Messaging plays a crucial role in the day to day operations of most businesses. Millions of emails are sent around the world every second containing customer orders, confidential data and information critical to its recipients. But what happens when your email system goes down? Waterstons’ messaging specialists, Andrew Quinn and Nigel Robson, discuss the importance of a bulletproof messaging service to support your organisation’s communications. How do we protect ourselves against different types of failures, and how can we continue to provide effective services in a worst case scenario?
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1. Messaging: Zero Downtime Communications Andrew Quinn &
Nigel Robson 11/10/2013
2. Email and your Business Primary method of business
communications Stores critical business data Outages can result in
financial loss Often dont realise importance until its gone 3. Some
Definitions High Availability (HA) Preventing a service outage in
the event of a hardware or software failure Disaster Recovery (DR)
Restoring services following a major outage Site Resilience Quickly
recovering from the loss of a site (can be HA or DR) Service
Continuity Providing basic services during an outage 4. High
Availability Service ContinuityDisaster Recovery Site Resilience!
5. High Availability Eliminate single points of failure Automatic
recovery in the event of a failure Little or no loss of service 6.
Single Points of Failure 7. High Availability Options Clustering
Replication Network Load Balancing DNS Round Robin 8. Disaster
Recovery Outage has occurred Restore services as quickly as
possible Human intervention required 9. Disaster Recovery Options
Backups Traditional / Virtual Machine Tape / Disk Replication
Application level Storage level Virtual Machine level 10. Disaster
Recovery Metrics Recovery Point Objective How much data loss will
be incurred in the worst case? Recovery Time Objective How long
will it take to recover services in the worst case? 11. Disaster
Recovery Considerations Data consistency Application consistency
Crash consistency Additional recovery steps Rehearsals Make sure it
works! Access How will people access the recovered services? 12.
Evolution of Exchange Recoverability: 2003 Multiple servers using
shared storage Automatic recovery from server failure No protection
against storage failure No offsite recovery 13. Evolution of
Exchange Recoverability: 2007 More servers required No shared
storage Automatic recovery from server or storage failure Offsite
replication to a standby server Offsite recovery takes quite a bit
of manual work 14. Evolution of Exchange Recoverability: 2010 Less
servers required (if using load balancers) Automatic recovery from
server or storage failure Offsite replication to a live server
Offsite recovery time significantly reduced 15. Evolution of
Exchange Recoverability: 2013 Load balancers optional Automatic
recovery from server or storage failure Offsite replication to a
live server High availability across sites 16. Evolution of
Exchange Recoverability: Summary VersionProtection from Server
FailureProtection Offsite from Storage Disaster Failure
RecoveryCross-Site High
Availability2003YesNoNoNo2007YesOptionalSlowNo2010YesYesQuickerNo2013YesYesQuickerYes
17. Modern Site Resilience Datacentre 1Witness SiteDatacentre
2Exchange 2013 ServerFile Share WitnessExchange 2013 ServerOffice
Workers, Home Workers, Remote Workers 18. Service Continuity
Maintain incoming / outgoing messaging service in the event of a
complete messaging infrastructure failure Typically implemented
using a hosted partner Often an add-on to hosted messaging hygiene
solutions 19. Service Continuity Continuity Provider
InternetContinuity MailboxMessage QueueWebmailOutlookMail Server
20. Summary Email has become critical to business operations Highly
resilient services have become affordable to SMEs You can mix and
match options to provide a level of resilience to suit your needs
and budget 21. Q&A Coming up Messaging: Protecting your Data
and your Reputation 1st November 2013 Messaging: Harnessing the
Cloud 15th November 2013
