hi, josh.durgin:
i want to know how librbd launch io request.
use case:
inside vm, i use fio to test rbd-disk's io performance.
fio's pramaters are bs=4k, direct io, qemu cache=none.
in this case, if librbd just send what it gets from vm， i mean no
gather/scatter. the rate , io inside vm : io at librbd: io at osd filestore =
1:1:1?
thanks
----fio----
[global]
ioengine=libaio
buffered=0
rw=randrw
#size=3g
#directory=/data1
filename=/dev/vdb
[file0]
iodepth=1
bs=4k
time_based
runtime=300
stonewall
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