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Figure 3-45 shows the steps to create new virtual SCSI server and client adapters and define the initial storage resources for an AIX 5L client partition. Steps to enable Virtual SCSI services for AIX or Linux clients 1. In HMC: Create the Virtual SCSI adapter in the VIOS profile 2. Install or re-activate the VIOS with the updated profile (or use DLPAR) 3. In VIOS shell: Create storage resource (logical volume, disk drive or optical device) to be mapped to the AIX client partition 4. In VIOS shell: Map storage resource to the AIX client partition with mkvdev command 5. In HMC: Create the Virtual SCSI adapter in the AIX or Linux client partition profile 6. Install or re-activate the AIX or Linux client partition with the updated profile (or use DLPAR) Figure 3-45 Steps to enable virtual SCSI service to an AIX 5L client partition Virtual SCSI services for AIX 5L partitions AIX 5L client partitions can use virtual SCSI devices currently mapped from the Virtual I/O Server once the operating system starts up or the system is reconfigured with the cfgmgr or mkdev commands. Mapped disk-type resources (physical volumes or logical volumes in the VIOS scope) appear on the AIX 5L client partition as an hdisk type of device (for example, hdisk0, hdisk1). The virtual SCSI client adapter can use these devices like any other physically connected hdisk device for boot, swap, mirror, or any other supported AIX 5L feature. Optical-type resources (DVD-ROM and DVD-RAM) appear as a CD type of device (for example, cd0). 178 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
Virtual SCSI services for Linux partitions The configuration for Linux partitions to allow them to use virtual SCSI adapters and devices is similar to the configuration for AIX 5L partitions. Linux partitions handle virtual SCSI devices as SCSI disc drives. Clients should be aware about the following considerations in the Linux client partitions: ► ► Virtual SCSI adapters in the Linux client partition are listed in the /sys/class/scsi_host directory; such a directory contains the control files for each of the virtual adapters. The virtual SCSI client adapters can be requested to re-scan for virtual SCSI resources recently mapped from the VIOS using the same interfaces as any other SCSI adapter. Virtual SCSI disk drives in the Linux client partition can be seen in the device tree as an sdx type of device (for example, sda). Note that Linux shows in the device tree both virtual disk drives (virtual SCSI storage resources mapped from VIOS) and disk partitions created inside those virtual disk drives. 3.5.2 Virtual Ethernet resources The second type of resource that causes interaction between AIX 5L or Linux client partitions and the Virtual I/O Server is the Shared Ethernet Adapter in the Virtual I/O Server. This feature allows the AIX 5L partitions to connect to external networks without a physical adapter. The implementation of virtual Ethernet adapters is based on the definition of network interfaces that connect through the <strong>POWER</strong> Hypervisor to an IEEE VLAN-aware virtual Ethernet switch in the system. All partitions talking on the virtual Ethernet network are peers. Up to 4,096 separate IEEE VLANs can be defined in the system. Each partition can have up to 65,533 virtual Ethernet adapters connected to the virtual Ethernet switch and each adapter can be connected to 21 different IEEE VLANs (20 VID and 1 PVID). For more information about the technical details of virtual Ethernet implementation, refer to 2.8, “Virtual and Shared Ethernet introduction” on page 70. The enablement and setup of a virtual Ethernet adapter in an AIX 5L or Linux client partition does not require any special hardware or software. After a specific virtual Ethernet is enabled for a partition, a network device is created within the partition. The user can then set up the TCP/IP configuration appropriately to communicate with other partitions. In order to allow the AIX 5L or Linux client partition to communicate with external Ethernet networks, the Virtual I/O Server acts like a bridge and forwards the IP packets from the virtual Ethernet client adapter. This is done by creating a Shared Ethernet Adapter (SEA) in the Virtual I/O Server that connects the virtual Chapter 3. Setting up the Virtual I/O Server: the basics 179
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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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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
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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
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Page 184 and 185: 6. When the operation is complete,
Page 186 and 187: 9. When you have completed adding v
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Page 190 and 191: Using logical partitions In our bas
Page 192 and 193: Note: Based on the lsdev -vpd comma
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Page 196 and 197: Assuming that a NIM master is confi
Page 198 and 199: 3. Set up the NIM master IP address
Page 200 and 201: 3.4.6 Mirroring the Virtual I/O Ser
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Page 208 and 209: 4.1 Providing higher serviceability
Page 210 and 211: Figure 4-1 MPIO and LV Mirroring wi
Page 212 and 213: Some advanced topics with respect t
Page 214 and 215: While EC is an Cisco-specific imple
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Page 218 and 219: Figure 4-6 IP multipathing in the c
Page 220 and 221: SEA Failover works as follows: Two
Page 222 and 223: Although the alternative configurat
Page 224 and 225: ► With NIB, the two internal netw
Page 226 and 227: In Figure 4-11 on page 201, a clien
Page 228 and 229: When Virtual I/O Server 2 returns t
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Page 236 and 237: 7. Check the devices list on your V
Page 238 and 239: Figure 4-17 shows the intended solu
Page 240 and 241: . Click the Create Adapter button,
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Page 244 and 245: Checking which SEA is active Checki
Page 246 and 247: In this scenario, we attach each Vi
Page 248 and 249: 2. Configure the SEA, as described
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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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