TheCloud/dwarfs
1
0
Fork 0
mirror of https://github.com/mhx/dwarfs.git synced 2025-08-03 09:47:01 -04:00
Code Issues Packages Projects Releases Wiki Activity

doc(README): use slightly more neutral tone in introduction

Browse Source
This commit is contained in:
Marcus Holland-Moritz 2024-04-14 16:53:11 +02:00
parent 5a2a0f515f
commit 1a365d81f5
1 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
README.md
View File

@ -70,11 +70,11 @@ less CPU resources.
To give you an idea of what DwarFS is capable of, here's a quick comparison
of DwarFS and SquashFS on a set of video files with a total size of 39 GiB.
The twist is that each unique video file has two sibling files with a
different set of audio streams (I didn't make this up, this is
[an actual use case](https://github.com/mhx/dwarfs/discussions/63)). So
there's redundancy in both the video and audio data, but as the streams
different set of audio streams (this is
[an actual use case](https://github.com/mhx/dwarfs/discussions/63)).
So there's redundancy in both the video and audio data, but as the streams
are interleaved and identical blocks are typically very far apart, it's
quite challenging to make use of that redundancy for compression. SquashFS
challenging to make use of that redundancy for compression. SquashFS
essentially fails to compress the source data at all, whereas DwarFS is
able to reduce the size by almost a factor of 3, which is close to the
theoretical maximum:
@ -87,10 +87,9 @@ $ ls -lh dwarfs-video-test.*fs
-rw-r--r-- 1 mhx users 39G Jul 12 09:41 dwarfs-video-test.squashfs
```
While this is already impressive, it gets even better. When mounting
the SquashFS image and performing a random-read throughput test using
[fio](https://github.com/axboe/fio/)-3.34, both `squashfuse` and
`squashfuse_ll` top out at around 230 MiB/s:
Furthermore, when mounting the SquashFS image and performing a random-read
throughput test using [fio](https://github.com/axboe/fio/)-3.34, both
`squashfuse` and `squashfuse_ll` top out at around 230 MiB/s:
```
$ fio --readonly --rw=randread --name=randread --bs=64k --direct=1 \
@ -100,7 +99,7 @@ $ fio --readonly --rw=randread --name=randread --bs=64k --direct=1 \
READ: bw=230MiB/s (241MB/s), 230MiB/s-230MiB/s (241MB/s-241MB/s), io=13.5GiB (14.5GB), run=60004-60004msec
```
DwarFS, however, manages to sustain **random read rates of 20 GiB/s**:
In comparison, DwarFS manages to sustain **random read rates of 20 GiB/s**:
```
READ: bw=20.2GiB/s (21.7GB/s), 20.2GiB/s-20.2GiB/s (21.7GB/s-21.7GB/s), io=1212GiB (1301GB), run=60001-60001msec