Oracle Kurs

Struktura bazy danych oracle

Struktura bazy danych oracle

W bazie oracle możemy wyróżnić następujące struktury:

- logiczna,

- fizyczna i

- recovery.

Struktura logiczna czyli tablespaces które są rozpoznawane tylko przez bazę, nie jest znana dla systemu operacyjnego.

Struktura fizyczna to wszystkie fizyczne pliki na których jest zbudowana baza danych.

Struktura recovery to redo logs, flash recovery area.

W strukturze logicznej jak już wcześniej wspomniałem są:

- tablespaces,

- baza danych oracle może mieć dużo tablespaces: do głównych i w większości przypadków “obowiązkowych” należą następujące tablespace: SYSTEM, UNDO, TEMP inne to USER, SYSAUX, APLICATION itp.

W strukturze fizycznej znajdują się:

- datafiles na których są zbudowane tablespaces,

- tempfile,

- password file,

- plik parametrów,

- controlfile.

Struktura recovery to:

- redo logs,

- archive logs,

- backup set.

Baza danych składa się ze struktury logicznej i fizycznej.

Tags: baza danych, controlfile, datafiles, flash recovery area, oracle, password file, recovery, redo logs, struktura bazy danych oracle, struktura logiczna i struktura fizyczna, sysaux, system, system operacyjny, tablespace, temp, tempfile, undo, user

This entry was posted on środa, czerwiec 25th, 2008 at 22:19 and is filed under baza danych oracle. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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Struktura bazy danych oracle

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