Advanced POWER Virtualization on IBM System p5 - Previous ...

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Setting SMT mode using SMIT Use the smitty smt fast path to access the SMIT SMT control panel. From the main SMIT panel, the selection sequence is Performance & Resource Scheduling → Simultaneous Multi-Threading Mode → Change SMT Mode. Figure 2-7 shows the SMIT SMT panel. Figure 2-7 SMIT SMT panel with options SMT performance monitor and tuning AIX 5L Version 5.3 includes commands or extended options to existing commands for the monitoring and tuning of system parameters in SMT mode. SMT monitoring The SMT behavior requires the operating system to provide statistics on the use of the particular logical processors. The mpstat command is used to display performance statistics for all logical processors operating in the logical partition. The mpstat command is described in “Logical processor tools” on page 326. 2.5.3 SMT control in Linux To enable or disable SMT at boot, use the following boot option at the boot prompt: boot: linux smt-enabled=on Change the on to off to disable SMT at boot time. The default is SMT on. 48 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
2.6 Introduction to the <strong>POWER</strong> Hypervisor The <strong>POWER</strong> Hypervisor is the foundation of the IBM <strong>Virtualization</strong> Engine system technologies implemented in the <strong>POWER</strong>5 processor-based family of products. Combined with features designed into the <strong>POWER</strong>5 processor, the <strong>POWER</strong> Hypervisor delivers functions that enable other system technologies including Micro-Partitioning, virtual processors, IEEE VLAN compatible virtual switch, virtual SCSI adapters, and virtual consoles. The <strong>POWER</strong> Hypervisor is a firmware layer sitting between the hosted operating systems and the server hardware, as shown in Figure 2-8. The <strong>POWER</strong> Hypervisor is always installed and activated, regardless of system configuration. The Hypervisor has no processor resources assigned to it. The <strong>POWER</strong> Hypervisor performs the following tasks: ► Enforces partition integrity by providing a security layer between logical partitions. ► Provides an abstraction layer between the physical hardware resources and the logical partitions using them. It controls the dispatch of virtual processors to physical processors. It saves and restores all processor state information during logical processor context switch. ► Controls hardware I/O interrupts management facilities for logical partitions. Virtual and physical resources Partition MEM MEM I/O SLOT I/O SLOT I/O SLOT Partition I/O SLOT MEM I/O SLOT MEM MEM Partition I/O SLOT I/O SLOT I/O SLOT P5 P5 P5 P5 P5 P5 P5 <strong>POWER</strong> Hypevisor MEM MEM <strong>POWER</strong>5 <strong>POWER</strong>5 <strong>POWER</strong>5 Server hardware resources <strong>POWER</strong>5 MEM MEM MEM I/O SLOT I/O SLOT I/O SLOT I/O SLOT I/O SLOT Figure 2-8 The <strong>POWER</strong> Hypervisor abstracts the physical server hardware Chapter 2. <strong>Virtualization</strong> technologies on System p servers 49
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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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Page 26 and 27: - Additional information about the
Page 28 and 29: management” on page 257 discusses
Page 30 and 31: 1.1.5 Virtual LAN 1.1.6 Virtual I/O
Page 32 and 33: The service processor provides the
Page 34 and 35: Adapter sparing Adapter sparing can
Page 36 and 37: 1.4.1 IBM AIX 5L for System p5 syst
Page 38 and 39: Note: i5/OS partitions are only sup
Page 40 and 41: Function / capability IBM System z9
Page 42 and 43: 1.6 The value of the Advanc
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Page 46 and 47: 2.1 New features in Version 1.3 of
Page 48 and 49: ► throughput and performance. For
Page 50 and 51: ► IVM enhancements Industry leadi
Page 52 and 53: Shared Ethernet Adapter failover ca
Page 54 and 55: the partition. This allows you to c
Page 56 and 57: Figure 2-2 ASMI menu to enable the
Page 58 and 59: management interface for systems wi
Page 60 and 61: When setting up a partition, you ha
Page 62 and 63: partition with 0.50 processing unit
Page 64 and 65: processors and the other a single o
Page 66 and 67: Figure 2-5 shows the usage of the s
Page 68 and 69: 2.4.5 Dynamic partitioning Partitio
Page 70 and 71: Number of virtual processors In gen
Page 72 and 73: The benefit of SMT is greatest wher
Page 76 and 77: The Hypervisor firmware and the hos
Page 78 and 79: Partition 2 is configured with one
Page 80 and 81: Note: The Virtual I/O Server suppor
Page 82 and 83: Most ISVs consider partitions with
Page 84 and 85: When a partition is running as unca
Page 86 and 87: ► ► ► 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
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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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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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