Instructor InputsSession 8..Session OverviewThis session includes the following topics: potx

This session includes the following topics: Backing up system databases Configuring log shipping Creating database snapshot Reverting a database from a snapshot Best practices

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Instructor Inputs S e

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This session includes the following topics:

Backing up system databases

Configuring log shipping

Creating database snapshot

Reverting a database from a snapshot

Best practices

Slide 1

Installing Windows XP Professional Using Attended Installation Querying, Managing, and Administering Databases Using SQL Server 2005

Objectives

In this session, you will learn about:

Recovery model Backing up system databases Monitoring performance by using dynamic management views Configuring log shipping

Creating database snapshot Reverting a database from a snapshot Best practices that can be considered while restoring databases in SQL Server 2005

Tips and tricks that will help you effectively restore databases and use performance monitoring tools in SQL Server 2005 FAQs related to restore and log shipping concepts of SQL Server 2005

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Slide 2 of 20

Ver 1.0 Collaborate Session 8

Knowledge Byte

The recovery model determines the backup and restore strategies that can be used for a database.

There are three recovery models available in the SQL Server:

Simple recovery model Full recovery model Bulk-logged recovery model

In addition to user databases, you can back up the msdb, master, and model system databases A backup of these databases allows you to restore and recover the SQL Server system in the event of a system failure, such as a hard disk failure.

Slide 3

Knowledge Byte (Contd.)

You can create only a full database backup of the master database You should back up the master database when you execute any of the following:

CREATE DATABASE, ALTER DATABASE or DROP DATABASE statements

sp_addserver,sp_dropserver,sp_addlinkedserver, and sp_addmessage system stored procedures

The SQL Server provides database administrators with DMVs, which return server state information

The DMVs are a group of views and table-valued functions

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Slide 4 of 20

Some DMVs are applied on the server as a whole and are stored in the master databases.

To view these DMVs, the user must have the VIEW SERVER STATE permission.

The remaining DMVs are specific to a particular database and to view them the user must have the VIEW DATABASE STATE permission.

In SQL Server 2005, DMVs have been organized in 12 categories

Microsoft Office

Slide 5

Log shipping:

Can be used to maintain high availability in situations when it

is essential to provide a reliable stand by server and a fast failover.

To implement log shipping, you need to perform the following tasks:

Create a file share.

Configure log shipping on the primary server.

Specify the secondary server.

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Slide 6 of 20

Database Snapshot:

Can be created by using the AS SNAPSHOT OF clause with the CREATE DATABASE statement.

Syntax:

CREATE DATABASE database_snapshot_name

ON ( NAME = logical_file_name, FILENAME = 'os_file_name' ) [ , n ]

AS SNAPSHOT OF source_database_name[;]

Slide 7

Database Snapshot considerations:

You can create a database snapshot on the same server instance as the source database.

You can create multiple snapshots of a database.

You cannot drop, detach, or restore primary database

You cannot drop files from a database snapshot.

You cannot back up or restore database snapshots.

You cannot attach or detach database snapshots.

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Slide 8 of 20

Reverting a database from a Snapshot:

Use the FROM DATABASE_SNAPSHOT clause with the RESTORE statement.

Syntax:

RESTORE DATABASE database_name FROM DATABASE_SNAPSHOT = snapshot_name

Slide 9

Best Practices

Avoid restoring databases from unknown sources Drop databases that no longer exist

Shutdown application before using RESTORE

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Slide 10 of 20

Tips and Tricks

Backup master database when master has been restored and any changes have been reapplied.

Use the Task Manager and Network Monitor Agent tools of Windows operating system to monitor the performance of the database server.

Save trace results to a file.

If you want the witness server to remain disconnected for a significant amount of time, you should remove the witness server from the session until it becomes available.

If you require only a single destination database, database mirroring is the recommended solution If you require more than one destination database, you need to use log shipping, either alone or with database mirroring

Slide 11

Can you backup and restore individual tables in SQL Server 2005?

No, you cannot backup and restore individual tables in SQL Server 2005.

FAQs

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Slide 12 of 20

If you execute DBCC CHECKDB statement, which other two statements are automatically executed?

If you execute DBCC CHECKDB statement, the DBCC CHECKTABLE and DBCC CHECKALLOC statements are automatically executed.

FAQs (Contd.)

Slide 13

Can you create a mirror of system databases?

No, you cannot create a mirror of system database.

FAQs (Contd.)

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Slide 14 of 20

Log shipping can be used with which all components of SQL Server?

Log shipping can be used with database mirroring, replication, and notification services.

FAQs (Contd.)

Slide 15

Which user role can configure log shipping on an instance

of a server?

The sysadmin user role can configure log shipping on an instance of a server.

FAQs (Contd.)

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Slide 16 of 20

Challenge

Which recovery model is used when the data is critical and data cannot be lost?

Simple recovery model Full recovery model Bulk-logged recovery model Bulk recovery model

Answer:

Full recovery model

Slide 17

Challenge (Contd.)

Which of the following operations is not fully recoverable in bulk-logged recovery model?

CREATE INDEX SELECT INTO WRITETEXT CREATE TABLE

Answer:

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Slide 18 of 20

Which type of database backup you can perform on master database?

Differential backup Full backup Transaction log backup Tail-log backup

Answer:

Full backup

Slide 19

Which DMV is used to view the authenticated SQL Server sessions?

sys.dm_exec_connections sys.dm_exec_requests sys.dm_exec_query_stats sys.dm_exec_sessions

Answer:

sys.dm_exec_sessions

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Slide 20 of 20

The sys.dm_io_backup_tapes and sys.dm_io_pending_io_requests DMVs belong to which category of DMV?

I/O –related DMVs Database –related DMVs Replication –related DMVs Execution –related DMVs

Answer:

I/O –related DMVs

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1 b Full recovery model

3 b Full backup

5 a I/O –related DMVs

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1 How will you check the performance of a server due to a problem with the operating

system?

b By using System Monitor tool

c By using Database Tuning Advisor

d By using SQL Server Profiler

2 Which of the following is not the SQL Server log?

a SQL Server agent log

b SQL Server database engine log

c Transaction log

d Database mail log

3 Which utility is provided by the SQL Server to view all types of event logs?

a Log Viewer utility

b Log File Viewer utility

c SQL Server Agent utility

d Log System utility

4 Which technique in the SQL Server allows you to keep a copy of the database on a

standby server? In this case, the standby server takes over the control from the

primary server if the later is unavailable

a Database Restore

b Database Security

d Database Mirroring

5 Which instance of the database server in database mirroring holds the active

database?

a Witness Server

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b Database snapshots

c Database mirroring

d Database restore

8 Which of the following cannot be a workload?

a Trace table

b File consisting of T-SQL statements

c Trace file

d File consisting of transaction log

9 Identify the correct statement to restore a full database backup with option to

continue restoring more backups?

NORECOVERY

10 Which of the following is the correct syntax for restoring a log file?

a RESTORE < database_name> FROM <transactionlog_backup_filename>

b RESTORE LOG < database_name> FROM <transactionlog_backup_filename>

<transactionlog_backup_filename>

d RESTORE LOG <transactionlog_backup_filename> FROM < database_name> FROM

Solutions

1 By using System Monitor tool

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Monitoring the performance of a server is one of the important activities performed by an

administrator The performance of a database server is measured by the time and

resources consumed in responding to the queries posted by the users The performance of

the database server should be regularly monitored An administrator should implement

appropriate solutions to optimize the performance of the database server

Discuss the various tools provided by the SQL Server to monitor and optimize its

performance

Instructor Inputs

You can conduct the discussion as follows:

Discuss the various tools provided by the SQL Server to monitor and optimize its

performance

Discuss the System Monitor tool provided by the Windows operating system

Solution

SQL Server provides various tools such as SQL Server Profiler, Log File Viewer,

Dynamic Management Views (DMVs), and Database Tuning Advisor to monitor and

optimize performance In addition, you can also monitor the performance using the

System Monitor tool provided by the Windows operating system

Monitoring performance by using SQL Server Profiler

While monitoring performance, an administrator needs to check for the events occurring

on the server These events include the execution of T-SQL statements or a change in the

database properties

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the server at any given point of time The SQL Server provides database administrators with DMVs, which return server state information The DMVs are used as a tool to identify the activities of the SQL Server

Monitoring and optimizing performance by using Database Engine Tuning Advisor Database tuning is one of the most important tasks that a database administrator performs Database tuning involves a set of activities used to optimize the performance of a

database The goal of database tuning is to maximize the use of system resources

Monitoring performance by using System Monitor

Sometimes you can possible face degrade in the performance of the server, which could

be due to some problems with the operating system or other computer resources For example, the size of the paging file or the virtual memory has increased drastically causing the server to run slow

To monitor such problems, you can use the System Monitor tool This tool allows you to monitor the performance of the computer and its resources, such as memory or processor using counters A counter specifies the criteria for monitoring an event

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