[Lustre-discuss] Lustre routers capabilities

[Sébastien Buisson]

Let's consider that the internal bus of the machine is bigger enough so 
that it will not be saturated. In that case, what will be the limiting 
factor? memory? CPU?
I know that it depends on how many I/B cards are plugged in the machine, 
but generally speaking, is the routing activity CPU or memory hungry?

By the way, are there people on that list that have feedback about 
Lustre routers sizing? For instance, I know that Lustre routers have 
been set up at the LLNL. What is the throughput obtained via the 
routers, compared to the raw bandwidth of the interconnect?

Thanks,
Sebastien.


Brian J. Murrell a écrit :
> On Wed, 2008-04-09 at 19:07 +0200, Sébastien Buisson wrote:
>> I mean, if I 
>> have an available bandwith of 100 on each side of a router, what will be 
>> the max reachable bandwith from clients on one side of the router to 
>> servers on the other side of the router? Is it 50? 80? 99? Is the 
>> routing process CPU or memory hungry?
> 
> While I can't answer these things specifically another important
> consideration is the bus architecture involved.  How many I/B cards can
> you put on a bus before you saturate the bus?
> 
> b.
> 
> 
> 
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