Lab SQL Server 2008 Lab # 2

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BACKUP & KHI PHC DATABASE SQL SERVER 2008

I. Full Backup

bt u, chng ti bt u bng gii thiu v Full Backups, Full Backups c th c hiu l mt cch n gin nht cung cp mt gii php backup hon tt. Full Backup s to mt file cha ton b c s d liu, gm c Transaction Logs. (Trong phn tip theo chng ti s gii thiu v Transaction Logs v cc m hnh khi phc Recovery Models). Khi xem mt c s d liu t bn trong SQL Server Management Studio Object Explorer, bn s bt gp mt s i tng khc nhau nh Tables, Views, Stored Procedures v Security.

Tt c cc i tng ny u c gp bn trong mt file backup y ca SQL Server. to mt backup, bn hy kch vo c s d liu, chn Tasks sau kch Backup. Thao tc ny s lm xut hin ca s Back Up Database vi cc thit lp General. Source s c in bng c s d liu m bn chn. Bo m rng ty chn Full phi c la chn cho kiu backup ny.

Cc ty chn khc nh Differential v Transaction Log cng s c gii thiu n trong phn sau. Trong phn Backup Component, bn hy chn Database.

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Lab SQL Server 2008 Lab # 2

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Mt nt ty chn khc l Files and Filegroups cng c s dng khi c s d liu c to m rng thnh nhiu file trn h iu hnh. Vn ny i khi c thc hin trn cc c s d liu rt ln nhm tng vn hiu xut. Nu bn nm trong trng hp ny, hy chn c s d liu c bt k v tt c Filegroup.

Tip n, t tn cho backup v phn m t cho n.

Phn tip theo Backup set will expire c th c s dng khi backup vo bng hoc to cc nhm backup Media Sets. Trong v d ny, chng ti s backup vo mt a cng v vy mc nh s l sau 0 ngy.

Ty chn cui cng trn mn hnh ny nh v a im cho backup. Mc nh SQL Server s t tt c cc backup vo th mc MSSQL\Backup. Cc backup c kt thc bng mt m rng .BAK. D iu ny l khng cn thit nhng bn cn lu rng c nhiu file ch c th c ch nh nh hnh bn di.

iu ny c th cho php cc backup SQL tri rng trn cc a cng khc. Trong v d trn, c hai file u c yu cu cho Restore. K thut ny cng c th c s dng m rng cc backup trn nhiu bng khi mi trng ca bn qu nh cho vic nm gi ton b c s d liu trn mt bng.

kim tra cc la chn, bn hy chn Options t menu pha trn bn phi.

Tp cc ty chn u tin c dn nhn Overwrite Media.

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Lab SQL Server 2008 Lab # 2

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Tp ny c s dng in hnh khi backup vo bng. Cn khi backup vo a cng, nu bn s dng tn duy nht cho backup ca bn trn mn hnh trc th cc ty chn ny c th c b qua. Nu tn backup khng duy nht, hy chn nt Overwrite All existing backup sets. Thao tc ny s to mt file ch c backup gn nht trong . Khi mun khi phc t file ny, bn s c nhc nh chn thit lp backup no c tr khi phc.

Trong phn tip theo, Reliability, chn Verify backup when finished bo m backup ca bn hp l.

Phn Transaction Log s c hin th mu xm v Full Backup s t ng b bt file bn ghi.

Phn cui cng gm c cc ty chn cho vic nn (ch c cho SQL Server 2008). Tnh nng nn Compression l mt tnh nng mi trong SQL Server 2008. N c th gim c n 20% kch thc vt l ca file gc. Nu tnh nng ny c s dng, Restore s t ng nhn ra file nn ny. Tuy nhin c mt im yu i vi tnh nng ny l chim dng nhiu ti nguyn my tnh trong sut qu trnh backup.

Kch nt OK trong phn gc di bn phi bt u qu trnh backup. Khi backup hon tt, mt thng bo s xut hin v ni rng qu trnh hon tt.

II. Dng lnh Backup cng c th c thc hin t ca s dng lnh hoc bng kch bn. thc thi mt backup bng TSQL, bn hy m mt Query Window mi ( m Query Window, t Management Studio, bn kch nt New Query gc trn bn phi). Cu lnh di y s thc thi Full backup vo a cng.

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Lab SQL Server 2008 Lab # 2

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BACKUP DATABASE AdventureWorksLT2008 TO DISK = 'C:\Program Files\Microsoft SQL

Server\MSSQL10.MSSQLSERVER\MSSQL\Backup\test.bak' WITH FORMAT;

Cu lnh backup bt u bng vic ch ra c s d liu c backup. Tuy nhin khng c cch no c th thc hin backup tt c cc c s d liu m chng ch c th c thc hin mt cch ring l. Chng ti s gii thiu cho cc bn mt kch bn n gin v mt nhim v trong c nhm tt c cc c s d liu. Cu lnh tip theo ch nh rng chng ta s backup vo a v ch ca file. Nu chng ta backup vo bng, hy s dng To TAPE thay cho To Disk. Cui cng, With Format c ngha to mt file mi. Khng c cu lnh cui cng nu backup tn ti th backup mi ca bn s gn thm vo n.

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