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nPar and iCAP

 
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Anubhav Dhingra
Frequent Advisor

nPar and iCAP

Hi,

We have a rx8640 server with 11iV3 with 32 Cores but only 20 cores are active with one nPar. There are two IO chassis. So now I wanted to create one more nPar using cell 1&3 and leaving Cell 0&2 with existing nPar0. So i removed Cell 1&3 from the nPar using parmodify -d command and rebooted the server. Now I am unable to create a new Partition as its giving the error message

# parcreate -c1:base:y:ri -c3:base:y:ri
Note: It may take a longer time for the partition to boot if
any cell is performing power-on selftest.
Internal Error: Exception caught for modify.
Operation failed.[Configuration changes that might affect the Instant Capacity (iCAP) state of this system are not allowed from this partition]
Error: Unable to update the Stable Complex Configuration Data.

The output of parstatus is as follows:

parstatus
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
Original Serial Number : DEH5028JTJ
Current Product Order Number : AB444A
OEM Manufacturer :
Complex Profile Revision : 1.0
The total number of partitions present : 1
GSM sharing : Disabled Complex-wide


[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+ 5/1/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 8/0/8 32.0/0.0 cab0,bay0,chassis0 yes yes 0
cab0,cell1 Inactive 8/0/8 32.0/0.0 cab0,bay0,chassis1 yes - -
cab0,cell2 Active Base 8/0/8 32.0/0.0 - no yes 0
cab0,cell3 Inactive 8/0/8 32.0/0.0 - no - -

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 Inactive yes cab0,cell1 -


[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


[Partition - HyperThread]
Par Num Hyperthreading Enabled Hyperthreading Active
======= ====================== =====================
0 yes yes


Do I need to Deconfigure some CPUS through EFI from this Partition.
7 REPLIES 7
Anubhav Dhingra
Frequent Advisor

Re: nPar and iCAP

icapstatus
Software version: B.11.31.09.03.00.07
System ID: test1
Serial number: DEH5028JTJ
Product number: AB444A
Unique ID: 953e6920-ada2-11df-b2ab-f24edac01bb4
System contact e-mail: Not set
From e-mail: Set to the default ('adm')
Asset reporting: off
Temporary capacity warning period: 15 days
Exception status: No exception

Local nPartition Status (11/02/10 14:31:46)
-------------------------------------------
Total number of configured cores: 16
Number of Intended Active cores: 16
Number of active cores: 16
Number of inactive cores: 0
Additional cores that can be activated with current usage rights: 0
Number of cores that could be activated with additional usage rights: 0
Number of cores that can be activated with temporary capacity: 0
Number of cores that are deconfigured or attached to inactive cells: 0

Instant Capacity Resource Summary
---------------------------------
Number of cells without usage rights: 0
Number of inactive cells: 2
Amount of memory without usage rights: 0.0 GB
Amount of inactive memory: 64.0 GB
Number of cores without usage rights: 12
Number of inactive cores: 16
Number of cores that must be deactivated (insufficient usage rights): 0
Temporary capacity available: 0 days, 0 hours, 0 minutes

Allocation of Instant Capacity Resources among the nPartitions
--------------------------------------------------------------
Intended Actual
nPar Total Active Active =======Inactive======= Runs
ID Cores Cores Cores Cores Memory Cells iCAP nPar Name
==== ===== ======== ====== ====================== ==== ======================
0 16 16 16 0 0.0 GB 0 Yes Partition 0 (local)
N/A 16 N/A N/A N/A 64.0 GB 2 N/A Unassigned Cells
Anubhav Dhingra
Frequent Advisor

Re: nPar and iCAP

I have now re-assigned the Cells to Partition 0 and the icapstatus is as follows
icapstatus
Software version: B.11.31.09.03.00.07
System ID: test1
Serial number: DEH5028JTJ
Product number: AB444A
Unique ID: 953e6920-ada2-11df-b2ab-f24edac01bb4
System contact e-mail: Not set
From e-mail: Set to the default ('adm')
Asset reporting: off
Temporary capacity warning period: 15 days
Exception status: No exception

Local nPartition Status (11/02/10 14:43:43)
-------------------------------------------
Total number of configured cores: 32
Number of Intended Active cores: 20
Number of active cores: 20
Number of inactive cores: 12
Additional cores that can be activated with current usage rights: 0
Number of cores that could be activated with additional usage rights: 12
Number of cores that can be activated with temporary capacity: 0
Number of cores that are deconfigured or attached to inactive cells: 0

Instant Capacity Resource Summary
---------------------------------
Number of cells without usage rights: 0
Number of inactive cells: 0
Amount of memory without usage rights: 0.0 GB
Amount of inactive memory: 0.0 GB
Number of cores without usage rights: 12
Number of inactive cores: 12
Number of cores that must be deactivated (insufficient usage rights): 0
Temporary capacity available: 0 days, 0 hours, 0 minutes

Allocation of Instant Capacity Resources among the nPartitions
--------------------------------------------------------------
Intended Actual
nPar Total Active Active =======Inactive======= Runs
ID Cores Cores Cores Cores Memory Cells iCAP nPar Name
==== ===== ======== ====== ====================== ==== ======================
0 32 20 20 12 0.0 GB 0 Yes Partition 0 (local)
N/A 0 N/A N/A N/A 0.0 GB 0 N/A Unassigned Cells
Abu Bakkar Siddik Sarka
Occasional Visitor
Solution

Re: nPar and iCAP

Hi Anubhav,
I believe you are not able to create the partition for the following reason:

When you try to create the partition you already have 16 active cores from the nPar0, hence you are left with only 4 core usage rights using which you are trying to create the new partition. But the new partition (which you are trying to create) is already assuming all the 16 cores in that partition to be active even before you create them. So your whole complex is coming to a total of 32 active cores.

In order to create the new partition what exactly got to do is first disable the 12 cores in npar0 using icapmodify command and then remove cell 1 & 3 from the npar0, and then create the new partition using the parcreate command. Now you should be able to successfully create the new partition. In case you want to activate more than 4 cores in nPar0 (I mean the previous partition), you need to load HP-UX or OpenVMS on the newly created partition and then deactivate the cores (using icapmodify command) in the newly created partition in order to free up the usage rights to be used by nPar0.

You may refer the following document (http://www.hp.com/softwarereleases/releases-media2/notices/Maintaining_iCAP_Compliance.pdf )which provides some understanding about maintaining iCAP compliance while creating new partition. Hope this helps.

-abu
Do, or do not. There is no 'try'.
Anubhav Dhingra
Frequent Advisor

Re: nPar and iCAP

Hi Abu,

Thanx for the info, I am implementing this right now. However, do i need to deactivate CPUs from EFI as well...
Abu Bakkar Siddik Sarka
Occasional Visitor

Re: nPar and iCAP

Hi Anubhav,
I don't think you got to do anything from EFI. Only thing you got to do is deactive enough cores from nPar0 (icapmodify -d command should be sufficient here, no need to go to EFI for de-activation) so that you have at least 16 core usage rights free to create the new partition.

-abu
Do, or do not. There is no 'try'.
Anubhav Dhingra
Frequent Advisor

Re: nPar and iCAP

Hi Abu,

Thanx it worked,,,
You were faster than,, HP-UX Support Center Team... they are still elevating the case to L2.
Abu Bakkar Siddik Sarka
Occasional Visitor

Re: nPar and iCAP

You are welcome Anubhav and thanks for the nice words. Nice to hear that it worked. The PDF I shared earlier would be helpful in case you end up having any further confusion regarding the iCAP compliance and partition modification related issues in an iCAP environment.

-abu
Do, or do not. There is no 'try'.