1# !/bin/sh 2set -e 3 4# Benchmarks run on a Ubuntu 14.04 VM with 2 cores and 4 GiB of RAM. 5# The VM is running on a Macbook Pro with a 3.1 GHz Intel Core i7 processor and 6# 16 GB of RAM and an SSD. 7 8# silesia is a directory that can be downloaded from 9# http://mattmahoney.net/dc/silesia.html 10# ls -l silesia/ 11# total 203M 12# -rwxr-xr-x 1 terrelln 9.8M Apr 12 2002 dickens 13# -rwxr-xr-x 1 terrelln 49M May 31 2002 mozilla 14# -rwxr-xr-x 1 terrelln 9.6M Mar 20 2003 mr 15# -rwxr-xr-x 1 terrelln 32M Apr 2 2002 nci 16# -rwxr-xr-x 1 terrelln 5.9M Jul 4 2002 ooffice 17# -rwxr-xr-x 1 terrelln 9.7M Apr 11 2002 osdb 18# -rwxr-xr-x 1 terrelln 6.4M Apr 2 2002 reymont 19# -rwxr-xr-x 1 terrelln 21M Mar 25 2002 samba 20# -rwxr-xr-x 1 terrelln 7.0M Mar 24 2002 sao 21# -rwxr-xr-x 1 terrelln 40M Mar 25 2002 webster 22# -rwxr-xr-x 1 terrelln 8.1M Apr 4 2002 x-ray 23# -rwxr-xr-x 1 terrelln 5.1M Nov 30 2000 xml 24 25# $HOME is on a ext4 filesystem 26BENCHMARK_DIR="$HOME/silesia/" 27N=10 28 29# Normalize the environment 30sudo umount /mnt/btrfs 2> /dev/null > /dev/null || true 31sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs 32sudo rm -rf /mnt/btrfs/* 33sync 34sudo umount /mnt/btrfs 35sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs 36 37# Run the benchmark 38echo "Compression" 39time sh -c "for i in \$(seq $N); do sudo cp -r $BENCHMARK_DIR /mnt/btrfs/\$i; done; sync" 40 41echo "Approximate compression ratio" 42printf "%d / %d\n" \ 43 $(df /mnt/btrfs --output=used -B 1 | tail -n 1) \ 44 $(sudo du /mnt/btrfs -b -d 0 | tr '\t' '\n' | head -n 1); 45 46# Unmount and remount to avoid any caching 47sudo umount /mnt/btrfs 48sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs 49 50echo "Decompression" 51time sudo tar -c /mnt/btrfs 2> /dev/null | wc -c > /dev/null 52 53sudo rm -rf /mnt/btrfs/* 54sudo umount /mnt/btrfs 55 56# Run for each of -o compress-force={none, lzo, zlib, zstd} 5 times and take the 57# min time and ratio. 58# Ran zstd with compression levels {1, 3, 6, 9, 12, 15}. 59# Original size: 2119415342 B (using du /mnt/btrfs) 60 61# none 62# compress: 4.205 s 63# decompress: 3.090 s 64# ratio: 0.99 65 66# lzo 67# compress: 5.328 s 68# decompress: 4.793 s 69# ratio: 1.66 70 71# zlib 72# compress: 32.588 s 73# decompress: 8.791 s 74# ratio : 2.58 75 76# zstd 1 77# compress: 8.147 s 78# decompress: 5.527 s 79# ratio : 2.57 80 81# zstd 3 82# compress: 12.207 s 83# decompress: 5.195 s 84# ratio : 2.71 85 86# zstd 6 87# compress: 30.253 s 88# decompress: 5.324 s 89# ratio : 2.87 90 91# zstd 9 92# compress: 49.659 s 93# decompress: 5.220 s 94# ratio : 2.92 95 96# zstd 12 97# compress: 99.245 s 98# decompress: 5.193 s 99# ratio : 2.93 100 101# zstd 15 102# compress: 196.997 s 103# decompress: 5.992 s 104# ratio : 3.01 105