Eric Hess
IBM Power Systems, Advanced Technical Support - Americas
February 2009
Eric Hess, IBM 2008
1
© 2009 IBM Corporation

 Part 1 of 3 - Introduction to High Availability and Disaster Recovery o
What are your availability requirements ?
o
IBM Power Systems IBM i availability solution
 Part 2 of 3 - Introduction to IBM HA and DR Technologies o
IBM Power Systems IBM i multi- server availability solutions o o
High availability and Disaster recovery
What’s new in IBM Availability?
 Part 3 of 3 - HA and DR Technology Positioning (this module) : o
HA and DR Technology Positioning o
Availability with POWER6 and Virtualization o
Pulling it all together - next steps
The latest client-ready version of this presentation can be found in TechDocs:

IBM Internal: w3.ibm.com/support/techdocs

External: www03.ibm.com/support/techdocs/atsmastr.nsf/Web/TechDocs (or ibm.com and search ‘techdocs’)
 Partners: PartnerWorld
In Techdocs, use the search word ‘Hess’ to find this presentation
Eric Hess, IBM 2008
2
© 2009 IBM Corporation

* * * * * * * *
This page for IBM and Business Partners Only
* * * * * * * *
1.
Introduction to HA (HA Strategies & Planning for 2012 part 1 of 3) - Techtalk
2.
Introduction to IBM HA and DR Technologies (HA Strategies & Planning for 2012 part 2 of 3) – Recorded (in Techdocs)
3.
IBM Power HA Strategy
– Techtalk (Thursday Feb 19)
4.
IBM CBU Enhancements – Techtalk
5.
Technology Positioning (HA Strategies & Planning for 2012 part 3 of 3) - Techtalk
6.
IASP Enablement - Techtalk
7.
Sizing PowerHA - Techtalk
8.
Geographical Mirroring for Native IBM i applications - Recorded
9.
Geographical Mirroring for Hosted and VIOS environments - Recorded
10.
DS6000/DS8000 Copy Services HA Sizing and Considerations - Techtalk
11.
iCluster Enhancements - Techtalk
12.
What’s New in IBM i Availability
Speakers for these sessions include: Bob Gintowt, Dave Chorba, Selwyn Dickey, Steve Finnes, Fred
Robinson, Chuck Stupca, Mike Warkentin, and other experts on availability solutions and planning
 Look for email from “STG Sales Education & Events Newsletter” for Techtalk dates
 Techtalks: SmartZone for Power System Technical Training: o
IBM: http://lt.be.ibm.com/smartzone/powertech o
Partner: http://www.ibm.com/services/weblectures/smartzone/powertech
Eric Hess, IBM 2008
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© 2009 IBM Corporation

 IBM offers a growing number of single system and multi-system availability solutions, including software, OS and storage based technologies
 Assess your use of single server availability options
 All sizes of businesses should assess their business resiliency requirements o
Use methodologies such as Business Impact Analysis (BIA) to better understand exposures and what should be done about them
 IBM i and Power Systems offer 6 fundament technologies for business resiliency (native attached storage)
1.
Logical Replication software
2.
Switched IASP - Independent Auxiliary Storage Pool
3.
IBM i Geographical Mirroring via OS
4.
IBM System Storage LUN Level Switching
5.
IBM System Storage Copy Services – simple copy
6.
IBM System Storage Copy Services with IBM i
 Some HA and DR technologies are unique to the IBM i Virtual Environments o
Understand how application HA / DR requirements interact with design efforts for a virtualized solution environment
 IBM i 6.1 in conjunction with PowerHA offers dramatic HA/DR enhancements
Eric Hess, IBM 2008
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© 2009 IBM Corporation

IBM has a long time investment strategy to deliver advanced i5/OS and IBM i availability in order to meet varying client needs
1989
 Logical Replication (Partner)
 Journaling
 Disk Mirroring and RAID-5
 UPS
1999
 HABP Cluster Partnership
 OS/400 Clusters with
Logical Replication
 Remote Journaling
 Redundant power supplies
 Select concurrent maintenance
 High speed, parallel tape
Eric Hess, IBM 2008
2009
 PowerHA for IBM i
 Independent Auxiliary Storage Pools
 IBM i Geographical Mirroring
 LUN Level Switching
 IBM Copy Services Integration*
 IBM iCluster (Logical Replication)
 Remote Journaling enhancements
 RAID5/6, Hot Spare, Disk Mirroring
 Dual power connections
 Increased server resiliency
 Concurrent node maintenance
 i 6.1 Quisece for backups
 Virtual tape
 IBM Lab Services for advanced availability consulting
 Education/Services Vouchers
* IBM Storage DS6000 and DS8000
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© 2009 IBM Corporation

Eric Hess, IBM 2008
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© 2009 IBM Corporation

 DB Journaling o
Storage space and performance for any new journaling activity
 HA Journal Performance, OS Option 42 (optional) o
Can be required for any availability need if journaling has an impact on long running workloads like nightly batch
 SMAPP – System Managed Access Path Protection o
Its use directly effects recovery time of all IASP and Storage copy based solutions
 Efficient tape backup combinations o
Save While Active o
High speed tape o o o
Concurrent or parallel tape designs i 6.1 Quiesce
FlashCopy


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© 2009 IBM Corporation
Eric Hess, IBM 2008

LPAR-1
*SYSBAS
LPAR-2
*SYSBAS
Basic Switched IASPs between LPARs
IASP
5.3, 5.4 or - 6.1
PowerHA for i
Basic Switched IASPs between LPARs o
Redundant LPARs provide protection from
LPAR outage and some planned and unplanned outage requirements o
Single copy of disk cannot address disk outage or backups o
Combine with replication solutions
Switched IASP planning items: o
Primary use is for switching between LPARs o
POWER6 is last generation to support HSL, avoid
Switchable HSL towers between servers o
Is not supported by VIOS environments o
Some Single Points of Failure exist o
Server SPOFs
– use all applicable single server availability options o
Storage - single copy of disk so use better disk protections schemes
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© 2009 IBM Corporation
Eric Hess, IBM 2008

o o o
Description:
IASP based
Basic, local High Availability – stand alone or foundation for other technologies
Management and automation provided by IBM clusters or PowerHA for i
Business resiliency use: o o o o o o
Local High Availability: Some RTO and RPO benefits when Journaling and SMAPP used
Long distance Disaster Recovery: No , local LPAR solution only
Both local HA and remote DR: No, however, can be combined with replication
Planned outages: Some.
Online backups: No, may use Save-While-Active
Workload balancing: No, since this is a single disk copy and cannot be shared
Typical client environments: o
Small and medium SMB, and as a foundation in Large Enterprise
Availability and recovery characteristics: o o o
No IPL required - vary on the IASP to an active server/LPAR
RTO: 5 minutes to 1 hour depending on design and practice
RPO: Real time
Eric Hess, IBM 2008
Environments o Native IBM i 5.4 & 6.1
o IBM i 5.4 & 6.1
Hosted partitions for
AIX, Linux and IBM i
6.1* o
Windows Integration
* (IBM i 6.1 host and client only)
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© 2009 IBM Corporation

Key advantages: o o o o
Storage agnostic – works with any supported internal, external or combination
Strategic foundation, allows addition of other replication technologies as needed
Simple architecture means robust switching and simple to operate
Application change management simplicity
Key considerations: o o o
LPAR only - not strategic between servers since POWER6 is last to support HSL/RIO
Storage and I/O properly designed for uptime and performance (system pool and IASP)
Single copy of data, does not offer concurrent access to data from other server or LPAR o o o o
Typical planning and timelines:
Identify application and data objects to be replicated
Application(s) and data migration proof of concept
Storage I/O hardware planning and implementation as req.
3-6 months from planning to implementation o o o
Typical costs considerations: o
Additional storage or I/O hardware (disk, drawer, 12x, etc.)
HA Switchable Resources – OS option 41
PowerHA for i - 5761-HAS if 6.1
IASP proof of concept ( if required)
Vendors and Resources o o o o o o
Power team to lead architecture
ATS and Techline
Lab Services (fee)
Benchmark Center
GTS (fee)
IASP and PowerHA
Education
Eric Hess, IBM 2008
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© 2009 IBM Corporation

Source Target
Production
*SYSBAS
LUN
Group
(active)
5.4 and 6.1 Toolkit
HA
*SYSBAS
Switchable LUNs using native attached
DS6000/DS8000 (LPAR or Server level) o
Server level redundancy offers protection from server or LPAR outage o
Add FlashCopy to address backup windows o
Combine with continuous replication solution for advanced HA or DR o
Does not support VIOS
Eric Hess, IBM 2008
DS8000
IASP
FlashCopy
LUN
Group
(none)
IBM i Switchable LUNs
LUN Level Switching planning items: o
Good DS6000 or DS8000 skills o
Proper DS6000 or DS8000 design for performance o
Proper IASP and *SYSBAS design o
Space Efficient FlashCopy assessment o
Multipath used for critical workloads o
Lab Services consulting engagement for design, any proof of concept requirements, and implementation o
IBM i 5.4 or i 6.1
o
SMART Fibre IOA helps reduce costs
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© 2009 IBM Corporation

o o o o
Description:
Function provided by IBM clustering
Local High Availability – stand alone or combined with Switched IASPs
Automation provided by IBM i clusters
Application change management simplicity
Business resiliency use: o o o o o o
Local High Availability: Yes, RTO and RPO benefits when Journaling and SMAPP used
Long distance Disaster Recovery: No , side by side or campus distance
Both local HA and remote DR: No.
Planned outages: Most.
Online backups: Yes, with FlashCopy or SWA
Workload balancing: No, since this is a single disk copy and cannot be shared
Typical client environments: o
Small and medium SMB, and foundation in Large Enterprise
Availability and recovery characteristics: o o o
No IPL required - vary on (switch) IASP to an active server/LPAR
RTO: 5 minutes to 1 hour depending on design and practice
RPO: Real time
Environments o o o o
Native IBM i 5.4 & 6.1
IBM i 5.4 & 6.1
Hosted partitions for
AIX, Linux and IBM i
6.1
Windows Integration
DS6000 and DS8000
Eric Hess, IBM 2008
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© 2009 IBM Corporation

o o o o
Key advantages:
Cost effective, single image local HA
Simple architecture means robust switching and simple to operate
Application change management simplicity
Combines easily with DS6000 and DS8000 Copy Services and Toolkit o o o
Key considerations:
Storage and I/O properly designed for uptime and performance (system pool and IASP)
Requires additional copies, plus external storage costs versus internal
Not yet supported by PowerHA for i
Typical costs considerations: o o o o o o
Typical planning and timelines: o
Application(s) and data migration proof of concept or test
Server and DS Hardware planning and implementation as req.
3-12 months from planning to implementation
Vendors and Resources o o o o o o o
DS storage team to own
DS pre-sales, Disk Magic,
S.E. FlashCopy, etc.
Power team to lead architecture
ATS and Techline
Lab Services (fee)
Benchmark Center (fee)
GTS (fee)
IASP and System
Storage Education o
DS6000 or DS8000 costs over internal storage
Additional storage or I/O hardware (disk, HSL, 12x, etc.)
HA Switchable Resources – OS option 41
IBM i Copy Services toolkit (Lab Services)
IASP proof of concept (if required)
Eric Hess, IBM 2008
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© 2009 IBM Corporation

Source Target
LPAR-1
*SYSBAS
IBM i Geographic Mirroring
IASP IASP
5.3, 5.4, or 6.1
PowerHA for i
LPAR-1
*SYSBAS
Tape Backup
Geographic Mirroring Overview o
IBM replication at virtual storage management layer for consistent switchover o
Synchronous replication between servers o
Consistent replication of all data in IASP o
Administrative Domain (5.4 and 6.1) or Logical replication used to replication key system data o
Target can be used for backups to tape (6.1 preferred), if suspending replication is acceptable
(RPO exposure consideration)
Eric Hess, IBM 2008
Geographic Mirroring planning items: o
Provide the extra CPU and memory required to support
Geographic Mirroring environments o
Proper disk design o
Design for Performance o
Avoid disk pool I/O sharing o
Two or more network connections for performance and reliability o
Improper LAN or WAN planning will create end user performance problems o
Separate network path for cluster management o
Assess network related performance impacts when exceeding campus distance
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© 2009 IBM Corporation

o o o o
Description:
OS based solution, integrated into IBM i 5.4 and i 6.1
Local High Availability (side by side or campus)
Use stand alone or combined with Switched IASP and FlashCopy
Automation provided by IBM clusters or PowerHA for i
Business resiliency use: o o o o o o
Local High Availability: Yes, RTO and RPO benefits when Journaling and SMAPP used
Long distance Disaster Recovery: No , intended for campus or short city distance
Both local HA and remote DR: No
Planned outages: Some.
Online backups: Maybe, SWA on source, or suspend replication and use target copy
Workload balancing: No, since this is a single disk copy and cannot be shared
Typical client environments: o
Small and medium SMB, and basic needs in Large Enterprise
Availability and recovery characteristics: o o o
No IPL required - vary on (switch) IASP to an active server/LPAR
RTO: 5 minutes to 1 hour depending on design and practice
RPO: real time, if journaling and SMAPP are used
Eric Hess, IBM 2008
Environments o o o o o
Native IBM i 5.4 & 6.1
IBM i Hosted partitions for IBM i
Windows Integration
VIOS IBM i client
VIOS-Blades IBM i client
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© 2009 IBM Corporation

Key advantages: o o o
Storage agnostic – works with any supported internal, external, or virtual storage
Simple architecture means robust switching and simple to operate
Application change management simplicity
Key considerations: o o o
Synchronous replication technology limits distance
CPU, Memory and Storage I/O must be designed to support Geographical Mirroring
Detaching target for backups suspends replication - no valid HA environment during backup to tape and during the subsequent partial resynchronization.
o o o o
Typical planning and timelines:
Application(s) and data migration proof of concept or test
WAN - LAN Network design (redundancy, latency, bandwidth)
Hardware planning and implementation as req.
3-12 months from planning to implementation
Typical costs considerations: o o o o o
Additional storage or I/O hardware (disk, HSL, 12x, etc.)
HA Switchable Resources – OS option 41
PowerHA for i - 5761-HAS if 6.1
WAN or LAN hardware for capacity and performance
IASP proof of concept (if required)
Vendors and Resources o o o o o o o
Power team to lead architecture
ATS and Techline
Lab Services (fee)
Network expertise
Benchmark Center (fee)
GTS (fee)
IASP and PowerHA
Education
Eric Hess, IBM 2008
23
© 2009 IBM Corporation

Snapshots for backups,
OS and application upgrade role-backs, BI and queries
FlashCopy and Space Efficient FlashCopy
DS6000
Metro Mirror (synchronous)
For local High
Availability
DS8000
Global Mirror (asynchronous)
Distance for HA or DR
Consistency Group
For data migration, or coupled with
FlashCopy for DR
Global Copy (asynchronous copy utility)
For point in time snapshots at DR site
Incremental FlashCopy with Global Copy (point in time)
Eric Hess, IBM 2008
* Describes current native attached
DS6000 or DS8000 functions. Not all
System Storage copy services are available in an IBM i Virtualized environment
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© 2009 IBM Corporation

DS8000 DS8000
Production
Backups
Full System
Local Site
FlashCopy
Global
Mirror
FlashCopy
CG
DR
5.4, or 6.1,
Toolkit
Remote Site
Full System Copy Services - GM o
DS6000 or DS8000 (non-VIOS) o
Asynchronous replication between storage servers o
Consistent replication of all data in System ASP (ASP1) o
Not a good HA solution - relies on IPL (boot) to access copy o
Requires target system configuration changes before copy can be used o
Full system replication results in Crash Consistent copy
LUN Level Switching planning items: o
Good DS6000 or DS8000 skills o
Proper DS6000 or DS8000 design for performance o
Space Efficient FlashCopy assessment o
Proper Network assessment and design o
Multipath used for critical workloads o
Lab Services consulting engagement for design implementation o
IBM i 5.4 or i 6.1
o
SMARTIOA fiber helps reduce costs
Eric Hess, IBM 2008
Note, Full System Metro Mirror also an option, but not shown
25
© 2009 IBM Corporation

o o o o
Description:
DS6000 and DS8000
Clone copy of system and ASPs (data, OS, program products, temp work areas, etc)
Function provided by SAN subsystem software
Automation can optionally be provide by Lab Services ‘Copy Services Toolkit’ offering
Business resiliency use: o o o o o o
Local High Availability: No.
RPO and RPO benefits when Journaling and SMAPP used
Long distance Disaster Recovery: Yes
Both local HA and remote DR: No, however, can be combined with replication
Planned outages: No.
Online backups: Yes, with FlashCopy and additional LPAR
Workload balancing: Some, via offline point in time snapshots copies
Typical client environments: o
Medium SMB, and as for basic DR in Large Enterprise
Availability and recovery characteristics: o o o
IPL required – abnormal IPL likely - power off source to avoid
RTO: 30 minutes to hours
RPO: seconds - minutes based on consistency group design and network (Metro Mirror RPO = 0)
Eric Hess, IBM 2008
Environments o o o o
Native IBM i 5.4 &
6.1
IBM i Hosted partitions
Windows Integration
Does not support
VIOS
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© 2009 IBM Corporation

o o o o
Key advantages:
Can meet moderate DR requirements
No object out of sync issues
Incorporates into cross platform storage DR solutions
Application change management simplicity
Key considerations: o o o
Unable to address planned outages (changes on target cannot be propagated to source)
Replicates temp data so it uses the largest amount of network capacity of all solutions
Requires additional copies, plus external storage costs versus internal o o o
Typical planning and timelines:
Server and DS Hardware planning and implementation as req.
WAN Network design (latency, bandwidth)
3-12 months from planning to implementation o o o o o
Typical costs considerations:
DS6000 or DS8000 costs over internal storage
Extra copies of disk required for backups and Global Mirror
DS6000 or DS8000 Copy Services software
Lab Services Copy Services toolkit
WAN or LAN hardware for capacity and performance
Vendors and Resources o o o o o o o
Storage team to own presales for Disk Magic, S.E.
FlashCopy, network planning, etc.
Power team to lead architecture
ATS and Techline
Lab Services (fee)
Benchmark Center (fee)
GTS (fee)
IBM DS8000 Education
Eric Hess, IBM 2008
27
© 2009 IBM Corporation

DS8000 DS8000
Production
DR and Test
*SYSBAS
IASP Metro
Mirror
IASP
*SYSBAS
Backup
FlashCopy
*SYSBAS
5.4, or 6.1, Toolkit,
PowerHA
Local Site
Combination DS6000-DS8000 Copy Services cluster solution example
PowerHA or Copy Services Toolkit - MM o
DS6000 or DS8000 (non-VIOS) o o o
Synchronous replication between storage servers
Consistent replication of all data in System ASP (ASP1)
Advanced HA and Backup solution – no IPL required o
Combine with Switched LUNs, other Copy Services, 6.1
Quiesce , etc.
o
Consistent replication of all data in IASP o
Administrative Domain (5.4 and 6.1) or Logical replication used to replication key system data
LUN Level Switching planning items: o
Good DS6000 or DS8000 skills o
Proper DS6000 or DS8000 design for performance o
Space Efficient FlashCopy assessment o
Proper Network assessment and design o
Multipath used for critical workloads o
Lab Services consulting engagement for design implementation o
PowerHA for i or Toolkit o
IBM i 5.4 or i 6.1
o
SMARTIOA fiber helps reduce costs
Eric Hess, IBM 2008
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© 2009 IBM Corporation

Production
*SYSBAS
HA
*SYSBAS
PowerHA or Copy Services Toolkit Combination o
Global Mirror examples: o o o
DS6000 or DS8000 (non-VIOS)
Synchronous or asynchronous replication between storage servers
Advanced HA, DR and Backup solution o
Local Switched LUNs for HA o
Local FlashCopy with 6.1 Quisce for nightly backups o
Global Mirror for advanced DR across long distances o
Optional ‘D’ copy at remote site allows uninterrupted HA or DR test o
Many other combinations possible
LUN
Group
(active)
DS8000 DS8000
Consistency
Group
LUN
Group
(none)
IASP
Global
Mirror
IASP
Production
*SYSBAS
FlashCopy
Local Site
Optional
Golden
(D) Copy
DR Site
5.4, or 6.1,
Toolkit,
PowerHA
Note: *SYSBAS disks are logical representations only, and may be disks located within the DS6000 or DS8000
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© 2009 IBM Corporation
Eric Hess, IBM 2008


o
Only IASP data is replicated o
Examples show significant ongoing network cost savings using IASPs with asynchronous SAN copy services o
Previous experience suggests that a
300Mbs network between sites for full system replication can be reduced to
90Mbs by using IASPs o
IASP based cluster solutions provide the best RTO and RPO, with lower network costs www.systeminetwork.com
Business Continuity with External Storage-
Article ID: 20782
Eric Hess, IBM 2008
5250 Interactive Application
SAP Application
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© 2009 IBM Corporation

o o o o
Description:
DS6000 and DS8000
Storage level replication function provided by SAN subsystem software
IASP based for more granular replication
Automation provided by PowerHA or Toolkit
Business resiliency use: o o o o o o
Local High Availability: Yes, RTO and RPO benefits when Journaling and SMAPP used
Long distance Disaster Recovery: Yes.
Both local HA and remote DR: Yes, using combinations
Planned outages: Yes.
Online backups: Yes, with FlashCopy or Save-While-Active
Workload balancing: Some, via offline point in time snapshots copies
Typical client environments: o
Medium SMB, Large Enterprise (usually too costly for small SMB)
Availability and recovery characteristics: o o o
No IPL required - vary on (switch) IASP to an active server/LPAR
RTO: 5 minutes to hour depending on design and practice
RPO: Real time, if journaling and SMAPP are used
Eric Hess, IBM 2008
Environments o o o o
Native IBM i 5.4 &
6.1
IBM i Hosted partitions
Windows Integration
Does not support
VIOS
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© 2009 IBM Corporation

o o o o o o
Key advantages:
Can meet advanced HA, DR and backup requirements
Fully integrated into IBM i via PowerHA or Toolkit – unique to IBM storage solutions
No object out of sync issues, robust switching and simple to operate
Incorporates into cross platform storage DR solutions
Application change management simplicity
Large number of installation and extensive IBM experience and skills
Key considerations: o o o
Costs – GM requires additional copies, plus external storage costs versus internal issues
DS6000 or DS8000 skills as required
Move to IASPs o o o o
Typical planning and timelines:
Application(s) and data migration proof of concept or test
Identify application and data objects to be replicated
6-18 months from planning to implementation
Storage I/O hardware planning and implementation as req.
o o o o o
Typical costs considerations:
DS6000 or DS8000 costs over internal storage
Extra copies of disk required for backups and Global Mirror
PowerHA for i and/or Copy Services software
Lab Services Copy Services toolkit
WAN or LAN hardware for capacity and performance
Vendors and Resources o o o o o o o
Storage team to own pre-sales for Disk Magic,
S.E. FlashCopy, network planning, etc.
Power team to lead architecture
ATS and Techline
Lab Services (fee)
Benchmark Center (fee)
GTS (fee)
IASP, PowerHA and
Storage Education
Eric Hess, IBM 2008
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© 2009 IBM Corporation

Source
Production
Data
3 rd party software
IBM i Remote Journaling
Management and Control
DB and Non-DB objects
Typical Logical Replication Infrastructure
Backup
Copy
Apply
Process
Target
Tape Backup
5.4 or 6.1
Logical Replication Overview o
IBM Remote Journaling is used for replication of
DB and other object types o
Vendor unique logic provides replication for other objects types or other DB needs o
Vendor provides management and control o
Target copy is available for read-only workload o
Higher tier products can support broadcast replication to 2 or more copies
Logical Replication planning items: o o
Are skills are in place to plan, implement, operate and maintain
Do not use ‘replicate everything’ design planning approach o
Poor application change management will cause out of sync issues o
For critical HA, limit use of target read-only copy o
High I/O queries can delay the apply process o
Add 3 rd copy if needed o
Understand backup requirements o
A target copy backup with SWA by itself does not replace the need to quiesce source server applications or users
Eric Hess, IBM 2008
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© 2009 IBM Corporation

Description: o o o o
Add-on vendor software – does not require any optional OS features
Journal (logging) based replication and management (journaling required)
Replication by object
Automation provided by ISV. Use of IBM base cluster in complex designs suggested
Business resiliency use: o o o o o o
Local High Availability: Yes , with RPO benefits from synchronous Remote Journaling
Long distance Disaster Recovery: Yes , via journaling or asynch Remote Journaling
Both local HA and remote DR: Yes , multiple copies via cascade or broadcast options
Planned outages: Most .
Online backups: Yes, replication may continue, while apply process on B/U is halted
Workload balancing: Some , via concurrent access and proper planning and controls
Typical client environments: o
Small SMB, medium SMB, and Large Enterprise
Availability and recovery characteristics: o o o
No IPL required. Wait for apply process on B/U to complete.
RTO: 15 minutes to small hours depending on design, practice
RPO: near real time to minutes based on date type, activity, distance
Environments o All environments, including VIOS
Eric Hess, IBM 2008
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© 2009 IBM Corporation

Key advantages: o o o o
Storage agnostic – works with any supported internal, external or combination
Only solution to offer concurrent access to data on target
Able to support simultaneous replication to local HA and remote DR copies
Smaller network bandwidth required than other solutions
Key considerations: o o o
Tends to require more monitoring, operations and development team resources
Target RPO can fall behind during write intensive batch jobs or during backups on target
Some applications can be problematic in keeping data synchronized
Typical planning and timelines: o o o o
Journal and vendor product planning
Identify application and data objects to be replicated
3-12 months from planning and implementation
Must be fully tested on a regular basis (e.g. 3-6 months)
Typical costs considerations: o o o o o
Vendor software and options
Operations resource to monitor daily
Proper network
Education and services for proper design and implementation
HA Journal Performance Option 42 might be needed
Eric Hess, IBM 2008
Vendors and Resources
IBM iCluster o www.ibm.com/systems/p ower/software/availability
Vision Solutions o www.visionsolutions.com
Maximum Availability noMAX o www.maxava.com
Trader’s Quick-Edd o www.quick-softwareline.com
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© 2009 IBM Corporation

 Provides choices in design, implementation and management of IBM i 6.1 and SAN
Storage IASP Cluster based replication technologies for HA and DR
a.k.a HASM
“HA Switchable Resources” - option 41 – IBM i
Geographic Mirroring
•
IBM i storage mgmt page level replication
•
Synchronous
• Any internal or external storage
•
Metro Mirror (SAN)*
•
SAN hardware replication
Synchronous
•
IBM SAN storage only
•
Global Mirror (SAN)*
•
SAN hardware replication
Asynchronous
•
IBM SAN storage only
•
•
FlashCopy (SAN)*
•
SAN hardware replication
Point in time
IBM SAN storage only
* This new support and capability added to IBM i and XSM with PowerHA and 6.1, IBM SAN Only
See www.redbooks.ibm.com: Implementing PowerHA for IBM I - SG24-7405-00 (Nov 2008)
Eric Hess, IBM 2008
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© 2009 IBM Corporation

Functions
IBM i operating system product
(PowerHA LPP )
Requires PowerHA LPP
PowerHA for i
Yes
N/A
Cluster switch/failover
Start/Stop FlashCopy
Yes
Yes
Health check provided
Resets multipath for disk registration on switchover
Automates cluster node starting for switchover/FlashCopy
Supports IBM i5.4
Automate queise function
Yes
Yes
No
No
No
Provides DS scripts for replication
Full System or non IBM i replication management
Provides CL programming interface for
IBM storage
Yes
No
No
Eric Hess, IBM 2008
Eric Hess, IBM 2008
Toolkit ( stand alone environment )
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes- via tool kit release which supports PowerHa
Yes
Yes
Yes
Yes
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© 2009 IBM Corporation

Eric Hess, IBM 2008
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© 2009 IBM Corporation

 VIOS (hosting IBM i partition) - Power servers and IBM Power blades o
IBM and ISV Logical Replication o
IBM i XSM Geographical Mirroring (PowerHA) with DS4000 or SVC o
IBM Storage Copy Services (full copy, manual process only) o
DS4000 Point in time copy: FlashCopy or Volume Copy o o
DS4000 Continuous copy: Synchronous Enhanced Remote Mirroring (Metro Mirror)
SVC Copy Services (SAN Volume Controller)
 Notes o o
PowerHA for i does not support copy services of DS4000 or SVC
Lab Services ‘Copy Services Toolkit’ does not support copy services of DS4000 or SVC o o o o
Full-system FlashCopy and VolumeCopy requires that the production IBM i logical partition
(LPAR) be powered off or in a restricted state
New 6.1 ‘Quiesce’ function not supported with DS4000 or SVC copy services
See planning documentation for other planning items and restrictions
IBM i and Midrange External Storage
• www.redbooks.ibm.com/abstracts/sg247668.html?Open
• IBM i Virtualization and DS4000 Read-me First (October 20th, 2008)
• www-03.ibm.com/systems/resources/systems_i_os_i_virtualization_and_ds4000_readme.pdf
Eric Hess, IBM 2008
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© 2009 IBM Corporation

Eric Hess, IBM 2008
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© 2009 IBM Corporation

 Generalizations (e.g. categorizing into major problem sets) can distort the answer
 Should use as a guide to potentially rule out certain solution types
 In practice, consider all major and supporting decision factors such as: o o o o o o o o o o o
Up time requirements
Recovery time objective
Recovery point objective
Resilience requirements
Concurrent access requirements
Geographic dispersion requirements
Tolerance for end user disruption
Outage type coverage
Experience, skills and resources
Cost and budget
Service and support i5/OS High Availability Clusters:
Data Resilience Solutions
Document Version 1.0
Version date: October 22, 2004
Authors:
Steven J Finnes
Robert T Gintowt
Michael J Snyder
© Copyright IBM Corporation 2004.
All rights reserved.
See Redpaper redp0888: www.redbooks.ibm.com
Eric Hess, IBM 2008
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© 2009 IBM Corporation

* * * * * * * *
This page for IBM and Business Partners Only
* * * * * * * *
1.
Introduction to HA (HA Strategies & Planning for 2012 part 1 of 3) - Techtalk
2.
Introduction to IBM HA and DR Technologies (HA Strategies & Planning for 2012 part 2 of 3) – Recorded (in Techdocs)
3.
IBM Power HA Strategy
– Techtalk (Thursday Feb 19)
4.
IBM CBU Enhancements – Techtalk
5.
Technology Positioning (HA Strategies & Planning for 2012 part 3 of 3) - Techtalk
6.
IASP Enablement - Techtalk
7.
Sizing PowerHA - Techtalk
8.
Geographical Mirroring for Native IBM i applications - Recorded
9.
Geographical Mirroring for Hosted and VIOS environments - Recorded
10.
DS6000/DS8000 Copy Services HA Sizing and Considerations - Techtalk
11.
iCluster Enhancements - Techtalk
12.
What’s New in IBM i Availability
Speakers for these sessions include: Bob Gintowt, Dave Chorba, Selwyn Dickey, Steve Finnes, Fred
Robinson, Chuck Stupca, Mike Warkentin, and other experts on availability solutions and planning
 Look for email from “STG Sales Education & Events Newsletter” for Techtalk dates
 Techtalks: SmartZone for Power System Technical Training: o
IBM: http://lt.be.ibm.com/smartzone/powertech o
Partner: http://www.ibm.com/services/weblectures/smartzone/powertech
Eric Hess, IBM 2008
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© 2009 IBM Corporation

IBM i High Availability Strategies & Planning for 2012
Part 3 of 3
Eric Hess, texas@us.ibm.com
IBM 2009
Eric Hess, IBM 2008
Technical Sales
Support Americas
45
© 2009 IBM Corporation

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