Location of physical files (v$logfile,v$datafile,v$controlfile,v$arcguved_log,v$parameter, password files, alarm files) of the physical structure of the Oracle database

Source: Internet
Author: User

    • databae = physical files, logical structures that compose physical files
    • View database name

Sql> Show Parameter Db_nam

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

Db_name string Gaga01

Sql> select name from V$database;

NAME

---------

GAGA01

Sql>

To view the instance name:

Sql> Show Parameter Instance_n

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

instance_name string Gaga01

Instance_number integer 0

Sql> select instance_name from V$instance;

Instance_name

----------------

Gaga01

View data files, control files:

Sql> select name from V$datafile;

NAME

--------------------------------------------------------------------------------

/u01/app/oracle/oradata/gaga01/system01.dbf

/u01/app/oracle/oradata/gaga01/sysaux01.dbf

/u01/app/oracle/oradata/gaga01/undotbs01.dbf

/u01/app/oracle/oradata/gaga01/users01.dbf

Sql> select name from V$controlfile;

NAME

--------------------------------------------------------------------------------

/u01/app/oracle/oradata/gaga01/control01.ctl

/u01/app/oracle/fast_recovery_area/gaga01/control02.ctl

viewing log files

sql> Select member from v$logfile;

MEMBER

--------------------------------------------------------------------------------

/u01/app/oracle/oradata/gaga01/redo03.log

/u01/app/oracle/oradata/gaga01/redo02.log

/u01/app/oracle/oradata/gaga01/redo01.log

View archived Files:

Sql> select name from V$archived_log;

To view the parameter file:

Sql> Select Name,value from V$parameter where name= ' spfile ';

NAME

--------------------------------------------------------------------------------

VALUE

--------------------------------------------------------------------------------

SPFile

/u01/app/oracle/product/11.2.4/dbhome_1/dbs/spfilegaga01.ora

View Password file

sql> ho ls $ORACLE _home/dbs/orapw$oracle_sid

/u01/app/oracle/product/11.2.4/dbhome_1/dbs/orapwgaga01

Alarm log: Bdump release warning log

sql> ho ls $ORACLE _base/admin/$ORACLE _sid

Adump dpdump pfile

Logical Structure ~~~~~ Follow-up learning ~ ~

d ata File

record information in all relational databases

control file Control files

record the structure and behavior of the database

redo log file

Action of record block change

in groups, under Group is member

Write the log according to the group in order to write

For instance recovery

Alter Log

Other log

archived log files archive logfile

 

The log files are written sequentially, from one group to the next group called Toggle, write 1 , 2 , 3 , and then write 1 , then write 1 will put 1 the content is overwritten.

So will overwrite the previous log retention, archived log open a process ARCN, log to the archive log

parameter file parameter files (required for database run)

parameter file is divided into 2 pfile and spfile

Log database configuration information equivalent to some switches

Password File Password files

Used to control SYSDBA users when logging in remotely

Location of physical files (v$logfile,v$datafile,v$controlfile,v$arcguved_log,v$parameter, password files, alarm files) of the physical structure of the Oracle database

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