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Partition Manager Help

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  Actions  |  Create nPartition  |  Configure Memory   

Configure Memory

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» Memory Configuration Options
» Enable Hyper-Threading
» Complete This Step
» Messages

This is step 4 of the create nPartition wizard. In this step you specify how the memory in the nPartition's cells should be allocated between interleaved memory and cell local memory (CLM).

In this step you also specify whether Hyper-Threading is enabled for the nPartition, if its cells have processors that support Hyper-Threading.

Cell local memory is only supported on nPartitions running HP-UX 11i v2 (B.11.23), SuSE Linux Enterprise Server 9, or Microsoft® Windows®. If an nPartition is booted under an operating system that does not support CLM, any memory allocated as CLM will be unusable.

For an overview of the entire create nPartition wizard, refer to the parent help topic, create nPartition. For a guide to nPartition configuration requirements and recommendations, refer to the configuration guide.

Memory Configuration Options

The Available Memory table shows the total memory and bootable memory in the nPartition.

Table 1 Available Memory

Total Memory from Base Cells (GB) The total amount of memory configured on all of the cells in the nPartition.
Available Memory on Next Boot (GB) The total amount of memory configured on all of the cells that are configured to boot in the nPartition (the “Use On Next Boot” flag is set to “Yes”).
Min. Interleave Required by HP-UX (GB)

Only Displayed for PA-RISC nPartitions.  For an explanation of this value, refer to the HP-UX requires ... message explained below.

 

The following fields are provided for configuring the memory in this nPartition.

Table 2 Cell Local Memory (CLM) Allocations

Hardware Location

The physical location of the cell (cabinet and cell slot). To examine the details of this cell, you can click on the value in this field. A new browser window will display the cell properties view. This shows the same information as the cell scope views. Inside this new browser window, you can switch between the General, CPUs and Memory, and I/O tabs, but you cannot navigate outside the cell scope. Close the new browser window when you have finished examining the cell properties.

Cell Type

Always set to Base. Other cell types may be introduced in future releases.

Use On Next Boot

When this field is set to “No”, the cell will be inactive the next time the nPartition is booted. The memory on cells with this flag set to “No” will not be counted in the Available On Next Boot total at the bottom of this table, or in the Available Memory on Next Boot field in the Available Memory table above.

Total Memory OK (GB)

The total amount of memory configured for use on the cell, in gigabytes.

Requested CLM

The amount of cell memory that should be requested as CLM. This value can be entered in one of two ways.

Fraction Select a fraction of the total amount of memory available. The drop-down list is in increments of “1/4 (25%)” for cells with less than 4 GB capacity, or “1/8 (12.5%)” for cells with 4 GB capacity or more.

Fixed Enter the actual amount of memory to be used as CLM. The value that you specify will be rounded to the nearest 0.5 GB. If you enter an amount greater than the total amount of memory available, it will be rounded down to the total amount available.

Requested Interleave (GB)

The amount of cell memory that was requested as interleaved memory, in gigabytes. This is the Total Memory OK minus the Requested CLM.

 

Enable Hyper-Threading

To enable Hyper-Threading for an nPartition whose processors support it, select the Enable Hyper-Threading check box. This check box is displayed only for nPartitions with processors whose cores support multiple parallel execution streams (such as dual-core Intel® Itanium® 2 processors). Enabled means that Hyper-Threading will be active on the next reboot of the nPartition. Active means that each processor core in the nPartition is simultaneously running multiple threads.

Complete This Step

The buttons at the bottom of the page are used to move through the steps of the wizard.

Avoid using your browser's “Back” and “Forward” buttons in Partition Manager (except in the online help). When you use these buttons, Partition Manager cannot tell that you have changed to a different view. This can cause problems, including incorrectly displaying which objects are selected in the current view. Instead, use the links and navigation buttons provided by Partition Manager.

If you do use your browser's “Back” or “Forward” buttons, you can refresh the displayed data by clicking the Partition Manager [Refresh] button at the top right of the window, or by selecting the ToolsRefresh Data action from the actions menu.

[< Back]

Go back to the previous step. You can keep clicking [< Back] until you return to the start of the wizard, or resume from any previous step. Once you go back to a previous step, any steps ahead of that will need to be completed again, in the proper sequence.

[Next >]

Accept the information provided in this step, and proceed to the next step. From there, you can use the [< Back] button to return to this step, if you decide to change the information entered here.

[Cancel]

Exit this wizard without completing this step or any further steps. Any information provided so far will be discarded.

[Help]

Display help on this step of the wizard, using a new browser window.

Messages

When you click [Next >], one or more of the following messages may be displayed.


 

HP-UX requires at least ... GB of interleaved memory to boot in a PA-RISC nPartition with ... GB of total memory. Reduce the amount of CLM configured on cells in this partition to increase the amount of interleaved memory.

HP-UX cannot boot on a PA-RISC nPartition without a minimum amount of interleaved memory. The minimum required is based on the total memory installed on the cells that are configured to boot in the nPartition.

minimum interleave =
    1.5 GB
  + 0.5 GB per 16 GB bootable memory
           (or fraction thereof)

As an example, an nPartition consisting of a single cell with 2.0 GB of memory cannot have any cell local memory configured. Any nPartition with 16 GB or less of total bootable memory will require 2.0 GB of interleaved memory in order to boot HP-UX.

You will not be able to boot HP-UX on this nPartition as configured. You will have to increase the amount of interleaved memory to the minimum required (or higher) by reducing the amount of CLM.



The amount of interleaved memory, along with the number of base cells in this nPartition, will not yield an optimal interleaved memory configuration. The rules for an optimal interleaved memory configuration are:

...

The performance of memory interleave on this nPartition can be improved by following the rules displayed in the message. Depending on the configuration of your server and the number of desired nPartitions, it may not be possible to provide each nPartition with an optimal interleave. For more information, refer to the configuration guide.

Click [OK] to keep this memory configuration and continue with the next step of the create nPartition wizard.

Click [Cancel] to return to this step and change the memory configuration.



System firmware requires this nPartition have at least 0.5 GB of interleaved memory. If you continue, system firmware will adjust the actual memory configuration to reserve the required minimum amount of interleaved memory when the nPartition is booted.

Click [OK] to continue. The memory configuration that you specified will be changed when the nPartition is booted, in order to provide the minimum amount of interleaved memory required by system firmware.

Click [Cancel] to return to this step and change the memory configuration.