ith fio to a raw ssd drive..
>
> Thanks & Regards
> Somnath
>
> -Original Message-
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
> Somnath Roy Sent: Monday, October 26, 2015 9:20 AM
> To: Christian Balzer; ceph-users@lists.ceph.com
&g
it?
Thanks
Regards,
Matteo
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Somnath Roy
Sent: lunedì 26 ottobre 2015 17:45
To: Christian Balzer <ch...@gol.com>; ceph-users@lists.ceph.com
Subject: Re: [ceph-users] BAD nvme SSD performance
Another
...@lists.ceph.com] On Behalf Of
Somnath Roy
Sent: lunedì 26 ottobre 2015 17:45
To: Christian Balzer <ch...@gol.com>; ceph-users@lists.ceph.com
Subject: Re: [ceph-users] BAD nvme SSD performance
Another point,
As Christian mentioned, try to evaluate O_DIRECT|O_DSYNC performance of a SSD
before ch
Hi all,
I've recently buy two Samsung SM951 256GB nvme PCIe SSDs and built a 2 OSD ceph
cluster with min_size = 1.
I've tested them with fio ad I obtained two very different results with these
two situations with fio.
This is the command : fio --ioengine=libaio --direct=1 --name=test
] On Behalf Of
Matteo Dacrema
Sent: 26 October 2015 11:20
To: ceph-us...@ceph.com
Subject: [ceph-users] BAD nvme SSD performance
Hi all,
I've recently buy two Samsung SM951 256GB nvme PCIe SSDs and built a 2 OSD
ceph cluster with min_size = 1.
I've tested them with fio ad I obtained two very
[mailto:ceph-users-boun...@lists.ceph.com] *On Behalf
> Of *Matteo Dacrema
> *Sent:* 26 October 2015 11:20
> *To:* ceph-us...@ceph.com <mailto:ceph-us...@ceph.com>
> *Subject:* [ceph-users] BAD nvme SSD performance
>
>
>
> Hi all,
>
>
>
> I’ve recently b
>
> > Ceph introduces latency into the write path and so what you are seeing
> > is typical. If you increase the iodepth of the fio test you should get
> > higher results though, until you start maxing out your CPU.
> >
> >
> >
> > Nick
> >
> >
>
the following..
osd_enable_op_tracker = false
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Christian Balzer
Sent: Monday, October 26, 2015 8:23 AM
To: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] BAD nvme SSD performance
Hello,
On Mon,
boun...@lists.ceph.com] On Behalf Of
Somnath Roy
Sent: Monday, October 26, 2015 9:20 AM
To: Christian Balzer; ceph-users@lists.ceph.com
Subject: Re: [ceph-users] BAD nvme SSD performance
One thing, *don't* trust iostat disk util% in case of SSDs..100% doesn't mean
you are saturating SSDs there..I have
