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?
Both are important
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01011001
Full Backup
Sales Database (sales.mdf)
Full Backup
Data
Sales Database (sales.mdf)
Free Space
Full Backup
MyBackup.bak
Sales Database (sales.mdf)
Full Backup
MyBackup.mdf
Sales Database (sales.mdf)
Objects and data Transaction Log records
Full Backup
A B C D E F G
Full Backup
A B C D E F G
Backup checkpointLog File
Backup File
Full Backup
A B C D E F G
Log File
Backup File
A
Full Backup
A B C D E F G
Log File
Backup File
A B
Full Backup
A J C D E F G
Log File
Backup File
A B
B->J
C
Full Backup
A J C D E F G
Log File
Backup File
A B
B->J
C D
Full Backup
A J C D E F P
Log File
Backup File
A B
B->J
C D E F G
G->Pu
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
Transaction Log Backups
Log File
B->J G->P A->B
Transaction Log Backups
Log File
B->J G->P A->B
Log Backup File
B->J G->P A->B
Transaction Log Backups
Log File
___ ___ ____
Log Backup File
B->J G->P A->B
Differential Backups
• NOT INCREMENTAL
A B C D E F G
Data File
Differential Backup File
Differential Backups
A B C D E F G
Data File
Full Backup File
A B C D E F G
Differential Backups
A B G D E F G
Data File
Full Backup File
A B C D E F G
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)
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
Security Demo
Security
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