105 lines
2.6 KiB
Bash
105 lines
2.6 KiB
Bash
# !/bin/sh
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set -e
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# Benchmarks run on a Ubuntu 14.04 VM with 2 cores and 4 GiB of RAM.
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# The VM is running on a Macbook Pro with a 3.1 GHz Intel Core i7 processor and
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# 16 GB of RAM and an SSD.
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# silesia is a directory that can be downloaded from
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# http://mattmahoney.net/dc/silesia.html
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# ls -l silesia/
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# total 203M
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# -rwxr-xr-x 1 terrelln 9.8M Apr 12 2002 dickens
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# -rwxr-xr-x 1 terrelln 49M May 31 2002 mozilla
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# -rwxr-xr-x 1 terrelln 9.6M Mar 20 2003 mr
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# -rwxr-xr-x 1 terrelln 32M Apr 2 2002 nci
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# -rwxr-xr-x 1 terrelln 5.9M Jul 4 2002 ooffice
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# -rwxr-xr-x 1 terrelln 9.7M Apr 11 2002 osdb
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# -rwxr-xr-x 1 terrelln 6.4M Apr 2 2002 reymont
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# -rwxr-xr-x 1 terrelln 21M Mar 25 2002 samba
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# -rwxr-xr-x 1 terrelln 7.0M Mar 24 2002 sao
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# -rwxr-xr-x 1 terrelln 40M Mar 25 2002 webster
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# -rwxr-xr-x 1 terrelln 8.1M Apr 4 2002 x-ray
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# -rwxr-xr-x 1 terrelln 5.1M Nov 30 2000 xml
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# $HOME is on a ext4 filesystem
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BENCHMARK_DIR="$HOME/silesia/"
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N=10
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# Normalize the environment
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sudo umount /mnt/btrfs 2> /dev/null > /dev/null || true
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sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs
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sudo rm -rf /mnt/btrfs/*
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sync
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sudo umount /mnt/btrfs
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sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs
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# Run the benchmark
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echo "Compression"
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time sh -c "for i in \$(seq $N); do sudo cp -r $BENCHMARK_DIR /mnt/btrfs/\$i; done; sync"
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echo "Approximate compression ratio"
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printf "%d / %d\n" \
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$(df /mnt/btrfs --output=used -B 1 | tail -n 1) \
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$(sudo du /mnt/btrfs -b -d 0 | tr '\t' '\n' | head -n 1);
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# Unmount and remount to avoid any caching
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sudo umount /mnt/btrfs
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sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs
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echo "Decompression"
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time sudo tar -c /mnt/btrfs 2> /dev/null | wc -c > /dev/null
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sudo rm -rf /mnt/btrfs/*
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sudo umount /mnt/btrfs
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# Run for each of -o compress-force={none, lzo, zlib, zstd} 5 times and take the
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# min time and ratio.
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# Ran zstd with compression levels {1, 3, 6, 9, 12, 15}.
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# Original size: 2119415342 B (using du /mnt/btrfs)
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# none
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# compress: 4.205 s
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# decompress: 3.090 s
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# ratio: 0.99
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# lzo
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# compress: 5.328 s
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# decompress: 4.793 s
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# ratio: 1.66
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# zlib
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# compress: 32.588 s
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# decompress: 8.791 s
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# ratio : 2.58
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# zstd 1
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# compress: 8.147 s
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# decompress: 5.527 s
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# ratio : 2.57
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# zstd 3
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# compress: 12.207 s
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# decompress: 5.195 s
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# ratio : 2.71
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# zstd 6
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# compress: 30.253 s
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# decompress: 5.324 s
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# ratio : 2.87
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# zstd 9
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# compress: 49.659 s
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# decompress: 5.220 s
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# ratio : 2.92
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# zstd 12
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# compress: 99.245 s
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# decompress: 5.193 s
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# ratio : 2.93
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# zstd 15
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# compress: 196.997 s
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# decompress: 5.992 s
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# ratio : 3.01
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