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We recommend using mirroring, striping, or concatenation of physical disks using the LVM in the VIO client, or to use such features of special RAID-capable host bus adapters or storage subsystems with the Virtual I/O Server. Thus, to provide redundancy for the backed disk, a hardware RAID 5 array on the Virtual I/O Server can be used. Figure 4-25 shows the Virtual I/O Server configured with a SCSI RAID adapter. At the time of writing, the following adapters are supported: ► PCI-X Dual Channel Ultra320 SCSI RAID Adapter (FC 5703) ► Dual Channel SCSI RAID Enablement Card (FC 5709) Virtual I/O Server 1 Backed device: logical volume AIX client partition lv LVM vscsi target device vtscsi0 LVM raid adapter Server SCSI adapter vhost0 hdisk0 rootvg Client SCSI adapter vscsi0 <strong>POWER</strong> Hypervisor internal SCSI disks RAID Array – RAID5 Figure 4-25 RAID5 configuration using a RAID adapter on the Virtual I/O Server Attention: Only RAID hardware is supported for this configuration. After creating a RAID 5 array, it will appear as one hdisk on the Virtual I/O Server. You can then divide the large disk into logical volumes and map them to your client partitions. 240 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
When using this configuration we recommend that you plan for two additional disks for the installation of the Virtual I/O Server that should be mirrored over two disks. Otherwise, the logical volumes you map to the client partition will be created in the rootvg of the Virtual I/O Server. Important: Do not use the Virtual I/O Server rootvg for logical volumes that will be used as virtual disks for the clients. When planning for multiple Virtual I/O Servers, Figure 4-26 shows the supported and recommended way for mirroring the virtual disks on the client partitions. Note: One Virtual I/O Server is supported on the Integrated <strong>Virtualization</strong> Manager (IVM). Use the HMC to manage more than one Virtual I/O Server. IBM supports up to ten Virtual I/O Servers within a single CEC managed by an HMC. Though architecturally up to 254 LPARS are supported, more than ten Virtual I/O Server LPARs within a single CEC has not been tested and therefore is not recommended. Either configure a logical volume on each Virtual I/O Server and map it to the vhost adapter that is assigned to the same client partition or directly map a hdisk to the appropriate vhost adapter. The mapped logical volume or hdisk will be configured as a hdisk on the client side, each belonging to a different Virtual I/O Server. Then use LVM mirroring on the client site. Virtual I/O Server 1 Backed device: hdisk or logical volume AIX client partition Virtual I/O Server 2 Backed device: hdisk or logical volume LVM vscsi target device vtscsi0 LVM mirroring vscsi target device vtscsi0 LVM Phy.adapter Server SCSI adapter vhost0 hdisk0 rootvg Client SCSI adapter vscsi0 hdisk1 rootvg Client SCSI adapter vscsi1 Server SCSI adapter vhost0 Phy.adapter <strong>POWER</strong> Hypervisor Internal SCSI disks SAN attached disks Internal SCSI disks SAN attached disks Figure 4-26 Recommended way to mirror virtual disks with two Virtual I/O Server Chapter 4. Setting up virtual I/O: advanced 241
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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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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
Page 250 and 251: 5. Check for the vhost adapter usin
Page 252 and 253: 8. Check again, using the lsdev com
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Page 256 and 257: 2. Check the MPIO configuration by
Page 258 and 259: To determine which path will use th
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Page 276 and 277: In order to help clients improve th
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Page 280 and 281: Figure 4-35 shows the basic conside
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Page 284 and 285: 5.1 Dynamic LPAR operations This se
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Page 292 and 293: 5.1.3 Add memory dynamically in AIX
Page 294 and 295: 5.1.4 Removing memory dynamically T
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Page 298 and 299: 2. Figure 5-17 shows the current pr
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Page 302 and 303: 1. Use the diagmenu command to unco
Page 304 and 305: 5. Locate the blinking adapter, rep
Page 306 and 307: ► Figure 5-19 shows you the topol
Page 308 and 309: Example 5-4 shows how to back up th
Page 310 and 311: Example 5-6 Creating a Virtual I/O
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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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