topic Re: Multi Processor in Operating System - HP-UX

Multi Processor

P.V.Ramesh — Mon, 12 Aug 2002 18:13:11 GMT

How do i halt a processor in a multi processor systems

Re: Multi Processor

Pete Randall — Mon, 12 Aug 2002 18:16:11 GMT

You don't.

Pete

Re: Multi Processor

P.V.Ramesh — Mon, 12 Aug 2002 18:18:42 GMT

Then is processors are not hot- swappable in servers?

Re: Multi Processor

Christopher McCray_1 — Mon, 12 Aug 2002 18:21:40 GMT

They are not hot-swappable... The system must be down and powered off to replace a CPU.

Chris

Re: Multi Processor

Victor_5 — Mon, 12 Aug 2002 18:23:13 GMT

I don't think you can do it!

Re: Multi Processor

Patrick Wallek — Mon, 12 Aug 2002 18:50:20 GMT

Some of the newer systems MIGHT let you do OLAR (On Line Addition / Replacement) for processor boards but I'm not sure. I think most systems use processor boards with multiple processors, I think usually 2, per board, so you'd have to power down the whole processor board which wouldn't be easy.

Easiest thing: Power down the whole machine.

Re: Multi Processor

Martin Johnson — Mon, 12 Aug 2002 19:02:07 GMT

The OS will "turn off" a processor if it is logging errors. It cannot be done manually (maybe on the new systems).

HTH
Marty

Re: Multi Processor

Christopher McCray_1 — Mon, 12 Aug 2002 19:14:20 GMT

Hello again,

The newest servers I have are N4000, but this is what I know about this:

The server must be powered off to replace a CPU.

The server can sustain a CPU going down and continue on, but if a CPU replacement isn't immediately possible, then the CPU should be deconfigured.

The CPU can be deconfigured through the GSP.

Hope this helps

Chris

Re: Multi Processor

Sridhar Bhaskarla — Mon, 12 Aug 2002 19:54:13 GMT

Ramesh,

Is is possible to deactivate processors using ICOD. But you cannot do maintenance while the system is running.

ICOD (Instant capacity on demand) is a product to be purchased seperately.

-Sri