On Fri, 25 Mar 2016 09:17:08 + Zhang Qiang wrote:
> Hi Christian, Thanks for your reply, here're the test specs:
> >>>
> [global]
> ioengine=libaio
> runtime=90
> direct=1
There it is.
You do understand what that flag does and what latencies are, right?
You're basically telling the I/O
FYI when I performed testing on our cluster I saw the same thing.
fio randwrite 4k test over a large volume was a lot faster with larger RBD
object size (8mb was marginally better than the default 4mb). It makes no sense
to me unless there is a huge overhead with increasing number of objects. Or
Hi Christian, Thanks for your reply, here're the test specs:
>>>
[global]
ioengine=libaio
runtime=90
direct=1
group_reporting
iodepth=16
ramp_time=5
size=1G
[seq_w_4k_20]
bs=4k
filename=seq_w_4k_20
rw=write
numjobs=20
[seq_w_1m_20]
bs=1m
filename=seq_w_1m_20
rw=write
numjobs=20
Test
Hello,
On Fri, 25 Mar 2016 08:11:27 + Zhang Qiang wrote:
> Hi all,
>
> According to fio,
Exact fio command please.
>with 4k block size, the sequence write performance of
> my ceph-fuse mount
Exact mount options, ceph config (RBD cache) please.
>is just about 20+ M/s, only 200 Mb of 1
Hi all,
According to fio, with 4k block size, the sequence write performance of my
ceph-fuse mount is just about 20+ M/s, only 200 Mb of 1 Gb full duplex NIC
outgoing bandwidth was used for maximum. But for 1M block size the
performance could achieve as high as 1000 M/s, approaching the limit of
