barcode generator project source code in vb.net Performing Database Backups in Software

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Performing Database Backups
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Procedure Sp_addumpdevice
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Function Adds a dump device for use in backups.
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Syntax sp_addumpdevice [@devtype=] device_type , [@logicalname=] logical_name , [@physicalname=] physical_name [,{ [@cntrltype=] controller_type | [@devstatus=] device_status }] sp_configure [[@configname =] setting ] [,[@configvalue =] value ] sp_dboption [[@dbname =] database ] [, [@optname =] option ] [, [@optvalue =] value ] sp_dropdevice [@logicalname=] device [, [@delfile =] delfile ] sp_help [[@objname =] object ] sp_helpdb [[@dbname=] database ] sp_helpdevice [[@devname=] device ] sp_helpfile [[@filename =] file ] sp_helpfilegroup [[@filegroupname =] filegroup ]
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Sp_configure
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Sp_dboption
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Changes database options.
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Sp_dropdevice
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Sp_help
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Sp_helpdb Sp_helpdevice
Sp_helpfile
Sp_helpfilegroup
Table 6-5.
Stored Procedures for Backup Operations
Deletes an existing dump device.
Displays information about any database object. Displays information about a databases. Displays information about an existing dump device. Returns information about the files used by a database. Returns information about the filegroups used by a database.
AM FL Y
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SQL Server 7 Backup & Recovery
Procedure Sp_monitor
Function Displays performance and other statistics about SQL Server. Displays information about the disk space used by a database or table. Displays information about users who are connected to the server.
Syntax sp_monitor
Sp_spaceused
sp_spaceused [[@objname =] object ] [,[@updateusage =] {true | false}] sp_who [[@login_name =] username ]
Sp_who
Table 6-5.
Stored Procedures for Backup Operations (continued)
Figure 6-21.
Using sp_helpdb to view database information
6:
Performing Database Backups
However, if you wish to use the parameters out of order, you need to specify the parameters by name. Here is an example:
sp_addumpdevice @logicalname = 'dumpdev1', @devtype = 'disk', @physicalname = 'c:\mssql7\backup\dumpdev1.bak'
Details on using each of these stored procedures (including the format requirements for each of the parameters) are available in SQL Server Books Online.
AUTOMATING TASKS WITH SQL SERVER AGENT
Creating backup scripts is one task, but having to run them regularly is quite another. That s where SQL Server Agent comes in. SQL Server Agent can work behind the scenes like an invisible agent who never complains about having to run jobs, regardless of the time of day. In this section, we ll look at how you can use this service to run almost any task on a predefined schedule. Of course, manual intervention will still be required for some tasks, such as configuring databases and changing media. Let s start by looking at the configuration options for SQL Server Agent, and then move on to doing the real work with jobs, operators, and alerts.
Configuring SQL Server Agent
SQL Server Agent runs as a Windows NT/2000 service. It is designed to run on the system regardless of whether a user is logged in and is responsible for executing scheduled jobs. There are two main options for configuring security for SQL Server Agent. The first is to allow it to run under the local system account. This account has permissions to run jobs on the local machine only; it cannot access other machines on the network. In a single server environment, this option is the easiest to configure. If you want to be able to perform tasks on remote machines, however, you must assign SQL Server Agent a specific Windows NT user account under which it will log in. You can then assign the appropriate permissions to this account within the domain(s) in your environment. To set options for the SQL Server Agent service through Enterprise Manager: 1. Expand the server object for the SQL Server machine on which SQL Server Agent is running. 2. Expand the Management folder, right click the SQL Server Agent item, and select Properties. From the SQL Server Agent Properties dialog box, you can configure the various options for the service on the following tabs: s General In the General tab, you can specify the account that SQL Server Agent will use for running on the system:
SQL Server 7 Backup & Recovery
You can either enter a username and password for an existing Windows NT account or use the local system account. SQL Server Agent can also be configured to use a specific mail profile for sending e-mail notifications of jobs (described later in this section). If you have already configured a Messaging Application Programming Interface (MAPI) client for this user, you can enter this name in the box. Examples of MAPI clients include Microsoft Outlook and Outlook Express. To keep a record of all outgoing messages within the mailbox for this user, check the appropriate box. Finally, you can choose the name of the file to which SQL Server Agent will log error messages. You can also specify the name of a server operator who will receive a pop-up message when the error occurs. s Advanced On this tab, you can define the actions SQL Server Agent will take if it crashes:
6:
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