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8. Check again, using the lsdev command, to make sure reserve_policy attribute is now set to no_reserve, as shown in Example 4-14. Example 4-14 Output of the hdisk attribute after changing the reserve_policy attribute $ lsdev -dev hdisk6 -attr attribute value description user_settable PR_key_value none Persistant Reserve Key Value True cache_method fast_write Write Caching method False ieee_volname 600A0B80000BDC160000051D451C54AC IEEE Unique volume name False lun_id 0x0003000000000000 Logical Unit Number False max_transfer 0x100000 Maximum TRANSFER Size True prefetch_mult 1 Multiple of blocks to prefetch on read False pvid 00c5e9de0fbcc9210000000000000000 Physical volume identifier False q_type simple Queuing Type False queue_depth 10 Queue Depth True raid_level 5 RAID Level False reassign_to 120 Reassign Timeout value True reserve_policy no_reserve Reserve Policy True rw_timeout 30 Read/Write Timeout value True scsi_id 0x10000 SCSI ID False size 10240 Size in Mbytes False write_cache yes Write Caching enabled False 9. Repeat steps 5 to 7 for hdisk7. 10.For the Fibre Channel adapter, change the attribute fc_err_recov to fast_fail and dyntrk to yes. You can use the lsdev -type adapter command to find the number of the Fibre Channel adapter. Use the chdev command, as shown in Example 4-15. Example 4-15 Changing the attributes of the Fibre Channel adapter $ chdev -dev fscsi0 -attr fc_err_recov=fast_fail dyntrk=yes -perm fscsi0 changed $ lsdev -dev fscsi0 -attr attribute value description user_settable attach switch How this adapter is CONNECTED False dyntrk yes Dynamic Tracking of FC Devices True fc_err_recov fast_fail FC Fabric Event Error RECOVERY Policy True scsi_id 0x10300 Adapter SCSI ID False sw_fc_class 3 FC Class for Fabric True 226 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
Note: The reason for changing the fc_err_recov attribute to fast_fail is that if the Fibre Channel adapter driver detects a link event, such as a lost link between a storage device and a switch, then any new I/O or future retries of the failed I/O operations will be failed immediately by the adapter until the adapter driver detects that the device has rejoined the fabric. The default setting for this attribute is delayed_fail. Setting the dyntrk attribute to yes makes AIX 5L tolerate cabling changes in the SAN. Be aware that this function is not supported on all storage systems. Check with your storage vendor for support. 11.Reboot the Virtual I/O Server for the changes to take effect. You only need to reboot when you change the Fibre Channel attributes. 12.Log on to VIO_Server2. Repeat steps 1 to 10 configure the SEA and either configure the IP interface on the SEA or on a separate virtual Ethernet adapter with the same PVID. In our example, VIO_Server2 has the IP address 9.3.5.112. Double check both Virtual I/O Servers that the vhost adapters have the correct slot numbers by running the lsmap -all command. 13.Ensure that the disks you want to map to the clients have the correct hdisks and LUN numbers on both Virtual I/O Server using the lsdev command, as shown in Example 4-16. 14.Map the hdisk to the vhost adapter using the mkvdev command, as shown in Example 4-16. Example 4-16 Mapping the disks to the vhost adapters $ mkvdev -vdev hdisk6 -vadapter vhost2 -dev app_server app_server Available $ mkvdev -vdev hdisk7 -vadapter vhost3 -dev db_server db_server Available Important: When multiple Virtual I/O Servers attach to the same disk, only hdisk is supported as a backing device. You cannot create a volume group on these disks and use a logical volume as a backing device. Chapter 4. Setting up virtual I/O: advanced 227
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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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Page 220 and 221: SEA Failover works as follows: Two
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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
Page 230 and 231: few cycles to set up, but none for
Page 232 and 233: 4.1.7 Considerations The following
Page 234 and 235: . On step 10, allocate an unused Et
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
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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
Page 260 and 261: 7. On the first LPAR, create an enh
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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
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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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