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 <si...@turka.nl> пишет:
>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 in performance.
>
>So anyone any experience with 860 EVO or Crucial MX500 in a Ceph setup?
>
>Thanks!
>
>> Op 19 dec. 2019 om 19:18 heeft Mark Nelson <mnel...@redhat.com> het
>volgende geschreven:
>>
>> 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 enterprise drives are usually worth it.
>There may be consumer grade drives that may be worth considering in
>very specific scenarios if they still have power loss protection and
>high write durability. Even when I was in academia years ago with very
>limited budgets, we got burned with consumer grade SSDs to the point
>where we had to replace them all. You have to be very careful and know
>exactly what you are buying.
>>
>>
>> Mark
>>
>>
>>> On 12/19/19 12:04 PM, jes...@krogh.cc wrote:
>>> 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
><vita...@yourcmc.ru>:
>>>
>>> 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
>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>
>> _______________________________________________
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>
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--
With best regards,
Vitaliy Filippov
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