IBM SG24-5131-00 Manuale Utente

SG24-5131-00International Technical Support Organizationhttp://www.redbooks.ibm.comIBM Certification Study GuideAIX HACMP David Thiessen, Achim Rehor

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82 IBM Certification Study Guide AIX HACMP3.4.1 Creating Shared VGsThe following sections contain information about creating non-concurrent VGs and

Cluster Hardware and Software Preparation 83Creating a Concurrent Access Volume Group on Serial DiskSubsystemsTo use a concurrent access volume group

84 IBM Certification Study Guide AIX HACMPUse the smit mkvg fastpath to create a shared volume group. Use the default field values unless your site

Cluster Hardware and Software Preparation 85the journaled file system log (jfslog) is a logical volume that requires a unique name in the cluster.To

86 IBM Certification Study Guide AIX HACMPThat is, you enter this command for each disk. In the resulting display, locate the line for the logical v

Cluster Hardware and Software Preparation 87The TaskGuide uses a graphical interface to guide you through the steps of adding nodes to an existing vo

88 IBM Certification Study Guide AIX HACMP3.4.4.4 Varying Off the Volume Group on the Destination NodesUse the varyoffvg command to deactivate the

Cluster Hardware and Software Preparation 89command succeeds. If exactly half the copies are available, as with two of four, quorum is not achieved a

90 IBM Certification Study Guide AIX HACMPForcing a VaryonA volume group with quorum disabled and one or more physical volumes unavailable can be “f

Cluster Hardware and Software Preparation 91conflict with the cluster’s configuration. Online help panels give additional information to aid in each

© Copyright IBM Corp. 1999 ixFigures1. Basic SSA Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172. Hot-St

92 IBM Certification Study Guide AIX HACMP

© Copyright IBM Corp. 1999 93Chapter 4. HACMP Installation and Cluster DefinitionThis chapter describes issues concerning the actual installation of

94 IBM Certification Study Guide AIX HACMPcluster.base.server.utils HACMP Base Server Utilities • cluster.cspocThis component includes all of the c

HACMP Installation and Cluster Definition 95 • cluster.vsmThe Visual Systems Management Fileset contains Icons and bitmaps for the graphical Managem

96 IBM Certification Study Guide AIX HACMPThis fileset contains the Application Heart Beat Daemon, Oracle Parallel Server is an application that mak

HACMP Installation and Cluster Definition 97HACMP software to HACMP for AIX, Version 4.3. The comments on upgrading the Operating System are not incl

98 IBM Certification Study Guide AIX HACMPInstall HACMP 4.3 for AIX on Node A5. After upgrading AIX and verifying that the disks are correctly confi

HACMP Installation and Cluster Definition 99file on Node A using the following command:/usr/sbin/cluster/utilities/cllsif -x >> /.rhostsThis co

100 IBM Certification Study Guide AIX HACMP2. If you wish to save your cluster configuration, see the chapter Saving and Restoring Cluster Configura

HACMP Installation and Cluster Definition 101 • The network modulesYou define the cluster topology by entering information about each component into

x IBM Certification Study Guide AIX HACMP

102 IBM Certification Study Guide AIX HACMPAdding or Changing a Node Name after the Initial ConfigurationIf you want to add or change a node name af

HACMP Installation and Cluster Definition 103Network Name Enter an ASCII text string that identifies the network. The network name can include alphab

104 IBM Certification Study Guide AIX HACMPAdapter Identifier Enter the IP address in dotted decimal format or a device file name. IP address inform

HACMP Installation and Cluster Definition 105Adding or Changing Adapters after the Initial ConfigurationIf you want to change the information about a

106 IBM Certification Study Guide AIX HACMP •SLIP • SP Switch •ATMIt is highly unlikely that you will add or remove a network module. For informa

HACMP Installation and Cluster Definition 107configuration. If the cluster manager is active on some other cluster nodes but not on the local node, t

108 IBM Certification Study Guide AIX HACMP4.3 Defining ResourcesThe HACMP for AIX software provides a highly available environment by identifying

HACMP Installation and Cluster Definition 1094.3.1.1 Configuring Resources for Resource GroupsOnce you have defined resource groups, you further con

110 IBM Certification Study Guide AIX HACMPThese settings also have to be synchronized throughout the cluster. Therefore Synchronize Cluster Resourc

HACMP Installation and Cluster Definition 111as the path locations for start and stop scripts for the application. These scripts have to be in the sa

© Copyright IBM Corp. 1999 xiTables1. AIX Version 4 HACMP Installation and Implementation . . . . . . . . . . . . . . . 42. AIX Version 4 HACMP Syste

112 IBM Certification Study Guide AIX HACMP4.4.2 Initial StartupAt this point in time, the cluster is not yet started. So the cluster manager has t

HACMP Installation and Cluster Definition 113For cascading resource groups the failed node is going to reaquire its resources, once it is up and runn

114 IBM Certification Study Guide AIX HACMPEssentially, a snapshot saves all the ODM classes HACMP has generated during its configuration. It does n

HACMP Installation and Cluster Definition 115

116 IBM Certification Study Guide AIX HACMP

© Copyright IBM Corp. 1999 117Chapter 5. Cluster CustomizationWithin an HACMP for AIX cluster, there are several things that are customizable. The fo

118 IBM Certification Study Guide AIX HACMPacquire_service_addr (If configured for IP address takeover.) Configures boot addresses to the correspond

Cluster Customization 119event occurs only after a node_up_remote event has successfully completed.Sequence of node_down Eventsnode_down This event o

120 IBM Certification Study Guide AIX HACMPnode_down_local_completeInstructs the Cluster Manager to exit when the local node has left the cluster. T

Cluster Customization 121no actions since appropriate actions depend on the local network configuration.5.1.1.3 Network Adapter Eventsswap_adapter T

xii IBM Certification Study Guide AIX HACMP

122 IBM Certification Study Guide AIX HACMPreconfig_resource_completeThis event indicates that a cluster resource dynamic reconfiguration has comple

Cluster Customization 123For example, a file system cannot be unmounted, because of a process running on it. Then, you might want to kill that proces

124 IBM Certification Study Guide AIX HACMPEach time an error is logged in the system error log, the error notification daemon determines if the err

Cluster Customization 125The failure rate of networks varies, depending on their characteristics. For example, for an Ethernet, the normal failure de

126 IBM Certification Study Guide AIX HACMPTo prevent problems with NFS file systems in an HACMP cluster, make sure that each shared volume group ha

Cluster Customization 127Figure 14. NFS Cross MountsWhen Node A fails, Node B uses the cl_nfskill utility to close open files in Node A:/afs, unmoun

128 IBM Certification Study Guide AIX HACMP • Ensure that node name and the service adapter label are the same on each node in the clusteror • Ali

Cluster Customization 129######## Add for NFS Lock Removal (start) ################ Add for NFS Lock Removal (finish) ###############################

130 IBM Certification Study Guide AIX HACMPfi/bin/rm -f /etc/sm.bak/$host /bin/rm -f /etc/sm/$host /bin/rm -f /etc/statefi######## Add for NFS Lock

© Copyright IBM Corp. 1999 131Chapter 6. Cluster TestingBefore you start to test the HACMP configuration, you need to guarantee that your cluster nod

xiiiPrefaceThe AIX and RS/6000 Certifications offered through the Professional Certification Program from IBM are designed to validate the skills re

132 IBM Certification Study Guide AIX HACMP6.1.2 System Parameters • Type date on all nodes to check that all the nodes in the cluster are running

Cluster Testing 133 • Check that all interfaces communicate (ping <ip-address> or ping -R <ip-address>). • List the arp table entries w

134 IBM Certification Study Guide AIX HACMP • Verify the cluster configuration by running /usr/sbin/cluster/diag/clconfig -v ’-tr’. • To show clus

Cluster Testing 135 • Use ifconfig to swap the service address back to the original service interface back (ifconfig en1 down). This will cause the

136 IBM Certification Study Guide AIX HACMP • Generate the switch error in the error log which is being monitored by HACMP Error Notification (for

Cluster Testing 137 • Verify that all sharedvg file systems and paging spaces are accessible (df -k and lsps -a).6.2.2 Node Failure / Reintegration

138 IBM Certification Study Guide AIX HACMP • Verify that failover has occurred (netstat -i and ping for networks, lsvg -o and vi of a test file fo

Cluster Testing 139 • Monitor the cluster log files on NodeT. • Disconnect the network cable from the appropriate service and all the standby inter

140 IBM Certification Study Guide AIX HACMP • Reconnect hdisk0, close the casing, and turn the key to normal mode. • Power on NodeF then verify th

Cluster Testing 141 • Monitor cluster logfiles on NodeT if HACMP has been customized to monitor 7133 disk failures. • Since the 7133 disk is hot pl

xiv IBM Certification Study Guide AIX HACMP • AIX parameters that are affected by an HACMP installation, and their correct settings • The cluster

142 IBM Certification Study Guide AIX HACMP

© Copyright IBM Corp. 1999 143Chapter 7. Cluster TroubleshootingTypically, a functioning HACMP cluster requires minimal intervention. If a problem oc

144 IBM Certification Study Guide AIX HACMPFor a more detailed description of the cluster log files consult Chapter 2 of the HACMP for AIX, Version

Cluster Troubleshooting 145hang. After a certain amount of time, by default 360 seconds, the cluster manager will issue a config_too_long message int

146 IBM Certification Study Guide AIX HACMP7.3.1 Tuning the System Using I/O PacingUse I/O pacing to tune the system so that system resources are d

Cluster Troubleshooting 1477.3.4 Changing the Failure Detection Rate Use the SMIT Change/Show a Cluster Network Module screen to change the failure

148 IBM Certification Study Guide AIX HACMPand control messages so that the Cluster Manager has accurate information about the status of its partner

Cluster Troubleshooting 1497.6 User ID ProblemsWithin an HACMP cluster, you always have more than one node potentially offering the same service to

150 IBM Certification Study Guide AIX HACMP • Go from the simple to the complex. Make the simple tests first. Do not try anything complex and compl

© Copyright IBM Corp. 1999 151Chapter 8. Cluster Management and AdministrationThis chapter covers all aspects of monitoring and managing an existing

xvPOWERparallel Systems area, known as the SP1 at that time. In 1997 he began working on HACMP as the Service Groups for HACMP and RS/6000 SP merged

152 IBM Certification Study Guide AIX HACMPConsult the HACMP for AIX, Version 4.3: Troubleshooting Guide, SC23-4280, for help if you detect a proble

Cluster Management and Administration 153More details on how to configure HAView and on how to monitor your cluster with HAView can be found in Chapt

154 IBM Certification Study Guide AIX HACMP8.1.3.5 /tmp/cm.log Contains timestamped, formatted messages generated by HACMP for AIX clstrmgr activit

Cluster Management and Administration 155(C-SPOC) utility can be used to start and stop cluster services on all nodes in cluster environments.Startin

156 IBM Certification Study Guide AIX HACMP8.2.1.4 Cluster Information Program daemon (clinfo)This daemon provides status information about the clu

Cluster Management and Administration 157are started in sequential order - not in parallel. The output of the command run on the remote node is retur

158 IBM Certification Study Guide AIX HACMPnode. Because the command is executed remotely, there can be a delay before the command output is returne

Cluster Management and Administration 159prevents unpredictable behavior from corrupting the data on the shared disks. See the clexit.rc man page for

160 IBM Certification Study Guide AIX HACMP8.3 Replacing Failed ComponentsFrom time to time, it will be necessary to perform hardware maintenance o

Cluster Management and Administration 161 • The new adapter must be of the same type or a compatible type as the replaced adapter. • When replacing

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162 IBM Certification Study Guide AIX HACMP4. Logically remove the disk from the system (rmdev -l hdiskX -d; rmdev -l pdiskY -d if a SSA disk) on al

Cluster Management and Administration 1638.4 Changing Shared LVM ComponentsChanges to VG constructs are probably the most frequent kind of changes t

164 IBM Certification Study Guide AIX HACMPWhen changing shared LVM components manually, you will usually need to run through the following procedur

Cluster Management and Administration 165Lazy Update has some limitations, which you need to consider when you rely on Lazy Update in general: • If

166 IBM Certification Study Guide AIX HACMP • Shared volume groups • List all volume groups in the cluster. • Import a volume group (with HACMP 4

Cluster Management and Administration 167To use the SMIT shortcuts to C-SPOC, type smit cl_lvm or smit cl_conlvm for concurrent volume groups. Concur

168 IBM Certification Study Guide AIX HACMPTo change the nodes associated with a given resource group, or to change the priorities assigned to the n

Cluster Management and Administration 169 • If the Cluster Manager is active on the local node, synchronization triggers a cluster-wide, dynamic rec

170 IBM Certification Study Guide AIX HACMP8.5.3.1 Resource Migration TypesBefore performing a resource migration, decide if you will declare the m

Cluster Management and Administration 171INACTIVE_TAKEOVER flag set to false and has not yet started because its primary node is down.In general, how

© Copyright IBM Corp. 1999 1Chapter 1. Certification OverviewThis chapter provides an overview of the skill requirements for obtaining an IBM Certifi

172 IBM Certification Study Guide AIX HACMPIf you do not include a location specifier in the location field, the DARE Resource Migration utility per

Cluster Management and Administration 173Note that you cannot add nodes to the resource group list with the DARE Resource Migration utility. This tas

174 IBM Certification Study Guide AIX HACMPBe aware that persistent sticky location markers are saved and restored in cluster snapshots. You can use

Cluster Management and Administration 1755. Restart the HACMP for AIX software on the node using the smit clstart fastpath and verify that the node s

176 IBM Certification Study Guide AIX HACMP • Cluster nodes should be running the same HACMP maintenance levels. There might be incompatibilities b

Cluster Management and Administration 1778.7.1.1 How to do a split-mirror backupThis same procedure can be used with just one mirrored copy of a log

178 IBM Certification Study Guide AIX HACMP9. After the backup is complete and verified, unmount and delete the new file system and the logical volu

Cluster Management and Administration 179they don’t match, the user won’t get anything done after a failover happened. So, the administrator has to k

180 IBM Certification Study Guide AIX HACMPTo add a user on one or more nodes in a cluster, you can either use the AIX mkuser command in a rsh to on

Cluster Management and Administration 181To remove a user account from one or more cluster nodes, you can either use the AIX rmuser command on one cl

2 IBM Certification Study Guide AIX HACMP1.2 Certification Exam ObjectivesThe following objectives were used as a basis for what is required when t

182 IBM Certification Study Guide AIX HACMP

© Copyright IBM Corp. 1999 183Chapter 9. Special RS/6000 SP TopicsThis chapter will introduce you to some special topics that only apply if you are r

184 IBM Certification Study Guide AIX HACMPneed to have the frame supervisors support dual tty lines in order to get both control workstations conne

Special RS/6000 SP Topics 185The backup cws has to be installed with the same level of AIX and PSSP. Depending on the kerberos configuration of the p

186 IBM Certification Study Guide AIX HACMPordinary HACMP cluster, as it is described in Chapter 7 of the HACMP for AIX, Version 4.3: Installation G

Special RS/6000 SP Topics 187After that, identify the HACWS event scripts to HACMP by executing the /usr/sbin/hacws/spcw_addevents command, and verif

188 IBM Certification Study Guide AIX HACMPThe following is simply a shortened description on how kerberos works. For more details, the redbook Insi

Special RS/6000 SP Topics 189allow the clients to get service tickets to be used with other servers without the need to give them the password every

190 IBM Certification Study Guide AIX HACMPAfter setting the cluster’s security settings to enhanced for all these nodes, you can verify that it is

Special RS/6000 SP Topics 191With reference to Figure 17 above, imagine two nodes, Node X and Node Y, running the same application. The nodes are con

Certification Overview 3 • Create an application server. • Set up Event Notification. • Set up event notification and pre/post event scripts. • S

192 IBM Certification Study Guide AIX HACMPThe VSDs in this scenario are mapped to the raw logical volumes lv_X and lv_Y. Node X is a client of Node

Special RS/6000 SP Topics 193impact of servicing a local I/O request through VSD relative to the normal VMM/LVM pathway is very small. IBM supports a

194 IBM Certification Study Guide AIX HACMPoperation that was in progress, as well as new I/O operations against rvsd_X, are suspended until failove

Special RS/6000 SP Topics 1959.4 SP Switch as an HACMP NetworkOne of the fascinating things with an RS/6000 SP is the switch network. It has develop

196 IBM Certification Study Guide AIX HACMP9.4.2 Eprimary Management The SP switch has an internal primary backup concept, where the primary node,

Special RS/6000 SP Topics 197In case this node was the Eprimary node on the switch network, and it is an SP switch, then the RS/6000 SP software woul

198 IBM Certification Study Guide AIX HACMP

© Copyright IBM Corp. 1999 199Chapter 10. HACMP Classic vs. HACMP/ES vs. HANFSSo, why would you prefer to install one version of HACMP instead of ano

200 IBM Certification Study Guide AIX HACMPhandling membership and event management by using heartbeats. On the SP, the original High Availability i

HACMP Classic vs. HACMP/ES vs. HANFS 201See Part 4 of HACMP for AIX, Version 4.3: Enhanced Scalability Installation and Administration Guide, SC23-42

4 IBM Certification Study Guide AIX HACMP1.3 Certification Education CoursesCourses and publications are offered to help you prepare for the certif

202 IBM Certification Study Guide AIX HACMP10.4 Similarities and DifferencesAll three products have the basic structure in common. They all use the

HACMP Classic vs. HACMP/ES vs. HANFS 203For switchless RS/6000 SP systems or SPs with the newer SP Switch, the decision will be based on a more funct

204 IBM Certification Study Guide AIX HACMP

© Copyright IBM Corp. 1999 205Appendix A. Special NoticesThis publication is intended to help System Administrators, System Engineers and other Syste

206 IBM Certification Study Guide AIX HACMPbeen reviewed by IBM for accuracy in a specific situation, there is no guarantee that the same or similar

Special Notices 207Java and HotJava are trademarks of Sun Microsystems, Incorporated.Microsoft, Windows, Windows NT, and the Windows 95 logo are trad

208 IBM Certification Study Guide AIX HACMP

© Copyright IBM Corp. 1999 209Appendix B. Related PublicationsThe publications listed in this section are considered particularly suitable for a more

210 IBM Certification Study Guide AIX HACMPB.3 Other PublicationsThese publications are also relevant as additional sources of information: •IBM R

© Copyright IBM Corp. 1999 211How to Get ITSO RedbooksThis section explains how both customers and IBM employees can find out about ITSO redbooks, CD-

Certification Overview 5The following table outlines information about the next course. Table 2. AIX Version 4 HACMP System Administration Course Nu

212 IBM Certification Study Guide AIX HACMPHow Customers Can Get ITSO RedbooksCustomers may request ITSO deliverables (redbooks, BookManager BOOKs,

213IBM Redbook Order FormPlease send me the following:We accept American Express, Diners, Eurocard, Master Card, and Visa. Payment by credit card no

214 IBM Certification Study Guide AIX HACMP

© Copyright IBM Corp. 1999 215List of AbbreviationsAIXAdvanced Interactive ExecutiveAPAAll Points AddressableAPARAuthorized Program Analysis ReportTh

216 IBM Certification Study Guide AIX HACMPNETBIOSNetwork Basic Input/Output SystemNFSNetwork File SystemNIMNetwork Interface Module (This is the de

© Copyright IBM Corp. 1999 217IndexSymbols/.rhosts fileediting 59/etc/hosts fileand adapter label 38/sbin/rc.boot file 146/usr/sbin/cluster/godm

218 IBM Certification Study Guide AIX HACMPDGSP message 148Disk Capacities 19Disk Failure 139dual-network 36Dynamic Reconfiguration 169Eed

219Network Topology 35networkspoint-to-point 36NFSmounting filesystems 126takeover issues 126NFS cross mount 41NFS Exports 41NFS mount

220 IBM Certification Study Guide AIX HACMPToken-Ring 13Topology Service 200topsvcsd 156UUpgrading 96user accountsadding 179changing 180

© Copyright IBM Corp. 1999 221ITSO Redbook EvaluationIBM Certification Study Guide AIX HACMP SG24-5131-00Your feedback is very important to help us m

6 IBM Certification Study Guide AIX HACMP

Printed in the U.S.A.SG24-5131-00IBM Certification Study Guide AIX HACMP SG24-5131-00

© Copyright IBM Corp. 1999 7Chapter 2. Cluster PlanningThe area of cluster planning is a large one. Not only does it include planning for the types o

8 IBM Certification Study Guide AIX HACMPRISC System/6000 models as nodes in an HACMP 4.1 for AIX, HACMP 4.2 for AIX, or HACMP 4.3 for AIX cluster.T

Cluster Planning 9Much of the decision centers around the following areas: • Processor capacity • Application requirements • Anticipated growth re

10 IBM Certification Study Guide AIX HACMPYour slot configuration must also allow for the disk I/O adapters you need to support the cluster’s shared

Cluster Planning 112.2 Cluster NetworksHACMP differentiates between two major types of networks: TCP/IP networks and non-TCP/IP networks. HACMP util

IBM Certification Study GuideAIX HACMP May 1999SG24-5131-00International Technical Support Organization

12 IBM Certification Study Guide AIX HACMP • FDDI • SP Switch •SLIP •SOCC • Token-RingAs an independent, layered component of AIX, the HACMP fo

Cluster Planning 13Network types also differentiate themselves in the maximum distance they allow between adapters, and in the maximum number of adap

14 IBM Certification Study Guide AIX HACMP • SP Switch is a high-speed packet switching network, running on the RS/6000 SP system only. It runs bid

Cluster Planning 152.2.2.2 Special Considerations As for TCP/IP networks, there are a number of restrictions on non-TCP/IP networks. These are expla

16 IBM Certification Study Guide AIX HACMP2 a PCI Multiport Async Card is required in an S7X model, no native ports3 only one serial port available

Cluster Planning 17SSA subsystems are built up from loops of adapters and disks. A simple example is shown in Figure 1.Figure 1. Basic SSA Configura

18 IBM Certification Study Guide AIX HACMP • 7133 Serial Storage Architecture (SSA) Disk Subsystem Models 010, 500, 020, 600, D40 and T40.The 7133

Cluster Planning 192.3.1.1 Disk CapacitiesTable 8 lists the different SSA disks, and provides an overview of their characteristics.Table 8. SSA Dis

20 IBM Certification Study Guide AIX HACMP1See 2.3.1.3, “Rules for SSA Loops” on page 20 for more information.The following rules apply to SSA Adapt

Cluster Planning 21 • A maximum of 48 devices can be connected in a particular SSA loop. • Only one pair of adapter connectors can be connected in

© Copyright International Business Machines Corporation 1999. All rights reserved.Note to U.S Government Users – Documentation related to restricted

22 IBM Certification Study Guide AIX HACMP2.3.1.4 RAID vs. Non-RAIDRAID TechnologyRAID is an acronym for Redundant Array of Independent Disks. Disk

Cluster Planning 23RAID Levels 2 and 3RAID 2 and RAID 3 are parallel process array mechanisms, where all drives in the array operate in unison. Simil

24 IBM Certification Study Guide AIX HACMPAs with RAID 3, in the event of disk failure, the information can be rebuilt from the remaining drives. RA

Cluster Planning 25 • Array member drives and spares must be on same loop (cannot span A and B loops) on the adapter. • You cannot boot (ipl) from

26 IBM Certification Study Guide AIX HACMP2.3.2 SCSI DisksAfter the announcement of the 7133 SSA Disk Subsystems, the SCSI Disk subsystems became l

Cluster Planning 27 • Enhanced SCSI-2 Differential Fast/Wide Adapter/A (MCA, FC: 2412, Adapter Label: 4-C); not usable with 7135-110 • SCSI-2 Fast/

28 IBM Certification Study Guide AIX HACMPwithdraw the 7135 RAIDiant Systems from marketing because it is equally possible to configure RAID on the

Cluster Planning 29 • Cascading • Rotating • ConcurrentEach of these types describes a different set of relationships between nodes in the cluster

30 IBM Certification Study Guide AIX HACMPreintegration, a node remains as a standby and does not take back any of the resources that it had initial

Cluster Planning 31Figure 2. Hot-Standby ConfigurationIn this configuration, there is one cascading resource group consisting of the four disks, hdi

© Copyright IBM Corp. 1999 iiiContentsFigures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ix

32 IBM Certification Study Guide AIX HACMPthe cluster becomes a standby node. You must choose a rotating standby configuration if you do not want a

Cluster Planning 33When a failed node reintegrates into the cluster, it takes back the resource group for which it has the highest priority. Therefor

34 IBM Certification Study Guide AIX HACMPHere the resource groups are the same as the ones in the mutual takeover configuration. Also, similar to t

Cluster Planning 35 • Design the network topology • Define a network mask for your site • Define IP addresses (adapter identifiers) for each node’

36 IBM Certification Study Guide AIX HACMPDual NetworkA dual-network setup has two separate networks for communication. Nodes are connected to two n

Cluster Planning 37The following diagram shows a cluster consisting of two nodes and a client. A single public network connects the nodes and the cli

38 IBM Certification Study Guide AIX HACMPSLIP are considered public networks. Note that a SLIP line, however, does not provide client access.Privat

Cluster Planning 39until it assumes the shared IP address. Consequently, Clinfo makes known the boot address for this adapter.In an HACMP for AIX env

40 IBM Certification Study Guide AIX HACMPservice label (address) instead of the boot label. If the node should fail, a takeover node acquires the f

Cluster Planning 41If you do not use Hardware Address Takeover, the ARP cache of clients can be updated by adding the clients’ IP addresses to the PI

iv IBM Certification Study Guide AIX HACMPChapter 3. Cluster Hardware and Software Preparation . . . . . . . . . . . 513.1 Cluster Node Setup . .

42 IBM Certification Study Guide AIX HACMPapplication on the takeover node when a fallover occurs. For more information about creating application s

Cluster Planning 432.5.3 Licensing Methods Some vendors require a unique license for each processor that runs an application, which means that you m

44 IBM Certification Study Guide AIX HACMP2.6 Customization PlanningThe Cluster Manager’s ability to recognize a specific series of events and sube

Cluster Planning 45event to inform system administrators that traffic may have to be rerouted. Afterwards, you can use a network_up notification even

46 IBM Certification Study Guide AIX HACMP2.6.2.1 Single Point-of-Failure Hardware Component RecoveryAs described in 2.2.1.2, “Special Network Cons

Cluster Planning 47The above example screen will add a Notification Method to the ODM, so that upon appearance of the HPS_FAULT9_ER entry in the erro

48 IBM Certification Study Guide AIX HACMP2.7 User ID PlanningThe following sections describe various aspects of User ID Planning. 2.7.1 Cluster U

Cluster Planning 492.7.2 Cluster PasswordsWhile user and group management is very much facilitated with C-SPOC, the password information still has t

50 IBM Certification Study Guide AIX HACMP2.7.3.3 NFS-Mounted Home Directories on Shared VolumesSo, a combined approach is used in most cases. In o

© Copyright IBM Corp. 1999 51Chapter 3. Cluster Hardware and Software PreparationThis chapter covers the steps that are required to prepare the RS/60

v5.1.3 Event Notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1225.1.4 Event Recovery and Retry . . . . . . . .

52 IBM Certification Study Guide AIX HACMPmirroring rootvg in order to avoid the impact of the failover time involved in a node failure. In terms of

Cluster Hardware and Software Preparation 53mirrored. If the dump devices are NOT the paging device, that dump logical volume will not be mirrored.3.

54 IBM Certification Study Guide AIX HACMP“-m” option. You should consult documentation on the usage of the “-m” option for mklvcopy.4. Synchronize

Cluster Hardware and Software Preparation 553.1.2.2 Necessary APAR FixesTable 11. Necessary APAR FixesTo determine if either fix is installed on a

56 IBM Certification Study Guide AIX HACMP • nv6000.database.obj 4.1.0.0 • nv6000.Features.obj 4.1.2.0 • nv6000.client.obj 4.1.0.0and for HAView

Cluster Hardware and Software Preparation 57and low-water marks. If a process tries to write to a file at the high-water mark, it must wait until eno

58 IBM Certification Study Guide AIX HACMP3.1.4.3 Editing the /etc/hosts File and Nameserver ConfigurationMake sure all nodes can resolve all clust

Cluster Hardware and Software Preparation 593.1.4.5 Editing the /.rhosts File Make sure that each node’s service adapters and boot addresses are lis

60 IBM Certification Study Guide AIX HACMP3.2 Network Connection and TestingThe following sections describe important aspects of network connection

Cluster Hardware and Software Preparation 61.Figure 9. Connecting Networks to a Hub3.2.1.2 IP Addresses and SubnetsThe design of the HACMP for AIX

vi IBM Certification Study Guide AIX HACMP8.1.1 The clstat Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1528.1.2 Monit

62 IBM Certification Study Guide AIX HACMPTo comply with these rules, pay careful attention to the IP addresses you assign to standby adapters. Stan

Cluster Hardware and Software Preparation 63 • Scan the /tmp/hacmp.out file to confirm that the /etc/rc.net script has run successfully. Look for a

64 IBM Certification Study Guide AIX HACMPTMSSA Target-mode SSA is only supported with the SSA Multi-Initiator RAID Adapters (Feature #6215 and #621

Cluster Hardware and Software Preparation 653.2.2.4 Configuring Target Mode SSAThe node number on each system needs to be changed from the default o

66 IBM Certification Study Guide AIX HACMPcat /etc/environment > /dev/tmssay.im on the corresponding node for writing. x and y correspond to the

Cluster Hardware and Software Preparation 67For more information regarding adapters and cabling rules see 2.3.1, “SSA Disks” on page 16 or the follow

68 IBM Certification Study Guide AIX HACMPAdapter DefinitionsBy issuing the following command, you can check the correct adapter configuration. In o

Cluster Hardware and Software Preparation 69SSA physical disks: • Are configured as pdisk0, pdisk1,...,pdiskN. • Have errors logged against them i

70 IBM Certification Study Guide AIX HACMPConfiguration Verification This option enables you to display the relationships between physical (pdisk) a

Cluster Hardware and Software Preparation 7112.Run cfgmgr to install the microcode to adapters.13.To complete the device driver upgrade, you must now

vii9.3 VSDs - RVSDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1909.3.1 Virtual Shared Disk (VSDs) . . . .

72 IBM Certification Study Guide AIX HACMP18.To confirm that the upgrade was a success, type lscfg -vl pdiskX where X is 0,1... for all SSA disks. C

Cluster Hardware and Software Preparation 733.3.2.1 CablingThe following sections describe important information about cabling. SCSI AdaptersA overv

74 IBM Certification Study Guide AIX HACMPFC: 2902 or 9202 (2.4m), PN: 67G1260 - OR -FC: 2905 or 9205 (4.5m), PN: 67G1261 - OR -FC: 2912 or 9212 (12

Cluster Hardware and Software Preparation 75FC: 2426 (0.94m), PN: 52G4234 • 16-Bit SCSI-2 Differential System-to-System CableFC: 2424 (0.6m), PN: 52

76 IBM Certification Study Guide AIX HACMPTTTT6 bit)6 (16-bit)#2416 (16-#24246-bit)6 (16-bit )#2426#2416 (16-b#2416 (16-bit)#2426Maximum total cable

Cluster Hardware and Software Preparation 77Figure 11. 7135-110 RAIDiant Arrays Connected on Two Shared 16-Bit SCSI Buses3.3.2.3 Adapter SCSI ID an

78 IBM Certification Study Guide AIX HACMPSCSI-2 Differential Fast/Wide Adapter/A and Enhanced SCSI-2 Differential Fast/Wide Adapter/A) are shown in

Cluster Hardware and Software Preparation 79The ID of an SCSI adapter, by default, is 7. Since each device on an SCSI bus must have a unique ID, the

80 IBM Certification Study Guide AIX HACMP4. Reboot the machine to bring the change into effect.The same task can be executed from the command line

Cluster Hardware and Software Preparation 81The command line version of this is:As in the case of the SCSI-2 Differential Controller, a system reboot