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

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Clients can find the fixes and filesets for AIX 5L and HACMP at: http://techsupport.services.ibm.com/server/vios/download/home.html The fixpack for the Virtual I/O Server can be found at: http://www.ibm.com/servers/eserver/support/pseries/aixfixes.html HACMP and virtual SCSI The volume group must be defined as Enhanced Concurrent Mode. In general, Enhanced Concurrent Mode is the recommended mode for sharing volume groups in HACMP clusters because volumes are accessible by multiple HACMP nodes, resulting in faster failover in the event of a node failure. If file systems are used on the standby nodes, they are not mounted until the point of failover, because the volume groups are in full active read/write mode only on the home node; the standby nodes have the volume groups in passive mode, which does not allow access to the logical volumes or file systems. If shared volumes (raw logical volumes) are accessed directly in Enhanced Concurrent Mode, these volumes are accessible from multiple nodes, so access must be controlled at a higher layer, such as databases. If any cluster node accesses shared volumes through virtual SCSI, all nodes must do so. This means that disks cannot be shared between a partition using virtual SCSI and a server or partition directly accessing those disks. All volume group construction and maintenance on these shared disks is done from the HACMP nodes using C-SPOC, not from the Virtual I/O Server. Note: Partitions using virtual I/O cannot be mixed in an HACMP cluster with partitions using dedicated adapters accessing the same shared disks. HACMP and virtual Ethernet IP Address Takeover (IPAT) through aliasing must be used. IPAT using replacement and MAC Address Takeover are not supported. In general, IPAT using aliasing is recommended for all HACMP networks that can support it. All virtual Ethernet interfaces defined to HACMP should be treated as single-adapter networks. In particular, configure the file netmon.cf to include a list of clients to ping. It must be used to monitor and detect failure of the network interfaces. Due to nature of virtual Ethernet, other mechanisms to detect the failure of network interfaces are not effective. If the Virtual I/O Server has only a single physical interface on a network (instead of, for example, two interfaces with Ethernet aggregation), then a failure of that 252 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
physical interface will be detected by HACMP on the AIX 5L client partition. However, that failure will isolate the node from the network. So we recommend, in this case, a second virtual Ethernet on the AIX 5L client partition. There are several ways to configure AIX 5L client partitions and Virtual I/O Server resources for additional high availability with HACMP. We recommend using two Virtual I/O Servers. This configuration also allows online service for Virtual I/O with improved uptime for user applications. In Figure 4-34, there is an example of a HACMP cluster between two AIX 5L client partitions. Sserver p5 system HACMP cluster Sserver p5 system LPAR X HACMP / AIX 5L AIX S B Data LPAR Y HACMP / AIX 5L AIX S B Data LPAR Z <strong>POWER</strong> Hypervisor <strong>POWER</strong> Hypervisor VIOS A VIOS B VIOS C LAN LAN SAN SAN Disk heartbeat Data External shared storage Figure 4-34 Example of HACMP cluster between two AIX 5L client partitions Chapter 4. Setting up virtual I/O: advanced 253
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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
Page 228 and 229: When Virtual I/O Server 2 returns t
Page 230 and 231: few cycles to set up, but none for
Page 232 and 233: 4.1.7 Considerations The following
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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,
Page 242 and 243: Tip: Mismatching SEA and SEA Failov
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
Page 254 and 255: Check the mappings, as shown in Exa
Page 256 and 257: 2. Check the MPIO configuration by
Page 258 and 259: To determine which path will use th
Page 260 and 261: 7. On the first LPAR, create an enh
Page 262 and 263: A switch can be forced with the /us
Page 264 and 265: The configurations described in thi
Page 266 and 267: We recommend using mirroring, strip
Page 268 and 269: Supported multi-path configurations
Page 270 and 271: Supported scenarios using one Virtu
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Page 276 and 277: In order to help clients improve th
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
Page 286 and 287: 5. Figure 5-3 shows you the Virtual
Page 288 and 289: another partition. Use the lsslot -
Page 290 and 291: 2. Select the adapter to be moved a
Page 292 and 293: 5.1.3 Add memory dynamically in AIX
Page 294 and 295: 5.1.4 Removing memory dynamically T
Page 296 and 297: The following command shows the eff
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
Page 312 and 313: 5.2.5 Restoring the Virtual I/O Ser
Page 314 and 315: For an AIX 5L NIM server recovery,
Page 316 and 317: To view the System Plan, Select Sys
Page 318 and 319: In Example 5-11, we look to the map
Page 320 and 321: The last information we need is the
Page 322 and 323: In a mirrored environment, issue th
Page 324 and 325: Figure 5-23 shows that the virtual
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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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