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All trademarks and registered trademarks are the property of their respective owners.© HelpSystems LLC. All rights reserve...
HelpSystems Corporate Overview. All rights reserved.
Ash Giddings
Product Manager
HelpSystems
Today’s Presenters
Glenn Rob...
HelpSystems Corporate Overview. All rights reserved.
• What is high availability?
• Current options
• Which method is best...
UP NEXT...
What is high availability?
HelpSystems Corporate Overview. All rights reserved.
What is high availability?
In information technology, high
availabili...
HelpSystems Corporate Overview. All rights reserved.
What is high availability?
UP NEXT...
Current options
HelpSystems Corporate Overview. All rights reserved.
HA/DR options for IBM i
• Logical replication
– Replication at the ob...
HelpSystems Corporate Overview. All rights reserved.
Logical replication
HelpSystems Corporate Overview. All rights reserved.
• Pros
– Target can be used for read-only access to replicated data
–...
HelpSystems Corporate Overview. All rights reserved.
PowerHA geographic mirroring
HelpSystems Corporate Overview. All rights reserved.
• Pros
– All data is copied from source to target as this is disk mir...
HelpSystems Corporate Overview. All rights reserved.
Metro Mirror
Global Mirror
Global Mirror
with Change Volumes
Storage-...
HelpSystems Corporate Overview. All rights reserved.
Disaster recovery testing without interruption
• Storage replication ...
HelpSystems Corporate Overview. All rights reserved.
• Pros
– All data is copied from source to target as this is disk mir...
HelpSystems Corporate Overview. All rights reserved.
Logical
replication
Geographic
mirroring
Storage-based
replication
So...
UP NEXT...
Which option is best for me?
HelpSystems Corporate Overview. All rights reserved.
• Assess each LPAR on a needs basis
• A combination of both logical a...
HelpSystems Corporate Overview. All rights reserved.
• Does my LPAR require 24/7 availability?
– Use logical replication
•...
HelpSystems Corporate Overview. All rights reserved.
• FlashCopy backups using storage software
• FlashCopy within VIOS sh...
HelpSystems Corporate Overview. All rights reserved.
• IBM i Advanced Copy Services
– http://tinyurl.com/o5t4k8b
– Full Sy...
UP NEXT...
About HelpSystems
HelpSystems Corporate Overview. All rights reserved.
Solutions portfolio
HelpSystems Corporate Overview. All rights reserved.
HelpSystems Corporate Overview. All rights reserved.
Template approach
UP NEXT...
Q&A and recap
HelpSystems Corporate Overview. All rights reserved.
• What is high availability?
• Current options
• Which method is best...
HelpSystems Corporate Overview. All rights reserved.
Contact Us
Website:
www.helpsystems.com/halcyon
Ash Giddings
Product ...
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High Availability Options for IBM i

How do you know which is high availability solution is best for your business? Get to know your options as IBM i experts Glenn Robinson and Ash Giddings provide their unbiased opinions backed by technical information.

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High Availability Options for IBM i

  1. 1. All trademarks and registered trademarks are the property of their respective owners.© HelpSystems LLC. All rights reserved. with Glenn Robinson and Ash Giddings High Availability Options for IBM i
  2. 2. HelpSystems Corporate Overview. All rights reserved. Ash Giddings Product Manager HelpSystems Today’s Presenters Glenn Robinson Power Systems Architect RSI Consulting
  3. 3. HelpSystems Corporate Overview. All rights reserved. • What is high availability? • Current options • Which method is best? • Additional resources • Q&A and recap Agenda
  4. 4. UP NEXT... What is high availability?
  5. 5. HelpSystems Corporate Overview. All rights reserved. What is high availability? In information technology, high availability refers to a system or component that is continuously operational for a desirably long length of time. Availability can be measured relative to "100% operational" or "never failing." 24/7
  6. 6. HelpSystems Corporate Overview. All rights reserved. What is high availability?
  7. 7. UP NEXT... Current options
  8. 8. HelpSystems Corporate Overview. All rights reserved. HA/DR options for IBM i • Logical replication – Replication at the object level provided by third-party software • PowerHA geographic mirroring – Replication by the IBM i operating system – Block-level replication of an independent ASP (IASP) to another IBM i LPAR – Internal or external storage – Requires PowerHA license • Storage replication – Replication by the storage system, e.g. V7000 – Block-level replication of an IASP or an entire system – External storage only
  9. 9. HelpSystems Corporate Overview. All rights reserved. Logical replication
  10. 10. HelpSystems Corporate Overview. All rights reserved. • Pros – Target can be used for read-only access to replicated data – Journaling is mandatory – Source and target LPAR are both active • Cons – Requires third-party software – Operating system overhead; depends on how much data is being replicated – Objects to be replicated need to be defined to the replication software – Estimates denote around 182 man-hours per year for monitoring • Comments – Popular customer choice – Data replicated over IP only Logical replication
  11. 11. HelpSystems Corporate Overview. All rights reserved. PowerHA geographic mirroring
  12. 12. HelpSystems Corporate Overview. All rights reserved. • Pros – All data is copied from source to target as this is disk mirroring – Choice of synchronous and asynchronous replication – Minimal amount of monitoring required • Cons – Requires PowerHA license on each LPAR – Only an IASP can be mirrored – Operating system overhead; depends on how much data is being replicated – The IASP can only be accessed by one LPAR at any one time – Fairly complicated PowerHA clustering configuration • Comments – Replication over IP only – Journaling not required but is recommended – Not widely implemented PowerHA geographic mirroring
  13. 13. HelpSystems Corporate Overview. All rights reserved. Metro Mirror Global Mirror Global Mirror with Change Volumes Storage-based mirroring
  14. 14. HelpSystems Corporate Overview. All rights reserved. Disaster recovery testing without interruption • Storage replication from site 1 to site 2 • Create a point-in-time FlashCopy of the volumes at site 2 • Run an LPAR over the J2 volumes and test DR • No interruption to storage replication at any point • Gone are the days of 4- to 5-day engagements with your DR hardware provider!!! Site 1 Site 2 J 2 H 1 H 2 Flash Copy Global Copy
  15. 15. HelpSystems Corporate Overview. All rights reserved. • Pros – All data is copied from source to target as this is disk mirroring – No overhead on the operating system; this is completely transparent to IBM i – Choice of synchronous and asynchronous replication – Full system and/or IASP replication can be configured – Simple configuration on storage – Minimal amount of monitoring required • Cons – The target LPAR cannot be active if full system replication is being used – Remote mirroring license required on most storage systems – Knowledge of storage subsystem required for initial configuration • Comments – Replication over IP or fibre – Becoming increasingly popular – Journaling not required but is recommended Storage-based mirroring
  16. 16. HelpSystems Corporate Overview. All rights reserved. Logical replication Geographic mirroring Storage-based replication Source and target active at all times Y Y* N Journaling mandatory Y N N Overhead on IBM i OS Y Y N All objects replicated N Y Y PowerHA required N Y N Target is a clone of the source N Y Y Target can be used for backups Y Y** Y*** Requires IASP N Y N *Only SYSBAS is active on both source and target ** Only if replication is stopped *** Requires use of FlashCopy snapshots Summary of options
  17. 17. UP NEXT... Which option is best for me?
  18. 18. HelpSystems Corporate Overview. All rights reserved. • Assess each LPAR on a needs basis • A combination of both logical and storage replication may be the best fit • There is no right or wrong answer Which option is best for me?
  19. 19. HelpSystems Corporate Overview. All rights reserved. • Does my LPAR require 24/7 availability? – Use logical replication • Do I require the source and target LPAR active at all times? – Use logical replication • Do I want to run my production LPAR backups on another LPAR? – You can use both logical replication and storage replication • Do I need simplified replication for my LPAR? – Use storage-based replication Questions to ask
  20. 20. HelpSystems Corporate Overview. All rights reserved. • FlashCopy backups using storage software • FlashCopy within VIOS shared storage pools • BRMS integration with FlashCopy • Clone LPARs in seconds • Share IASPs without a PowerHA license Other ideas to consider
  21. 21. HelpSystems Corporate Overview. All rights reserved. • IBM i Advanced Copy Services – http://tinyurl.com/o5t4k8b – Full System Replication for SVC and Storwize  Provides IBM i commands to configure and manage remote mirroring – Full System Copy Services Manger  IBM i commands to create a snapshot of an LPAR and back up to tape on another LPAR  Provides the capability to quiesce SYSBAS instead of having to power down the LPAR » No interruption to the users – BRMS integration  BRMS can be used to backup an LPAR clone but update the BRMS database on the source LPAR IBM Lab Services offerings
  22. 22. UP NEXT... About HelpSystems
  23. 23. HelpSystems Corporate Overview. All rights reserved. Solutions portfolio
  24. 24. HelpSystems Corporate Overview. All rights reserved.
  25. 25. HelpSystems Corporate Overview. All rights reserved. Template approach
  26. 26. UP NEXT... Q&A and recap
  27. 27. HelpSystems Corporate Overview. All rights reserved. • What is high availability? • Current options • Which method is best? • Additional resources Q&A and recap
  28. 28. HelpSystems Corporate Overview. All rights reserved. Contact Us Website: www.helpsystems.com/halcyon Ash Giddings Product Manager HelpSystems ash.giddings@helpsystems.com Glenn Robinson Power Systems Architect RSI Consulting glenn.robinson@rsipvm.com Telephone: 800-328-100 +44 (0) 1733 234995

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  • MiguelCantillana

    May. 9, 2018

How do you know which is high availability solution is best for your business? Get to know your options as IBM i experts Glenn Robinson and Ash Giddings provide their unbiased opinions backed by technical information.

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