The document provides an overview of backup strategies and technologies. It discusses different types of backups including full, differential, and incremental backups. It covers backup architecture including backup clients, servers, and storage nodes. Key aspects of the backup process and restore process are outlined. Different backup topologies of direct attached, LAN-based, and SAN-based backups are described. Options for backup technology include backing up to tape or disk. Features of Acronis backup software are briefly mentioned.

1. Presentation on Backup
Group members
Aneela Maqboool
Saira Nisar
Tehmina
Rabia

2. Outline
• What is backup
• Backup strategy
• Recovery procedures
• Factors in recovery procedures
• Backup purposes
• Types of backup
• Backup architecture and process
• Backup topologies
• Backup technology options
• Features
• Installation of Acronis

3. What is a Backup?
• Backup is an additional copy of data that
can be used for restore and recovery
purposes
• This Backup copy can be created by:
– Simply coping data (there can be one or more
copies)
– Mirroring data (the copy is always updated
with whatever is written to the primary

4. Backup Strategy
A backup is put in place to avoid
permanent data loss to ensure the
integrity of stored data i.e. can get
back to a previous version and
build up the data correctly if current
data found to be in error.

5. Recovery Procedures
• A backup strategy needs a well
documented and tested recovery
procedure to ensure backup data is
restored properly

6. Factors in recovery
procedure:
• A well documented procedure that allocates
roles and responsibilities to staff.
• Availability of alternative hardware and
accommodation if the originals have been
destroyed.
• Availability of original software such as the
customised operating system and application
programs!
• That up-to-date backup data is readily available

7. Backup purposes
– Disaster Recovery
• Restores production data to an operational state
after disaster
– Operational
• Restore data in the event of data loss or logical
corruptions that may occur during routine
processing
– Archival
• Preserve transaction records, email, and other
business work products for regulatory compliance

8. Types of backups
• Three basic types of backups:
• Full backups
• Differential backups
• Incremental backups

9. Full backups
– full and complete backup of entire system
Full Backup
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10. Differential backups
– storage of all files that have changed or been
added since last full backup
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11. Restoring from Differential Backup
Monday Tuesday Wednesday Thursday Frida
y
Files 1, 2, 3 File 4 Files 4, 5 Files 4, 5, 6 Files 1, 2, 3, 4, 5
Full Backup Cumulative Cumulative Cumulative
Production

12. Key Features of Differential
backups
– More files to be backed up, therefore it takes
more time to backup
and uses more storage space
– Much faster restore because only the last full
and the last cumulative
backup must be applied

13. Incremental backups
• only archives data that have been
modified that day
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u

14. Incremental backup
Monday Tuesda Wednesday Thursday Frida
y y
Files 1, 2, 3 File 4 Updated File 3 File 5 Files 1, 2, 3, 4, 5
Full Backup Incremental Incremental Incremental
Production

15. Key Features of Incremental
backups
– Files that have changed since the last backup
are backed up
– Fewest amount of files to be backed up,
therefore faster backup and less

16. Backup Architecture and
Process
• Backup client
– Sends backup data to backup server or
storage node
• Backup server
– Manages backup operations and maintains
backup catalog
• Storage node
– Responsible for writing data to backup device

17. Backup Architecture and
Process
og
Catal
adata
Met
Backup Data
Ba
cku
pD
ata
Application Server/ Backup Server/ Tape Library
Backup Client Storage Node

18. Backup Operation
Application Server and Backup Clients
3b
4
1 5
3a
2
6
7
Storage Node Backup Device
Backup Server

19. Backup Operation
• Start the scheduled backup process
• Backup data retrieves backup related information from
backup catalog
• Backup server instructs storage node to local backup
media in backup device
• Backup server instruct backup clients to send its
metadata to the backup server and data to be backup to
storage mode.
• Backup clients send data to storage node
• Storage node sends data to backup device
• Storage node sends media information to backup
servers
• Backup server update and records the status

20. Restore Operation
Application Server and Backup Clients
3b
4
1 5
3a
2
6
7
Storage Node Backup Device
Backup Server

21. Restore Operation
• Backup server scans backup catalog to identify
the data to be restore and the client that will
receive data.
• Backup servers instructs storage node to load
backup media in backup device.
• Data is read and send to backup client.
• Storage node sends restore metadata to backup
server.
• Backup server updates catalog.

22. Backup Topologies
• There are 3 basic backup topologies:
– Direct Attached Based Backup
– LAN Based Backup
– SAN Based Backup

23. Direct Attached Backups
Metadata
Data
LAN
Backup Server Application Server
and Backup Client Backup Device
and Storage Node

24. LAN Based Backups
Application Server
and Backup Client Backup Server
LAN
Data
Storage Node Backup Device

25. SAN Based Backups (LAN
Free)
FC SAN
LAN
Metadata Data
Backup Backup Device
Server
Application Server
and Backup Client
Storage Node

26. Backup Technology options
• Backup to Tape
 Physical Tape library
• Backup to tape

27. Backup to Tape
• Traditional destination for backup
• Low cost option
• Sequential / Linear Access
• Multiple streaming
– Backup streams from multiple clients to a
single backup device

28. Backup to Tape
Data from
Stream 1 Data from
Stream 2 Data from
Stream 3
Tape

29. Tape Limitations
• Reliability
• Sequential Access
• Cannot be accessed by multiple host
simultaneously
• Control environment for tape storage
• Wear and tear of tape

30. Backup to Disk
• Ease of implementation
• Fast access
• More reliable
• Random access
• Multiple host access
• Enhanced overall back and recovery
performance

31. New Features
• File backup and restore
Simple and automatic protection
Complete PC™ backup and restore
Block-level image
Entire computer
Server backup
Files, folders, disks, common workloads

32. Backing up files and
folders (file backup)

33. • If you are going to create a full backup,
type the file name in the File Name line,
or use the file name generator (a button to
the right of the line). If you select an
existing archive, it will be overwritten.