Using Mirroring and Log Shipping
by William R. Stanek
Microsoft® SQL Server™ 2005 Administrator's Pocket Consultant
- Microsoft® SQL Server™ 2005 Administrator’s Pocket Consultant
- Acknowledgments
- Introduction
- I. Microsoft SQL Server 2005 Administration Fundamentals
- 1. Microsoft SQL Server 2005 Administration Overview
- 2. Deploying Microsoft SQL Server 2005
- 3. Managing the Surface Security, Access, and Network Configuration
- Getting Started with the Configuration Tools
- Using SQL Server 2005 Surface Area Configuration
- Configuring SQL Server Services
- Managing the Network and SQL Native Client Configuration
- Configuring the Shared Memory Network Configuration
- Configuring the Named Pipes Network Configuration
- Configuring the TCP/IP Network Configuration
- Configuring the Native Client Protocol Order
- Configuring the Shared Memory Native Client Configuration
- Configuring the TCP/IP Native Client Configuration
- Configuring the Named Pipes Native Client Configuration
- 4. Configuring and Tuning Microsoft SQL Server
- II. Microsoft SQL Server 2005 Administration
- 5. Managing the Enterprise
- Managing SQL Server Startup
- Using SQL Server Management Studio
- Managing SQL Server Groups
- Managing Servers
- Registering a Connected Server
- Registering a New Server in Registered Servers View
- Registering Previously Registered SQL Server 2000 Servers
- Updating Registration for Local Servers
- Copying Server Groups and Registration Details from One Computer to Another
- Editing Registration Properties
- Connecting to a Server
- Disconnecting from a Server
- Moving a Server to a New Group
- Deleting a Server Registration
- Starting, Stopping, and Configuring SQL Server Agent
- Starting, Stopping, and Configuring the Microsoft Distributed Transaction Coordinator
- Starting, Stopping, and Configuring the Microsoft Search Service
- Working with Full-Text Search
- Managing Full-Text Catalogs
- Managing Server Activity
- 6. Configuring SQL Server with SQL Server Management Studio
- Managing the Configuration with SQL Server Management Studio
- Determining System and Server Information
- Configuring Authentication and Auditing
- Tuning Memory Usage
- Configuring Processors and Parallel Processing
- Configuring Threading, Priority, and Fibers
- Configuring User and Remote Connections
- Managing Server Settings
- Managing Database Settings
- Adding and Removing Active Directory Information
- Troubleshooting Configuration Problems
- 7. Core Database Administration
- Database Files and Logs
- Database Administration Basics
- Creating Databases
- Altering Databases and Their Options
- Setting Database Options in SQL Server Management Studio
- Modifying Databases Using ALTER DATABASE
- Configuring Automatic Options
- Controlling ANSI Compliance at the Database Level
- Configuring Cursor Options
- Controlling User Access and Database State
- Setting Online, Offline, or Emergency Mode
- Managing Cross-Database Chaining and External Access Options
- Configuring Recovery, Logging, and Disk I/O Error-Checking Options
- Viewing, Changing, and Overriding Database Options
- Managing Database and Log Size
- Manipulating Databases
- Tips and Techniques
- 8. Managing SQL Server 2005 Security
- 5. Managing the Enterprise
- III. Microsoft SQL Server 2005 Data Administration
- 9. Manipulating Schemas, Tables, Indexes, and Views
- Working with Schemas
- Getting Started with Tables
- Table Essentials
- Working with Tables
- Managing Table Values
- Using Views
- Creating and Managing Indexes
- Column Constraints and Rules
- 10. Importing, Exporting, and Transforming Data
- 11. Linked Servers and Distributed Transactions
- 12. Implementing Snapshot, Merge, and Transactional Replication
- 9. Manipulating Schemas, Tables, Indexes, and Views
- IV. Microsoft SQL Server 2005 Optimization and Maintenance
- 13. Profiling and Monitoring Microsoft SQL Server 2005
- 14. Backing Up and Recovering SQL Server 2005
- Creating a Backup and Recovery Plan
- Selecting Backup Devices and Media
- Using Backup Strategies
- Creating a Backup Device
- Performing Backups
- Restoring a Database
- Restoring the Master Database
- Mirroring Databases
- 15. Database Automation and Maintenance
- Overview of Database Automation and Maintenance
- Using Database Mail
- Using SQL Server Agent
- Managing Alerts
- Managing Operators
- Scheduling Jobs
- Automating Routine Server-to-Server Administration Tasks
- Multiserver Administration
- Database Maintenance
- Managing Log Shipping
- Log Shipping: How It Works
- Preparing for Log Shipping
- Upgrading SQL Server 2000 Log Shipping to SQL Server 2005 Log Shipping
- Enabling Log Shipping on the Primary Database
- Adding Log Shipping Secondaries
- Changing the Transaction Log Backup Interval
- Changing the Copy and Restore Intervals
- Failing Over to a Secondary Database
- Using Mirroring and Log Shipping
- William R. Stanek
- Index
Mirroring and log shipping are two different options that you can use to improve availability. The principal database used in database mirroring can act as the primary database in log shipping as well. You might want to do this is in a situation in which you have a critical database and you want to have multiple standby servers available. For example, you might use:
Mirroring to establish a single standby that will come online if the primary fails. With a fully synchronous mirroring configuration, automatic failover occurs if the principal database is lost, as long as the mirror server and witness can communicate with each other. Automatic failover causes the mirror server to assume the principal role and bring its database online as the principal database. When the former primary comes back online, it comes online as the mirror.
Log shipping to establish one or more standbys, which can be manually brought online in case the primary and mirror both fail. Transaction logs are shipped from a primary database to a central backup folder. Secondary servers access the backup folder and restore the transaction logs in their secondary databases to keep the servers synchronized. If the primary database fails, any secondary database can be brought online manually as the new primary database.
If you want to use both mirroring and log shipping, you will usually configure mirroring first, and then log shipping, by following these general steps:
Restore backups of the principal database with NORECOVERY onto the server that will act as the mirror.
Set up database mirroring by configuring the primary and mirror servers, and as necessary, the witness server (required for synchronous mirroring and automatic failover).
Restore backups of the principal database to servers that will act as log shipping secondary (destination) databases.
Create a shared resource to use as the backup folder for log shipping.
Configure the principal database as the log shipping primary for one or more secondary (destination) databases.
Configure the mirror server as a log shipping primary with the same log shipping configuration as the primary server. This allows log shipping to continue after database mirroring fails over.
If mirroring fails over, the former mirror server comes on line as the primary server. If the backup folder is not available to both the primary and mirror, log shipping backup jobs will fail when the mirror takes over as the primary. To prevent this, create the backup folder on a shared network resource.
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