Re: ceph-fuse, fio largely better after migration Infernalis to Jewel, is my bench relevant?

[Gregory Farnum <gfarnum@xxxxxxxxxx>]

We had several metadata caching improvements in ceph-fuse recently which I think went in after Infernalis. That could explain it.

-Greg

On Monday, June 6, 2016, Francois Lafont <flafdivers@xxxxxxx> wrote:

Hi,

I have a little Ceph cluster in production with 5 cluster nodes and 2
client nodes. The clients are using cephfs via fuse.ceph. Recently, I
have upgraded my cluster from Infernalis to Jewel (servers _and_ clients).

When the cluster was in Infernalis version the fio command below gave
me approximatively 1100-1300 iops.

fio --directory=/mnt/moodle/test/ --name=rwjob --readwrite=randrw \
    --rwmixread=50 --gtod_reduce=1 --bs=4k --size=100MB           \
    --ioengine=sync --direct=0 --numjobs=4 --group_reporting

I have tested the exactly same fio command after the migration where the
all nodes are in Jewel version and I have ~ 2500-3000 iops.

I know that benchs can be very tricky so here is my question: is this
significant improvement due to the "Infernalis => Jewel" migration, or
is my test not relevant?

Thanks in advance for your help.

--
François Lafont
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