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.