6, 2018 8:41 AM
> To: Satish Patel
> Cc: ceph-users
>
>
> Subject: Re: [ceph-users] SSDs for data drives
>
>
>
> This doesn't look like a good benchmark:
>
> (from the blog post)
>
> dd if=/dev/zero of=/mnt/rawdisk/data.bin bs=1G count=20 oflag=direct
>
I dunno, to me benchmark tests are only really useful to compare different
drives.
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Paul
Emmerich
Sent: Monday, July 16, 2018 8:41 AM
To: Satish Patel
Cc: ceph-users
Subject: Re: [ceph-users] SSDs for data drives
availability be handled by Ceph, don’t expect the performance to keep up.
> >
> >
> >
> >
> >
> >
> >
> > From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
> > Satish Patel
> > Sent: Wednesday, 11 July 2018 10:50 PM
> > T
p and cheerful and let the data
> availability be handled by Ceph, don’t expect the performance to keep up.
>
>
>
>
>
>
>
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
> Satish Patel
> Sent: Wednesday, 11 July 2018 10:50 PM
> To: Paul Emme
: Wednesday, 11 July 2018 10:50 PM
To: Paul Emmerich
Cc: ceph-users
Subject: Re: [ceph-users] SSDs for data drives
Prices going way up if I am picking Samsung SM863a for all data drives.
We have many servers running on consumer grade sad drives and we never noticed
any performance or any fault
In a recent thread the Samsung SM863a was recommended as a journal SSD.
Are there any recommendations for data SSDs, for people who want to use
just SSDs in a new Ceph cluster?
Take a look to HGST SN260, this is MLC NVMe's [1]
[1]
I am using S3510 for both filestore and bluestore.
Performance seems pretty good.
On Wed, Jul 11, 2018 at 5:44 PM, Robert Stanford
wrote:
>
> Any opinions on the Dell DC S3520 (for journals)? That's what I have,
> stock and I wonder if I should replace them.
>
> On Wed, Jul 11, 2018 at 8:34
Any opinions on the Dell DC S3520 (for journals)? That's what I have,
stock and I wonder if I should replace them.
On Wed, Jul 11, 2018 at 8:34 AM, Simon Ironside
wrote:
>
> On 11/07/18 14:26, Simon Ironside wrote:
>
> The 2TB Samsung 850 EVO for example is only rated for 300TBW (terabytes
>>
On 11/07/18 14:26, Simon Ironside wrote:
The 2TB Samsung 850 EVO for example is only rated for 300TBW (terabytes
written). Over the 5 year warranty period that's only 165GB/day, not
even 0.01 full drive writes per day. The SM863a part of the same size is
rated for 12,320TBW, over 3 DWPD.
On 11/07/18 13:49, Satish Patel wrote:
Prices going way up if I am picking Samsung SM863a for all data drives.
We have many servers running on consumer grade sad drives and we never
noticed any performance or any fault so far (but we never used ceph before)
I thought that is the whole
On 18-07-11 02:35 PM, David Blundell wrote:
Hi,
I’m looking at 4TB Intel DC P4510 for data drives running BlueStore with WAL,
DB and data on the same drives. Has anyone had any good / bad experiences with
them? As Intel’s new data centre NVMe SSD it should be fast and reliable but
then I
Hi,
We started with consumer grade SSDs. This was in normal operation no
problem, but did caused terrible performance during recovery or other
platform adjustments which involved datamovements. We finally decided to
replace everything with SM863 disks, which after a few years still
perform
Prices going way up if I am picking Samsung SM863a for all data drives.
We have many servers running on consumer grade sad drives and we never noticed
any performance or any fault so far (but we never used ceph before)
I thought that is the whole point of ceph to provide high availability if
Hi,
I’m looking at 4TB Intel DC P4510 for data drives running BlueStore with WAL,
DB and data on the same drives. Has anyone had any good / bad experiences with
them? As Intel’s new data centre NVMe SSD it should be fast and reliable but
then I would have thought the same about the DC S4600
Hi,
we‘ve no long-term data for the SM variant.
Performance is fine as far as we can tell, but the main difference between
these two models should be endurance.
Also, I forgot to mention that my experiences are only for the 1, 2, and 4 TB
variants. Smaller SSDs are often proportionally slower
Paul -
That's extremely helpful, thanks. I do have another cluster that uses
Samsung SM863a just for journal (spinning disks for data). Do you happen
to have an opinion on those as well?
On Wed, Jul 11, 2018 at 4:03 AM, Paul Emmerich
wrote:
> PM/SM863a are usually great disks and should be
PM/SM863a are usually great disks and should be the default go-to option,
they outperform
even the more expensive PM1633 in our experience.
(But that really doesn't matter if it's for the full OSD and not as
dedicated WAL/journal)
We got a cluster with a few hundred SanDisk Ultra II
Wido -
You're using the same SATA drive as journals and data drives both? I want
to make sure my question was understood, since you mention BlueStore (maybe
you were just using them for journals; I want to make sure I understood).
Thanks
On Wed, Jul 11, 2018 at 3:14 AM, Wido den Hollander
On 07/11/2018 10:10 AM, Robert Stanford wrote:
>
> In a recent thread the Samsung SM863a was recommended as a journal
> SSD. Are there any recommendations for data SSDs, for people who want
> to use just SSDs in a new Ceph cluster?
>
Depends on what you are looking for, SATA, SAS3 or NVMe?
In a recent thread the Samsung SM863a was recommended as a journal SSD.
Are there any recommendations for data SSDs, for people who want to use
just SSDs in a new Ceph cluster?
Thank you
___
ceph-users mailing list
ceph-users@lists.ceph.com
20 matches
Mail list logo
