Ndezvipi redo matanda ari Oracle RDBMS?
Context:In Oracle RDBMS zvakatipoteredza, kuitazve matanda vanosanganisira mafaira ari proprietary pamanyorerwo kuti matanda nhoroondo kuchinja zvose zvakaitwa kuti Database. Faira rimwe nerimwe rezvinyorwa zvekudzokorora rine zvinyorwa zvekudzokorora. Redo rekodhi, inonziwo redo yekupinda, inobata boka rekuchinja vectors, rimwe nerimwe rinorondedzera kana rinomiririra shanduko yakaitwa kune imwechete block mune dhatabhesi.  Somuenzaniso, kana mushandisi UPDATES muhoro-ukoshi ari tafura rine mushandi-chokuita mashoko, ari DBMS kunobereka redo chinyorwa rine shanduko vectors kuti tsanangura kuchinja mashoko chidimbu misa kuti tafura. Uye kana mushandisi ipapo COMMITs ari update, Oracle kunokonzera mumwe redo chinyorwa uye rinopa kuchinja "hurongwa shanduko nhamba" (SCN).  Pose apo chimwe chinhu chinoshanduka mufaira redata, Oracle inonyora chinjo yacho mugwaro rokudzokorora. Zita rekudzokorora rinoratidza chinangwa charo: Kana dhatabhesi rikadonha, iyo RDBMS inogona kuitazve (kugadzirisazve) shanduko dzese pamafaira e data ayo anotora dhatabhesi dhata kudzokera kunzvimbo yaive apo rekodhi yekupedzisira yekugadzirisa yakanyorwa. DBAs vanoshandisa maonero V$LOG, V$LOGFILE, V$LOG_HISTORY uye V$THREAD kuwana mashoko pamusoro redo gwaro Database. Re-do log file imwe neimwe ndeyerimwe boka (iro rinofanira kunge riine mapoka maviri). Chaizvoizvo rimwe remapoka aya ndiro boka reCURRENT (rinogona kubvunzwa richishandisa mamiriro ekoramu yev$log). Oracle anoshandisa boka iroro razvino kunyora zvinyorwa zvebhuku rokudzokorora. Apo boka rakazara, chinja chinyorwa chinoitika, kuchiita rimwe boka riripo iye zvino. Shanduko yega yega yekupinda inokonzeresa nzvimbo yekutarisa, zvisinei, zvinopesana hazvisi zvechokwadi: nzvimbo yekutarisa haina kukonzera kudzokorora log switch. Mumwe anogonawo manually kukonzera redo-log chinja vachishandisa ALTER SYSTEM SWITCH LOGFILE murayiro.
In Oracle RDBM, redo matanda ndiwo matanda anoshandiswa kuchengeta nhoroondo kuchinja ari Database. Redo rimwe nerimwe rinobatanidzwa nefaira rine zvinyorwa zvakawanda zvinobata boka rechinjo dzezvinhu. Redo zvinyorwa zvinogona kushandiswa kushandisa kuchinja Database kana kwakarovera uye kunobatsirawo kusika incremental backups.