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

• 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