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Mirroring Linux can mirror disks by use of the RAID-Tools. Thus, for redundancy, you may mirror each virtual disk provided by one Virtual I/O Server to another virtual disk provided by a different Virtual I/O Server. Attention: Be aware that using Linux’s RAID-Tools to mirror the boot- and root-partitions, and enabling the Linux system to boot from mirrored disks, may require modification of the default boot scheme. Remember that mirroring could also be implemented in the Virtual I/O Server to provide redundant access to external disks for the VIO client. But implementing mirroring in the Virtual I/O Server instead of the VIO client would not provide the same degree of high availability to the VIO client, because the VIO client would have to be shut down when the single Virtual I/O Server were brought down, for example, when the Virtual I/O Server is upgraded. The difference between mirroring in the VIO client and in the Virtual I/O Server is shown in Figure 2-28. Note: Currently LVM mirroring of virtual disks on the APV Virtual I/O Server is not recommended. Figure 2-28 Implementing Mirroring in the VIO client or VIO server LVM The Linux OS Logical Volume Manager can use any mix of virtual and physical disks. 112 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
Attention: Be aware that using Linux’s LVM for the root-partition, and enabling the Linux system to boot with the root file system on a logical volume, may require modification of the default boot scheme. 2.13.3 Linux as a VIO server Linux can also provide some of the virtualization services to other Linux partitions that the IBM System p5 APV VIOS typically provides to AIX 5L and Linux partitions. Consideration: The Linux VIO Server is not supported by AIX 5L. For VIO clients running AIX 5L, only the APV VIOS is supported. Ethernet Bridging To provide layer-2 bridging functionality on Linux, for example, between virtual and physical Ethernet adapters, bridging functionality must have been enabled at kernel build-time. The bridge-utils RPM must be installed to make the brctl command available, which is used to set up and configure a bridge. The ipfilt command can be used to restrict access. Bridging between a physical and a virtual Ethernet adapter with Linux is shown in Figure 2-29 on page 114. Note that the IP-address for the bridging Linux partition is defined on br0, not on eth0, which is now member of the bridge. Routing Linux can act as a router to external networks, too. IP-forwarding has to be enabled. The ipfilt command can be used to restrict access. Chapter 2. <strong>Virtualization</strong> technologies on System p servers 113
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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
Page 88 and 89: Shared pool = 4 CPU Sum EC = 3.0 PU
Page 90 and 91: For more information about the use
Page 92 and 93: Table 2-5 Licensing estimation for
Page 94 and 95: Maximum virtual processors used Cap
Page 96 and 97: 2.8 Virtual and Shared Ethernet int
Page 98 and 99: ► VLAN 2 - Node A-2 - Node B-3 -
Page 100 and 101: VLAN support in AIX 5L is based on
Page 102 and 103: 2. Tagged port receives a packet ta
Page 104 and 105: page 78. EtherChannel and Link Aggr
Page 106 and 107: Note: In this type of configuration
Page 108 and 109: Figure 2-18 Shared Ethernet Adapter
Page 110 and 111: Other aspects that have to be taken
Page 112 and 113: ► Only packets for the VLAN speci
Page 114 and 115: ► Packets tagged with a VLAN othe
Page 116 and 117: ► The value proposition enabling
Page 118 and 119: Figure 2-21 Virtual SCSI architectu
Page 120 and 121: Figure 2-23 and Figure 2-24 show th
Page 122 and 123: 4. In the Virtual I/O Server, vios1
Page 124 and 125: The following are the steps to unco
Page 126 and 127: ► ► A logical volume on the Vir
Page 128 and 129: I/O configuration, performance is a
Page 130 and 131: Hardware management is done by an H
Page 132 and 133: VMC allows IVM to provide basic log
Page 134 and 135: Virtual TTY In order to allow LPAR
Page 136 and 137: 2.13.1 Linux device drivers for IBM
Page 140 and 141: Figure 2-29 Bridging a virtual and
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Page 144 and 145: 3.1 Getting started This section pr
Page 146 and 147: lspath mkpath mkvdev mkvt rmdev rmp
Page 148 and 149: 3.1.2 Hardware resources managed Th
Page 150 and 151: 3.2 Creating a Virtual I/O Server p
Page 152 and 153: 3. Enter the partition name and ID
Page 154 and 155: 5. You have the option to change th
Page 156 and 157: 7. Select the Shared check box for
Page 158 and 159: 9. Specify the processing sharing m
Page 160 and 161: 11.Skip setting the I/O pools, as s
Page 162 and 163: 2. Click the Create adapter button
Page 164 and 165: 5. Add a virtual SCSI adapter to vi
Page 166 and 167: 7. Select Normal for your boot mode
Page 168 and 169: A few seconds after the status wind
Page 170 and 171: 3. Select the VIO_Server1 profile a
Page 172 and 173: You are now ready to use the newly
Page 174 and 175: 3. Specify the Maximum virtual adap
Page 176 and 177: You can use the lsmap -all -net com
Page 178 and 179: 2. Select the check box AIX or Linu
Page 180 and 181: 2. Click Create client adapter. The
Page 182 and 183: 4. Click Create server adapter and
Page 184 and 185: 6. When the operation is complete,
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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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2. Select the adapter to be moved a
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5.1.3 Add memory dynamically in AIX
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5.1.4 Removing memory dynamically T
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The following command shows the eff
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2. Figure 5-17 shows the current pr
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et1 Defined 01-09 IEEE 802.3 Ethern
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1. Use the diagmenu command to unco
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5. Locate the blinking adapter, rep
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► Figure 5-19 shows you the topol
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Example 5-4 shows how to back up th
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Example 5-6 Creating a Virtual I/O
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5.2.5 Restoring the Virtual I/O Ser
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For an AIX 5L NIM server recovery,
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To view the System Plan, Select Sys
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In Example 5-11, we look to the map
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The last information we need is the
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In a mirrored environment, issue th
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Figure 5-23 shows that the virtual
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csm.diagnostics 1.5.0.0 # Cluster S
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os.txt.spell 5.3.0.10 # Writer's To
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hd3 jfs2 1 2 2 open/syncd /tmp hd1
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Adding a PCI hot plug adapter The t
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The following is a list of empty SC
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After the disk is replaced and brou
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2. Get a larger disk from the Virtu
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The updateios command does not comm
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Note: You can use dsh based on rsh,
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2 Checking if Redundancy with dual
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STATUS=`lspath -l $n | grep Failed
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Traditional performance measurement
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CPU statistics in shared-processors
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This is shown in Example 5-22 and E
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5.5.4 The topas command The topas c
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capped, and uncapped. The Mem and t
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Tip: The output of topas -cecdisp w
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These files can now be processed wi
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interval and count parameters. The
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The lparstat command POWER<
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Note: The variable capacity weight
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Column Measured parameter Comments
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The sysstat command The sysstat com
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write: wps avgserv minserv maxserv
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5.5.7 Monitoring with PLM The Parti
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Use the perfwb command to start the
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Using the r and p switches after st
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The nmon process runs in the backgr
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The POWER Hypervis
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5.7 Security considerations for Vir
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The firewall can be switched on and
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Enable mail client (dismaildmndls):
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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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