Re: Very poor read performance, query independent

Mark,

The server is a HP DL 380 G6. It doesn't really work with SATA drives. And
when you find one that is compatible, it is only used at 3Gb/s with a
maximum of 50000 IOPS (a well know caracteristic of the HP P410i SAS RAID
controller). I am looking at getting a Kingston Digital HyperX Predator
that I could use in one of the PCIe 2.0 x4 slot. However I am worried about
the "thermal runaway", i.e. when the server can't get a temperature reading
from a PCIe card, it spins the fans at full speed to protect the server
against high temperature. The machine being next to my desk I worry about
the deafening noise it will create.
Thanks!

Chales

On Sat, Jul 15, 2017 at 1:57 AM, Mark Kirkwood <
mark(dot)kirkwood(at)catalyst(dot)net(dot)nz> wrote:

> Thinking about this a bit more - if somewhat more blazing performance is
> needed, then this could be achieved via losing the RAID card and spinning
> disks altogether and buying 1 of the NVME or SATA solid state products: e.g
>
> - Samsung 960 Pro or Evo 2 TB (approx 1 or 2 GB/s seq scan speeds and 200K
> IOPS)
>
> - Intel S3610 or similar 1.2 TB (500 MB/s seq scan and 30K IOPS)
>
>
> The Samsung needs an M.2 port on the mobo (but most should have 'em - and
> if not PCIe X4 adapter cards are quite cheap). The Intel is a bit more
> expensive compared to the Samsung, and is slower but has a longer lifetime.
> However for your workload the Sammy is probably fine.
>
> regards
>
> Mark
>
> On 15/07/17 11:09, Mark Kirkwood wrote:
>
>> Ah yes - that seems more sensible (but still slower than I would expect
>> for 5 disks RAID 0).
>>
>
>
>
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--
Charles Nadeau Ph.D.
http://charlesnadeau.blogspot.com/