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.kirkwood@xxxxxxxxxxxxxxx> 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).
--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org )
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
Charles Nadeau Ph.D.
http://charlesnadeau.blogspot.com/
http://charlesnadeau.blogspot.com/
