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Exchange 2013 Haute disponibilité et tolérance aux sinistres (Session 2/2 deuxième partie)
This document discusses high availability and site resilience features in Exchange Server 2013, including: - Dynamic quorum, which allows a cluster to maintain quorum and continue running even if multiple nodes fail sequentially by dynamically adjusting quorum vote assignments. - Guidance for performing maintenance on Exchange Server 2013 database availability group (DAG) members, which is different than Exchange 2010 due to architectural changes. - Resources like Microsoft blogs that provide additional information on Exchange and other Office products.
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Exchange 2013 Haute disponibilité et tolérance aux sinistres (Session 2/2 deuxième partie)
- 2. Exchange Server 2013 HighAvailability and Site Resilience (2/2) Scott Schnoll Senior Content Developer Microsoft Corporation scott.schnoll@microsoft.com http://aka.ms/Schnoll Twitter: @Schnoll Infrastructure, communication & collaboration
- 3. Agenda – Part1 • DAG Architecture • Witness Server #mstechdays Infrastructure, communication & collaboration
- 4. Agenda – Part2 • Dynamic Quorum • DAG member maintenance #mstechdays Infrastructure, communication & collaboration
- 5. DYNAMIC QUORUM #mstechdays Infrastructure, communication& collaboration
- 6. Dynamic Quorum • InWindows Server 2008 R2, quorum majority is fixed, based on the initial cluster configuration • In Windows Server 2012 (and later), cluster quorum majority is determined by the set of nodes that are active members of the cluster at a given time • This new feature is called Dynamic Quorum, and it is enabled for all clusters by default #mstechdays Infrastructure, communication & collaboration
- 7. Dynamic Quorum • Clusterdynamically manages vote assignment to nodes, based on the state of each node – When a node shuts down or crashes, the node loses its quorum vote – When a node rejoins the cluster, it regains its quorum vote • By adjusting the assignment of quorum votes, the cluster can dynamically increase or decrease the number of quorum votes required to keep running #mstechdays Infrastructure, communication & collaboration
- 8. Dynamic Quorum • Bydynamically adjusting the quorum majority requirement, a cluster can sustain sequential node shutdowns to a single node – This is referred to as a “Last Man Standing” scenario #mstechdays Infrastructure, communication & collaboration
- 9. Dynamic Quorum • Doesnot allow a cluster to sustain a simultaneous failure of majority of voting members – To continue running, the cluster must always maintain quorum after a node shutdown or failure • If you manually remove a node’s vote, the cluster does not dynamically add the vote back #mstechdays Infrastructure, communication & collaboration
- 10. Dynamic Quorum #mstechdays Infrastructure, communication& collaboration Majority of 7 required
- 11. Dynamic Quorum Majority of4 required 7 X X #mstechdays Infrastructure, communication & collaboration X
- 12. Dynamic Quorum Majority of3 required X X #mstechdays X Infrastructure, communication & collaboration X
- 13. Dynamic Quorum Majority of2 required X X X #mstechdays X Infrastructure, communication & collaboration X
- 14. Dynamic Quorum Majority of2 required X X X #mstechdays X Infrastructure, communication & collaboration X
- 15. Dynamic Quorum Majority of2 required X 0 1 #mstechdays X X X Infrastructure, communication & collaboration X
- 16. Dynamic Quorum Majority of2 required X 1 0 #mstechdays X X X Infrastructure, communication & collaboration X
- 17. Dynamic Quorum Majority of2 required X X 1 0 #mstechdays X X X Infrastructure, communication & collaboration X
- 18. Dynamic Quorum Majority of2 required X X X 0 #mstechdays 1 X X X Infrastructure, communication & collaboration X
- 19. Dynamic Quorum Use Get-ClusterNodeto verify DynamicWeight property 0 = does not have quorum vote 1 = has quorum vote Get-ClusterNode <Name> | ft name, *weight, state Name ---EX1 #mstechdays DynamicWeight NodeWeight State ------------- ---------- ----1 1 Up Infrastructure, communication & collaboration
- 20. Dynamic Quorum • Workswith most DAGs – Third-party replication DAGs not tested • • • • All internal testing has it enabled Office 365 servers use it Exchange is not dynamic quorum-aware Does not change quorum requirements #mstechdays Infrastructure, communication & collaboration
- 21. Dynamic Quorum • Clusterteam guidance: – Generally increases the availability of the cluster – Enabled by default, strongly recommended to leave enabled – Allows the cluster to continue running in failure scenarios that are not possible when this option is disabled • Exchange team guidance: – Leave it enabled for majority of DAG members – In some cases where a Windows 2008 R2 DAG would have lost quorum, a Windows 2012 DAG can maintain quorum – Don’t factor it into availability plans #mstechdays Infrastructure, communication & collaboration
- 22. DATABASE AVAILABILITY GROUP MEMBERMAINTENANCE #mstechdays Infrastructure, communication & collaboration
- 23. DAG Member Maintenance •Exchange 2010 guidance – – – – Run StartDagServerMaintenance.ps1 Perform the maintenance (e.g., install the SP or UR) Run StopDagServerMaintenance.ps1 Optionally rebalance the DAG by running RedistributeActiveDatabases.ps1 • Exchange 2013 guidance different due to architectural changes – http://aka.ms/DAG2013MM #mstechdays Infrastructure, communication & collaboration
- 24. DAG Member Maintenance Gointo maintenance mode Set-ServerComponentState <Server> -Component HubTransport -State Draining -Requester Maintenance Restart-Service MSExchangeTransport Set-ServerComponentState <Server> -Component UMCallRouter –State Draining –Requester Maintenance Redirect-Message -Server <Server> -Target <FQDNTarget> Suspend-ClusterNode <Server> Set-MailboxServer <Server> -DatabaseCopyActivationDisabledAndMoveNow $True Set-MailboxServer <Server> -DatabaseCopyAutoActivationPolicy Blocked Set-ServerComponentState <Server> -Component ServerWideOffline -State Inactive -Requester Maintenance Verify production mode Get-ServerComponentState <Server> | ft Component,State -Autosize Get-MailboxServer <Server> | ft DatabaseCopy* -Autosize Get-ClusterNode <Server> | fl Get-Queue #mstechdays Infrastructure, communication & collaboration
- 25. DAG Member Maintenance Gointo production Set-ServerComponentState <Server> -Component ServerWideOffline -State Active -Requester Maintenance Set-ServerComponentState <Server> -Component UMCallRouter –State Active –Requester Maintenance Resume-ClusterNode <Server> Set-MailboxServer <Server> -DatabaseCopyActivationDisabledAndMoveNow $False Set-MailboxServer <Server> -DatabaseCopyAutoActivationPolicy Unrestricted Set-ServerComponentState <Server> -Component HubTransport -State Active -Requester Maintenance Restart-Service MSExchangeTransport Verify production mode Get-ServerComponentState <Server> | ft Component,State -Autosize Get-MailboxServer <Server> | ft DatabaseCopy* -Autosize Get-ClusterNode <Server> | fl Get-Queue #mstechdays Infrastructure, communication & collaboration
- 26. Related Content • Exchange2013 Dimensionnement et Performance – 12/02/14 – 17:45-18:30, salle 252B #mstechdays Infrastructure, communication & collaboration
- 27. APPENDIX – RESOURCES #mstechdays Infrastructure,communication & collaboration
- 28. Office-related Blogs • • • • • • Office Blogs– http://blogs.office.com/ Exchange Team Blog – http://aka.ms/ehlo Lync Team Blog – http://aka.ms/lyncblog SharePoint Blog – http://aka.ms/spblog Yammer Blog – http://aka.ms/yammerblog Outlook Blog – http://aka.ms/outlookblog #mstechdays Infrastructure, communication & collaboration
- 29. Office-related Blogs • ExcelBlog – http://aka.ms/excelblog • Power Bi Blog – http://aka.ms/pbiblog • Office 365 for Business Blog – http://aka.ms/o365fbblog • Project Blog – http://aka.ms/msprojectblog • OneNote Blog – http://aka.ms/onenoteblog #mstechdays Infrastructure, communication & collaboration
- 30. Office-related Blogs • • • • • Access Blog– http://aka.ms/accessblog OneDrive Blog – http://blog.onedrive.com/ PowerPoint Blog – http://aka.ms/pptblog Word Blog – http://aka.ms/wordblog Office for Mac Blog – http://aka.ms/ofmblog #mstechdays Infrastructure, communication & collaboration
- 31. Promote with customers www.iammec.com Internalsite for all info aka.ms/MECfield Sign up for the newsletter <mecupdates> Join the conversation #iammec
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