[sheepdog-users] background pusher may slow down write speed

[Valerio Pachera]

root at backup:/mnt/backup# dd if=/dev/zero of=c bs=1M count=512
512+0 record dentro
512+0 record fuori
536870912 byte (537 MB) copiati, 74,0173 s, 7,3 MB/s


Cache is enable on sheep and qemu

sheep -w size=20000 /mnt/ST2000DM001-1CH164_W1E2N5GM
/mnt/ST2000DM001-1CH164_W1E2N5GM/obj,/mnt/wd_WMAYP1690412

qemu-system-x86_64 -name backup -enable-kvm -drive
file=sheepdog:backp,cache=writeback -drive
file=sheepdog:backup_data,cache=writeback ...

sheep v 0.6.0_23_gd0b2857

The only thing I can think about is the introduction of background pusher.