> > opts="--randrepeat=1 --ioengine=rbd --direct=1 --numjobs=${numjobs}
> > --gtod_reduce=1 --name=test --pool=${pool} --rbdname=${vol} --invalidate=0
> > --bs=4k --iodepth=64 --time_based --runtime=$time --group_reporting"
> >
>
> So that "--numjobs" parameter is what I was referring to when I sa
t cpu frequency, disable rbd cache, disable client
debug, or others option which can lower cpu usage client side.
- Mail original -
De: "Nikola Ciprich"
À: "ceph-users"
Cc: "nik"
Envoyé: Mercredi 18 Juillet 2018 16:54:58
Objet: [ceph-users] krbd vs librbd p
On Wed, Jul 18, 2018 at 1:08 PM Nikola Ciprich
wrote:
> > Care to share your "bench-rbd" script (on pastebin or similar)?
> sure, no problem.. it's so short I hope nobody will get offended if I
> paste it right
> here :)
>
> #!/bin/bash
>
> #export LD_PRELOAD="/usr/lib64/libtcmalloc.so.4"
> numjo
> Care to share your "bench-rbd" script (on pastebin or similar)?
sure, no problem.. it's so short I hope nobody will get offended if I paste it
right
here :)
#!/bin/bash
#export LD_PRELOAD="/usr/lib64/libtcmalloc.so.4"
numjobs=8
pool=nvme
vol=xxx
time=30
opts="--randrepeat=1 --ioengine=rbd --d
On Wed, Jul 18, 2018 at 12:58 PM Nikola Ciprich
wrote:
> > What's the output from "rbd info nvme/centos7"?
> that was it! the parent had some of unsupported features
> enabled, therefore the child could not be mapped..
>
> so the error message is a bit confusing, but now after disabling
> the fea
> What's the output from "rbd info nvme/centos7"?
that was it! the parent had some of unsupported features
enabled, therefore the child could not be mapped..
so the error message is a bit confusing, but now after disabling
the features on the parent it works for me, thanks!
> Odd. The exclusive-l
On Wed, Jul 18, 2018 at 12:36 PM Nikola Ciprich
wrote:
> ;6QHi Janon,
>
> > Just to clarify: modern / rebased krbd block drivers definitely support
> > layering. The only missing features right now are object-map/fast-diff,
> > deep-flatten, and journaling (for RBD mirroring).
>
> I thought it as
;6QHi Janon,
> Just to clarify: modern / rebased krbd block drivers definitely support
> layering. The only missing features right now are object-map/fast-diff,
> deep-flatten, and journaling (for RBD mirroring).
I thought it as well, but at least mapping clone does not work for me even
under 4.1
On Wed, Jul 18, 2018 at 10:55 AM Nikola Ciprich
wrote:
> Hi,
>
> historically I've found many discussions about this topic in
> last few years, but it seems to me to be still a bit unresolved
> so I'd like to open the question again..
>
> In all flash deployments, under 12.2.5 luminous and qemu
Hi,
historically I've found many discussions about this topic in
last few years, but it seems to me to be still a bit unresolved
so I'd like to open the question again..
In all flash deployments, under 12.2.5 luminous and qemu 12.2.0
using lbirbd, I'm getting much worse results regarding IOPS th
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