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The updateios command does not commit the upgrade it is installing, but rather puts it in an applied state. Before the next upgrade can be applied, the previous upgrade needs to be either committed or rejected, which is done with the -commit and -reject flags with the command. In some cases, a reboot of the VIOS partition may be required to complete the upgrade. Other updates may also require the upgrade of the system firmware, which could include an entire system outage for a reboot to complete the firmware upgrade. For an example of how to update the VIOS without affecting client application availability, see 5.4.1, “Concurrent software updates for the VIOS” on page 294. Snap collection for IBM support When contacting IBM support, there are two things you should have ready prior to actually opening a call: ► ► The exact configuration of your system. Run the snap command from the VIOS. The rest of the snap collection proceeds similar to a standard AIX 5L snap command collection. The file produced is the standard snap.pax.Z file, which can be transferred to the IBM support site given to you by your IBM support representative. When the -general flag is used with the snap command, only the general configuration of the system is collected. Without the -general flag, a full system scan is performed and all information, including storage layout, security, install results, network configuration and virtual configurations, are captured in the snap.pax.Z file. Dual Virtual I/O Server considerations With the redundancy of dual Virtual I/O Servers comes the added system maintenance requirement to keep the redundancy working. Just as with HACMP, all changes made to the dual VIOS that are related to providing redundancy to a client partition should be tested. While the strictness of HACMP testing does not need to be followed, testing after major changes or additions should be performed to verify that the redundancy required is actually achieved. Backing up the dual VIOS also requires some thought. When backing up to a optical device, where VIOS maintains control of the DVD, requires some planning, as the client partitions will also use that VIOS for access to the optical device. 314 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
Assigning one VIOS as a client to the other for the DVD is not an option, because as of Virtual I/O Server 1.3 there can be only server SCSI adapters created in a Virtual I/O Server. 5.4.5 Checking and fixing the configuration When using LVM mirroring between disks from two Virtual I/O Servers, a reboot of one Virtual I/O Server makes one disk missing and stale partitions have to be synchronized with the varyonvg command when the server is rebooted. When using NIB for network redundancy, the backup does not fall back to the primary adapter until the backup adapter fails. This holds for virtual adapters and AIX 5L V5.3-ML03 or higher even if Automatically Recover to Main Channel is set to yes due to the fact that no link up event is received during reactivation of the path. This is because virtual Ethernet adapters are always up. If you configure NIB to do load balancing, you may want the NIB to be on the primary channel. If the settings are correct, MPIO will not require any special attention when a Virtual I/O Server is restarted, but a failed path should be checked. Checking and fixing these things in a system with many partitions is time consuming and prone to errors. Figure 5-21 on page 295 is a sample script that you can fit to your needs that will check and fix the configuration for: ► Redundancy with dual Virtual I/O Servers and LVM mirroring ► ► Redundancy with dual Virtual I/O Servers, Fibre Channel SAN disks and AIX MPIO Network redundancy using Network Interface Backup The script should reside on each VIO Client and if using dsh (distributed shell), it should also be located in the same directory on each VIO Client. Since it is local to the VIO Client, it can be customized for the individual client. It could be executed at regular intervals using cron. A better way would be to run the script on all required target partitions in parallel using dsh (distributed shell) from a NIM or admin server after a Virtual I/O Server reboot. Note: The dsh command is installed by default in AIX and is part of CSM. However, use of the full function clustering offered by CSM requires a license. See the AIX 5L documentation for dsh command information. Chapter 5. System management 315
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Front cover Advanced</stron
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Note: Before using this information
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2.1 New features in Version 1.3 of
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4.4.2 Configuration on the Virtual
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6.6.4 Managing memory resources . .
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3-9 Processing sharing mode and the
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5-14 Status window . . . . . . . .
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xiv Advanced <stro
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xvi Advanced <stro
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any form without payment to IBM, fo
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The team that wrote this redbook Th
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xxii Advanced <str
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- Additional information about the
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management” on page 257 discusses
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1.1.5 Virtual LAN 1.1.6 Virtual I/O
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The service processor provides the
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Adapter sparing Adapter sparing can
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1.4.1 IBM AIX 5L for System p5 syst
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Note: i5/OS partitions are only sup
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Function / capability IBM System z9
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1.6 The value of the Advanc
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18 Advanced <stron
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2.1 New features in Version 1.3 of
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► throughput and performance. For
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► IVM enhancements Industry leadi
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Shared Ethernet Adapter failover ca
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the partition. This allows you to c
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Figure 2-2 ASMI menu to enable the
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management interface for systems wi
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When setting up a partition, you ha
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partition with 0.50 processing unit
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processors and the other a single o
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Figure 2-5 shows the usage of the s
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2.4.5 Dynamic partitioning Partitio
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Number of virtual processors In gen
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The benefit of SMT is greatest wher
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Setting SMT mode using SMIT Use the
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The Hypervisor firmware and the hos
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Partition 2 is configured with one
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Note: The Virtual I/O Server suppor
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Most ISVs consider partitions with
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When a partition is running as unca
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► ► ► Selected IBM software p
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Shared pool = 4 CPU Sum EC = 3.0 PU
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For more information about the use
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Table 2-5 Licensing estimation for
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Maximum virtual processors used Cap
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2.8 Virtual and Shared Ethernet int
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► VLAN 2 - Node A-2 - Node B-3 -
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VLAN support in AIX 5L is based on
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2. Tagged port receives a packet ta
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page 78. EtherChannel and Link Aggr
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Note: In this type of configuration
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Figure 2-18 Shared Ethernet Adapter
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Other aspects that have to be taken
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► Only packets for the VLAN speci
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► Packets tagged with a VLAN othe
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► The value proposition enabling
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Figure 2-21 Virtual SCSI architectu
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Figure 2-23 and Figure 2-24 show th
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4. In the Virtual I/O Server, vios1
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The following are the steps to unco
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► ► A logical volume on the Vir
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I/O configuration, performance is a
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Hardware management is done by an H
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VMC allows IVM to provide basic log
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Virtual TTY In order to allow LPAR
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2.13.1 Linux device drivers for IBM
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Mirroring Linux can mirror disks by
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Figure 2-29 Bridging a virtual and
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116 Advanced <stro
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3.1 Getting started This section pr
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lspath mkpath mkvdev mkvt rmdev rmp
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3.1.2 Hardware resources managed Th
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3.2 Creating a Virtual I/O Server p
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3. Enter the partition name and ID
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5. You have the option to change th
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7. Select the Shared check box for
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9. Specify the processing sharing m
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11.Skip setting the I/O pools, as s
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2. Click the Create adapter button
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5. Add a virtual SCSI adapter to vi
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7. Select Normal for your boot mode
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A few seconds after the status wind
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3. Select the VIO_Server1 profile a
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You are now ready to use the newly
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3. Specify the Maximum virtual adap
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You can use the lsmap -all -net com
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2. Select the check box AIX or Linu
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2. Click Create client adapter. The
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4. Click Create server adapter and
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6. When the operation is complete,
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9. When you have completed adding v
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Server SCSI adapters have been adde
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Using logical partitions In our bas
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Note: Based on the lsdev -vpd comma
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It is useful to be able to map the
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Assuming that a NIM master is confi
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3. Set up the NIM master IP address
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3.4.6 Mirroring the Virtual I/O Ser
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Once the interaction between virtua
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Figure 3-45 shows the steps to crea
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Ethernet server adapter and a physi
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4.1 Providing higher serviceability
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Figure 4-1 MPIO and LV Mirroring wi
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Some advanced topics with respect t
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While EC is an Cisco-specific imple
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Alternatives for network high avail
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Figure 4-6 IP multipathing in the c
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SEA Failover works as follows: Two
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Although the alternative configurat
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► With NIB, the two internal netw
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In Figure 4-11 on page 201, a clien
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When Virtual I/O Server 2 returns t
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few cycles to set up, but none for
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4.1.7 Considerations The following
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. On step 10, allocate an unused Et
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7. Check the devices list on your V
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Figure 4-17 shows the intended solu
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. Click the Create Adapter button,
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Tip: Mismatching SEA and SEA Failov
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Checking which SEA is active Checki
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In this scenario, we attach each Vi
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2. Configure the SEA, as described
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5. Check for the vhost adapter usin
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8. Check again, using the lsdev com
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Check the mappings, as shown in Exa
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2. Check the MPIO configuration by
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To determine which path will use th
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7. On the first LPAR, create an enh
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A switch can be forced with the /us
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The configurations described in thi
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We recommend using mirroring, strip
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Supported multi-path configurations
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Supported scenarios using one Virtu
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Supported scenarios using multiple
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4.7.2 Supported Ethernet configurat
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In order to help clients improve th
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Clients can find the fixes and file
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Figure 4-35 shows the basic conside
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256 Advanced <stro
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5.1 Dynamic LPAR operations This se
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5. Figure 5-3 shows you the Virtual
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another partition. Use the lsslot -
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Page 330 and 331: hd3 jfs2 1 2 2 open/syncd /tmp hd1
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Page 354 and 355: 5.5.4 The topas command The topas c
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Page 366 and 367: Note: The variable capacity weight
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Page 370 and 371: The sysstat command The sysstat com
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Page 374 and 375: 5.5.7 Monitoring with PLM The Parti
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Page 378 and 379: Using the r and p switches after st
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Network option extendednetstats (ex
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Enable unsecure daemons (disrmtdmns
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Minimum number of chars (mindiffhls
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370 Advanced <stro
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6.1 Partition Load Manager introduc
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Notes: ► The PLM server may resid
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When PLM is notified that a partiti
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6.1.4 Memory management PLM manages
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However, the managed nodes know not
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sh and rcp During its installation,
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2. Create a toc file with the inuto
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. Append the PLM server public key
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You can set up the RMC using a scri
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Define a PLM policy as follows: 1.
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Table 6-2 CPU-related tunables CPU
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Memory tunables Table 6-4 shows the
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1. Start the Web-based System Manag
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4. Complete the information in the
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. Fill out the values for the tunab
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8. Specify the CPU resource policy
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Clicking the OK button will create
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. From the Web-based System Manager
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2. Click the Groups tab, and then t
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Figure 6-21 Edit Policy File partit
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The policy_file and log_file parame
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In its short form, the xlplm -Q com
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6.3 Point-in-time and recurring rec
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Select the type of operation you wi
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6.4 Tips and troubleshooting PLM Th
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Note: Exchanging keys is an importa
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The Identity entry is either based
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120200c10d3ad7a20951523b7c01bd31f42
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► ► PLM does not directly state
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6.6 Resource management Owners of I
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Characteristics of WLM, PLM, and sh
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Evaluating CPU utilization Traditio
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Shared-processor partitions support
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438 Advanced <stro
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FDX FLOP FRU FTP GDPS GID GPFS GUI
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442 Advanced <stro
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Other publications These publicatio
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► ► ► ► Virtual I/O Server
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cfgdev command 163, 203, 264 cfgmgr
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excess weight, PLM 376 extendlv com
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Micro-Partitioning 3, 32-33 49 capp
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processor dispatch 43, 50 processor
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VIO 59 virtual processor 61 mainten
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target 90, 92 virtual SCSI Server a
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Back cover Advanced</strong
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