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POWERHA Implementation Overview

Andrew Lanczi
Certified Consulting I/T Specialist

© IBM Corporation 2008


zUnderstand the Implementation of HACMP


9How HACMP works

9Configuration options


© IBM Corporation 2008

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HACMP Customers
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3 July.1 July. HACMP Version Summary Version Availability End of Support V4. 2006 V5. 2005 Sept. 2007 V5.4 July. Red – no longer supported © IBM Corporation 2008 . 2006 Sept. 2005 V5.5 June.2 July. 2009 (est) Green – supported. 2004 Sept. 2003 Sept. 2008 V5. 2002 Sept.

HACMP V5.4 – Key Features Faster Failure Detection using First Failure Data Capture (FFDC) HACMP on Linux (for Power) Performance improvements to HACMP/XD GLVM Can have up to 4 data mirroring networks Support for Enhanced Concurrent Volume Groups GPFS 2.3 Support IPAT support on Geographic Networks (for HACMP/XD) © IBM Corporation 2008 .

and clients ƒ HACMP supports 2 .32 nodes per cluster © IBM Corporation 2008 . networks. HACMP Cluster Network(s) Node A Node B Client Shared Disk zA typical cluster consists of nodes. shared storage.

FC 5723 2 Gb FC PCI-X . McData. Hardware pSeries Servers/ POWER No Integrated serial ports for heartbeat on P5 servers Announcement letter for limitations .#5765-F62 Network/SAN 2-port Async. TotalStorage SAN Volume Controller Software © IBM Corporation 2008 . Cisco. RS-232 .. Brocade etc.FC 5716 10 Gb FC 5718 and FC 5719 IBM.

0.9b050406) and higher DS6000 . EMC. Additional Hardware TotalStorage Products DS8000 .. 2105-800) OEM per CSA.324 firmware update is not supported in HACMP clusters DS4100 and DS4000 EXP1000 Serial ATA Hardware DS4100 does not support multi-path I/O so no multi path fallover CSPOC cannot be used to add a DS4100 disk to AIX Totalstorage DS4000 EXP710 FC Storage Expansion unit (1740-710) TotalStorage ESS (2105-F20. firmware update is now supported (code level 6. © IBM Corporation 2008 .0. © IBM Corporation 2008 .3.0 or higher AIX already has this level jre windows needs it 9www. Online Planning Worksheets (OLPW) Stand alone tools for planning a cluster Can be used to configure a cluster with cl_opsconfig utility Does not monitor or manage a cluster Useable on AIX or Windows 2000 Installation Requirements Java Runtime Environment version 1.

dtd External XML Schema /usr/es/sbin/cluster/worksheets/hacmp-v5300. ASCII Based Cluster Configuration Well defined and documented XML file structure using Document Type Definition (DTD) and XML schema Configuration file can be passed to XML editors Allows customers to modify cluster configs that can then be passed to multiple clusters cl_exportdefinition .worksheet from existing cluster Extermal DTD /usr/es/sbin/cluster/worksheets/hacmp-v5300.xsd © IBM Corporation 2008 .

ASCII Based Cluster Configuration Duplicate a cluster with changes Export Definition file for OLPW XML file XML Editor HACMP Cluster Updated XML file cl_opsconfig New HACMP Cluster © IBM Corporation 2008 .

Web-based Cluster Management-webSMIT The Main page after login © IBM Corporation 2008 . (optionally)Documentation filesets: cluster. Web-based Cluster Management-webSMIT Requirements Any "Apache-Compliant" web Server IBM HTTP Server Apache /usr/es/sbin/cluster/wsm/README tells how to install Apache from RPMs Fileset cluster.client.en_US.pdf cluster.en_US.html © IBM Corporation 2008 .

(Reliable Scalable Cluster Technology) RMC subsystem Cluster Manager .(clstrmgr) Recovery driver SNMP Services clcomd . optional) © IBM Corporation 2008 .cluster communications daemon clinfo .(cluster information services. HACMP Components RSCT .

How HACMP Works Heartbeat is used to monitor health IP Network RS-232 Disk Disk © IBM Corporation 2008 .

Networks for an HACMP cluster At least two networks are recommended One physical network with multiple logical IP subnets One non IP based network rs-232 disk heartbeat The goal is to avoid a partitioned cluster both nodes always get the latest information Decide on the mechanism to provide availability of Service addresses IPAT via Replacement IPAT via Aliasing .The default Other requirements persistent IP addresses © IBM Corporation 2008 .

Which IPAT? "IPAT via Aliasing": IP address takeover performed by moving an IP alias address from one interface to another . without changing the base address of the interface ƒIP aliasing allows multiple resource groups to be configured using the same adapters ƒIP aliased networks use boot and service labels ‹Boot label on standby adapters as well ‹No Hardware Address Takeover on Service IP "IPAT via IP Replacement": IP address takeover performed by swapping an interfaces boot-time address with a service IP address ƒOnly one address can be active on an interface at any time © IBM Corporation 2008 .

Network IPAT Connection options
IPAT via Aliasing
a_boot1 b_boot3
a_boot2 b_boot4
IPAT via Replacement
a_boot b_svc
a_standby b_standby

subnet mask

sysa © IBM Corporation 2008 sysb

Networking with switches

One Layer 3 VLAN with multiple logical subnets

Do not place intelligent
network equipment that
does not transparently
pass through UDP
broadcasts and other
packets to all cluster
nodes. If such equipment
is placed in the paths
between cluster nodes
and clients, use a
clinfo.rc © IBM Corporation 2008

CISCO Example with HACMP
Assume that the customer is using the standard Cisco Switch product line of 3550, 3750, 49xx, 6500, etc.
At the L3 level, one vlan is all that is needed to satisfy the HACMP setup. You just define multiple
IP addresses as secondary addresses on this vlan interface for the multiple subnets. For example: the
three subnets are,, and as primary, standby, alias HA networks
respectively all using vlan 50. On a Cisco L3 switch/router using IOS, you would code the following:

Switch# config t
Switch(config)# vlan 50
Switch(config-vlan)# name HACMP_Setup
Switch(config-vlan)# exit
Switch(config)# int vlan 50
Switch(config-if)# ip address
Switch(config-if)# ip address secondary ( Alias IP address net)
Switch(config-if)# ip address secondary ( Standby IP address net)
Switch(config-if)# no shut
Switch(config-if)# exit
Switch(config)# exit
You now have vlan 50 customized with three different ip address identities (one for each of the
subnets), and all of them pingable. Alias and standby/boot are tagged as secondary.
© IBM Corporation 2008

Persistant Labels An IP alias that is always available if a service or boot interface is active Intended to provide administrators access to a node Only one persistent label per node per network is allowed Once synchronized. they are always available Can be used for HATivoli oserv process IP © IBM Corporation 2008 .

p5 server = no! © IBM Corporation 2008 . 3 or 4 can be used for this connection Built in serial port 1 is not supported for HACMP In LPAR mode it is better to allocate a PCI slot for the async adapter on each server is using rs-232 serial network Check documentation to make sure the port is supported. Heartbeat Over RS232 A point to point non IP serial network usually implemented using Async adapter and a null modem cable connection On some pSeries servers that have 3 or 4 built in serial ports. ports 2. prior to implementation.

For customers that consider rs232. or tmscsi too costly or complex to setup Requires an enhanced concurrent VG Configured via the "Extended Configuration path" Uses a disk sector formerly reserved for clvmd May not be a good alternative for a disk with heavy I/O © IBM Corporation 2008 . Heartbeat Over Disk (diskhb) Provides users with: A point to point network type that is easy to configure as a volume group Additional protection against cluster partitioning A Serial network that can use any disk type Doesn't require additional hardware. tmssa.

Heartbeat Over Disk (diskhb) Any disk in an enhanced concurrent VG can be used point to point networks disknet1 enhconcvg disknet1 hdisk1 disknet2 hdisk2 disknet3 hdisk3 disknet2 disknet3 © IBM Corporation 2008 .

about 1MB per node managed by SRC and started by init. Cluster Communication Daemon clcomd provides a secure transport layer caches ODM's for performance /var/hacmp/odmcache . the inittab entry is: clcomdES:2:once:startsrc -s clcomdES > /dev/console 2>&1 Source addresses are checked against /usr/sbin/cluster/etc/rhosts HACMPadapter ODM HACMPnode ODM (communication paths) © IBM Corporation 2008 .

0].CtSec Use a VPN tunnel Set up persistent IP labels on the same subnet chgsrc to add the -p to clcomd specify port 6191 (clcomd entry in /etc/services) use the extended VPN configuration screen to secure traffic for other cluster services If there is an unresolvable label in /usr/es/sbin/cluster/etc/rhosts. Cluster Communication Daemon Security Strategies The default is autodiscovery AIX Cluster security . all connections will be denied Log Files – /var/hacmp/clcomd/clcomd.up to 1 MB each – /var/hacmp/clcomd/clcomddiag.log[.log[.0].up to 9 MB each © IBM Corporation 2008 .

LVM and Disks Use mirrored logical volumes Including mirrored jfslogs Consider quorum issues Use mutiple connections from the servers to the disk subsystem(s) DBVG jfsloglv dblv db2lv DBVG' jfsloglv' dblv' db2lv' © IBM Corporation 2008 .

clvm.recommended or chvg -C on ALL cluster nodes © IBM Corporation 2008 .active vs passive varyon etc.enh If migrating shared VGs must be converted System Management (CSPOC) . Fast Disk Takeover Requires Enhanced Concurrent Volume Groups Provides a significant performance gain for takeover of volume groups consisting of a large number of disks requires Enhanced Concurrent Volume Groups in non-concurrent resource groups Uses RSCT for communication HACMP coordinates activity between nodes . bos.

Maintains data integrity by eliminating manual LVM operations. LVM mirroring allows up to three data copies. Cross Site LVM mirroring Management feature to simplify the configuration of LVM mirroring between two sites. Keeping the data in different locations eliminates the possibility of data loss upon disk block failure situation. in separate disk enclosure. For high availability each mirror copy should be located on separate physical disk. © IBM Corporation 2008 . Mirror synchronization is required for stale partitions. Provides automatic LVM mirror synchronization after disk failure when a node/disk becomes available in a SAN network. Cluster verification enhancements to ensure the data high availability. at separate physical locations.

Cross-Site LVM Mirroring Two sites connected using a SAN network Site A Site B Node C Node A PV1 PV3 FC Switch 1 FC Switch 2 PV6 PV5 PV2 PV4 Node D Node B © IBM Corporation 2008 .

Virtual SCSI devices added to partition via HMC . VIO Server SAN Storage Subsystem AIX1 AIX2 AIX1VG VIO Server Partition Partition AIX2VG Ethernet HYPERVISOR hdisk2 hdisk1 VIOS owns physical disk resources .LVM based storage on VIO Server LPAR’S sees disks as vSCSI (Virtual SCSI) devices .LUNs on VIOS accessed as vSCSI disk © IBM Corporation 2008 .

VIO Server Implementation Single VIO Server configuration has exposures The VIO Server partition is shutdown or fails Network connectivity through the VIO Server Disk Failure System failure © IBM Corporation 2008 .

Provides access to outside world .Provide isolation of communication to VLAN members . High Availability with Dual VIO Servers External Servers External Servers VIO AIX1 AIX2 VIO Server Server vSCSI vSCSI vLAN vLAN Shared Virtual Ethernet Switch Shared Ethernet Ethernet Adapter POWER Hypervisor Adapter VLAN 1 VLAN 2 IEEE VLANS .Up to 4096 VLANS Virtual Ethernet .Up to 65533 vENET adapters .Provide ability for adapter to be on multiple subnets .3 and POWER5 .Partition to partition communication .Allows a single adapter to support multiple subnets © IBM Corporation 2008 .Uses Physical Adapter in the Virtual I/O Server .21 VLANS per vENET adapter VLAN – Virtual LAN Shared Ethernet Adapter .Requires AIX 5L V5.

VIO Server with HACMP Cluster SAN Storage Subsystem HACMP HACMP AIX1VG VIO Server AIX1 AIX2 AIX2VG Partition Partition Ethernet HYPERVISOR hdisk2 hdisk1 Issues: Network Connectivity? Shared Disk Access? SPOFs Available via Advance POWER Virtualization © IBM Corporation 2008 .

Custom Resource Groups A collection of resources is a resource group. Disks. Filesystems IP Addresses Custom Resource Groups Users explicitly specify the desired startup . © IBM Corporation 2008 . fallover. Resources can be: Applications Volume Groups. and fallback behaviors Can be configured using standard or extended path Settling and Fallback timers provide further granularity ‹ Dynamic node priority can provide even further granularity in multi-node cluster.

(OFAN) Online Using Distribution Policy .(NFB) © IBM Corporation 2008 .(FHPN) Never Fallback .(BO) This is most appropriate for concurrent type RGs Fallback Preferences Fallback To Higher Priority Node .(OAAN) Fallover Preferences Fallover To Next Priority Node In The List . Custom Resource Groups Startup Preferences Online On Home Node Only .(OUDP) Online On All Available Nodes (concurrent) .(FUDNP) Bring Offline (On Error Node Only) .(FNPN) Fallover Using Dynamic Node Priority .(OHN) Online on First Available Node .

all resources of this type are allocated to the first physical resource that is not already serving a resource .default HACMP Extended Resources Configuration Configure Resource Distribution Policies Configure Service IP Labels/Address Distribution Preference Type or select Values in entry fields. Press Enter AFTER making all desired changes [Entry Fields] *Network Name net_ether_01 *Distribution Preference Anti-Collocation + © IBM Corporation 2008 . Resource Distribution Policies Control of IP via aliasing service labels Collocation .all resources of this type will be on the same physical resource Anti-collocation .

Resource Distribution Policies All policies are exercised by cluster event scripts acquire_service_addr acquire_takeover_addr cl_configure_persistent_address collocation with persistent anti-collocation with persistent Feature is available in all versions of HACMP V5 HA 5.2 requires APAR IY63516 © IBM Corporation 2008 .1 requires APAR IY63515 HA 5.

child . Dependent Resource Groups Used for multi-tiered architectures that require ordered resource group processing Allows the implementer to specify cluster wide dependencies between resouces groups parent .Dependency type Option to display dependancies clRGinfo -a Resource Group A (child resource group) Dependency Resource Group B Resource Group C (parent resource group) (parent resource group) © IBM Corporation 2008 .

Custom Resources Three Node Cluster with one resource group configured for Online on Home Node Only priority at startup Sysa is the current owner of the resource group GROUPA a_svc 1.1.1 dbvg dbapp a_stdby a_svc b_svc b_stdby c_svc c_stdby dbvg sysa sysb sysc © IBM Corporation 2008 .1.

Custom Resources after fallover Sysa has crashed! Fallover To Next Priority Node In The List If sysb was not available. sysc would have acquired GROUPA GROUPA a_svc 1.1 dbvg dbapp a_stdby b_svc a_svc c_svc c_stdby dbvg sysa sysb sysc © IBM Corporation 2008 .1.1.

1 dbvg dbapp b_svc b_stdby c_svc c_stdby a_stdby a_svc dbvg sysa sysc sysb © IBM Corporation 2008 .1.1. Custom Resources .reintegration Sysa is repaired and hacmp is restarted on sysa ƒ Fallback To Higher Priority Node GROUPA a_svc 1.

Custom Resources after fallover Sysa has crashed! ƒFallover Using Dynamic Node Priority Destination determined by DNP rules .1 dbvg dbapp a_stdby b_svc b_boot c_svc c_boot dbvg sysa sysb sysc © IBM Corporation 2008 .1.1.lowest CPU usage GROUPA a_svc 1.

Online on All Nodes Up to 32 nodes access the data simultaneously All systems have the resource group All systems read and write to the database LCMP GROUPA dbvg ORAC dbvg sysa sysb sysc © IBM Corporation 2008 .

preference = Online On First Available Node Can be found under "Configure Resource Group Run-Time Policies" in SMIT Configure Settling Time for Resource Groups Type or select values in entry fields. Configuration Settling Time Implementers can configure a cluster settling time to minimize RG fallback activity when multiple nodes are started at the same time controls how long to wait for a higher priority node to join the cluster before bringing a resource group online One time per cluster . Press Enter AFTER making all desired changes. [Entry Fields] * Settling Time (in Seconds ) [0] # © IBM Corporation 2008 .

Can only be configured in the extended path Configure Specific Date Fallback Timer Policy Type or select values in entry fields.31) [ ] +# * HOUR (0 . etc. [Entry Fields] * Name of the Fallback Policy [ ] * YEAR [ ] # * MONTH (jan . Custom Resource Groups Configuration Fallback Timers Fallback Timers allow the implementer to control when a RG fallback will occur .23) [ ] +# * MINUTES (0 .. weekends. Press Enter AFTER making all desired peak.Dec) [ ] + * Day of Month (1 .59) [ ] +# © IBM Corporation 2008 .

Application Servers . [Entry Fields] * Server Name [ myapp ] * Start Script [/usr/local/app/start_app] * Stop Script [/usr/local/app/stop_app] F1=Help F2=Refresh F3=Cancel F4=List F5=Reset F6=Command F7=Edit F8=Image F9=Shell F10=Exit Enter=Do © IBM Corporation 2008 . Press Enter AFTER making all desired changes.Standard Path An Application Server is a label with an associated start and stop script Start/Stop = Absolute path to the executable scripts Add an Application Server Type or select values in entry fields.

Application Monitoring HACMP supports multiple monitors per application server ƒConfigured via SMIT .Extended Configuration #smitty hacmp Extended Configuration Extended Resource Configuration HACMP Extended Resources Configuration Configure HACMP Applications Add an Application Server Add Application Server [Entry Fields] * Server Name [ appsrv ] * Start Script [ /app/startserver ] * Stop Script [ /app/stopserver ] Application Monitor Name(s) monitor1 monitor2 + © IBM Corporation 2008 .

Press Enter AFTER making all desired changes. [Entry Fields] * Monitor Name [] * Application Server(s) to Monitor + * Monitor Mode [Long-running monitori> + * Processes to Monitor [] * Process Owner [] Instance Count [] # * Stabilization Interval [] # * Restart Count [] # Restart Interval [] # * Action on Application Failure [notify] + Notify Method [] Cleanup Method [] Restart Method [] © IBM Corporation 2008 . Application Monitoring Add a Process Application Monitor Type or select values in entry fields.

User Interface SMIT flow in HACMP "Standard" configuration path allows users to easily configure most common options IPAT via Aliasing Networks Shared service IP labels Volume Groups and Filesystems Application Servers easy as cake "Extended" path is used for fine tuning a configuration and configuring less common features Configure all network types Configure all resource types Less common options 9Site support 9Application Monitoring 9Performance Tuning Parameters © IBM Corporation 2008 .

specific network attributes Application Monitoring Tape resources Custom disk methods and resource recovery Extended Event Configuration Extended Performance Tuning Security and Users Snapshot Configuration © IBM Corporation 2008 . User Interface Topology configuration in the "Standard" path is carried out automatically Configuration discovery is automatic Node names are set by discovering the host names IP network topology is set based on physical connectivity and netmasks Why Do I Need the "Extended Path"? Specify sites. global networks.

Initialization and Standard Configuration Extended Configuration System Management (C-SPOC) Problem Determination Tools F1=Help F2=Refresh F3=Cancel F8=Image F9=Shell F10=Exit Enter=Do © IBM Corporation 2008 . User Interface SMITTY HACMP HACMP for AIX Move cursor to desired item and press Enter.

Two-Node Cluster Configuration Assistant Add Nodes to an HACMP Cluster Configure Resources to Make Highly Available Configure HACMP Resource Groups Verify and Synchronize HACMP Configuration HACMP Cluster Test Tool Display HACMP Configuration F1=Help F2=Refresh F3=Cancel F8=Image F9=Shell F10=Exit Enter=Do © IBM Corporation 2008 . Standard Path Installation Standard Configuration Menu Initialization and Standard Configuration Move cursor to desired item and press Enter.

Two-Node Configuration Assistant An advanced automation infrastructure for On-Demand operating environments intended for pre-existing application environments that wish to add high availability Automatically configures a simple two node cluster based on the following input: Communication path to the remote node application server name application start/stop scripts service IP label Will automatically copy the start/stop scripts to the remote node © IBM Corporation 2008 .

An active communication path to the takeover node. Install and configure the application to be made highly available. complete the following tasks: Connect and configure all IP network interfaces. © IBM Corporation 2008 . Configure the volume groups that contain the application's shared data on disks that are attached to both nodes. The application's service IP label. Two Node configuration Assistant Users must configure the topology and resources At the AIX level before using the Coonfiguration Assistant Before you start. The full path to the application's start and stop scripts. Add the application's service IP label to /etc/hosts on all nodes. A unique name to identify the application to be made highly available.

Press Enter AFTER making all desired changes. [Entry Fields] * Communication Path to Takeover Node [] + * Application Server Name [] * Application Server Start Script [] * Application Server Stop Script [] * Service IP Label [] + © IBM Corporation 2008 . Two-Node Cluster Configuration Assistant # smitty hacmp Installation and standard configuration Two-Node Cluster Configuration Assistant Two-Node Cluster Configuration Assistant Type or select values in entry fields.

clverify can be set to auto-correct. Two-Node Configuration Assistant Will create a cluster with the following characteristics IPAT via IP aliasing Local node is the highest priority Startup on highest priority node Fallover to the remote node Never Fallback Contains one application server Contains one service IP label Contains all shareable Volume Groups Activity is logged to /var/hacmp/log/clconfigassist Will synch and verify .default is no © IBM Corporation 2008 .

on system restart or both [both] Start Cluster Services on these nodes [] BROADCAST message at startup? true + Startup Cluster Information Daemon true + Reacquire after forced down false + Ignore verification errors? false Automatically correct errors found during Interactively Cluster start? © IBM Corporation 2008 . [Entry Fields] * Start now. Press Enter AFTER making all desired changes.(C-SPOC) Manage HACMP Services Start Cluster Services Start Cluster Services Type or select values in entry fields. Cluster Start # smitty clstart System Management .

ƒ/var/hacmp/clverify/pass.stores data used during the current verification attempt. This should not exist unless verification is running or was aborted ƒ/var/hacmp/clverify/aborted/ .prev/ .stores data from the most recent aborted verification attempt ƒ/var/hacmp/clverify/fail/ .stores data from the most recent failed verification attempt ƒ/var/hacmp/clverify/pass/ .stores data from the second most recent passed attempt © IBM Corporation 2008 . clverify logfiles ƒclverify collects and archives the data ƒ/var/hacmp/clverify/current/ .stores data from the most recent passed verification attempt.

or FQDN HACMP will contact the nodes using the specified comm paths and automatically configure the base IP topology Configure Nodes to an HACMP Cluster (standard) Type or select values in entry fields. [Entry Fields] * Cluster Name [andrews_cluster] New Nodes (via selected communication paths) [node1 node2] + Currently Configured Node(s) © IBM Corporation 2008 . IP address. IP label. Press Enter AFTER making all desired changes. Standard Path Installation Standard Topology Configuration Users must specify communication path.

and Filesystems Configure Concurrent Volume Groups and Logical Volumes © IBM Corporation 2008 . Configure Service IP Labels/Addresses Configure Application Servers Configure Volume Groups. Installation Standard Path Standard Resource Configuration Users may only configure the most common resource types NOTE: Service IP Labels/Addresses are now configured as resources Configuring a Service label is required for the "Standard Path" Configure Resources to Make Highly Available Move cursor to desired item and press Enter. Logical Volumes.

Stop one or more nodes NODE_DOWN_TAKEOVER .log Custom Test plans can be created Cluster test tool runs the following tests by default NODE_UP -Start one or more nodes NODE_DOWN_FORCED . Cluster Test Tool Simplifies cluster validation Automates testing of an HACMP cluster –Tests are carried out in sequence and analyzed by the cluster Log file /var/hacmp/log/cl_testtool.Restart a network on a node SERVER_DOWN .Stop a network on a node NETWORK_UP_LOCAL .Stop a node with takeover CLSTRMGR_KILL .catastrophic failure NETWORK_DOWN_LOCAL .Stop a node forced NODE_DOWN_GRACEFUL .Stop an application server © IBM Corporation 2008 . GSM Modem (Global System for Mobil Comm) A wireless modem that connects to a cellular network allowing a computer to connect to the net wirelessly © IBM Corporation 2008 .HACMP Allows alerts of cluster events to be sent to cell phones and pagers Easily customizable using SMIT Messages may be sent through an SMS gateway 1-555-444-9999@sms. SMS Text Messaging .

SMS Text Messaging .net] * Filename [ /usr/es/sbin/cluster/samples/pager/sample.437-1881 The @ character will send an SMS message using /usr/bin/mail The "#" will cause an SMS message to be sent wirelessly via GSM modem .437-1881# Add a Custom Remote Notification Method Type or select Values in entry fields." in the number will result in an alpha numeric page being sent .HACMP A ". Press Enter AFTER making all desired changes [Entry Fields] * Method Name [SMS_Notify] Description [ Node Down ] * Nodename(s) [ NodeA] + * Number to dial or cell phone address [ 6034442222@sms.18005552222.verizon.txt ] •Cluster Event (s) node_down + © IBM Corporation 2008 .

© IBM Corporation 2008 .

1 and 8.4) (AS 10g) Two node .hot standby DB2 . Smart Assists WebSphere 6.0.0 standalone and ND N+1 and hot standby Oracle "cold failover cluster" (CFC) Oracle app server 10g(9.UDB Enterprise Server Edition (v8.2) N+1 and hot standby DB2 software must not be installed on the share storage © IBM Corporation 2008 .

Uses Site Support for PPRC Provides support for ESS 2105-F20 and 2105-800 HACMP/XD for eRCMF (Enterprise Remote Copy Management Facility) Requires ESS eRCMF version 2.0 Uses Site support for GLVM supports cross site data replication with no distance limitation Synchronous A maximum of 2 sites © IBM Corporation 2008 .

HACMP XD:PPRC Support Peer-to peer Remote Copy HACMP coordinates Sharks to ensure failover of the environment WAN Site 1 Site 2 ESS PPRC Shark 2 Shark 1 Hardware Based Data Mirroring © IBM Corporation 2008 .

Each site contains a copy of mission-critical data. © IBM Corporation 2008 . a TCP/IP network and the RPV device driver are used for remote disk access. Instead of extremely long disk cables. Two Site HACMP Cluster With Geographic LVM TCP/IP WAN Boston Austin PV1 = hdisk7 PV3 = hdisk9 PV1 = hdisk5 PV3 = hdisk7 PV2 = hdisk8 PV4= hdisk10 PV2 = hdisk6 PV4 = hdisk8 Node A Node B PV1 PV2 PV3 PV4 PV1 PV2 PV3 PV4 Real Copy #1 Virtual Copy #2 Virtual Copy #1 Real Copy #2 One volume group actually spans both sites.

More Information HACMP System Administration l: Planning and Implementation HACMP System Administration ll: Administration and Problem Determination HACMP System Administration III: Virtualization and Disaster Recovery HACMP Problem Determination and Recovery HACMP Certification Workshop (2 days) AM050 HACMP High Availability Products for pSeries Overview (2 days) http://www.html © IBM Corporation 2008 .com/servers/aix/library and Questions about HACMP .com/servers/eserver/pseries/library/hacmp_docs.