Boston Linux & UNIX was originally founded in 1994 as part of The Boston Computer Society. We meet on the third Wednesday of each month at the Massachusetts Institute of Technology, in Building E51.

BLU Discuss list archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Discuss] Whence distributed operating systems?

On 4/28/2016 4:28 AM, Bill Bogstad wrote:
> So memory was shared? between the QBBs?   This sounds more like a NUMA
> architecture environment.  What would you say are the differences
> between this definition
> of SSI and NUMA?

In a NUMA machine, memory is directly attached to the CPUs but not all
of that memory is local to each CPU. Galaxy wasn't NUMA. Each QBB was
NUMA: 4 processors with 512MB local to each with the rest being
non-local but still directly attached. Memory in one QBB was not
directly attached to the processors in other QBBs; it was shared via
software over a fibre data bus.

Rich P.

BLU is a member of BostonUserGroups
BLU is a member of BostonUserGroups
We also thank MIT for the use of their facilities.

Valid HTML 4.01! Valid CSS!

Boston Linux & Unix /