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

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management interface for systems without an HMC. This <strong>POWER</strong>5 partition is not intended to run end-user applications or for user login. For each Partition Load Manager V1.1 (5765-G31) license ordered, an order for either the one-year (5771-PLM) or three-year (5773-PLM) Software Maintenance (SWMA) must also be submitted. The software maintenance for the Partition Load Manager is priced on a per processor basis, by processor group. Partition Load Manager for AIX 5L helps clients to maximize the utilization of processor and memory resources on the IBM System p platform that support dynamic logical partitioning. Within the constraints of a user-defined policy, resources are automatically moved to partitions with a high demand, from partitions with a lower demand. Resources that would otherwise go unused can now be more fully utilized. 2.4 Micro-Partitioning introduction Micro-Partitioning is the ability to divide a physical processor’s computing power into fractions of a processing unit and share them among multiple logical partitions. Obtaining and entering an activation code for most IBM System p models is optional, except for the p5-590 and p5-595 models, where it is included automatically in the configuration. The benefit of Micro-Partitioning is that it allows increased overall utilization of CPU resources within the managed system. Better granularity of CPU allocation in a logical partition means efficient use of processing power. This section discusses the following topics about Micro-Partitioning: ► Shared processor partitions ► Shared processor pool overview ► Capacity Upgrade on Demand ► Dynamic processor de-allocation and processor sparing ► Dynamic partitioning ► Shared processor considerations 2.4.1 Shared processor partitions The virtualization of physical processors in <strong>POWER</strong>5 systems introduces an abstraction layer that is implemented within the hardware microcode. From an operating system perspective, a virtual processor is the same as a physical processor. 32 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
The key benefit of implementing partitioning in the hardware allows any operating system to run on <strong>POWER</strong>5 technology with little or no changes. Optionally, for optimal performance, the operating system can be enhanced to exploit shared processor pools more in-depth, for example, by voluntarily relinquishing CPU cycles to the hardware when they are not needed. AIX 5L Version 5.3 is the first version of AIX 5L that includes such enhancements. Micro-Partitioning allows multiple partitions to share one physical processor. Logical partitions using Micro-Partitioning technology are referred to as shared processor partitions. A partition may be defined with a processor capacity as small as .10 processor units. This represents 1/10 of a physical processor. Each processor can be shared by up to 10 shared processor partitions. The shared processor partitions are dispatched and time-sliced on the physical processors under control of the <strong>POWER</strong> Hypervisor. Micro-Partitioning is supported across the entire <strong>POWER</strong>5 product line from entry level to the high-end systems. Table 2-2 shows the maximum number of logical partitions and shared processor partitions supported on the different models. Table 2-2 Micro-Partitioning overview Server/Model 505/510/ 520/52A 550 55A 570 575 590 595 Processors 2 4 8 16 16 32 64 Dedicated processor 2 4 8 16 16 32 64 partitions Shared processor partitions 20 40 80 160 160 254 254 It is important to point out that the maximums stated are supported by the hardware, but the practical limits based on production workload demands may be significantly lower. Shared processor partitions still need dedicated memory, but the partitions I/O requirements can be supported through virtual Ethernet and virtual SCSI. Utilizing all virtualization features, up to 254 shared processor partitions is currently supported. The shared processor partitions are created and managed by the HMC. When you start creating a partition, you have to choose between a shared processor partition and a dedicated processor partition. Chapter 2. <strong>Virtualization</strong> technologies on System p servers 33
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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
Page 8 and 9: 4.4.2 Configuration on the Virtual
Page 10 and 11: 6.6.4 Managing memory resources . .
Page 12 and 13: 3-9 Processing sharing mode and the
Page 14 and 15: 5-14 Status window . . . . . . . .
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Page 20 and 21: any form without payment to IBM, fo
Page 22 and 23: 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
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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
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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 60 and 61: When setting up a partition, you ha
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Page 66 and 67: Figure 2-5 shows the usage of the s
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Page 72 and 73: The benefit of SMT is greatest wher
Page 74 and 75: Setting SMT mode using SMIT Use the
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
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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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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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