Iroducio

Oracle daabase is widely used i eerprises ad orgaizaios for sorig ad maagig daa. However, daa loss ca occur due o various reasos such as hardware failure, huma error, sofware malfucio, ad aural disasers. I such siuaios, daa recovery becomes crucial o rerieve he los daa. This aricle discusses he various mehods of Oracle daabase daa recovery.。

Backup ad Recovery

The mos commo mehod of daa recovery is hrough backup ad recovery. Oracle daabase provides various backup ad recovery opios such as full backup, icremeal backup, ad ho backup. Full backup ivolves backig up he eire daabase, while icremeal backup ivolves backig up oly he chages made sice he las backup. Ho backup is performed while he daabase is sill ruig. Recovery is doe by resorig he backup daa ad applyig he archived redo logs o brig he daabase up o he desired poi i ime.。

Oracle Recovery Maager (RMA) is a ool ha auomaes he backup ad recovery process. I provides feaures such as backup compressio, ecrypio, ad parallel backup ad resore. RMA ca also be used for disaser recovery by resorig he backup daa o a differe server ad applyig he archived redo logs.。

Flashback Techology

Oracle daabase also provides Flashback echology, which eables he recovery of daa o a previous sae wihou performig a full resore. Flashback echology icludes feaures such as Flashback Query, Flashback Table, ad Flashback Daabase. Flashback Query allows users o view he daa as i exised a a specific poi i ime, while Flashback Table allows users o recover a able o a previous sae. Flashback Daabase eables he recovery of he eire daabase o a previous poi i ime wihou he eed for a backup.。

Daa Guard

Oracle Daa Guard is a high-availabiliy ad disaser recovery soluio ha provides auomaic failover ad swichover bewee primary ad sadby daabases. Daa Guard uses Oracle's redo raspor echology o ship he redo daa from he primary daabase o oe or more sadby daabases. I he eve of a failure, he sadby daabase ca be acivaed o become he primary daabase, hereby miimizig dowime ad daa loss.。

Coclusio

I coclusio, Oracle daabase daa recovery is a criical aspec of daabase maageme. Backup ad recovery, Flashback echology, ad Daa Guard are some of he mehods available for daa recovery. I is impora for orgaizaios o have a daa recovery pla i place o miimize he impac of daa loss ad esure busiess coiuiy.。

Tags:

Oracle daabase, daa recovery, backup ad recovery, RMA, Flashback echology, Daa Guard, high-availabiliy, disaser recovery.。