We didn’t find a measurable difference doing this on 5100s, ymmv.
It depends on the controller...
With chipset SATA and LSI 9200 HBA the difference is huge. I have some
evidence here: https://yourcmc.ru/wiki/Ceph_performance#Server_SSDs
With some controllers it may be not the case.
--
>> SATA: Micron 5100-5200-5300, Seagate Nytro 1351/1551 (don't forget to
>> disable their cache with hdparm -W 0)
We didn’t find a measurable difference doing this on 5100s, ymmv.
Depending on your use-case, CRUSH rules (EC vs R), etc. sub-DWPD models may be
fine for OSDs, but I suggest higher
Also, just for more diversity, Samsung has the 883 DCT and the 860 DCT models
as well.
Both less than 1 DWPD, but they are enterprise rated.
Reed
> On Jan 3, 2020, at 2:10 AM, Eneko Lacunza wrote:
>
> I'm sure you know also the following, but just in case:
> - Intel SATA D3-S4610 (I think
I'm sure you know also the following, but just in case:
- Intel SATA D3-S4610 (I think they're out of stock right now)
- Intel SATA D3-S4510 (I see stock of these right now)
El 27/12/19 a las 17:56, vita...@yourcmc.ru escribió:
SATA: Micron 5100-5200-5300, Seagate Nytro 1351/1551 (don't forget
Quoting Sinan Polat (si...@turka.nl):
> Thanks for all the replies. In summary; consumer grade SSD is a no go.
>
> What is an alternative to SM863a? Since it is quite hard to get these due non
> non-stock.
PM863a ... lower endurance ... but still "enterprise" ... but as your
not concerned about
SATA: Micron 5100-5200-5300, Seagate Nytro 1351/1551 (don't forget to
disable their cache with hdparm -W 0)
NVMe: Intel P4500, Micron 9300
Thanks for all the replies. In summary; consumer grade SSD is a no go.
What is an alternative to SM863a? Since it is quite hard to get these
due non
Micron 9300
Obtener Outlook para Android<https://aka.ms/ghei36>
From: ceph-users on behalf of Sinan Polat
Sent: Friday, December 27, 2019 12:35:44 PM
To: Eneko Lacunza
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Consumer-grade SSD in Ceph
Thanks for all the replies. In summary; consumer grade SSD is a no go.
What is an alternative to SM863a? Since it is quite hard to get these due non
non-stock.
Thanks!
Sinan
> Op 23 dec. 2019 om 08:50 heeft Eneko Lacunza het
> volgende geschreven:
>
> Hi Sinan,
>
> Just to reiterate: don't
Hi Sinan,
Just to reiterate: don't do this. Consumer SSDs will destroy your
enterprise SSD's performance.
Our office cluster is made of consumer-grade servers: cheap gaming
motherboards, memory, ryzen processors, desktop HDDs. But SSD drives are
Enterprise, we had awful experiences with
the journal or db
partition.
From: ceph-users on behalf of Antoine
Lecrux
Sent: Thursday, December 19, 2019 4:02 PM
To: Udo Lembke ; Sinan Polat
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Consumer-grade SSD in Ceph
Hi,
If you're looking for a consumer
I had. 100-200 write iops with iodepth=1, ~5k iops with iodepth=128. These were
intel 545s.
Not that awful, but micron 5200 costs only a fraction more, so it seems
pointless to me to use desktop samsungs.
19 декабря 2019 г. 22:20:28 GMT+03:00, Sinan Polat пишет:
>Hi all,
>
>Thanks for the
Of Udo Lembke
Sent: Thursday, December 19, 2019 3:22 PM
To: Sinan Polat
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Consumer-grade SSD in Ceph
Hi,
if you add on more than one server an SSD with an short lifetime, you can run
in real trouble (dataloss)!
Even if, all other SSDs
Hi,
if you add on more than one server an SSD with an short lifetime, you
can run in real trouble (dataloss)!
Even if, all other SSDs are enterprise grade.
Ceph mix all data in PGs, which are spread over many disks - if one disk
fails - no poblem, but if the next two fails after that due high io
Hi all,
Thanks for the replies. I am not worried about their lifetime. We will be
adding only 1 SSD disk per physical server. All SSD’s are enterprise drives. If
the added consumer grade disk will fail, no problem.
I am more curious regarding their I/O performance. I do want to have 50% drop
The way I try to look at this is:
1) How much more do the enterprise grade drives cost?
2) What are the benefits? (Faster performance, longer life, etc)
3) How much does it cost to deal with downtime, diagnose issues, and
replace malfunctioning hardware?
My personal take is that
I dont think “usually” is good enough in a production setup.
Sent from myMail for iOS
Thursday, 19 December 2019, 12.09 +0100 from Виталий Филиппов
:
>Usually it doesn't, it only harms performance and probably SSD lifetime
>too
>
>> I would not be running ceph on ssds without powerloss
Usually it doesn't, it only harms performance and probably SSD lifetime
too
I would not be running ceph on ssds without powerloss protection. I
delivers a potential data loss scenario
___
ceph-users mailing list
ceph-users@lists.ceph.com
I would not be running ceph on ssds without powerloss protection. I delivers a
potential data loss scenario
Jesper
Sent from myMail for iOS
Thursday, 19 December 2019, 08.32 +0100 from Виталий Филиппов
:
>https://yourcmc.ru/wiki/Ceph_performance
>
https://yourcmc.ru/wiki/Ceph_performance
https://docs.google.com/spreadsheets/d/1E9-eXjzsKboiCCX-0u0r5fAjjufLKayaut_FOPxYZjc
19 декабря 2019 г. 0:41:02 GMT+03:00, Sinan Polat пишет:
>Hi,
>
>I am aware that
I know not your question, but what is the current SSD's your using in the
cluster?
You could end up with an imbalanced cluster performance wise, if you have a mix
of SSD's with a large performance difference, specially with filestore and it's
journal writes.
On Thu, 19 Dec 2019
Hi,
I am aware that
https://www.sebastien-han.fr/blog/2014/10/10/ceph-how-to-test-if-your-ssd-is-suitable-as-a-journal-device/
holds a list with benchmark of quite some different ssd models. Unfortunately it
doesn't have benchmarks for recent ssd models.
A client is planning to expand a running
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