the data store and sql server deployment strategies and troubleshooting
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The Data Store and SQL Server Deployment Strategies and Troubleshooting
Frank Marzullo
Senior Escalation Engineer, Critical Situation response team
May 8, 2012
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• XenApp Data Store deployments and challenges
• High Performance Vs. High Availability
• Tools and Troubleshooting Methodology
• SQL Replication and the identity crisis
• XenApp 6.5 Improved IMA performance
Agenda
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XenApp Data Store
Deployments and Challenges
Quick Access
&
Always Available
Where do I put my Data Store ?
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• IMA Ping – 20 byte per minute if no update data has been
received in the past 60 seconds.
• Read operations– happen via port 2512
• Write operations – happen via port 2513
• IMA Change notifications – also via port 2512
IMA Communication
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IMA Change Notification
Z D CZone 2
DataStore
MemberAny Zone
Z D CZone 1
2513
2512
2512
MembersZone 1
MembersZone 2
2512
2512
2512
2512
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What is IMA?
Data Store
1011011010 SSL 1011011010 SSL 1011011010 SSL 1011011101101110 111011011010 SSL 1011011010 SSL 1011011010 SSL 1011011101101110 11
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What is the Data Store ?
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Data Store
IMA access method
1011011010 SSL 1011011010 SSL 1011011010 SSL 1011011101101110 111011011010 SSL 1011011010 SSL 1011011010 SSL 1011011101101110 11ODBC
IMA
10110110101011011010
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Pre – XenApp 6.0 Post– XenApp 6.0
Stored Procedures
What is a Schema ?
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XenApp 5.0 & 4.5 XenApp 6.0 & 6.5
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• Persistent Store
• Farm Data Base hosted on SQL or Oracle
• Local Host Cache (LHC)
• Dynamic Store
• Volatile data stored in memory on Zone Data Collectors or Controllers only.
Farm Data Sets
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High Performance
Vs.
High Availability
• Cost ?
• Infrastructure Requirements ?
• Infrastructure Management ?
• Complexity Vs. Simplicity ?
Which do I choose ? Why can’t I have both ?
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SQL Options at a glance
Replication Mirroring
• High Performance over WAN.
• Transparent to IMA
• Recommended for -Geographically separated XenApp Farms.
• Special considerations for high latency WAN applications.
• Transparent to IMA
• Recommended for – Disaster Recovery scenarios.
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• XenApp 6 and 6.5 SQL Replication Important Considerations
• SQL Server 2005 Mirroring and Replication Caveats
• Data Store Replication with XenApp 5.0 using SQL 2008 with Windows Authentication
• Datastore Replication with XenApp 5.0 using SQL 2005 SP2 with Windows Authentication
• Database Mirroring Best Practices and Performance Considerations
• Using SQL Database Mirroring to Improve Citrix XenApp Server Farm Disaster Recovery Capabilities
Resources for SQL Replication & Mirroring
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Options at a glance
Physical Server Clusters Virtual Server Instances
• Very High TCO
• #1 HA solution for LAN’s
• Transparent to Application
• Lowest TCO with XenServer
• Dynamic Server Provisioning
• Fast recovery from Snap Shot
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• Virtualizing SQL Server 2008 with XenServer - Blog
• Virtualizing SQL Server 2008 with XenServer – White Paper
Resources for virtualizing SQL on XenServer
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Deprecated features in SQL 2012
Deprecated Features of Transactional Replication - The following transactional replication features were deprecated in SQL Server 2005 or SQL Server 2008.
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Tools and Troubleshooting Methodology
• Citrix Diagnostic Facility Trace (CDF)
Tools and Troubleshooting Methodology
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• SQL Server Profiler Trace
• Msg 548, Level 16, State 2, Line 134 The insert failed. It
conflicted with an identity range check constraint in database
'YourDB', replicated table 'dbo.yourTABLE', column 'nodeid'.
Tools and Troubleshooting Methodology
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SQL Replication and the
“Identity Crisis”
Unique Identifier
Track Changes
Added by SQL
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• What is the “Identity Crisis” ?
• Who does it affect ?
• How do I deal with it if it happens to me ?
SQL Replication and the identity crisis
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• CDF Trace - CTX111961
• SQL Profiler Templates for IMA issues
• SQL 2005 Template
• SQL 2008 Template
• Data Store Replication checker tools
• For XenApp 5.0 and earlier - CTX111656
• For XenApp 6 - CTX124815
• HOW TO: Troubleshoot Application Performance with SQL Server
• SQL Diag & SQL Diag configuration Tool
Resources
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#CitrixSummit
He who fails to plan
is planning to fail.- Winston Churchill (WW II)
31
• Advanced Concepts - XenApp Farm Maintenance
• Best practices for creating the Citrix Presentation Server data store on SQL 2005
• Best Practices for XenApp Administrators
Best Practice & Learning Resources
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• SQL Back ups – recovery models
• Working with tempdb in SQL Server 2005
• SQL Server Index Fragmentation and Its Resolution
Learning Resources
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XenApp 6.5 Improved IMA performance
XenApp 6.5 Improved IMA performance
• XenApp 6.5 introduces the Dynamic Data Center Provisioning
• In XenApp 6.5, servers can be configured in Session-host mode
• By Default XenApp servers are configured as Controllers
• Session-only XenApp servers run in a light-weight mode whose sole function is
to host XenApp sessions and nothing more.
• Speeding up Farm Deployments with XenApp 6.5 – Part 1
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XenApp 6.5 Improved IMA performanceThe table below shows the functionality of the Controller vs. Session-only roles.
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• XenApp 6.5 Enterprise Scalable XenApp Deployments
This Scalability Document created by our product engineering and test team
provides granular details regarding the test scenarios and results shared in
previous slide and new improvements seen during RTM testing of XenApp 6.5
One last resource
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Key session takeaways:
Citrix Confidential - Do Not Distribute
• XenApp Data Store deployments and challenges
• Tools and Troubleshooting Methodology
• XenApp 6.5 Improved IMA performance
#CitrixSummit
Tools as a Servicehttp://Taas.Citrix.com/Beta
Auto analysis health check
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40
Data Collection
Recommendations tailored to YOU
1
Quickly collect and upload your data
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Tools as a Servicehttp://Taas.Citrix.com/Beta
checkered racing shoes
Find out how to rev up environment maintenanceSee your Citrix pit crew in the expo hall with the
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