Home > Articles

  • Print
  • + Share This
This chapter is from the book

Example nPartition Management Scenario

The remainder of this chapter walks through an example management scenario that covers the nPartition management tasks involved with an HP nPartition server hardware upgrade. This example scenario does not cover the process of installing the physical resources; this is typically performed by an HP field engineer. Instead, the purpose of this example is to illustrate the nPartition management applications with a practical example.

The initial configuration of the complex is shown in Table 4-4. The HP nPartition server used in this scenario is an rx8620 with two cells. The two cells are contained in a single nPartition which is named rex01. There are two I/O chassis in the server and both are in use by the rex01 nPartition.

Table 4-4. Initial Complex Configuration

nPartition Name

Cells

I/O Chassis

rex01

cab0, cell0

cab0, bay0, chassis0

 

cab0, cell1

cab0, bay0, chassis1

Table 4-5 shows the configuration of the complex after the hardware upgrade scenario is complete. Two new cells will be added to the server, and an I/O expansion cabinet containing two I/O chassis will also be part of the upgrade. Notice that the rex01 nPartition is extended with a portion of the newly added hardware and an additional nPartition, rex02, is created with the remaining hardware resources.

Table 4-5. Final Complex Configuration

nPartition Name

Cells

I/O Chassis

rex01

cab0, cell0

cab0, bay0, chassis0

 

cab0, cell1

cab0, bay0, chassis1

 

cab0, cell2

cab8, bay0, chassis0

rex02

cab0, cell3

cab8, bay0, chassis1

Viewing the Configuration of an nPartition Complex

The first step in performing the hardware upgrade is viewing the current configuration of the complex. There are three primary mechanisms for viewing the configuration of an HP nPartition server:

  • the MP console's command menu
  • the nPartition commands
  • the Partition Manager graphical user interface.

Each of these mechanisms exposes the SCCD and PCD data in slightly different ways. The MP's interface provides high-level information about the configuration of the complex and very detailed information about the status of the hardware components. The nPartition command-line interfaces provide textual output such as that shown in Listing 4-2 and Listing 4-3. Finally, the Partition Manager GUI provides graphical views of the system configuration and status. While all three of these mechanisms can be used to view the configuration of an nPartition complex, Partition Manager will be used in this example.

The Partition Manager screen shown in Figure 4-6 is the first screen displayed in Partition Manager when the tool is started. This view shows a hardware representation of the complex, rex complex, along with the nPartition configuration and the status of the components. This screen shows the complex configuration as documented in Table 4-4. A single nPartition, rex01, contains two cells. Each of the cells is connected to an I/O chassis. The rex01 nPartition is active, as indicated by icons next to each of the hardware components. It is also evident that cell slots 2 and 3 are empty. Cells will be added to each of these empty slots as part of this example scenario.

04fig06.gif

Figure 4-6 Partition Manager Hardware View

Partition Manager color-codes the nPartitions and assigned hardware resources to assist in distinguishing resource assignment. In addition to color-coding, each hardware resource has a small icon with a number indicating nPartition assignment. In this example, rex01 is assigned nPartition id 0 (zero); therefore, the circle next to the resources assigned to the nPartition contains a zero. Available or empty cell and I/O chassis slots contain an "A" in the circle to indicate the resource is not assigned to any nPartition and is therefore available.

Figure 4-7 shows another view of the rex complex, this time focusing on a detailed view of the cells. This view is available by selecting the "cells" tab at the top of the screen. The upper portion of the page provides several tables with summary information for the cells, CPUs, and memory in the complex. From the cells table it is clear there are two active cells and two absent cells. The two absent cell slots will be populated with new hardware in this scenario.

04fig07.jpg

Figure 4-7 Partition Manager Cell View

In addition to the summary tables, each CPU, including multi-core CPUs, is shown, as is the status of each CPU. Every DIMM is shown with its size and status. The label alongside the DIMM slot is the actual silk-screen label found on the physical cell board. Should any CPU or DIMM be deconfigured or failed, this screen provides vital information in the process of troubleshooting and physical repair because an administrator can quickly determine the problem area.

Viewing the Complex after Installing Hardware

From the analysis performed, it's clear the new cells should be added into cell slots 2 and 3. Additionally, there are no empty I/O chassis slots, so an I/O expansion cabinet must be installed in order to configure additional nPartitions. The I/O expansion cabinet is required because every nPartition requires at least one cell that is connected to an I/O chassis and that chassis must contain a core I/O card.

For the purposes of this example, assume the new hardware has now been installed and power has been enabled. Figure 4-8 shows the state of the complex with the new hardware installed. Cell slots 2 and 3 now contain cells that are inactive. They are each physically connected to an I/O chassis in the I/O expansion cabinet with an ID of eight.

04fig08.jpg

Figure 4-8 Partition Manager View after Hardware Upgrade

Extending the Existing nPartition

The first step in the process of putting the new hardware resources to use is to extend the rex01 partition. Notice in Figure 4-8 that the checkbox next to the rex01 partition is selected. From the actions menu on the left-hand side, the Modify nPartition task under the nPartition portion of the menu is selected. This task provides an interface to modify attributes for the nPartition such as the cells assigned to the nPartition and the nPartition name.

The Modify nPartition screen is shown in Figure 4-9. Notice the checkbox next to cell 2 has been selected indicating it should be added to the rex01 nPartition. Other settings for the nPartition, such as cell local memory, core cell choices, and the name of the nPartition could also be changed from this dialog by selecting the other tabs. For the purposes of this example, only the new cell will be added.

04fig09.jpg

Figure 4-9 Partition Manager Modify nPartition Screen

When the OK button is pressed in the Modify nPartition dialog, the Modify nPartition Finish dialog, Figure 4-10, is displayed. This dialog provides a list of notes and warnings, a summary of the changes which will be performed to the complex, and a list of advisory high availability (HA) checks.

04fig10.jpg

Figure 4-10 Partition Manager Modify nPartition Finish Dialog

The Command Preview immediately below the buttons provides the exact command that could be executed to perform the requested changes. This is especially useful for administrators who prefer using the command-line interface but have yet to master the various command-line arguments and options.

The command parmodify is used to modify nPartitions. Of particular interest in the command are the –h and –g command-line arguments. These options are required when using the nPartition management paradigm presented in Figure 4-5 for using remote management via the MP. This is required because the nPartition configuration privilege was set to "restricted" in Listing 4-1. As described earlier, this setting prevents changes to the SCCD data structure such as assigning cells to an nPartition. Pressing the OK button will result in Partition Manager executing the command shown in the Command Preview, which will assign cell 2 to the rex01 nPartition, which has the nPartition ID of 0 (zero).

Creating a new nPartition

The rex01 partition is now extended to the desired size, as shown in Table 4-5. The final configuration task associated with the hardware upgrade is to create the new nPartition, rex02. Figure 4-11 shows the rex complex with the changes made thus far. Notice that cell 2 and the attached I/O chassis 0/0 are assigned to rex01, but they are not active (as indicated by the icon next to the cell). Cell 3 and I/O chassis 8/0/1 are both available and will be used to create the new nPartition rex02.

04fig11.jpg

Figure 4-11 Partition Manager Hardware View before Creating Second nPartition

The Create nPartition link is selected from the nPartition portion of the actions menu, which opens the Create nPartition wizard. The first step in creating an nPartition is to set the name. In this example, the name of the nPartition is rex02. The second step is to select the cells that will be assigned to the nPartition shown in the Create nPartition Select Cells screen in Figure 4-12. This screen allows simple point-and-click selection of the cells to be assigned to the nPartition. In this example, the only cell available is cell 3, so it is selected with a checkbox next to the cell.

04fig12.jpg

Figure 4-12 Partition Manager Create nPartition Dialog: Select Cells Page

Subsequent steps in the Create nPartition wizard are similar to the options available in the Modify nPartition dialog. Setting the core cell choice, configuring cell local memory, and other options are all available in the wizard. Before performing the requested changes to the complex, consult the summary pages Partition Manager provides, which give detailed information regarding the nPartition that will be created. The final step in the process of creating an nPartition is the Finish page, show in Figure 4-13. As with the Modify nPartition task, the Command Preview is presented. Once again, remote management via IPMI over LAN is being utilized, as is evident by the –h and –g command-line options.

04fig13.gif

Figure 4-13 Partition Manager Create nPartition Dialog: Finish Page

The changes to the rex complex are now complete. The rex01 nPartition has been extended to include the newly added cell 2 and I/O chassis 8/0/0. The rex02 nPartition has been created using the remaining new hardware resources, cell 3 and I/O chassis 8/0/1. Figure 4-14 shows the final configuration of the complex. Notice, however, that the newly added resources are inactive, as shown by the icon next to each hardware component. Rebooting the rex01 nPartition and booting the rex02 nPartition are the final steps in this example scenario.

04fig14.jpg

Figure 4-14 Partition Manager Hardware View after Complex Reconfiguration

Rebooting and Booting nPartitions

The complex configuration tasks related to the hardware upgrade are complete. However, the new resources are not usable for workloads. The rex01 nPartition must be rebooted and the rex02 nPartition must be booted in order for the new hardware to be usable. Before jumping into the process of rebooting and booting nPartitions, a discussion of the states of cells is warranted to clarify the process of configuration an HP nPartition server.

As shown in Figure 4-15, there are four cell states. When cells are not physically installed, the nPartition management tools refer to the cells as absent. After initially installing a cell, it will be in the Powered-Off state. Enabling power to the cell causes the cell to go through a series of power-on self-tests. These tests ensure that the CPUs, memory, I/O, and other hardware entities are functioning appropriately. After the power-on self-test sequence, a cell stops at the "Inactive" state; this is also known as the Boot Is Blocked (BIB) or Boot Inhibit Bit (BIB) state. Cells 2 and 3 are Inactive, or at BIB, in Figure 4-14. The final cell state is the "Active" state. This is the state that will most commonly be observed on production systems, as only active cells are able to run operating systems and workloads. Cells 0 and 1 are Active in Figure 4-14.

04fig15.gif

Figure 4-15 HP nPartition Server Cell State Diagram

While it is possible to make changes to a complex when cells are in the Active state, it is generally not the recommended approach. Every cell contains a copy of the SCCD data structure that mirrors the copy contained in the MP. When changes are made to the SCCD affecting an active cell, the change cannot be pushed out to any cells until the affected cell becomes inactive. Therefore, a Pending SCCD data structure results. This Pending SCCD will persist until the affected cell becomes inactive, which could be an indefinite amount of time. In addition, no other changes can be made to the SCCD data structure until the change is pushed out. In some cases it is necessary to make changes to the SCCD that affect an active cell, and in those cases, it is recommended that the nPartition be rebooted as soon as possible to minimize the amount of time the Pending SCCD data structure persists. The addition of cell 2 to the rex01 nPartition did not create a Pending SCCD because the only affected cell, cell 2, was inactive when the change was made. Therefore, the copy of the SCCD for cell 2 was pushed out immediately. Similarly, when the rex02 nPartition was created, only cell 3 was affected, and it was inactive when the nPartition was created.

The state of an nPartition is related to the cell states shown in Figure 4-15; when one or more assigned cells are in the active state, then the nPartition is said to be active. Otherwise, the nPartition is inactive.

The rex01 nPartition must be rebooted for reconfiguration in order for cell 2 to communicate with the other cells in the nPartition and become active. The HP-UX operating system requires special command-line options when rebooting the operating system in order for complex configuration changes to take effect. The –R option is required for both the shutdown and reboot commands on HP-UX. This requirement is shown in the Notes and Warnings section of Figure 4-10. If rex01 were running Microsoft Windows or Linux, a normal reboot would result in activation of cell 2 and the original two cells. The difference in behavior on HP-UX allows an administrator to alter the SCCD but have finer control over exactly when the changes to the SCCD take effect. A normal HP-UX shutdown or reboot command with the –R option omitted reboots the operating system without activating the newly added hardware in the nPartition.

Finally, rex02 must be booted by using the MP's command menu. The boot, bo, command boots the nPartition, releasing the cell from BIB and allowing it to become active. The cell proceeds to either the BCH firmware interface on a cell that contains PA-RISC processors or to the Extensible Firmware Interface (EFI) on a cell that contains Intel Itanium Processor Family (IPF) processors. From the firmware interface, an operating system can be installed and then workloads can be started.

Figure 4-16 shows the final hardware view of the complex after the upgrading the hardware, reconfiguring the complex, rebooting rex01, and booting rex02.

04fig16.jpg

Figure 4-16 Partition Manager Hardware View after Hardware Upgrade Complete

  • + Share This
  • 🔖 Save To Your Account

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020