Le 01/12/2013 15:22, German Anders a écrit :
[...]
ceph@ceph-deploy01:/mnt/ceph-btrfs-test$ for i in 1 2 3 4; do sudo dd
if=/dev/zero of=./a bs=1M count=1000; done
Hello,
You should really write anything but zeros.
I suspect that nothing is really written to disk, specially on btrfs, a
cow filesystem with thin provisioning features.
Perhaps Ceph itself handle that like a sparse file.
Write a real file (iso image) or use a benchmark tool made for it, like fio.
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