Ibm Hacmp Aix 5l

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Proven availability for an on demand environment

HACMP for AIX 5L

Simpler. Faster. Goes the Distance.

Highlights

■ Helps reduce unplanned

outages and improve system

availability

■ Offers ease of use through

configuration wizards, auto-

discovery and a Web-based

interface

■ Backup systems can be located

at a remote site for geographic

disaster recovery

■ Provides failover on demand to

enable system maintenance

without service interruption.

Need for high availability

Throughout the day – often 24 hours a

day – IT systems are hard at work. But

what happens when the systems or

applications fail? It is widely

documented that unplanned outages

increase the total cost of IT ownership.

In fact, surveys indicate that an outage

can cost from several thousand to over

a million pounds per hour, and some

businesses virtually shut down if their

systems fail. And although hardware

has become very reliable, research

shows that unplanned outages still

occur and typically result from operator

error, software bugs, environmental

conditions and so forth – problems thatreliable hardware cannot prevent. Even

planned outages for application and

system maintenance can impact

business performance or delay

necessary updates. Service availability

is critical to a reliable, cost-effective IT

infrastructure. At the same time, clients

want solutions that simplify the IT

environment and enable the flexibility to

respond to changing business needs.



IBM’s premier availability solution

IBM High Availability Cluster

Multiprocessing for AIX 5L V5.3

(HACMP V5.3) helps protect critical

business applications from failures. For

over a decade, HACMP has been

providing reliable monitoring, failure

detection and automated recovery of

business application environments to

backup resources. And the HACMP/XD

(Extended Distance) component

extends failover to backup resources at

remote sites to ensure reliable service

delivery even if a disaster disables the

primary site. HACMP/XD provides

remote failover for Enterprise Storage

Server (ESS) and SAN Volume

Controller Metro-Mirror (formerly Peer-

to-Peer Remote Copy – PPRC) peers

and unlimited distance failover for IP-

connected peers using proven AIX 5L

mirroring technology. When HACMP

detects a failure, it can quickly and

automatically take action to restore the

application, restarting it on a redundant

system if necessary. If the backup

system is at a remote site, HACMP can

also switch to a mirror (replicated) copy

of the application data automatically

and reverse the mirroring process. This

minimises expensive downtime for both

planned and unplanned outages and

provides flexibility to accommodate

changing business needs.

HACMP can be configured to react to

hundreds of system events including

problems that are not severe enough to

interrupt proper system operation (such

as process failure or exhaustion of

system resources). HACMP monitors,

detects and reacts to such conditions,

maintaining service availability during

random, unexpected software

problems. Up to 32 servers can

participate in an HACMP cluster – ideal

for environments requiring scale-out

growth with rock-solid reliability.

HACMP can also virtually eliminate

planned outages by transferring users,

applications and data to backup

systems during scheduled

maintenance. HACMP clusters can be

configured to meet complex and varied

application availability and recovery

needs.

Business continuity and disaster recovery

with HACMP/XD

HACMP/XD, an optional feature of

HACMP, is essential for clients who

wish to protect themselves from site-

wide failures or large-scale disasters by

mirroring business-critical data across

sites and enabling failover to these

remote sites. This applies to businesses

of any size with multiple sites or

regional operations or wherever

decentralisation of data is desired.

HACMP/XD offers multiple technologies

for achieving long distance data

mirroring, failover and

resynchronisation.

● HACMP/XD’s new Geographic

Logical Volume Manager (GLVM)

provides remote data mirroring and

enables failover to remote sites

using the mirrored data. GLVM’s

IP-based mirroring automatically

maintains a data replica across

geographically remote sites and

completely manages data

synchronisation during production, failover and recovery. By

integrating with AIX 5L’s native

Logical Volume Manager, GLVM

minimises the need for separate

configuration and management



● HACMP/XD supports ESS/Metro-

Mirror, enabling automatic failover

of disks that are Metro-Mirror pairs

and creating a powerful solution for

clients on ESS with Metro-Mirror.

By automating the management of

Metro-Mirror, recovery time isminimised after an outage

regardless of whether the clustered

environment is local or

geographically dispersed.

HACMP/XD in combination with

Metro-Mirror manages a clustered

environment to ensure mirroring of

critical data is maintained at all

times● HACMP/XD also supports IBM TotalStorage PPRC/Metro-

Mirror for SAN Volume Controller

which can improve disaster

recovery and business continuance

capabilities by applying and

managing copy services across

disparate disk storage devices

within the SAN ● HACMP/XD support of the

enterprise Remote Copy Management Facility (eRCMF) for

ESS/Metro-Mirror allows users to

take advantage of the hardware’s

simplified configuration steps

through eRCMF and still provides

automatic recovery of disk failures

in a Metro-Mirror peer environment● In addition to the new GLVM,

HACMP/XD retains HAGEO for

unlimited distance, IP-based

mirroring.

High availability cluster enhancements

HACMP is tightly integrated with AIX 5L

to exploit some of its most powerful

features. New features and

enhancements make HACMP:

SIMPLER to configure and more

flexible to maintain:

● The Two-node Configuration

Wizard configures a cluster in four

easy steps● The Online Planning Worksheet

tools walks you through the cluster

configuration process and lets you

plan and update the corresponding

cluster automatically ● The Cluster Test Tool allows the

evaluation of cluster behaviour

under a set of specified

circumstances● Enhanced security mechanisms

protect the integrity and operation

of a cluster ● Web-based cluster management

enables configuration, monitoring

and management of a cluster froma Web browser

● Automated nightly cluster

verification reduces the risk that a

change to the cluster may interfere

with future cluster operation or

failover ● HACMP File Collections provide an

easy way to maintain file

synchronisation across a cluster

● The optional feature HACMP

Smart Assist package simplifies the

implementation of HACMP in DB2.

Oracle and WebSphere

environments by reading the

application configuration data and

configuring HACMP accordingly, providing all the necessary

application monitors, start/stop

scripts and so forth. All three

Smart Assists are included in one

inexpensive package● Support for Veritas File System to

simplify implementation in VGS

environments.

FASTER event processing and

application recovery:

● Improved policy-based cluster

manager intelligently and

automatically responds to failures

and removes the need for script-

based management● Up to 40 percent faster failover

than HACMP V5.1 in basic clusters,

minimising application downtime1

● Streamlined resource movement by

the cluster manager enables faster

response to failures● The ability to define cluster-wide

dependencies streamlines and

simplifies failover of complex, multi-

tier applications.



Goes the Distance to provide disaster

recovery across multiple sites:

● AIX 5L Logical Volume Manager

split mirroring for disaster recovery

in SAN environments

● The optional HACMP/XD feature provides a portfolio of tools that

perform automatic recovery of

hardware and software failures

across disparate geographic

distances. New additions to the

portfolio include:

– GLVM which provides remote

data mirroring and failover

– Support for enterprise Remote

Copy Management Facility (eRCMF) with ESS/Metro-

Mirror

– Support for IBM TotalStorage

Metro-Mirror (PPRC) for SAN

Volume Controller

– New capabilities to manage

remote sites and disaster

recovery more easily.

Capacity BackUp for business continuity

For selected high-end IBM POWER4

and POWER5 processor-based servers,

a specially configured and priced

Capacity BackUp system is available for

installation at a remote site. The server

contains a minimum number of active

processors and a large number of

inactive Capacity on Demand (CoD)

processors that can be temporarily

activated when needed for disaster

recovery. HACMP can automatically

detect the loss of the production

system and activate the Capacity

BackUp system to roll client-critical

applications over to as many CoD

processors as needed to keep the

business running with minimal loss

of service.

Complementary cluster software

IBM also offers a broad range of

additional tools to aid in efficiently

building, managing and expanding

high-availability clusters in AIX 5L

environments. These include:

● Cluster Systems Management

(CSM) for AIX 5L provides a

powerful tool to manage multiple

machines from a single point-of-

control. Cluster management

capabilities include system

configuration, software distribution

and maintenance, hardware

control, remote command execution,

diagnostics and system monitoring with automated problem responses

● General Parallel File System

(GPFS) for AIX 5L is a high-

performance, shared-disk file system

using standard UNIX ® file system

interfaces and providing concurrent

access to data from all nodes in a

cluster. GPFS currently powers

several of the world’s most powerful

supercomputers and holds theTerabyte Sorting performance

record.2 In addition, GPFS can be

configured to provide extremely

high reliability by eliminating many

single points-of-failure (which are

typical of network and SAN file

systems)



● Workload Manager for AIX 5L

provides resource balancing

between applications● Tivoli Storage Manager provides

enterprise management of backup

and recovery to tape or disk.

New generation of on demand servers

HACMP runs under the AIX 5L

operating system on the IBM_`

p5,_` i5 and pSeries families –

the servers of choice for UNIX operating

system-based business-critical

applications. These servers offer the

performance, availability, scalability and

infrastructure management demanded

by today’s growing on demand

business environments. They combine

the benefits of IBM Power Architecture

processors and mainframe-inspired

RAS (reliability, availability, serviceability)

with AIX 5L for efficient handling of

mission-critical applications.

The IBM_` family of servers

feature innovative technology,

outstanding performance, logical

partitioning, outstanding scalability and

availability, broad support of open

standards for application flexibility and a

full range of tools to manage IT

infrastructure in an on demand world.

Gaining the IBM advantage

High availability solutions from a single

vendor provide clients the confidence

that comes from integrated design and

testing. This reduces the risk of failures

resulting from combining disparate

components from multiple vendors and

can be a critical factor for business

environments. IBM high availability

solutions provide the advantage of

_` p5,_` i5 and pSeries

servers, the AIX 5L operating system,

IBM TotalStorage offerings and

HACMP solutions.

The IBM_` family is backed by

comprehensive offerings and resources

that provide value at every stage of IT

implementation. These include High

Availability Cluster Implementation

Services, an offering which provides

basic and customised assistance for

installation of HACMP clusters. This

service is customisable with the

following elements:

● High Availability Cluster Proof of Concept Review

● Planning and design of an

Availability Cluster ● Installation and configuration of an

Availability Cluster ● Application integration assistance● Development and execution of a

Cluster Test Plan● Enhanced monitoring and reporting

setup● Operations planning and operations

documentation development● Migration/upgrades services.

Based on an assessment of the

complete system environment,

IBM availability experts can design a

client solution to meet the target

availability level for on demand

business needs.



For more information

To learn more about the HACMP for

AIX 5L on the IBM_` p5,

_` i5 and pSeries server families,

contact your IBM marketing

representative or IBM Business Partner

or visit the following Web sites:

● ibm.com /servers/eserver/

pseries/ha

● ibm.com /servers/eserver/

clusters/software

● ibm.com /servers/aix

● ibm.com /iseries/aix

● ibm.com /common/ssi

PSD00109-GBEN-03

05-PSE-001079 (KH 08/05)

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1 Based on study for IBM by Lakeview

Technologies; May, 2004.

2 Details available at:

http://www.almaden. ibm.com /

StorageSystems/file_systems/GPFS/

gpfs-spsort.shtml

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