AIX 6. This article also provides some basic rules of thumb to help you decide which virtualization method is most appropriate for you and walks you through the steps to create your first WPAR. What are WPARs? This means that you must have AIX 6.
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Or, conversely, if you had some free resources you wanted to share to another server, there was no easy way of doing it short of physically moving hardware components. With several more iterations of LPAR technology, it became possible to dynamically manage resources and micropartition processor resources, letting multiple LPARs share even the same physical processor simultaneously.
This software comes bundled and is managed independent of the usual operating system commands for example, installp and versioning structure technology levels. It is similar to how HMCs have specialized software loaded onto a Linux kernel for a specific purpose.
This user ID has a shell called the IOS command-line interface ioscli that runs a unique set of commands for managing devices assigned to the VIO servers. Many of these commands are similar to regular AIX commands for example, lsdev but use different flags and command structures for example, lsdev —dev. But, most of the superuser level commands are new and perform many different operations at once.
In fact, when administered properly, systems administrators will rarely have to become root. Helpful padmin commands include: help: This command lists all of the commands available in the ioscli.
If you pass a specific command into it, such as help updateios, you can see the specific flags and syntax for that command. Again, you will rarely have to become root on a VIO server. Planning your environment As you begin to plan your VIO environment, a successful, fully functioning and highly available VIO environment is directly proportional to the amount of time you invest in checking your hardware, designing some handy spreadsheets, and focusing on the details.
Within VIO, you use three main methods to serve up disk resources: Method 1: Logical volumes as disks. This method requires assigning a disk to a VIO server and using the padmin user ID to create a volume group and logical volumes LVs on that disk.
If there is sufficient free space on the disk, you can create an additional LV on the fly and assign it quickly. Benefits: This method is a quick and easy way of getting disks out to VIO client LPARs; it takes only two short commands to get a disk detected and out the door to a server for use. Drawbacks: Managing a massive quantity of disks on VIO servers and the clients to which they are mapped can become tricky.
Also, if you ever have to boot into System Management Services SMS , it can take a long time for the VIO server to probe all the disks, and it may identify several as being root volume groups the trick is to look for the VIO name. Benefits: This method is an extremely elegant way to manage VIO disk resources and simplifies the process of mapping disks. And, even the VIO servers can have IP addresses configured onto the SEAs for communication, bypassing the need for any sort of specialized administrative network connection.
If virtual LAN VLAN trunking is available, where multiple network subnets can be accessed simultaneously through the same physical adapter, this method does not use that benefit.
The communication to multiple subnets occurs seamlessly. Benefits: IVE cuts down on the number of physical Ethernet adapters and connections needed to facilitate communications. It becomes possible to send traffic to production, development, and backup networks all through the same piece of wire.
The resources that you assign to each VIO server should be as close to identical as possible and designed to maximize availability. Do not mix a slower speed Ethernet adapter on one VIO server with a faster speed one on another. Instead, stagger the adapters between multiple drawers and assign them independently. Plan out every possible hardware failure and look for ways to maximize redundancy. In addition, it is especially important to document how everything is mapped out.
Record your environment in a spreadsheet and cross-reference it often with the output of commands like vfcmap. Figure 1. Confirm that advanced power virtualization is available: In the HMC, select your managed system.
Click Properties. Select the check box to open a terminal screen. Let the server install the IOS on your hard disk. Set up the password, licensing, patching, and mirroring: When the VIO server is up, log in with the padmin user ID and set its password.
If prompted, run the license —accept command to confirm the software licensing. If you have an update for the server, use the updateios command to install any patches. Mirror the root volume group with the mirrorios command, if applicable. Reboot the VIO server with the shutdown —restart command.
Clone the server: Back up the server with the backupios command and use that image to build your redundant VIO server I prefer the ease of NIM for this task. For the main virtual adapter, select the Access External Network check box. Set different trunk priority numbers between the two VIO servers. Repeat the same process for a control channel adapter for redundancy, but do not select the Access External Network check box. Save your changes, then boot from this profile.
Check your device list with the lsdev command. Check the attributes of the virtual Ethernet adapters with the lsdev —dev entX —attr command to confirm which adapters are which.
A ping test will quickly confirm whether you have set up everything correctly. Click the Virtual Adapters tab. Enter the slot numbers from your spreadsheet. Examine them with the lspv and lsdev —dev hdiskX —attr commands. Examine the vhosts on the server with the lsmap —all command. From this point, the installation follows a standard AIX server installation. Conclusion VIO technology can help you use resources more effectively, cut down on hardware costs, and consolidate servers in new and powerful ways.
This article provided the background and basics on how to make a simple VIO environment work, but the best way to fully understand all the concepts is to put them into practice and set up and configure some servers on your own. The one piece of advice I leave you with is to plan, document, and test everything before putting it into production.
It will be worth it. Christian Pruett.
logical partition (LPAR)
With the subset of HMC server functionality, IVM provides a solution that enables the administrator to quickly set up a system. It is a firmware layer sitting between the hosted operating systems and the server hardware, and it is always activated. It delivers functions that enable capabilities: dedicated or micro partitioning, virtual processors, virtual ethernet- scsi- fibre channel- adapters and virtual consoles. The minimum processor allocation for an LPAR is one 1 whole processor, and can be as many as the total number of installed processors in the server. Each processor is wholly dedicated to the LPAR.
LPAR BASICS PDF
LPAR - logical partitioning
Gardagrel Join to subscribe now. Java Llpar, Part 1 Java is a high-level programming language. CBU stands for capacity backup upgrade. Each CPU can be individually assigned to a logical partition.