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.
8 # silesia is a directory that can be downloaded from
9 # http://mattmahoney.net/dc/silesia.html
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
25 # $HOME is on a ext4 filesystem
26 BENCHMARK_DIR="$HOME/silesia/"
29 # Normalize the environment
30 sudo umount /mnt/btrfs 2> /dev/null > /dev/null || true
31 sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs
32 sudo rm -rf /mnt/btrfs/*
34 sudo umount /mnt/btrfs
35 sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs
39 time sh -c "for i in \$(seq $N); do sudo cp -r $BENCHMARK_DIR /mnt/btrfs/\$i; done; sync"
41 echo "Approximate compression ratio"
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);
46 # Unmount and remount to avoid any caching
47 sudo umount /mnt/btrfs
48 sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs
51 time sudo tar -c /mnt/btrfs 2> /dev/null | wc -c > /dev/null
53 sudo rm -rf /mnt/btrfs/*
54 sudo umount /mnt/btrfs
56 # Run for each of -o compress-force={none, lzo, zlib, zstd} 5 times and take the
58 # Ran zstd with compression levels {1, 3, 6, 9, 12, 15}.
59 # Original size: 2119415342 B (using du /mnt/btrfs)
102 # compress: 196.997 s
103 # decompress: 5.992 s