SQL Server Reporting Services Disaster Recovery Webinar
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This is the PASS DW/BI Webinar for SQL Server Reporting Services (SSRS) Disaster Recovery webinar. You can find the video at: http://www.youtube.com/watch?v=gfT9ETyLRlA
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SQL Server Reporting Services Disaster Recovery Webinar
- 1. SSRS Disaster Recovery PASS DW|BI Webinar Ayad Shammout (@aashammout) and Denny Lee (@dennylee) Hosted by Julie Koesmarno (@mssqlgirl)
- 2. Agenda • Review of Scale Out Architectures • It’s all about the Catalog • SSRS Disaster Recovery Infrastructure • Optimizing the Catalog with SQL Server 2012 Always On
- 3. Reporting Services Architecture Typical One-Box Deployment Report Server NLB Clients RSDB Flat Files, OLE DB, ODBC SQL, AS, DB2, Oracle, Teradata, etc. Clients Data Sources (to report against) RS Server Report Catalog Clients
- 4. Reporting Services Architecture Remote Report Catalog = Higher Availability Report Server NLB Clients RSDB Flat Files, OLE DB, ODBC SQL, AS, DB2, Oracle, Teradata, etc. Clients Data Sources (to report against) RS Server Report Catalog Clients
- 5. Reporting Services Architecture Scale Out and High Availability Infrastructure Clients Clients RS Server RSDB Flat Files, OLE DB, ODBC SQL, AS, DB2, Oracle, Teradata, etc. RS Server Data Sources (to report against) NLB RS Server Report Catalog Clients Reporting Scale Out Deployment Report Server Cluster
- 6. Report Catalog Architecture Report Catalog RSDB Report Server Catalog (RSDB) Stores all report metadata including report definitions, report / history snapshots, scheduling, etc. Report Server TempDB Stores temporary snapshots while running reports These databases can be a bottleneck Optimize by applying standard SQL DB techniques Catalog has a lot of I/O and transactions – RS2005: Many inserts to ChunkData, SnapshotData, and SessionData tables – RS2008: Many inserts Segment; takes majority of transactions of
- 7. Report Catalog Best Practices > Use a dedicated server • Same server as SSRS Server • Great for small environments • In enterprise environments, too much resource contention • Same server as data source database • SQL resource contention (TempDB, plan cache, memory buffer pool) between data source and RS catalogs • As load increases need to monitor CPU, I/O, network resources, and buffer pool • Reduce resource contention by having a dedicated RS catalog server you can tune. • Apply high availability and disaster recovery procedures (e.g. clustering, mirroring, log shipping) to protect the RSDB
- 8. Report Catalog Best Practices > High Performance Disk • Check out Predeployment I/O Best Practices • Have more smaller size disks with faster rotation speeds (e.g. 15K RPM) vs. fewer larger disks with slower rotations • Maximize/balance I/O across ALL available spindles • Separate disks between RSDB and RSTempDB • RSDB a lot of small transactions (report metadata) • RSTempDB has more (not as many) larger transactions • Pre-grow your databases • Stripe dB files to number of cores (0.25 – 1.0) • Minimize allocation contention • Easier to rebalance database when new LUNs are available • Use RAID 10, not RAID 5
- 9. Report Catalog Best Practices > Operations Best Practices • Data in RSTempDB is highly volatile • Report lifetime policy of data = SessionTimeout value (10min) • CleanupCycleMinutes guides background cleanup thread • Once session timeout reached, cleanup temporary snapshot from tempDB • This is done every CleanupCycleMinutes • Data is RSDB is long lived; should be backed up • Backing Up and Restore Databases in SQL Server • Optimizing Backup and Restore Performance in SQL Server • Backing Up and Restore Encryption Keys • Maintain your RS catalogs • Remember, these are SQL databses • E.g. Re-indexing catalog tables or updating stats may improve query performance
- 10. Report Catalog Best Practices > Report Catalog Sizing • RSDB database size • Varies by number of reports published and number of history snapshots • General rule of thumb: • Moderate size report definition takes 100-200KB of disk space • This is larger than the actual RDL as SSRS persists both RDL and compiled binary • Assume 5:1 compression ratio (e.g. 10MB of data, snapshot is 2MB in size) • RSTempDB database size • Varies by number of users whom are concurrently using the Report Servers • Each live report execution generates report snapshot persisted in the RSTempDB • General rule of thumb: • 10-20% concurrency of user base, e.g. 1000 users, then max 200 concurrent users. • If most users are accessing 10MB reports, then you will need 400MB of storage • 200 users x 10MB reports / 5:1 compression ratio= 400MB
- 11. Scale Out ≠ Disaster Recovery
- 12. Disaster Recovery Environment Primary Data Center - SSRS servers - Separate Report Catalog Content Content Switch - With own Failover Switch cluster Overall Infrastructure Primary Data Center SSRS SSRS SSRS Failover Cluster Disaster Recovery Site - Closely duplicates primary - Separate Geographic location - Non-critical can utilize fewer resources - But Mission Critical ssytems shoul dhave 1:1 duplication RSDB Montréalsql4 RSDB Bostonsql4 RSDB SSRS SSRS
- 13. Disaster Recovery Environment Network Configuration Primary Data Center SSRS SSRS SSRS Network Config - Ensure network connectivity for clients - Use content switch to load balance and redirect traffic - Direct fiber between PDC and DR to minimize latencies RSDB Montréalsql4 Failover Cluster SSRS SSRS Bostonsql4 RSDB RSDB Content Switch Content Switch
- 14. Disaster Recovery Environment Database Configuration Primary Data Center SSRS SSRS SSRS Database Config - Bostonsql4 is primary RSDB instance w/ active/passive cluster in PDC - Content switch points to sql4 alias - Mirrored Montréalsql4 on DR site RSDB Montréalsql4 Failover Cluster SSRS SSRS Bostonsql4 RSDB RSDB Content Switch Content Switch
- 15. Disaster Recovery Environment Database Configuration: Active / Active vs. Active / Passive Primary Data Center SSRS SSRS SSRS Advantages of Active/Passive Failover Cluster SSRS - Allows other Active database instances SSRS to be located on Passive node - Works well if passive node is not overutilized RSDB Montréalsql4 Failover Cluster Bostonsql4 RSDB RSDB Content Switch Content Switch Not good if passive node has a lot of traffic, concurrent users, etc. Then should go with Active/Active cluster
- 16. Disaster Recovery Environment Database Configuration: Asynchronous Mirroring Async Mirroring Content Switch All RS Operations must connect Content Switch to RSDB for its metadata Primary Data Center Async Mirroring has minimal to no impact on response time performance SSRS SSRS SSRS SSRS SSRS OK to be async as report metadata is not frequently updated Failover Cluster RSDB Montréalsql4 RSDB Bostonsql4 RSDB
- 17. Disaster Recovery Environment Database Configuration > Initializing Database Mirror A relatively easy way to initialize a database mirroring setup is to: 1. Make full and transaction log backups of the Reporting Services databases on the principal server. 2. Copy the backups over to the disaster recovery site, restoring each Reporting Services database in no-recovery mode. 3. Set up the failover partner on the mirror (that is, the DR site) before you set up the failover partner on the principal server.
- 18. Failover Scenarios • Primary Data Center Reporting Servers go offline • Primary Data Center RSDB Active server goes offline • Primary Data Center RSDB cluster goes offline • Primary Data Center Outage
- 19. Failover Scenario Automatic Failover Primary Data Center Reporting Servers go offline Primary Data Center SSRS SSRS SSRS RSDB Montréalsql4 Failover Cluster SSRS SSRS Bostonsql4 RSDB RSDB Content Switch Content Switch
- 20. Failover Scenario Primary Data Center RSDB Active server goes offline Primary Data Center SSRS SSRS SSRS RSDB Automatic Failover Montréalsql4 Failover Cluster SSRS SSRS Bostonsql4 RSDB RSDB Content Switch Content Switch
- 21. Failover Scenario Primary Data Center RSDB Active server goes offline Primary Data Center SSRS SSRS Content Switch Content Switch SSRS RSDB RSDB Manual Failover Failover Cluster Montréalsql4 Bostonsql4 RSDB SSRS SSRS
- 22. Failover Scenario Primary Data Center Outage Primary Data Center SSRS SSRS SSRS Content Switch suspends primary IP addresses and activates DR site IP address so all connections are redirected to DR site RSDB Montréalsql4 Failover Cluster SSRS SSRS Bostonsql4 RSDB RSDB Content Switch Content Switch
- 23. Failover Scenario Primary Data Center Outage: Planned Outage Primary Data Center SSRS SSRS SSRS Manually execute script to manually switch to partner database. RSDB Montréalsql4 Failover Cluster SSRS SSRS Bostonsql4 RSDB RSDB Content Switch Content Switch
- 24. Failover Scenario Primary Data Center Outage: Unplanned Outage Primary Data Center SSRS SSRS SSRS Manually failover script to force service to switch with possible data loss RSDB Montréalsql4 Failover Cluster SSRS SSRS Bostonsql4 RSDB RSDB Content Switch Content Switch
- 25. Disaster Recovery Environment Database Configuration: Always On Primary Data Center SSRS SSRS Content Switch Content Switch SSRS SSRS AG Listener VNN SSRS - Always On Availability Group RSDB Secondary Replica Primary Replica RSDB SSRS
- 26. Q&A Hope you enjoyed the session!
Editor's Notes
- To ensure connectivity from the clients to the primary data center and the disaster recovery site, a common technique is to use a content switch to load-balance traffic within the individual sites as well as between the global sites. In the case of CareGroup Healthcare, a Cisco GSS is used as the content switch. As well, there is direct fiber network connectivity between the primary data center and the disaster recovery site to ensure minimal latencies for any communication between the two centers. If the primary site goes down for any reason, the content switch transparently redirects all client traffic to the disaster recovery set of Reporting Services servers. If the content switch is unavailable, the IP address can be changed at the DNS level. This latter change is a manual switch with a slightly longer network outage, which is due to the DNS cache clearing the old IP address and pointing to the new one.
- Initializing Database MirrorA relatively easy way to initialize a database mirroring setup is to:1) Make full and transaction log backups of the Reporting Services databases on the principal server.2) Copy the backups over to the disaster recovery site, restoring each Reporting Services database in no-recovery mode.3) Set up the failover partner on the mirror (that is, the DR site) before you set up the failover partner on the principal server.
- Initializing Database MirrorA relatively easy way to initialize a database mirroring setup is to:1) Make full and transaction log backups of the Reporting Services databases on the principal server.2) Copy the backups over to the disaster recovery site, restoring each Reporting Services database in no-recovery mode.3) Set up the failover partner on the mirror (that is, the DR site) before you set up the failover partner on the principal server.