[ ... ]
> Also added:
Feeling very generous :-) today, adding these too:
soft# mkfs.btrfs -mraid10 -draid10 -L test5 /dev/sd{b,c,d,e}3
[ ... ]
soft# mount -t btrfs -o commit=10,compress-force=zlib /dev/sdb3 /mnt/test5
soft# rm -f /mnt/test5/testfile
soft# /usr/bin/time dd iflag=fullblock if=/dev/sda6 of=/mnt/test5/testfile bs=1M count=3000 conv=fsync
3000+0 records in
3000+0 records out
3145728000 bytes (3.1 GB) copied, 14.2166 s, 221 MB/s
0.00user 2.54system 0:14.21elapsed 17%CPU (0avgtext+0avgdata 3056maxresident)k
0inputs+6144768outputs (0major+346minor)pagefaults 0swaps
soft# rm -f /mnt/test5/testfile
soft# /usr/bin/time dd iflag=fullblock if=/dev/sda6 of=/mnt/test5/testfile bs=128k count=3000 conv=fsync
3000+0 records in
3000+0 records out
393216000 bytes (393 MB) copied, 2.05933 s, 191 MB/s
0.00user 0.32system 0:02.06elapsed 15%CPU (0avgtext+0avgdata 1996maxresident)k
0inputs+772512outputs (0major+124minor)pagefaults 0swaps
soft# rm -f /mnt/test5/testfile
soft# /usr/bin/time dd iflag=fullblock if=/dev/sda6 bs=1M count=1000 | dd iflag=fullblock of=/mnt/test5/testfile bs=1M oflag=sync
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 60.6019 s, 17.3 MB/s
0.01user 1.04system 1:00.60elapsed 1%CPU (0avgtext+0avgdata 2888maxresident)k
0inputs+0outputs (0major+348minor)pagefaults 0swaps
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 60.4116 s, 17.4 MB/s
soft# rm -f /mnt/test5/testfile
soft# /usr/bin/time dd iflag=fullblock if=/dev/sda6 bs=128k count=3000 | dd iflag=fullblock of=/mnt/test5/testfile bs=128k oflag=sync
3000+0 records in
3000+0 records out
393216000 bytes (393 MB) copied, 148.04 s, 2.7 MB/s
0.00user 0.62system 2:28.04elapsed 0%CPU (0avgtext+0avgdata 1996maxresident)k
0inputs+0outputs (0major+125minor)pagefaults 0swaps
3000+0 records in
3000+0 records out
393216000 bytes (393 MB) copied, 148.083 s, 2.7 MB/s
soft# sysctl vm/drop_caches=3
vm.drop_caches = 3
soft# /usr/bin/time dd iflag=fullblock if=/mnt/test5/testfile bs=128k count=3000 of=/dev/zero
3000+0 records in
3000+0 records out
393216000 bytes (393 MB) copied, 1.09729 s, 358 MB/s
0.00user 0.24system 0:01.10elapsed 23%CPU (0avgtext+0avgdata 2164maxresident)k
459768inputs+0outputs (3major+121minor)pagefaults 0swaps
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