common backup problems - steve jones
DESCRIPTION
Presentation from Steve Jones at SQL In The City US Tour 2013.TRANSCRIPT
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What’s more important?
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Both are important
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01011001
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Full Backup
Sales Database (sales.mdf)
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Full Backup
Data
Sales Database (sales.mdf)
Free Space
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Full Backup
MyBackup.bak
Sales Database (sales.mdf)
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Full Backup
MyBackup.mdf
Sales Database (sales.mdf)
Objects and data Transaction Log records
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Full Backup
A B C D E F G
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Full Backup
A B C D E F G
Backup checkpointLog File
Backup File
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Full Backup
A B C D E F G
Log File
Backup File
A
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Full Backup
A B C D E F G
Log File
Backup File
A B
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Full Backup
A J C D E F G
Log File
Backup File
A B
B->J
C
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Full Backup
A J C D E F G
Log File
Backup File
A B
B->J
C D
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Full Backup
A J C D E F P
Log File
Backup File
A B
B->J
C D E F G
G->Pu
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Full Backup
A J C D E F P
Log File
Backup File
A B
B->J
C D E F G B->J
G->Pu
G->Pu
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Transaction Log Backups
Log File
B->J G->P A->B
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Transaction Log Backups
Log File
B->J G->P A->B
Log Backup File
B->J G->P A->B
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Transaction Log Backups
Log File
___ ___ ____
Log Backup File
B->J G->P A->B
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Differential Backups
• NOT INCREMENTAL
A B C D E F G
Data File
Differential Backup File
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Differential Backups
A B C D E F G
Data File
Full Backup File
A B C D E F G
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Differential Backups
A B G D E F G
Data File
Full Backup File
A B C D E F G
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Differential Backups
A B G D E F G
Data File
Full Backup File
A B C D E F G
Differential Backup File
G (3)
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Differential Backups
A B G D E R G
Data File
Full Backup File
A B C D E F G
Differential Backup File
G (3)
R(6)
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Security
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Security Demo
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Security
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