Fully Qualified File Name Form

You can use a fully qualified form for referencing existing Oracle ASM files in Oracle ASM operations, except for disk group creation. This form is the Oracle ASM file name that Oracle ASM automatically generates when an Oracle ASM file is created.

A fully qualified file name has the following form:

+diskgroup/dbname/filetype/filetypetag.file.incarnation

Where:

  • +diskgroup is the disk group name preceded by a plus sign.

    You can think of the plus sign (+) as the root directory of the Oracle ASM file system, similar to the slash (/) on UNIX or Linux computers.

  • dbname is the DB_UNIQUE_NAME of the database to which the file belongs.

  • filetype is the Oracle file type and can be one of the file types shown in Table 5-3.

  • filetypetag is type-specific information about the file and can be one of the tags shown in Table 5-3.

  • file.incarnation is the file/incarnation pair, used to ensure uniqueness.

An example of a fully qualified Oracle ASM file name is:

+data/orcl/controlfile/Current.256.541956473

Table 5-3 Oracle file types and Oracle ASM file type tags

Oracle ASM File Type Description Oracle ASM File Type Tag Comments

CONTROLFILE

Control files and backup control files

Current

Backup

Archive

Backup

DATAFILE

Data files and data file copies

tblspname

Name of the tablespace into which the file is added

ONLINELOG

Online logs

group_loggroup#

  

ARCHIVELOG

Archive logs

thread_thread#_seq_sequence#

  

TEMPFILE

Tempfiles

tsname

Name of the tablespace into which the file is added

BACKUPSET

Data file and archive log backup pieces; data file incremental backup pieces

spfile?_timestamp

spfile? can take one of two values: s indicates that the backup set includes the spfile; n indicates that the backup set does not include the spfile.

timestamp is the time that the backup is started.

PARAMETERFILE

Persistent parameter files

spfile

Name of the SPFILE

DATAGUARDCONFIG

Data Guard configuration file

db-unique-name

Data Guard uses the value of the DB_UNIQUE_NAME initialization parameter.

FLASHBACK

Flashback logs

log_flashbacklog#

  

CHANGETRACKING

Block change tracking data

ctf

Used during incremental backups

DUMPSET

Data Pump dumpset

user_obj#_file#

Dump set files encode the user name, the job number that created the dump set, and the file number as part of the tag.

XTRANSPORT

Data file convert

tblspname

Name of the tablespace where the Oracle ASM metadata is added

AUTOBACKUP

Automatic backup files

spfile?_timestamp

spfile? can take one of two values: s indicates that the backup set includes the spfile; n indicates that the backup set does not include the spfile.

timestamp is the time that the backup is started.

ASMPARAMETERFILE

Oracle ASM persistent parameter files

spfile

Name of the Oracle ASM SPFILE

OCRFILE

Oracle Clusterware Registry files

ocrfile

Name of the OCR files