1. SQL Server Replication

2. Agenda Concepts Replication Types
Replicating to objects of different schema
Bi-Di
P2P
Merge
Merge Filtering
Monitoring
Performance Tips
Troubleshooting
Replication and Mirroring
Replication and Ags
Replication and Azure
Replication and Linux

3. COncepts Publisher/Distributor/Subscriber/Gateway Publication Article
Transactional Replication Replicates Transaction
COncepts

4. Move data closer to the consumer
Reduce contention
Move data closer to the consumer
Segregating data
Why Replicate

5. Replication Types Snapshot Snapshot with Immediate Updating
Snapshot with Queued Updating
Transactional
Transactional with Immediate Updating
Transactional with Queued Updating
BiDi
P2P
Oracle Publishing
Merge Replication

6. Demos Snapshot with immediate updating Transactional
Transactional to a different table on the same database
Transactional to objects of different schemas
BiDi
P2P
Initializing from a backup
Merge
Merge alternate snapshot folder
Merge Filtering

7. BiDi notes Loopback_detection Fix Identity (odd even)
Not For Replication
Schema Changes

8. Initialize From Backup
Requires Immediate Sync or does it?
How to handle new articles/Publications?
Initialize From Backup

9. P2p Getting Setup Internals Gotcha’s (EE/Dev only) Identity elements
Adding New Articles
To Quiesce or not to Quiesce
P2p

10. Monitoring Perfmon Query Replcounters Stats Tracer Tokens
Read Batch Size/Read Batch Threshold
Monitoring

11. Performance Tuning – deploying the snapshot
Initialize from backup
Database Snapshot (parameter of =‘database snapshot’
Index Builds are serial
Multiple Publications must be applied one at a time
No sync
Performance Tuning – deploying the snapshot

12. Performance Tuning – Distribution Agent
Wait stats
Balancing publications/Independent agent
Replicating the execution of stored procedures
MaxCmdsIntran
SubscriptionStreams (KB & )
Performance Tuning – Distribution Agent

13. Performance tuning ReadBatchSize/ReadBatchThreshold
CommitBatchSize/CommitBatchThreshold
Performance tuning

14. ReadBatchSize/ ReadBatchThreshold

15. ReadBatchSize (10000 singletons)

16. ReadBatchSize/ ReadBatchThreshold
Key take away
for heavily logged activiy make these values high.
For low logged activity (large batches/indexing) keep these low
ReadBatchSize/ ReadBatchThreshold

17. Profiles

18. 10000 Singletons

19. 100 Batches of 100 singletons

20. Performance Tuning – publication maintenance
Never use GUI, always script
Shut down SQL Server agent – or at least the log reader/distribution agents
Rolllback tran
Better to use a new publication than add an article
Purging the distribution database
Adding Indexes (not replicated)

21. Troubleshooting OutputverboseLevel Command line Profiler – exceptions
Extended Events
Troubleshooting

22. Replication and mirroring
Remote Distributor
Trace Flag 1448
Replication and mirroring

23. Replication and AGs Remote distributor sp_redirect_publisher
sp_validate_redirected_publisher
sp_get_redirected_publisher
sp_validate_replica_hosts_as_publishers

24. Replication and Linux SQL 2017 (CU 18) and above
Snapshot and Transactional supported
Linux can be a publisher/subscriber/distributor
Replication and Linux

25. Replication and Azure Transactional and Snapshot
Azure SQL DB & Azure VM, Azure SQL MI
Azure SQL MI as a publisher in public preview database/replication-with-sql-database- managed-instance
Limited subset of features
Use SQL authentication
Create an Alias