Backup Database Using Files
Aug 10, 2004
I am but a lowly DBA unworthy of this task...
I have a large (200+ GB) database with many (100+) files. Please don't ask me why I did it this way; I inherited this database -- really, it wasn't my idea.
My predecessor also seemd to think that backups were unnecessary; there have been no backups of this database -- ever.
While we cast about for a good long term solution, I am trying various short-term options. One I want to explore is to back the database up in chunks -- ie, by backing up individual files. I created a test database with five files (there is only one filegroup on the production server). Here is the DDL:
-- =============================================
-- Create database on mulitple file groups
-- =============================================
IF EXISTS (SELECT *
FROM master..sysdatabases
WHERE name = N'MultiFile')
DROP DATABASE MultiFile
GO
CREATE DATABASE MultiFile
ON PRIMARY
( NAME = MultiFile,
FILENAME = N'e:MSSQLDataMultiFile.mdf',
SIZE = 1MB,
MAXSIZE = 10MB,
FILEGROWTH = 10%),
( NAME = MultiFile2,
FILENAME = N'e:MSSQLDataMultiFile2.ndf',
SIZE = 1MB,
MAXSIZE = 10MB,
FILEGROWTH = 10%),
( NAME = MultiFile3,
FILENAME = N'e:MSSQLDataMultiFile3.ndf',
SIZE = 1MB,
MAXSIZE = 10MB,
FILEGROWTH = 10%),
( NAME = MultiFile4,
FILENAME = N'e:MSSQLDataMultiFile4.ndf',
SIZE = 1MB,
MAXSIZE = 10MB,
FILEGROWTH = 10%),
( NAME = MultiFile5,
FILENAME = N'e:MSSQLDataMultiFile5.ndf',
SIZE = 1MB,
MAXSIZE = 10MB,
FILEGROWTH = 10%)
LOG ON
( NAME = MultiFile_Log,
FILENAME = N'e:MSSQLDataMultiFile_Log.ldf',
SIZE = 1MB,
MAXSIZE = 10MB,
FILEGROWTH = 10%)
GO
I have tried the following backup script:
BACKUP DATABASE MultiFile
FILE = 'MultiFile',
FILE = 'MultiFile2'
TO Backup01
WITH
INIT
BACKUP DATABASE MultiFile
FILE = 'MultiFile3',
FILE = 'MultiFile4'
TO Backup02
WITH
INIT
BACKUP DATABASE MultiFile
FILE = 'MultiFile5'
TO Backup03
WITH
INIT
And here is the restore script:
RESTORE DATABASE MultiFile2
FILE = 'MultiFile',
FILE = 'MultiFile2',
FILE = 'MultiFile3',
FILE = 'MultiFile4',
FILE = 'MultiFile5'
FROM Backup01, Backup02, Backup03
WITH MOVE 'MultiFile' TO 'E:MSSQLDataaMultfile.mdf',
MOVE 'MultiFile2' TO 'E:MSSQLDataaMultifile2.mdf',
MOVE 'MultiFile2' TO 'E:MSSQLDataaMultifile3.mdf',
MOVE 'MultiFile2' TO 'E:MSSQLDataaMultifile4.mdf',
MOVE 'MultiFile2' TO 'E:MSSQLDataaMultifile5.mdf',
MOVE 'MultiFile_log' TO 'E:MSSQLaMultFile_Log.ldf'
However, running the Restore script generates the following error:
Server: Msg 3259, Level 16, State 1, Line 1
The volume on device 'Backup02' is not part of a multiple family media set. BACKUP WITH FORMAT can be used to form a new media set.
Server: Msg 3013, Level 16, State 1, Line 1
RESTORE DATABASE is terminating abnormally.
I'm not sure what to make of this. What do I need to alter in either the backup script or the restore script to make this work?
I am trying this because my objectives are to:
1. Limit the amount of work that the server is performing during any one given backup session. The idea that I have is to backup the database in chunks using a rolling 3-5 day window.
2. The database must be up and operational 7x24x365 (except for one 4 hour window each month)
3. This is not the long-term solution; but I need something to tide us over until we can purchase additional storage capacity.
I appreciate any thoughts and or guidance you can provide.
Regards,
hmscott
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And also how to restore them back. (using c# programming)
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We have a pretty large SQL Server database, just shy of 400 GB. It is divided up into 24 different data files. The previous DBA here said it is faster to backup the backup individual data files to seperate files. So what he did was issue 6 backup statements like the one below as a step in an agent job.
BACKUP DATABASE MYDATABASE
FILE = 'Data',
FILE = 'data2',
FILE = 'data3',
FILE = 'data4'
TO Data1_4
WITH FORMAT
Next step:
BACKUP DATABASE MYDATABASE
FILE = 'data5',
FILE = 'data6',
FILE = 'data7',
FILE = 'data8'
TO Data5_8
WITH FORMAT
etc.. in sequence.
What I question is how this is faster than just issuing a backup for the whole database? Has anyone ever ran into this before?
- Eric
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Hello,
I am attempting to restore the database from within VB.NET application I am making the following 3 calls:
RESTORE FileListOnly FROM DISK = 'C:MyDatabase.dat'
USE Master RESTORE DATABASE MyDatabase FROM DISK = 'C:MyDatabase.dat' WITH NORECOVERY, MOVE 'MyDatabase' TO 'C:Program FilesMicrosoft SQL ServerMSSQLDataMyDatabase.mdf', MOVE 'MyDatabase_log' TO 'C:Program FilesMicrosoft SQL ServerMSSQLDataLDFMyDatabase.ldf', REPLACE
RESTORE DATABASE MyDatabase FROM DISK = 'C:MyDatabase.dat'
using SMO. This logic works fine with small *.dat files, however when using *.dat file of about 4Gb I get an error on the 3d restore database call:
ExecuteNonQuery failed for Database 'master'.
An exception occurred while executing a Transact-SQL statement or batch.
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Operator aborted backup or restore. See the error messages returned to the console for more details.
ExecuteNonQuery failed for Database 'master'.
An exception occurred while executing a Transact-SQL statement or batch.
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Operator aborted backup or restore. See the error messages returned to the console for more details.
The same program/logic also works fine when I use MS SQL 2005 and it runs fine from MS SQL 2005 Query Analyzer for both 2005 and 2000 databases. There seem to be only problem with MS SQL 2000 from within VB.NET. Anybody has any idea? I'd appreciate any response. Thanks
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emoteservershareDIFF" &&(
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-------------
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--------------
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