[lustre-discuss] Frequency vs Cores for OSS/MDS processors

[Jeff Johnson]

If you only have those two processor models to choose from I’d do the 5217
for MDS and 5218 for OSS. If you were using ZFS for a backend definitely
the 5218 for the OSS. With ZFS your processors are also your RAID
controller so you have the disk i/o, parity calculation, checksums and ZFS
threads on top of the Lustre i/o and OS processes.

—Jeff

On Thu, Jul 4, 2019 at 13:30 Simon Legrand <simon.legrand at inria.fr> wrote:

> Hello Jeff,
>
> Thanks for your quick answer. We plan to use ldiskfs, but I would be
> interested to know what could fit for zfs.
>
> Simon
>
> ------------------------------
>
> *De: *"Jeff Johnson" <jeff.johnson at aeoncomputing.com>
> *À: *"Simon Legrand" <simon.legrand at inria.fr>
> *Cc: *"lustre-discuss" <lustre-discuss at lists.lustre.org>
> *Envoyé: *Jeudi 4 Juillet 2019 20:40:40
> *Objet: *Re: [lustre-discuss] Frequency vs Cores for OSS/MDS processors
>
> Simon,
>
> Which backend do you plan on using? ldiskfs or zfs?
>
> —Jeff
>
> On Thu, Jul 4, 2019 at 10:41 Simon Legrand <simon.legrand at inria.fr> wrote:
>
>> Dear all,
>>
>> We are currently configuring a Lustre filesystem and facing a dilemma. We
>> have the choice between two types of processors for an OSS and a MDS.
>> - Intel Xeon Gold 5217 3GHz, 11M Cache,10.40GT/s, 2UPI, Turbo, HT,8C/16T
>> (115W) - DDR4-2666
>> - Intel Xeon Gold 5218 2.3GHz, 22M Cache,10.40GT/s, 2UPI, Turbo,
>> HT,16C/32T (105W) - DDR4-2666
>>
>> Basically, we have to choose between freequency and number of cores.
>> Our current architecture is the following:
>> - 1MDS with 11To SDD
>> - 3 OSS/OST (~ 3*80To)
>> Our final target is 6 OSS/OST with a single MDS.
>> Do anyone of you could help us to choose and explain us the reasons?
>>
>> Best regards,
>>
>> Simon
>> _______________________________________________
>> lustre-discuss mailing list
>> lustre-discuss at lists.lustre.org
>> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>>
> --
> ------------------------------
> Jeff Johnson
> Co-Founder
> Aeon Computing
>
> jeff.johnson at aeoncomputing.com
> www.aeoncomputing.com
> t: 858-412-3810 x1001   f: 858-412-3845
> m: 619-204-9061
>
> 4170 Morena Boulevard, Suite C - San Diego, CA 92117
> <https://www.google.com/maps/search/4170+Morena+Boulevard,+Suite+C+-+San+Diego,+CA+92117?entry=gmail&source=g>
> High-Performance Computing / Lustre Filesystems / Scale-out Storage
>
> --
------------------------------
Jeff Johnson
Co-Founder
Aeon Computing

jeff.johnson at aeoncomputing.com
www.aeoncomputing.com
t: 858-412-3810 x1001   f: 858-412-3845
m: 619-204-9061

4170 Morena Boulevard, Suite C - San Diego, CA 92117

High-Performance Computing / Lustre Filesystems / Scale-out Storage
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