nPars

[Ignite_2]

Hi,

Can you please advise with nPar reformation? The status I have is following: 2 x rx8640, on each server are two nPars running, each nPar has 6CPUs, which means there are 12 CPUs per server.

I need to change configuration in following way:
On each server will remain two nPars, but one will have 4 CPUs and second 8 CPUs.

And my question is, whether this can be done online, if CPU needs to be physically replaced by technician, or I can do it online.

nPars on different systems are clustered.

#swlist | grep HPUX11i
HPUX11i-OE-Ent B.11.23.0403 HP-UX Enterprise Operating Environment Component
HPUX11i-OE-MC B.11.23.0409 HP-UX Mission Critical Operating Environment Component


Can you please give a short hint?

[Torsten. · Accepted solution]

I don't know how many cells are there, but assuming there are 2 cells with 3 cpu modules each, you need to move a module from one cell to another.

[Ignite_2]

Hi,
thanks for prompt feedback. Cell status is following:

[Cell]
CPU Memory Use
OK/ (GB) Core On
Hardware Actual Deconf/ OK/ Cell Next Par
Location Usage Max Deconf Connected To Capable Boot Num
========== ============ ======= ========= =================== ======= ==== ===
cab0,cell0 Active Core 6/0/8 24.0/0.0 cab0,bay0,chassis0 yes yes 0
cab0,cell1 Active Core 8/0/8 88.0/0.0 cab0,bay0,chassis1 yes yes 1
cab0,cell2 Active Base 6/0/8 24.0/0.0 - no yes 0
cab0,cell3 Active Base 4/0/8 80.0/0.0 - no yes 1

[Torsten.]

But each npar has 12 cpus ...

[Ignite_2]

No, actually each nPar has 6 CPUs.

#parstatus -V -c0
[Cell]
Hardware Location : cab0,cell0
Global Cell Number : 0
Actual Usage : Active Core
Normal Usage : Base
Connected To : cab0,bay0,chassis0
Core Cell Capable : yes
Firmware Revision : 9.48
Failure Usage : Normal
Use On Next Boot : yes
Partition Number : 0
Partition Name : Partition 0
Requested CLM value : 0.0 GB
Allocated CLM value : 0.0 GB
Cell Architecture Type : Itanium(R)-based
CPU Compatibility : CDG-640
Hyperthreading Capable : yes

[CPU Details]

Type : FFFF
Speed : 1598 MHz
CPU Status
=== ======
0 OK
1 OK
2 OK
3 OK
4 OK
5 OK
6 Absent
7 Absent

CPUs
===========
OK : 6
Deconf : 0
Max : 8

[Memory Details]

DIMM Size (MB) Status
==== ========= =========
1A 4096 OK
1B 4096 OK
0A 4096 OK
0B 4096 OK
2A 4096 OK
2B 4096 OK

Memory
=========================
DIMM OK : 6
DIMM Deconf : 0
Max DIMMs : 16
Memory OK : 24.00 GB
Memory Deconf : 0.00 GB

[Torsten.]

This is a single cell, but there are 2 cells in each nPar.

Please post

# parstatus

# icapstatus

[Ignite_2]

Yes, I've posted just one, but they have same number of CPU. icapstatus is not present on system.

Note: No action specified. Default behavior is display all.
[Complex]
Complex Name : Complex 01
Complex Capacity
Compute Cabinet (4 cell capable) : 1
Active MP Location : cabinet 0
Original Product Name : server rx8640
Current Product Order Number : AB444A
OEM Manufacturer :
Complex Profile Revision : 1.0
The total number of partitions present : 2


[Cabinet]
Cabinet I/O Bulk Power Backplane
Blowers Fans Supplies Power Boards
OK/ OK/ OK/ OK/
Cab Failed/ Failed/ Failed/ Failed/
Num Cabinet Type N Status N Status N Status N Status MP
=== ============ ========= ========= ========== ============ ======
0 4 cell slot 21/0/N+ 6/0/N+ 6/0/N+ - Active

Notes: N+ = There are one or more spare items (fans/power supplies).
N = The number of items meets but does not exceed the need.
N- = There are insufficient items to meet the need.
? = The adequacy of the cooling system/power supplies is unknown.
HO = Housekeeping only; The power is in a standby state.
NA = Not Applicable.


[Cell]
CPU Memory Use
OK/ (GB) Core On
Hardware Actual Deconf/ OK/ Cell Next Par
Location Usage Max Deconf Connected To Capable Boot Num
========== ============ ======= ========= =================== ======= ==== ===
cab0,cell0 Active Core 6/0/8 24.0/0.0 cab0,bay0,chassis0 yes yes 0
cab0,cell1 Active Core 8/0/8 88.0/0.0 cab0,bay0,chassis1 yes yes 1
cab0,cell2 Active Base 6/0/8 24.0/0.0 - no yes 0
cab0,cell3 Active Base 4/0/8 80.0/0.0 - no yes 1

Notes: * = Cell has no interleaved memory.


[Chassis]
Core Connected Par
Hardware Location Usage IO To Num
=================== ============ ==== ========== ===
cab0,bay0,chassis0 Active yes cab0,cell0 0
cab0,bay0,chassis1 Active yes cab0,cell1 1


[Partition]
Par # of # of I/O
Num Status Cells Chassis Core cell Partition Name (first 30 chars)
=== ============ ===== ======== ========== ===============================
0 Active 2 1 cab0,cell0 Partition 0
1 Active 2 1 cab0,cell1 Partition 1


[Partition - HyperThread]
Par Num Hyperthreading Enabled Hyperthreading Active
======= ====================== =====================
0 no no
1 no no

[Ignite_2]

I think, that second cell is second system.

[Torsten.]

cab0,cell0 Active Core 6/0/8 24.0/0.0 cab0,bay0,chassis0 yes yes 0
cab0,cell1 Active Core 8/0/8 88.0/0.0 cab0,bay0,chassis1 yes yes 1
cab0,cell2 Active Base 6/0/8 24.0/0.0 - no yes 0
cab0,cell3 Active Base 4/0/8 80.0/0.0 - no yes 1


You have 4 cells,

cell0+cell2 = npar0

cell1+cell3 = npar1

cell0(6cpu)+cell2(6cpu)=12cpu

cell1(8cpu)+cell3(4cpu)=12cpu

run "machinfo" on each nPar to confirm

[Torsten.]

attach a

# ioscan -fnCprocessor

too, please.

[Ignite_2]

Hi,

machinfo shows 12CPUs per nPar and here's the ioscan output:

#ioscan -fnC processor
Class I H/W Path Driver S/W State H/W Type Description
===================================================================
processor 0 0/120 processor CLAIMED PROCESSOR Processor
processor 1 0/121 processor CLAIMED PROCESSOR Processor
processor 2 0/122 processor CLAIMED PROCESSOR Processor
processor 3 0/123 processor CLAIMED PROCESSOR Processor
processor 4 0/124 processor CLAIMED PROCESSOR Processor
processor 5 0/125 processor CLAIMED PROCESSOR Processor
processor 6 2/120 processor CLAIMED PROCESSOR Processor
processor 7 2/121 processor CLAIMED PROCESSOR Processor
processor 8 2/122 processor CLAIMED PROCESSOR Processor
processor 9 2/123 processor CLAIMED PROCESSOR Processor
processor 10 2/124 processor CLAIMED PROCESSOR Processor
processor 11 2/125 processor CLAIMED PROCESSOR Processor

Can you please tell me, what it can mean, if someone tell 6p/12c? Because this is situation on all nPars now and should be changed to 4p/8c + 8p/16c.

[Torsten.]

All of your CPUs are dual core, this means a "module" has 2 cores = 2 CPUs.

6p/12c

6 physical CPU modules = 12 CPU cores

[Ignite_2]

OK, now I'm more familiar with the current hw situation.

So would it be possible to get following configuration:

cell0+cell2 = npar0

cell1+cell3 = npar1

cell0(4cpu)+cell2(4cpu)=12cpu

cell1(8cpu)+cell3(8cpu)=12cpu

Do I need to physically replace CPU between cells?

[Ignite_2]

Maybe a stupid question above, sorry. I think it's necessary to have a CPU in correct cell board.

So if I understand idea of nPars correctly, we have to stop first partition, remove CPU from there and start it. Then stop second partition and insert CPU there.

Then when both partitions are up, I need to add CPU to it and reboot system with -R option.

Is that correct?

[Torsten.]

No. If you want to move CPUs physically, you need to power off the partition (better the complete system) and move the modules.

After boot all are there and active.

[Ignite_2]

Hi Torsten,

So I'll switch off the whole system and change CPUs. There is no need to add new CPU also using command line (when server will be running again)? It'll be automatically detected within partition?

Thanks a lot for your time

[Torsten.]

On a "pure" nPar (without vPars) - yes.

Just boot and use them.

[Ignite_2]

Thanks Torsten!