Presentation on BackupPresentation on Backup
Group membersGroup members
Aneela MaqbooolAneela Maqboool
Saira NisarSaira Nisar
Tehmina Tehmina
Rabia Rabia
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
What is a Backup?What is a Backup?
• Backup is an additional copy of data Backup is an additional copy of data that can be used for restore and that can be used for restore and recovery purposesrecovery purposes
• This Backup copy can be created by:This Backup copy can be created by:– Simply coping data (there can be one or Simply coping data (there can be one or
more copies)more copies)– Mirroring data (the copy is always Mirroring data (the copy is always
updated with whatever is written to the updated with whatever is written to the primaryprimary
Backup StrategyBackup Strategy
A backup is put in place to avoid A backup is put in place to avoid permanent data loss to ensure permanent data loss to ensure the integrity of stored data i.e. the integrity of stored data i.e. can get back to a previous can get back to a previous version and build up the data version and build up the data correctly if current data found to correctly if current data found to be in error.be in error.
Recovery ProceduresRecovery Procedures
• A backup strategy needs a well A backup strategy needs a well documented and tested recovery documented and tested recovery procedure to ensure backup data procedure to ensure backup data is restored properlyis restored properly
Factors in recovery Factors in recovery procedure:procedure:
• A well documented procedure that A well documented procedure that allocates roles and responsibilities to staff. allocates roles and responsibilities to staff.
• Availability of alternative hardware and Availability of alternative hardware and accommodation if the originals have been accommodation if the originals have been destroyed.destroyed.
• Availability of original software such as the Availability of original software such as the customised operating system and customised operating system and application programs!application programs!
• That up-to-date backup data is readily That up-to-date backup data is readily availableavailable
Backup purposesBackup purposes
– Disaster RecoveryDisaster Recovery•Restores production data to an operational Restores production data to an operational
state after disasterstate after disaster
– OperationalOperational•Restore data in the event of data loss or Restore data in the event of data loss or
logical corruptions that may occur during logical corruptions that may occur during routine processingroutine processing
– ArchivalArchival•Preserve transaction records, email, and Preserve transaction records, email, and
other business work products for regulatory other business work products for regulatory compliancecompliance
Types of backupsTypes of backups
• Three basic types of backups:Three basic types of backups:
• Full backupsFull backups
• Differential backupsDifferential backups
• Incremental backupsIncremental backups
Full backupsFull backups
– full and complete backup of entire full and complete backup of entire systemsystemFull Backup
Su Su Su Su Su
Differential backupsDifferential backups
– storage of all files that have changed or storage of all files that have changed or been added since last full backupbeen added since last full backup
Su Su Su Su SuM T TW F S M T TW F S M T TW F S M T TW F S
Restoring from Differential Restoring from Differential BackupBackup
Files 1, 2, 3Files 1, 2, 3
MondayMonday
Full BackupFull BackupFull BackupFull Backup CumulativeCumulativeCumulativeCumulative
TuesdayTuesday
File 4File 4
CumulativeCumulativeCumulativeCumulative
WednesdayWednesday
Files 4, 5Files 4, 5
CumulativeCumulativeCumulativeCumulative
ThursdayThursday
Files 4, 5, 6Files 4, 5, 6 Files 1, 2, 3, 4, 5Files 1, 2, 3, 4, 5
ProductionProductionProductionProduction
FridFridayay
Key Features of Differential Key Features of Differential backupsbackups
– More files to be backed up, therefore it More files to be backed up, therefore it takes more time to backuptakes more time to backupand uses more storage spaceand uses more storage space
– Much faster restore because only the Much faster restore because only the last full and the last cumulativelast full and the last cumulativebackup must be appliedbackup must be applied
Incremental backupsIncremental backups
• only archives data that have been only archives data that have been modified that daymodified that day
Su Su Su
Su SuM T TW F S M T TW F S M T TW F S M T TW F S
Incremental backupIncremental backup
Files 1, 2, 3Files 1, 2, 3
MondayMonday
Full Backup IncrementalIncrementalIncrementalIncremental
TuesdaTuesdayy
File 4File 4
IncrementalIncrementalIncrementalIncremental
WednesdayWednesday
Updated File 3Updated File 3
IncrementalIncrementalIncrementalIncremental
ThursdayThursday
File 5File 5 Files 1, 2, 3, 4, 5Files 1, 2, 3, 4, 5
ProductionProductionProductionProduction
FridFridayay
Key Features of Incremental Key Features of Incremental backupsbackups
– Files that have changed since the last Files that have changed since the last backup are backed upbackup are backed up
– Fewest amount of files to be backed up, Fewest amount of files to be backed up, therefore faster backup and lesstherefore faster backup and less
• Backup clientBackup client– Sends backup data to backup server or Sends backup data to backup server or
storage nodestorage node
• Backup serverBackup server– Manages backup operations and Manages backup operations and
maintains backup catalogmaintains backup catalog
• Storage nodeStorage node– Responsible for writing data to backup Responsible for writing data to backup
devicedevice
Backup Architecture and Backup Architecture and ProcessProcess
Backup Architecture and Backup Architecture and ProcessProcess
Application Server/Backup Client
Backup Data
Backup Server/ Storage Node
Tape Library
Backup Data
Metadata Catalog
Backup OperationBackup OperationApplication Server and Backup Clients
1
2
7
3b4
3a
6
5
Backup ServerStorage Node Backup Device
Backup OperationBackup Operation
• Start the scheduled backup processStart the scheduled backup process• Backup data retrieves backup related information Backup data retrieves backup related information
from backup catalogfrom backup catalog• Backup server instructs storage node to local Backup server instructs storage node to local
backup media in backup devicebackup media in backup device• Backup server instruct backup clients to send its Backup server instruct backup clients to send its
metadata to the backup server and data to be metadata to the backup server and data to be backup to storage mode.backup to storage mode.
• Backup clients send data to storage nodeBackup clients send data to storage node• Storage node sends data to backup deviceStorage node sends data to backup device• Storage node sends media information to backup Storage node sends media information to backup
serversservers• Backup server update and records the statusBackup server update and records the status
Restore OperationRestore OperationApplication Server and Backup Clients
1
2
7
3b4
3a
6
5
Backup ServerStorage Node Backup Device
Restore OperationRestore Operation
• Backup server scans backup catalog to Backup server scans backup catalog to identify the data to be restore and the identify the data to be restore and the client that will receive data.client that will receive data.
• Backup servers instructs storage node to Backup servers instructs storage node to load backup media in backup device.load backup media in backup device.
• Data is read and send to backup client.Data is read and send to backup client.• Storage node sends restore metadata to Storage node sends restore metadata to
backup server.backup server.• Backup server updates catalog.Backup server updates catalog.
Backup TopologiesBackup Topologies
• There are 3 basic backup topologies:There are 3 basic backup topologies:– Direct Attached Based BackupDirect Attached Based Backup– LAN Based BackupLAN Based Backup– SAN Based BackupSAN Based Backup
Direct Attached BackupsDirect Attached Backups
Backup Server
Metadata
LAN
Application Serverand Backup Clientand Storage Node
Data
Backup Device
LAN Based BackupsLAN Based Backups
Application Server and Backup Client
LAN
Data
Backup Server
Backup DeviceStorage Node
SAN Based Backups (LAN Free)
Metadata
LAN FC SAN
DataBackup Server
Application Server and Backup Client
Storage Node
Backup Device
Backup Technology options
•Backup to Tape Physical Tape library
•Backup to tape
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
Backup to Tape
TapeTape
Data fromStream 1 Data from
Stream 2 Data fromStream 3
Tape Limitations
•Reliability
•Sequential Access
•Cannot be accessed by multiple host simultaneously
•Control environment for tape storage
•Wear and tear of tape
Backup to Disk
•Ease of implementation
•Fast access
•More reliable
•Random access
•Multiple host access
•Enhanced overall back and recovery performance
New Features
•File backup and restoreSimple and automatic protectionComplete PC™ backup and restoreBlock-level imageEntire computerServer backupFiles, folders, disks, common workloads
Backing up files and Backing up files and folders (file backup) folders (file backup)
• If you are going to create a full If you are going to create a full backup, type the file name in the backup, type the file name in the File Name File Name line, or use the file name line, or use the file name generator (a button to the right of generator (a button to the right of the line). If you select an existing the line). If you select an existing archive, it will be overwritten. archive, it will be overwritten.