender Version** Broken: version: 2.81 (sub 5), branch: master, hash: 9e3cd98529 Worked: (optional) **Short description of error** It looks like the file sizes are incorrect -- is the mega byte calculation actually being done? Take these 2 files for example (size listed in bytes): ``` 07/30/2019 04:52 PM 70,220,480 perf-test.blend 03/18/2019 12:41 AM 31,345,332 Sample_Pack.blend ``` These _should_ be ~66.9 MB and ~29.8 MB respectively but blender has other ideas: ![wrong-size.png](https://archive.blender.org/developer/F7715533/wrong-size.png) **Exact steps for others to reproduce the error** - View a set of files in the new file browser and check their sizes with how big they actually are

Jesse Yurkovich commented

2019-09-03 20:55:06 +02:00

Added subscriber: @deadpin

Harley Acheson commented

2019-09-03 21:27:46 +02:00

Added subscriber: @Harley

Harley Acheson commented

2019-09-03 21:27:46 +02:00

The central issue is that the various platforms are not in agreement with how to show abbreviated file sizes. The terms many of us use, like "megabyte", has always been ambiguous in whether it is in base2 or base10. So on each platform the users have a different idea of what a "megabyte" is.

Not that is matters. What is important is that what we show matches what the user expects, so we should vary by platform.

First, I think we need a nice tooltip when you hover over the file size. It should show the sizes in base2, base10, and the number of bytes.

For what to show in the file list:

Windows: base2 number with "MB" abbreviation
Mac: base10 number with "MB" abbreviation
Linux: base2 number with "MiB" abbreviation

The central issue is that the various platforms are not in agreement with how to show abbreviated file sizes. The terms many of us use, like "megabyte", has always been ambiguous in whether it is in base2 or base10. So on each platform the users have a different idea of what a "megabyte" is. Not that is matters. What is important is that what we show matches what the user expects, so we should vary by platform. First, I think we need a nice tooltip when you hover over the file size. It should show the sizes in base2, base10, and the number of bytes. For what to show in the file list: - Windows: base2 number with "MB" abbreviation - Mac: base10 number with "MB" abbreviation - Linux: base2 number with "MiB" abbreviation

Julian Eisel commented

2019-09-03 21:32:07 +02:00

Added subscriber: @JulianEisel

Julian Eisel commented

2019-09-03 21:32:07 +02:00

This actually works like designed, the units are now base 10, rather than base 2.

The issue is that the units KB, MB, etc are ambiguous in fact. They don't specify if numbers are calculated base 10, or base 2. To solve this ambiguity, the units KiB, MiB, etc were introduced for base 2, and the International System of Units (SI) defines MB to be base 10. We follow that definition.
MacOS and Gnome file manager show base 10 too, KDE's Dolphin seems to have it optional, but follows the SI definition.
Windows appears to be the only platform not following the SI definition, showing KB, MB, etc for base 2.

(From the chat I know this has already been figured out, just mentioning here for others seeing this.)

This actually works like designed, the units are now base 10, rather than base 2. The issue is that the units KB, MB, etc are ambiguous in fact. They don't specify if numbers are calculated base 10, or base 2. To solve this ambiguity, the units KiB, MiB, etc were introduced for base 2, and the International System of Units (SI) defines MB to be base 10. We follow that definition. MacOS and Gnome file manager show base 10 too, KDE's Dolphin seems to have it optional, but follows the SI definition. Windows appears to be the only platform not following the SI definition, showing *KB*, *MB*, etc for base 2. (From the chat I know this has already been figured out, just mentioning here for others seeing this.)

William Reynish commented

2019-09-03 22:08:06 +02:00

Added subscriber: @WilliamReynish