=== ext4 on giskard === {{{ /dev/sda7, ext4 + extents,mballoc,data=writeback root@giskard:~/src# time cp -a oe oe2 ; time sync real 0m33.981s user 0m0.452s sys 0m4.784s real 0m7.375s user 0m0.004s sys 0m0.188s }}} 371 / (33.98+7.37) = 8.97 MB/s === btrfs on giskard === {{{ giskard:/# time cp -a /home/bernie/src/oe / real 1m3.186s user 0m0.519s sys 0m29.894s giskard:/# mount -o remount,noatime,nodatasum,nobarrier / giskard:/# time cp -a oe oe2 real 1m7.247s user 0m0.391s sys 0m26.580s giskard:/# time cp -a oe oe2; time sync real 0m26.838s user 0m0.311s sys 0m17.783s real 0m19.898s user 0m0.001s sys 0m1.977s }}} 371MB/(27+20) = 7.89MB/s