[ceph-users] how to improve performance

Nigel Williams nigel.williams at tpac.org.au
Mon Nov 20 15:35:57 PST 2017


On 21 November 2017 at 10:07, Christian Balzer <chibi at gol.com> wrote:
> On Tue, 21 Nov 2017 10:00:28 +1100 Nigel Williams wrote:
>> Is there something in the specifications that gives them away as SSHD?
>>
> The 550TB endurance per year for an 8TB drive and the claim of 30% faster
> IOPS would be a dead giveaway, one thinks.

I just found this other answer:

http://products.wdc.com/library/other/2579-772003.pdf

Hard-drive manufacturers introduced workload specifications because
they better model failure rates than MTTF.

I see the drive has 2MB of NOR-flash for write-caching, what happens
when this wears out?


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