© 2009 ibm corporation 1 eric hess, ibm 2008 ibm power systems - ibm i high availability strategies...
TRANSCRIPT
© 2009 IBM Corporation
1Eric Hess, IBM 2008
IBM Power Systems - IBM i High Availability Strategies & Planning for 2012
Part 3 of 3 - Part 3 of 3 - HA and DR Technology Positioning
Eric HessIBM Power Systems, Advanced Technical Support - AmericasFebruary 2009
© 2009 IBM Corporation
2Eric Hess, IBM 2008
Part 1 of 3 - Introduction to High Availability and Disaster Recoveryo What are your availability requirements ?o IBM Power Systems IBM i availability solution
Part 2 of 3 - Introduction to IBM HA and DR Technologieso IBM Power Systems IBM i multi- server availability solutionso High availability and Disaster recoveryo What’s new in IBM Availability?
Part 3 of 3 - HA and DR Technology Positioning (this module):o HA and DR Technology Positioningo Availability with POWER6 and Virtualizationo Pulling it all together - next steps
Agenda - High Availability Strategies & Planning for 2012
The latest client-ready version of this presentation can be found in TechDocs: IBM Internal: w3.ibm.com/support/techdocs External: www-03.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
© 2009 IBM Corporation
3Eric Hess, IBM 2008
Additional Events1. 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
* * * * * * * * This page for IBM and Business Partners Only * * * * * * * *
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
Techtalks: SmartZone for Power System Technical Training:oIBM: http://lt.be.ibm.com/smartzone/powertechoPartner: http://www.ibm.com/services/weblectures/smartzone/powertech
Look for email from “STG Sales Education & Events Newsletter” for Techtalk dates
© 2009 IBM Corporation
10Eric Hess, IBM 2008
Recap of Part 1 and Part 2
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 software2. Switched IASP - Independent Auxiliary Storage Pool 3. IBM i Geographical Mirroring via OS4. 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 Environmentso 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
© 2009 IBM Corporation
11Eric Hess, IBM 2008
Power Systems IBM i Availability Solutions
IBM has a long time investment strategy to deliver advanced i5/OS and IBM i availability in order to meet varying client needs
1989
1999
2009
Logical Replication (Partner) Journaling Disk Mirroring and RAID-5 UPS
HABP Cluster Partnership OS/400 Clusters with
Logical Replication Remote Journaling Redundant power supplies Select concurrent
maintenance High speed, parallel tape
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
© 2009 IBM Corporation
12Eric Hess, IBM 2008
Technology Positioning
Multi-Server Availability Solutions
© 2009 IBM Corporation
14Eric Hess, IBM 2008
Common Planning Items and Costs
DB Journalingo 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 combinationso Save While Activeo High speed tapeo Concurrent or parallel tape designso i 6.1 Quiesceo FlashCopy
Second server or LPAR related hardware Related vendors technology education and services
© 2009 IBM Corporation
15Eric Hess, IBM 2008
PowerHA and IBM i Switched IASPs
5.3, 5.4 or - 6.1 PowerHA for i
LPAR-1
*SYSBAS
LPAR-2
*SYSBAS
Basic Switched IASPs between LPARs
Basic Switched IASPs between LPARso 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
IASP
Switched IASP planning items:o Primary use is for switching
between LPARso 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
© 2009 IBM Corporation
16Eric Hess, IBM 2008
Switched IASPs (1-2)
o No IPL required - vary on the IASP to an active server/LPAR o RTO: 5 minutes to 1 hour depending on design and practiceo RPO: Real time
o Native IBM i 5.4 & 6.1o 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)
o IASP basedo Basic, local High Availability – stand alone or foundation for other technologieso Management and automation provided by IBM clusters or PowerHA for i
Description:
o Local High Availability: Some RTO and RPO benefits when Journaling and SMAPP usedo Long distance Disaster Recovery: No, local LPAR solution onlyo Both local HA and remote DR: No, however, can be combined with replication o Planned outages: Some.o Online backups: No, may use Save-While-Activeo Workload balancing: No, since this is a single disk copy and cannot be shared
Business resiliency use:
Typical client environments:
o Small and medium SMB, and as a foundation in Large Enterprise
Availability and recovery characteristics:
Environments
© 2009 IBM Corporation
17Eric Hess, IBM 2008
Switched IASPs (2-2)
o Additional storage or I/O hardware (disk, drawer, 12x, etc.)o HA Switchable Resources – OS option 41 o PowerHA for i - 5761-HAS if 6.1o IASP proof of concept ( if required)
o Storage agnostic – works with any supported internal, external or combinationo Strategic foundation, allows addition of other replication technologies as neededo Simple architecture means robust switching and simple to operateo Application change management simplicity
Key advantages:
o LPAR only - not strategic between servers since POWER6 is last to support HSL/RIOo Storage and I/O properly designed for uptime and performance (system pool and IASP)o Single copy of data, does not offer concurrent access to data from other server or LPAR
Key considerations:
Typical planning and timelines:
o Identify application and data objects to be replicatedo Application(s) and data migration proof of concepto Storage I/O hardware planning and implementation as req.o 3-6 months from planning to implementation
Typical costs considerations:
Vendors and Resources
o Power team to lead architecture
o ATS and Techlineo Lab Services (fee)o Benchmark Centero GTS (fee)o IASP and PowerHA
Education
© 2009 IBM Corporation
18Eric Hess, IBM 2008
IBM i and System Storage LUN Level Switching
IASP
TargetSource
5.4 and 6.1 Toolkit
Production
*SYSBAS
HA
*SYSBAS
LUN Group (active)
LUN Group (none)
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 windowso Combine with continuous replication solution for
advanced HA or DRo Does not support VIOS
IBM i Switchable LUNs
DS8000LUN 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 6.1o SMART Fibre IOA helps
reduce costs
FlashCopy
© 2009 IBM Corporation
19Eric Hess, IBM 2008
LUN Level Switching(1-2)
o No IPL required - vary on (switch) IASP to an active server/LPAR o RTO: 5 minutes to 1 hour depending on design and practiceo RPO: Real time
o Native IBM i 5.4 & 6.1o IBM i 5.4 & 6.1
Hosted partitions for AIX, Linux and IBM i 6.1
o Windows Integrationo DS6000 and DS8000
o Function provided by IBM clusteringo Local High Availability – stand alone or combined with Switched IASPso Automation provided by IBM i clusterso Application change management simplicity
Description:
o Local High Availability: Yes, RTO and RPO benefits when Journaling and SMAPP usedo Long distance Disaster Recovery: No, side by side or campus distanceo Both local HA and remote DR: No.o Planned outages: Most.o Online backups: Yes, with FlashCopy or SWAo Workload balancing: No, since this is a single disk copy and cannot be shared
Business resiliency use:
Typical client environments:
o Small and medium SMB, and foundation in Large Enterprise
Availability and recovery characteristics:
Environments
© 2009 IBM Corporation
20Eric Hess, IBM 2008
LUN Level Switching(2-2)
o DS6000 or DS8000 costs over internal storage o Additional storage or I/O hardware (disk, HSL, 12x, etc.)o HA Switchable Resources – OS option 41 o IBM i Copy Services toolkit (Lab Services)o IASP proof of concept (if required)
o Cost effective, single image local HAo Simple architecture means robust switching and simple to operateo Application change management simplicityo Combines easily with DS6000 and DS8000 Copy Services and Toolkit
Key advantages:
o Storage and I/O properly designed for uptime and performance (system pool and IASP)o Requires additional copies, plus external storage costs versus internalo Not yet supported by PowerHA for i
Key considerations:
Typical planning and timelines:
o Application(s) and data migration proof of concept or testo Server and DS Hardware planning and implementation as req.o 3-12 months from planning to implementation
Typical costs considerations:
Vendors and Resources
o DS storage team to own DS pre-sales, Disk Magic, S.E. FlashCopy, etc.
o Power team to lead architecture
o ATS and Techlineo Lab Services (fee)o Benchmark Center (fee)o GTS (fee)o IASP and System Storage
Education
© 2009 IBM Corporation
21Eric Hess, IBM 2008
PowerHA and XSM Geographic Mirroring
IBM i Geographic Mirroring
IASP
Target
5.3, 5.4, or 6.1 PowerHA for i
Tape Backup
IASP
Source
LPAR-1
*SYSBAS
LPAR-1
*SYSBAS
Geographic Mirroring planning items:
o Provide the extra CPU and memory required to support Geographic Mirroring environments
o Proper disk designo Design for Performanceo 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
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)
© 2009 IBM Corporation
22Eric Hess, IBM 2008
Geographic Mirroring (1-2)
o No IPL required - vary on (switch) IASP to an active server/LPAR o RTO: 5 minutes to 1 hour depending on design and practiceo RPO: real time, if journaling and SMAPP are used
o Native IBM i 5.4 & 6.1o IBM i Hosted
partitions for IBM io Windows Integrationo VIOS IBM i cliento VIOS-Blades IBM i
client
o OS based solution, integrated into IBM i 5.4 and i 6.1o Local High Availability (side by side or campus)o Use stand alone or combined with Switched IASP and FlashCopyo Automation provided by IBM clusters or PowerHA for i
Description:
o Local High Availability: Yes, RTO and RPO benefits when Journaling and SMAPP usedo Long distance Disaster Recovery: No, intended for campus or short city distanceo Both local HA and remote DR: Noo Planned outages: Some.o Online backups: Maybe, SWA on source, or suspend replication and use target copyo Workload balancing: No, since this is a single disk copy and cannot be shared
Business resiliency use:
Typical client environments:
o Small and medium SMB, and basic needs in Large Enterprise
Availability and recovery characteristics:
Environments
© 2009 IBM Corporation
23Eric Hess, IBM 2008
Geographic Mirroring (2-2)
o Additional storage or I/O hardware (disk, HSL, 12x, etc.)o HA Switchable Resources – OS option 41 o PowerHA for i - 5761-HAS if 6.1o WAN or LAN hardware for capacity and performanceo IASP proof of concept (if required)
o Storage agnostic – works with any supported internal, external, or virtual storageo Simple architecture means robust switching and simple to operateo Application change management simplicity
Key advantages:
o Synchronous replication technology limits distanceo CPU, Memory and Storage I/O must be designed to support Geographical Mirroringo Detaching target for backups suspends replication - no valid HA environment during
backup to tape and during the subsequent partial resynchronization.
Key considerations:
Typical planning and timelines:
o Application(s) and data migration proof of concept or testo WAN - LAN Network design (redundancy, latency, bandwidth)o Hardware planning and implementation as req.o 3-12 months from planning to implementation
Typical costs considerations:
Vendors and Resources
o Power team to lead architecture
o ATS and Techlineo Lab Services (fee)o Network expertiseo Benchmark Center (fee)o GTS (fee)o IASP and PowerHA
Education
© 2009 IBM Corporation
24Eric Hess, IBM 2008
DS6000
DS8000Snapshots for backups, OS and application upgrade role-backs, BI and queries
Peer
To
Peer
Rem
ote
Copy
(con
tinuo
us c
opy) Metro Mirror (synchronous)
For local High Availability
Global Copy (asynchronous copy utility)
For data migration, or coupled with FlashCopy for DR
IBM System Storage Copy Services Software *
FlashCopy and Space Efficient FlashCopy
Poin
t In
Tim
e Co
py
Global Mirror (asynchronous)
Distance for HA or DR
Consistency Group
* Describes current native attached DS6000 or DS8000 functions. Not all System Storage copy services are available in an IBM i Virtualized environmentIncremental FlashCopy with Global Copy (point in time)
For point in time snapshots
at DR site
Com
bos
© 2009 IBM Corporation
25Eric Hess, IBM 2008
Full System Copy Services + Global MirrorDS8000
Local Site
DS8000
Global Mirror
DR
Full System
FlashCopy
FlashCopyCG
Production
Backups
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 6.1o SMARTIOA fiber helps
reduce costs
Full System Copy Services - GMo DS6000 or DS8000 (non-VIOS)o Asynchronous replication between storage serverso Consistent replication of all data in System ASP (ASP1)o Not a good HA solution - relies on IPL (boot) to access
copyo Requires target system configuration changes before
copy can be usedo Full system replication results in Crash Consistent copy
Note, Full System Metro Mirroralso an option, but not shown
Remote Site
5.4, or 6.1, Toolkit
© 2009 IBM Corporation
26Eric Hess, IBM 2008
Full System Copy Services + GM (1-2)
o IPL required – abnormal IPL likely - power off source to avoido RTO: 30 minutes to hours o RPO: seconds - minutes based on consistency group design and
network (Metro Mirror RPO = 0)
o Native IBM i 5.4 & 6.1
o IBM i Hostedpartitions
o Windows Integrationo Does not support
VIOS
o DS6000 and DS8000o Clone copy of system and ASPs (data, OS, program products, temp work areas, etc)o Function provided by SAN subsystem softwareo Automation can optionally be provide by Lab Services ‘Copy Services Toolkit’ offering
Description:
o Local High Availability: No. RPO and RPO benefits when Journaling and SMAPP usedo Long distance Disaster Recovery: Yes o Both local HA and remote DR: No, however, can be combined with replication o Planned outages: No.o Online backups: Yes, with FlashCopy and additional LPARo Workload balancing: Some, via offline point in time snapshots copies
Business resiliency use:
Typical client environments:
o Medium SMB, and as for basic DR in Large Enterprise
Availability and recovery characteristics:
Environments
© 2009 IBM Corporation
27Eric Hess, IBM 2008
Full System Copy Services + GM (2-2)
o DS6000 or DS8000 costs over internal storageo Extra copies of disk required for backups and Global Mirroro DS6000 or DS8000 Copy Services software o Lab Services Copy Services toolkito WAN or LAN hardware for capacity and performance
o Can meet moderate DR requirementso No object out of sync issueso Incorporates into cross platform storage DR solutionso Application change management simplicity
Key advantages:
o Unable to address planned outages (changes on target cannot be propagated to source)o Replicates temp data so it uses the largest amount of network capacity of all solutionso Requires additional copies, plus external storage costs versus internal
Key considerations:
Typical planning and timelines:
o Server and DS Hardware planning and implementation as req.o WAN Network design (latency, bandwidth)o 3-12 months from planning to implementation
Typical costs considerations:
Vendors and Resources
o Storage team to own pre-sales for Disk Magic, S.E. FlashCopy, network planning, etc.
o Power team to lead architecture
o ATS and Techlineo Lab Services (fee)o Benchmark Center (fee)o GTS (fee)o IBM DS8000 Education
© 2009 IBM Corporation
28Eric Hess, IBM 2008
DS8000
DRand Test
IASP + Copy Services + Metro MirrorDS8000
Local Site
MetroMirror
Combination DS6000-DS8000 Copy Services cluster solution example
Production
*SYSBASIASP
FlashCopy
Backup
*SYSBAS
*SYSBASIASP
PowerHA or Copy Services Toolkit - MMo DS6000 or DS8000 (non-VIOS)o Synchronous replication between storage serverso Consistent replication of all data in System ASP (ASP1)o 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 IASPo 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 Toolkito IBM i 5.4 or i 6.1o SMARTIOA fiber helps
reduce costs
5.4, or 6.1, Toolkit, PowerHA
© 2009 IBM Corporation
29Eric Hess, IBM 2008
Production
*SYSBAS
HA
*SYSBAS
DS8000
LUN Group (active)
LUN Group (none)
Local Site
DS8000
IASP
Optional Golden
(D) Copy
Consistency Group
Global Mirror
DR Site
Production
*SYSBAS
IASP + Copy Services + Global Mirror + Combo
IASP
FlashCopy
Note: *SYSBAS disks are logical representations only, and may be disks located within the DS6000 or DS8000
PowerHA or Copy Services Toolkit Combinationo Global Mirror examples:
o DS6000 or DS8000 (non-VIOS)o Synchronous or asynchronous replication between storage serverso Advanced HA, DR and Backup solution
o Local Switched LUNs for HAo Local FlashCopy with 6.1 Quisce for nightly backupso Global Mirror for advanced DR across long distanceso Optional ‘D’ copy at remote site allows uninterrupted HA or DR test
o Many other combinations possible
5.4, or 6.1, Toolkit,
PowerHA
© 2009 IBM Corporation
30Eric Hess, IBM 2008
External Storage Copy Services Network Requirements
IASP based SAN copy solutions require less network bandwidth than full system SAN copy
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
5250 Interactive Application
SAP Application
www.systeminetwork.comBusiness Continuity with External Storage-Article ID: 20782
© 2009 IBM Corporation
32Eric Hess, IBM 2008
IASP + Copy Services + MM or GM (1 of 2)
o No IPL required - vary on (switch) IASP to an active server/LPAR o RTO: 5 minutes to hour depending on design and practiceo RPO: Real time, if journaling and SMAPP are used
o Native IBM i 5.4 & 6.1
o IBM i Hostedpartitions
o Windows Integrationo Does not support
VIOS
o DS6000 and DS8000o Storage level replication function provided by SAN subsystem softwareo IASP based for more granular replication o Automation provided by PowerHA or Toolkit
Description:
o Local High Availability: Yes, RTO and RPO benefits when Journaling and SMAPP usedo Long distance Disaster Recovery: Yes.o Both local HA and remote DR: Yes, using combinationso Planned outages: Yes.o Online backups: Yes, with FlashCopy or Save-While-Activeo Workload balancing: Some, via offline point in time snapshots copies
Business resiliency use:
Typical client environments:
o Medium SMB, Large Enterprise (usually too costly for small SMB)
Availability and recovery characteristics:
Environments
© 2009 IBM Corporation
33Eric Hess, IBM 2008
IASP + Copy Services + MM or GM (2 of 2)
o DS6000 or DS8000 costs over internal storageo Extra copies of disk required for backups and Global Mirroro PowerHA for i and/or Copy Services software o Lab Services Copy Services toolkito WAN or LAN hardware for capacity and performance
o Can meet advanced HA, DR and backup requirementso Fully integrated into IBM i via PowerHA or Toolkit – unique to IBM storage solutionso No object out of sync issues, robust switching and simple to operateo Incorporates into cross platform storage DR solutionso Application change management simplicityo Large number of installation and extensive IBM experience and skills
Key advantages:
o Costs – GM requires additional copies, plus external storage costs versus internal issueso DS6000 or DS8000 skills as requiredo Move to IASPs
Key considerations:
Typical planning and timelines:
o Application(s) and data migration proof of concept or testo Identify application and data objects to be replicatedo 6-18 months from planning to implementationo Storage I/O hardware planning and implementation as req.
Typical costs considerations:
Vendors and Resources
o Storage team to own pre-sales for Disk Magic, S.E. FlashCopy, network planning, etc.
o Power team to lead architecture
o ATS and Techlineo Lab Services (fee)o Benchmark Center (fee)o GTS (fee)o IASP, PowerHA and
Storage Education
© 2009 IBM Corporation
34Eric Hess, IBM 2008
Source Target
Logical Replication
Apply Process3rd party
software DB and Non-DB objects
ProductionData
Backup Copy
IBM i Remote Journaling
Management and Control
Typical Logical Replication Infrastructure
Logical Replication planning items:o Are skills are in place to plan,
implement, operate and maintaino Do not use ‘replicate everything’
design planning approacho 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 3rd copy if neededo Understand backup requirements
o A target copy backup with SWA by itself does not replace the need to quiesce source server applications or users
Tape Backup
Logical Replication Overview o IBM Remote Journaling is used for replication of DB and
other object typeso Vendor unique logic provides replication for other objects
types or other DB needso Vendor provides management and controlo Target copy is available for read-only workloado Higher tier products can support broadcast replication to 2 or
more copies
5.4 or 6.1
© 2009 IBM Corporation
35Eric Hess, IBM 2008
Solution Comparisons: Logical Replication (1-2)
o No IPL required. Wait for apply process on B/U to complete. o RTO: 15 minutes to small hours depending on design, practiceo RPO: near real time to minutes based on date type, activity,
distance
o All environments, including VIOS
o Add-on vendor software – does not require any optional OS featureso Journal (logging) based replication and management (journaling required)o Replication by objecto Automation provided by ISV. Use of IBM base cluster in complex designs suggested
Description:
o Local High Availability: Yes, with RPO benefits from synchronous Remote Journalingo Long distance Disaster Recovery: Yes, via journaling or asynch Remote Journalingo Both local HA and remote DR: Yes, multiple copies via cascade or broadcast optionso Planned outages: Most.o Online backups: Yes, replication may continue, while apply process on B/U is haltedo Workload balancing: Some, via concurrent access and proper planning and controls
Business resiliency use:
Typical client environments:
o Small SMB, medium SMB, and Large Enterprise
Availability and recovery characteristics:
Environments
© 2009 IBM Corporation
36Eric Hess, IBM 2008
Solution Comparisons: Logical Replication (2-2)
o Vendor software and optionso Operations resource to monitor dailyo Proper network o Education and services for proper design and implementationo HA Journal Performance Option 42 might be needed
IBM iClustero www.ibm.com/systems/
power/software/availability
Vision Solutionso www.visionsolutions.com
Maximum Availability noMAXo www.maxava.com
Trader’s Quick-Eddo www.quick-software-
line.com
o Storage agnostic – works with any supported internal, external or combinationo Only solution to offer concurrent access to data on target o Able to support simultaneous replication to local HA and remote DR copies o Smaller network bandwidth required than other solutions
Key advantages:
o Tends to require more monitoring, operations and development team resourceso Target RPO can fall behind during write intensive batch jobs or during backups on targeto Some applications can be problematic in keeping data synchronized
Key considerations:
Typical planning and timelines:o Journal and vendor product planningo Identify application and data objects to be replicatedo 3-12 months from planning and implementationo Must be fully tested on a regular basis (e.g. 3-6 months)
Typical costs considerations:
Vendors and Resources
© 2009 IBM Corporation
37Eric Hess, IBM 2008
Geographic Mirroring• IBM i storage
mgmt page level replication
• Synchronous• Any internal or
external storage
Cross Site Mirroring (XSM)“HA Switchable Resources” - option 41 – IBM i
Provides choices in design, implementation and management of IBM i 6.1 and SAN Storage IASP Cluster based replication technologies for HA and DR
* This new support and capability added to IBM i and XSM with PowerHA and 6.1, IBM SAN Only
PowerHA for i (5761-HAS)a.k.a HASM
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
IBM i 6.1 PowerHA
See www.redbooks.ibm.com: Implementing PowerHA for IBM I - SG24-7405-00 (Nov 2008)
© 2009 IBM Corporation
39Eric Hess, IBM 2008
Copy Services toolkit with IBM i 6.1 PowerHA for i
Functions PowerHA for i Toolkit ( stand alone environment )
IBM i operating system product
(PowerHA LPP )
Yes No
Requires PowerHA LPP N/A Yes- via tool kit release which supports PowerHa
Cluster switch/failover Yes Yes
Start/Stop FlashCopy Yes Yes
Health check provided Yes Yes
Resets multipath for disk registration on switchover
Yes Yes
Automates cluster node starting for switchover/FlashCopy
No Yes
Supports IBM i5.4 No Yes
Automate queise function No Yes
Provides DS scripts for replication Yes Yes
Full System or non IBM i replication management
No Yes
Provides CL programming interface for IBM storage
No Yes
Eric Hess, IBM 2008
© 2009 IBM Corporation
40Eric Hess, IBM 2008
IBM i Availability Technologies
Virtualized Environments
© 2009 IBM Corporation
41Eric Hess, IBM 2008
HA and DR Technologies for IBM i Virtual Environments
VIOS (hosting IBM i partition) - Power servers and IBM Power bladeso IBM and ISV Logical Replication o IBM i XSM Geographical Mirroring (PowerHA) with DS4000 or SVCo IBM Storage Copy Services (full copy, manual process only)
o DS4000 Point in time copy: FlashCopy or Volume Copy o DS4000 Continuous copy: Synchronous Enhanced Remote Mirroring (Metro Mirror)o SVC Copy Services (SAN Volume Controller)
Noteso PowerHA for i does not support copy services of DS4000 or SVCo Lab Services ‘Copy Services Toolkit’ does not support copy services of DS4000 or SVCo Full-system FlashCopy and VolumeCopy requires that the production IBM i logical partitiono (LPAR) be powered off or in a restricted stateo New 6.1 ‘Quiesce’ function not supported with DS4000 or SVC copy serviceso 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
© 2009 IBM Corporation
42Eric Hess, IBM 2008
Choosing a Solution
Summary
© 2009 IBM Corporation
43Eric Hess, IBM 2008
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 Up time requirements
o Recovery time objective
o Recovery point objective
o Resilience requirements
o Concurrent access requirements
o Geographic dispersion requirements
o Tolerance for end user disruption
o Outage type coverage
o Experience, skills and resources
o Cost and budget
o Service and support
Selection Criteria
i5/OS High Availability Clusters:Data Resilience Solutions
Document Version 1.0Version date: October 22, 2004Authors:Steven J FinnesRobert T GintowtMichael J Snyder© Copyright IBM Corporation 2004. All rights reserved.
i5/OS High Availability Clusters:Data Resilience Solutions
Document Version 1.0Version date: October 22, 2004Authors:Steven J FinnesRobert T GintowtMichael J Snyder© Copyright IBM Corporation 2004. All rights reserved.
See Redpaper redp0888: www.redbooks.ibm.com
© 2009 IBM Corporation
44Eric Hess, IBM 2008
Additional Events1. 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
* * * * * * * * This page for IBM and Business Partners Only * * * * * * * *
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
Techtalks: SmartZone for Power System Technical Training:oIBM: http://lt.be.ibm.com/smartzone/powertechoPartner: http://www.ibm.com/services/weblectures/smartzone/powertech
Look for email from “STG Sales Education & Events Newsletter” for Techtalk dates
© 2009 IBM Corporation
45Eric Hess, IBM 2008
Eric Hess, [email protected]
IBM 2009 Technical Sales Support Americas
Thank YouIBM i High Availability Strategies & Planning for 2012
Part 3 of 3
© 2009 IBM Corporation
46Eric Hess, IBM 2008
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