| # !/bin/sh |
| set -e |
| |
| # Benchmarks run on a Ubuntu 14.04 VM with 2 cores and 4 GiB of RAM. |
| # The VM is running on a Macbook Pro with a 3.1 GHz Intel Core i7 processor and |
| # 16 GB of RAM and an SSD. |
| |
| # silesia is a directory that can be downloaded from |
| # http://mattmahoney.net/dc/silesia.html |
| # ls -l silesia/ |
| # total 203M |
| # -rwxr-xr-x 1 terrelln 9.8M Apr 12 2002 dickens |
| # -rwxr-xr-x 1 terrelln 49M May 31 2002 mozilla |
| # -rwxr-xr-x 1 terrelln 9.6M Mar 20 2003 mr |
| # -rwxr-xr-x 1 terrelln 32M Apr 2 2002 nci |
| # -rwxr-xr-x 1 terrelln 5.9M Jul 4 2002 ooffice |
| # -rwxr-xr-x 1 terrelln 9.7M Apr 11 2002 osdb |
| # -rwxr-xr-x 1 terrelln 6.4M Apr 2 2002 reymont |
| # -rwxr-xr-x 1 terrelln 21M Mar 25 2002 samba |
| # -rwxr-xr-x 1 terrelln 7.0M Mar 24 2002 sao |
| # -rwxr-xr-x 1 terrelln 40M Mar 25 2002 webster |
| # -rwxr-xr-x 1 terrelln 8.1M Apr 4 2002 x-ray |
| # -rwxr-xr-x 1 terrelln 5.1M Nov 30 2000 xml |
| |
| # $HOME is on a ext4 filesystem |
| BENCHMARK_FILE="linux-4.11.6.tar" |
| BENCHMARK_DIR="$HOME/$BENCHMARK_FILE" |
| |
| # Normalize the environment |
| sudo umount /mnt/btrfs 2> /dev/null > /dev/null || true |
| sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs |
| sudo rm -rf /mnt/btrfs/* |
| sync |
| sudo umount /mnt/btrfs |
| sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs |
| |
| # Run the benchmark |
| echo "Copy" |
| time sh -c "sudo cp -r $BENCHMARK_DIR /mnt/btrfs/$BENCHMARK_FILE && sync" |
| |
| echo "Approximate tarred compression ratio" |
| printf "%d / %d\n" \ |
| $(df /mnt/btrfs --output=used -B 1 | tail -n 1) \ |
| $(sudo du /mnt/btrfs -b -d 0 | tr '\t' '\n' | head -n 1); |
| |
| # Unmount and remount to avoid any caching |
| sudo umount /mnt/btrfs |
| sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs |
| |
| echo "Extract" |
| time sh -c "sudo tar -C /mnt/btrfs -xf /mnt/btrfs/$BENCHMARK_FILE && sync" |
| |
| # Remove the tarball, leaving only the extracted data |
| sudo rm /mnt/btrfs/$BENCHMARK_FILE |
| # Unmount and remount to avoid any caching |
| sudo umount /mnt/btrfs |
| sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs |
| |
| echo "Approximate extracted compression ratio" |
| printf "%d / %d\n" \ |
| $(df /mnt/btrfs --output=used -B 1 | tail -n 1) \ |
| $(sudo du /mnt/btrfs -b -d 0 | tr '\t' '\n' | head -n 1); |
| |
| echo "Read" |
| time sudo tar -c /mnt/btrfs 2> /dev/null | wc -c > /dev/null |
| |
| sudo rm -rf /mnt/btrfs/* |
| sudo umount /mnt/btrfs |
| |
| # Run for each of -o compress-force={none, lzo, zlib, zstd} 5 times and take the |
| # min time and ratio. |
| |
| # none |
| # copy: 0.981 s |
| # extract: 5.501 s |
| # read: 8.807 s |
| # tarball ratio: 0.97 |
| # extracted ratio: 0.78 |
| |
| # lzo |
| # copy: 1.631 s |
| # extract: 8.458 s |
| # read: 8.585 s |
| # tarball ratio: 2.06 |
| # extracted ratio: 1.38 |
| |
| # zlib |
| # copy: 7.750 s |
| # extract: 21.544 s |
| # read: 11.744 s |
| # tarball ratio : 3.40 |
| # extracted ratio: 1.86 |
| |
| # zstd 1 |
| # copy: 2.579 s |
| # extract: 11.479 s |
| # read: 9.389 s |
| # tarball ratio : 3.57 |
| # extracted ratio: 1.85 |