HP Integrity Superdome SX2000 HP-UX 11i v3 Dynamic nPartitions - Features and
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- HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 1
Rollout of Dynamic nPartitions functionality in HP-UX 11i v3 9 Dynamic nPartitions, virtual partitions, and Integrity Virtual Machines 9 Requirement to reset Workload Manager 9 Integration with instant capacity...9 Interaction with processor sets ...10 Cell reset recovery time...10 Summary...10 - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 2
Cell migration...14 Transcript of cell migration operation 15 What could possibly go wrong?...19 Glossary ...20 Cell-based HP servers and Dynamic nPartitions 21 For more information...22 - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 3
to be possible, an nPartition must be running HP-UX 11i Update 1 and its supporting firmware, and that nPartition must contain a cell in the inactive state. Upon completion of the cell online activation operation, the processor and memory resources on the activated cell are available for use by the - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 4
designated as a floating cell. Any cell not specifically designated as a floating cell is a base cell. HP-UX before 11i v3 included support for base cells only. A base cell cannot be online deactivated. The system administrator designates a cell as a base cell or floating cell using the nPartition - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 5
power cycle sequence of the associated cell before the I/O chassis can be activated again. For more information, see the manual cells are in the system complex. A two-cell server reconciling financial accounts at the end of the month, while another are likely when supporting retail operations, or - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 6
cabinet. This would allow components on the cell board or the entire cell board to be replaced. The replacement capability enables hardware maintenance to be performed, for example, if predictive diagnostics indicated that a certain memory DIMM or processor module was likely to fail and should be - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 7
configure each partition with a sufficient number of base cells, or, more specifically, a sufficient amount of memory on base cells to meet the operating system requirements. The following table describes the rule for the total amount of physical memory present in the partition as compared to the - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 8
cells. Floating cells used to satisfy demand for CPU and memory resources do not need an I/O chassis attached. Any I/O attached to a floating cell A cell online to perform cell online activation to a cell online deactivation delete a cell from a partition with a high memory utilization level - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 9
will be available with HP-UX 11i v3 Update 1. HP-UX 11i v3 will run successfully on servers that predate the release of the update. However, the new Dynamic nPartitions operations will not be functional unless the firmware on the server is upgraded to the firmware that supports the new features. The - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 10
not be reactivated nor assigned to another partition. During the reset recovery time, parstatus shows the state of the cell as "Powering on". Summary Dynamic nPartitions operations complete the value proposition of partitionable server complexes. Vast flexibility can be realized through changing the - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 11
2 does not have associated I/O, the migration sequence begins with the command parolrad -d 2 This command, entered in a terminal session on HP-UX instance 0, causes HP-UX to stop using all resources on cell 2, and it causes the cell to be reset. The new state of the complex is shown in Figure 3: 11 - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 12
management capabilities of the nPartition commands. Instead, the following commands are entered into a terminal session on HP-UX instance 1. Cell 2 is unassigned, and once the cell reset operation triggered by the previous online deactivation has completed, it can be assigned to partition 1 with - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 13
Figure 6. HP-UX instance 0 HP-UX instance 1 nPartition 0 nPartition 1 cell 0 cell 1 cell 2 cell 3 cell 4 cell 5 cell 6 cell 7 base cell float cell float cell float cell base cell base cell base cell base cell Now, the sequence is complete: cell 2 is fully integrated into HP-UX instance 1. Both - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 14
do not support online instance number reassignment. Cell migration Here is the command sequence to migrate the cell in slot S from partition p to partition q. It is assumed that the target cell is a floating cell and it does not have an I/O chassis. (If it did have active I/O, the instructions above - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 15
Detailed CRA report is available in /var/adm/cra.log file. Activity : End of Chassis-Delete operation. Ok to go ahead with the OnLine De-activation of the Cell. Hardware path : 2 [par1]# parolrad -d 2 Note: Cell Online deactivation operation has been initiated. The sequence number is: 2 Note - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 16
its power on reset sequence and is in the "Inactive" state. The demonstration system was not configured for remote invocation of parolrad, so the remaining commands are issued in partition 0. [par0]# parstatus -C [Cell] CPU Memory Use OK/ (GB) Core On Hardware Actual Deconf/ OK/ Cell Next - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 17
special file for MPT instance 14 SCSI port at hardware path, 2/0/0/3/1, configured. Installing special file for MPT instance 15 [par0]# parstatus -C [Cell] CPU Memory Use OK/ (GB) Core On Hardware Actual Deconf/ OK/ Cell Next Par Location Usage Max Deconf Connected To Capable - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 18
cab0,cell2 Active Float 8/0/8 8.0/0.0 cab8,bay0,chassis0 yes cab0,cell3 Active Base 8/0/8 8.0/0.0 cab8,bay0,chassis1 yes Notes: * = Cell has no interleaved memory. [par0]# /locinfo2 --- System wide locality info: --- index ldom physid type total free 0 0 0 CLM 3.93G 3.36G 1 1 3 CLM 3. - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 19
table gives some troubleshooting hints. Message The cell shall be assigned to the local (target) nPar. The cell Install the DynamicNPars product from HP-UX 11i v3 Update 1. Use the vPars processor and memory migration facilities instead of parolrad. Upgrade the system firmware on all cells - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 20
are active cells whose resources (processors, memory, and any attached I/O) can be actively used by software running in the nPartition. Cells that are Physical cell insertion refers to the insertion of a cell board into a previously vacant cell slot in a server complex. The inserted cell becomes - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 21
support HP-UX 11i v3 Dynamic nPartitions operations: Cell capacity Two-cell Servers Four-cell Servers HP 9000 Superdome Servers HP Integrity Superdome Servers Server model HP 9000 rp7420 Server HP 9000 rp7440 Server HP Integrity rx7620 Server HP Integrity rx7640 Server HP 9000 rp8420 Server HP - HP Integrity Superdome SX2000 | HP-UX 11i v3 Dynamic nPartitions - Features and - Page 22
.com/en/SFWM1/index.html for the firmware versions to support Dynamic nPartitions. © 2008 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements
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HP-UX 11i v3 Dynamic nPartitions
Features and configuration recommendations
Table of Contents
Introduction
...................................................................................................................................
3
nPartitions Background
....................................................................................................................
3
Dynamic nPartitions operations
.........................................................................................................
3
Cell online activation
...................................................................................................................
3
Cell online deactivation
................................................................................................................
3
Base cells and floating cells
..........................................................................................................
4
Dynamic nPartitions commands
.........................................................................................................
4
I/O chassis
................................................................................................................................
4
Scenarios for Dynamic nPartitions
......................................................................................................
5
Adding capacity to an nPartition
....................................................................................................
5
Shifting floating capacity to meet demand peaks
..............................................................................
5
Temporary removal of a partition
...................................................................................................
6
Replacement of hardware
.............................................................................................................
6
Configuration recommendations for Dynamic nPartitions
........................................................................
7
Minimum amount of memory on base cells
......................................................................................
7
I/O chassis
................................................................................................................................
8
Duration of Dynamic nPartitions operations
......................................................................................
8
Sensitivity to operating system workload
.........................................................................................
8
Current limits and conditions
.............................................................................................................
9
Rollout of Dynamic nPartitions functionality in HP-UX 11i v3
................................................................
9
Dynamic nPartitions, virtual partitions, and Integrity Virtual Machines
...................................................
9
Requirement to reset Workload Manager
........................................................................................
9
Integration with instant capacity
.....................................................................................................
9
Interaction with processor sets
.....................................................................................................
10
Cell reset recovery time
..............................................................................................................
10
Summary
.....................................................................................................................................
10
Illustrated example of online cell migration
........................................................................................
11
Command sequences for Dynamic nPartitions scenarios
......................................................................
14
Cell replacement
.......................................................................................................................
14