[gpfsug-discuss] Connecting IBM ESS 3200 to 10 Gb Ethernet

[Sathya S R R Perumal]

 It's often the case that vendors sell more than what is needed for profit
maximizing,  unless there is a genuine high speed requirement. Such a way
that is so used to the general requirement that not to bother the basics.

/Sathya
On Mon, 5 Jun 2023, 22:48 Alec, <anacreo at gmail.com> wrote:

> Sadly no I'm not kidding...  Network engineers tend to be more focused on
> availability and general needs not special needs of a high speed data
> environment and so I give them a pass.
>
> As I used to say SAN engineers were Unix engineers who couldn't do Unix..
> so they are what they are.
>
> I can't tell you how many times I've seen millions of dollars or hardware
> under perming to a tiny fraction because someone didn't cable it with
> enough cables to do the job.  Like constrained ISL or something...  Or
> they'll just discount the two storage ports that are RED with saturation
> and say 99% of ports are green... So no problem here.
>
> Alec
>
> Alec
>
> On Mon, Jun 5, 2023, 10:05 AM Jonathan Buzzard <
> jonathan.buzzard at strath.ac.uk> wrote:
>
>> On 05/06/2023 17:41, Alec wrote:
>> >
>> > Many network storage engineers simply don't understand bandwidth (or
>> the
>> > importance of port groups)...  With an ESS you are talking GIGA*BYTES*
>> > per second and storage and networking architects simply see 10Gbe and
>> > assume that's good enough. A 10Gbe connection can do about 1.4GB/s..
>> > 100Gbe can do 12.5GB/s.   To the wrong engineer you can explain this
>> > until you're blue in the face and they won't get it.  You need to
>> divide
>> > Gbe by 8 to get about the GB/s throughput.  Explain to them that a
>> USB-C
>> > interface is capable of 10Gbe... So you're throttling millions of
>> > dollars in technology to the speed of a consumer grade USB-C
>> interface.
>> > When infact an ESS can drive at least 2x100Gbe to saturation.
>> >
>> > I don't have an ESS but a classic SAN array and Spectrum Scale and I
>> can
>> > saturate 32*8Gbe fiber connections.
>> >
>>
>> Your kidding right? That's basic competency for the job!!!
>>
>>
>> JAB.
>>
>> --
>> Jonathan A. Buzzard                         Tel: +44141-5483420
>> HPC System Administrator, ARCHIE-WeSt.
>> University of Strathclyde, John Anderson Building, Glasgow. G4 0NG
>>
>>
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