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

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The sysstat command The sysstat command tells you briefly about the overall performance of the system and displays user sessions. Example 5-41 shows the syntax. Example 5-41 Usage message of the sysstat command $ sysstat -h Usage: sysstat [-long | -short] [user] Prints a summary of current system activity. -long Prints the summary in long form. This is the default. -short Prints the time of day, amount of time since last system startup, number of users logged on, and number of processes running. Example 5-42 provides an example output of the sysstat command. Example 5-42 Example output of the sysstat command $ sysstat -long 03:29PM up 1:20, 2 users, load average: 0.51, 0.56, 0.50 User tty login@ idle JCPU PCPU what padmin vty0 02:09PM 22 1 0 -rksh padmin pts/0 02:16PM 0 0 0 -rksh The viostat command The viostat command can be very helpful in tracing system activity with regard to questions related to I/O. It allows for relatively fine-grained measurements of different type of adapters and attached disks as well as the usage of paths to redundant attached disks, including virtual adapters and virtual disks as well as their backing devices. The usage message of this command is shown below in Example 5-43 Example 5-43 Usage message of the viostat command $ viostat -h Usage: viostat [-sys] [-adapter] [-disk | -extdisk | -tty] [-path] [-time] [PhysicalVolume...] [Interval [Count]] viostat Reports Central Processing Unit statistics, asynchronous input/output, input/output statistics for entire system, adapters, tty devices, disks and CD-ROMs. -sys A system-header row is displayed followed by a line of statistics for the entire system. The hostname of 344 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
the system is printed in the system-header row. -adapter -disk -extdisk -path -tty -time An adapter-header row is displayed followed by a line of statistics for the adapter. This will be followed by a disk-header row and the statistics of all the disks/CD-ROMs connected to the adapter. A disk-header row is displayed followed by a line of statistics for each disk that is configured. If the PhysicalVolume parameter is specified, then only that PhysicalVolume statistics is displayed. The -disk, -extdisk and -tty flags are exclusive. A disk-header row is displayed followed by detailed statistics for each disk that is configured. If the PhysicalVolume parameter is specified, then only that PhysicalVolume statistics is displayed. The -disk, -extdisk and -tty flags are exclusive. Displays the throughput for all paths to that device followed by the throughput for that device. Display the statistics for the tty and cpu usage. The -disk, -extdisk and -tty flags are exclusive. Prints the time-stamp next to each line of output of viostat. The time-stamp displays in the HH:MM:SS format. The viostat command resembles the iostat command available in AIX 5L and is of comparable use to spot hot I/O paths and drill down to the related components. Here is the output of a measurement while disk I/O on one client with a virtual disk occurred. Example 5-44 shows the command output Example 5-44 The viostat command output $ viostat -extdisk System configuration: lcpu=4 drives=7 paths=0 vdisks=9 dac0 xfer: %tm_act bps tps bread bwrtn 0.0 374.8K 3.5 17.3K 357.4K read: rps avgserv minserv maxserv timeouts fails 1.2 5.2 0.5 5.7S 0 0 write: wps avgserv minserv maxserv timeouts fails 2.4 47.0 2.0 34.6S 0 0 queue: avgtime mintime maxtime avgwqsz avgsqsz sqfull 5.0 0.0 15.4S 0.0 0.0 0 hdisk0 xfer: %tm_act bps tps bread bwrtn 0.9 4.8K 0.6 3.3K 1.5K read: rps avgserv minserv maxserv timeouts fails 0.3 6.2 0.5 269.4 0 0 Chapter 5. System management 345
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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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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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Page 348 and 349: Traditional performance measurement
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Page 354 and 355: 5.5.4 The topas command The topas c
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Page 366 and 367: Note: The variable capacity weight
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Page 374 and 375: 5.5.7 Monitoring with PLM The Parti
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Page 398 and 399: 6.1 Partition Load Manager introduc
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Page 418 and 419: 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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