[gpfsug-discuss] Used virtualization technologies for GPFS/Spectrum Scale

[valdis.kletnieks at vt.edu]

On Mon, 24 Apr 2017 14:21:09 +0200, "service at metamodul.com" said:

> todays hardware is so powerful that imho it might make sense to split a CEC
> into more "piece". For example the IBM S822L has up to 2x12 cores, 9 PCI3 slots
> ( 4×16 lans & 5×8 lan ).

We look at it the other way around: Today's hardware is so powerful that
you can build a cluster out of a stack of fairly low-end 1U servers (we
have one cluster that's built out of Dell r630s). And it's more robust
against hardware failures than a VM based solution - although the 822 seems
to allow hot-swap of PCI cards, a dead socket or DIMM will still kill all
the VMs when you go to replace it.  If one 1U out of 4 goes down due to
a bad DIMM (which has happened to us more often than a bad PCI card) you
can just power it down and replace it....
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