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SharePoint 2010 HA Options

...your options for ‘High Availability’ with SQL. SharePoint 2010 HA Options. About JT. I’m a SharePoint Admin. Working a contract with FaHCSIA I am a SharePoint Technical engineer with Extelligent Design With SharePoint since 2006. 10+ years in Infrastructure, DR, Networking

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SharePoint 2010 HA Options

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  1. ...your options for ‘High Availability’ with SQL SharePoint 2010 HA Options

  2. About JT.. • I’m a SharePoint Admin. Working a contract with FaHCSIA • I am a SharePoint Technical engineer with Extelligent Design • With SharePoint since 2006. • 10+ years in Infrastructure, DR, Networking • I blog about SharePoint (IT Pro stuff).www.jeremytaylor.net

  3. Take-away for today.. • Learn some DR concepts • Learn to set up SQL database mirroring • Know more about Log Shipping and SQL Clustering • Have something to take back to your manager / team leader

  4. What is HA? • A redundant system that provides a service when the primary system fails. • When this happens automatically, its called Failover What is DR? • Disaster Recovery – process, policies and procedures related to preparing and undergoing a recovery from a disaster

  5. Some DR concepts • RTO – Recovery time objective. The time you have to get the system up and running after a disaster. • RPO – Recovery point objective. The maximum amount of data loss that’s deemed acceptable in a disaster.

  6. Data Centres DR solutions… • Hot standby - A second data center that can provide availability within seconds or minutes. • Warm standby - A second data center that can provide availability within minutes or hours. • Cold standby - A second data center that can provide availability within hours or days.

  7. SharePoint DR ‘Pointers’ • Know your environment • Selecting the right tools for your environment • Know what to backup in SharePoint/SQL • Communicate with Management • Highlight the risks • Budget for your DR

  8. SharePoint DR -Key areas for Disaster Recovery • Physical architecture • Logical architecture • Configuration data • Business data

  9. Physical architecture • Storage: SAN, NAS • Networking and Comms equipment • Load balancers / Reverse Proxies • Physical servers – SharePoint & SQL • Essential AD and DNS services

  10. Logical Architecture • IIS Application pools • Web Applications • Zones and AAMs • Web application policies • Site Collections & security • Mysites • Third party tools

  11. Configuration Data • Service Application databases • Web.config files for SharePoint Web Applications • IIS configuration files (IIS metabase)

  12. Business Data • Content in SQL databases • BLOB storage • RBS provider

  13. But what about HA? • Multiple data centres.. • Load balancing.. • SAN replication.. • Virtual Storage.. • Stretched farm.. • Separate Standby farm.. • Mirroring.. • Log shipping.. • Clustering.. • All of the above? • It depends on your environment, budget, policies • There is no ‘One size fits all’ solution to this.. Recommended: http://technet.microsoft.com/en-us/library/ff628971.aspx

  14. Lets explore some more.. Stretched Farm Link between Data centres! Database ‘layer’ could be:Mirrored Clustered Source: http://technet.microsoft.com/en-us/library/cc748824.aspx

  15. Separate Standby Farm Link between Data centres! Database ‘layer’ could be:Async Mirrored Log Shipped

  16. HA Options with SQL • Database Mirroring • Log Shipping • SQL clustering

  17. SQL Mirroring • SQL ‘pushing’ instantaneous updates to its mirrored server. • Databases are duplicated and can be automatically failed over to the mirror. • Unlike MOSS 2007, SharePoint 2010 is ‘mirroring-aware’

  18. How to set up mirroring? • 2 servers • Principal • Mirror • 1 server for witness (optional) • Backup and restore in Full mode to mirror server with NO RECOVERY option. • Backup and restore Transaction logs to mirror server. • Go to the ‘Configure Database Mirroring Security’ wizard to create endpoints. • Choose your options • Start mirroring • Enable SharePoint databases to be ‘mirroring-aware’. • PowerShell for Service applications and Content databases. • Central Admin for Content databases.

  19. Some considerations • Latency less than 1 millisecond • Database recovery model: Full • Database permissions: same rights • Network bandwidth • More mirrored databases consume more threads= more logical processors

  20. What SharePoint Databases can be mirrored? • ConfigDb – Yes • Admin Db – Yes. • Usage Db – not recommended. Can be recreated. • Business Connectivity Service (BCS) – yes • Subscriptions setting db – yes • Search Admin – yes • Search Crawl – yes • Search Property – yes • User Profile Application (UPA) Profile – no, not supported • User Profile Application (UPA) Sync – no, not supported • User Profile Application (UPA) Social – no, not supported • Web Analytics (WAN ) Staging – not supported • Web Analytics (WAN ) Reporting – yes • Word Automation Service (WAS) – yes • State – no • Managed Metadata Services (MMS) – yes • Secure Store Service (SSS) – yes • PerformancePoint Service (PPS) – yes • Application Registry Service – not recommended

  21. What’s on Technet… The supported topologies include: • All content databases • Configuration database • Central Administration content database • Service application databases • Except for • the Web Analytics Staging database and • the User Profile Synchronization database. • Source: http://technet.microsoft.com/en-us/library/dd207314.aspx

  22. Configuring Failover.. New Web Applications.. Existing Content databases..

  23. Configuring Failover with PowerShell.. $db = get-spdatabase | where {$_.Name -eq "DEMOSP2010_Config"} $db.AddFailoverServiceInstance("MIRROR") $db.Update() Get-Help New-SP……ServiceApplication -full

  24. Demo: How to configure mirroring

  25. SQL Mirroring Pros • Automatic failover option • Independent • Highly configurable • Immediate replication • Responsive • Redundancy

  26. SQL Mirroring Cons • One mirror per database • No easy read-only option • Performance impact (push) • Dependence on latency • Geographical limitation • Inability to configure failover criteria

  27. Log Shipping • Utilises backup and restore jobs of SQL • It’s a ‘Pull’ approach. • Transaction logs are replicated as per your desired schedule • Primary, Secondary & Monitor (optional) • 4 SQL server agent jobs – • Backup on primary server • Copy on secondary server • Restore on secondary server • Alert on secondary/monitor server

  28. How to configure SQL Log Shipping • 2+1 Servers • File Share • Recovery Model – FULL or Bulk Logged • SQL Server Agent – must be started!

  29. How to configure Log Shipping:

  30. Log Shipping - Job scheduling

  31. Log Shipping - Monitor settings

  32. Log Shipping – Secondary server

  33. Secondary Db settings

  34. Secondary Db settings

  35. Set up monitor and grab your script..

  36. What SharePoint Databases can be logged shipped? • Configdb – no • Search – no • Service Applications – yes, except some • Content databases - yes Read more: http://technet.microsoft.com/en-us/library/ff628971.aspx

  37. Log Shipping Pros • Uses a pull strategy – little impact to performance • Independent jobs – not tied to SharePoint. • Cost effective HA solution when compared to using clustering in HA. • Read-only availability – no load on primary farm • Multiple destinations (pull approach) • Geographic redundancy – not like database mirroring or failover clustering • FILESTREAM compatibility – to a standby db

  38. Log Shipping Cons • No automatic failover • Latency • Monitoring – may need to use SCOM • Not a complete solution • Errors and data loss – are replicated.

  39. SQL Failover Clustering • Works on Windows Server 2008 clustering capabilities (Enterprise & Datacenter editions). • Minimum two servers for failover • Intended to be used as a HA solution but not completely fault tolerant. • Run the Cluster Validation Tool (CVT).

  40. SQL Clustering Pros • True automatic failover • No interruption for maintenance • Rapid failover • Scalable – up to 16 server nodes • Log shipping friendly

  41. SQL Clustering Cons • Network requirements • Storage requirements • High Costs • No Fault tolerance with shared storage

  42. Management needs to know… • SharePoint DR is an extensive topic! • HA requires planning and expertise • Capacity Planning must be done from project start and factor in HA options • Schedule (& budget) DR and HA tests every 6-12 months • Document and communicate the limitations of your DR Procedures • Consult Microsoft for licensing • Remind the Managemrnt of Murphy’s law..Anything that can go wrong, will go wrong! • Some JT advice: Be paranoid! Be prepared!

  43. Thank you! Questions? Happy to chat with you individually after the session… • Email: jeremy@jeremytaylor.net • Twitter.com/jeremytaylor

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