OCP-043 alter diskgroup add template

68. You have a disk group, DGROUP1, with three disks and NORMAL redundancy. You execute the
following command to create a template for the disk group:
ALTER DISKGROUP dgroup1
ADD TEMPLATE my_temp
ATTRIBUTES (MIRROR FINE);
Which statement is true?

A.When a file is created in DGROUP1 with the template, it would have threeway
mirroring.
B.When a file is created in DGROUP1, the MY_TEMP template becomes the default template.
C.When a file is created in DGROUP1 with the template, it would have two-way  mirroring and file striping.
D.When a file is created in DGROUP1 with the template, it would have three-way mirroring and file striping.
E.When a file is created in DGROUP1 with the template, it would have two-way mirroring but no file striping.

Answer: C

diskgroup_template_clauses

A template is a named collection of attributes. When you create a disk group, Automatic Storage Management associates a set of initial system default templates with that disk group. The attributes defined by the template are applied to all files in the disk group. The table that follows lists the system default templates and the attributes they apply to the various file types. The diskgroup_template_clauses described following the table let you change the template attributes and create new templates.

You cannot use this clause to change the attributes of a disk group file after it has been created. Instead, you must use Recovery Manager (RMAN) to copy the file into a new file with the new attributes.

Table 10-2 Automatic Storage Management System Default File Group Templates

Template Name	File Type	External Redundancy	Normal Redundancy	High Redundancy	Striped
CONTROL	Control files	Unprotected	2-way mirror	3-way mirror	Fine
DATAFILE	Datafiles and copies	Unprotected	2-way mirror	3-way mirror	Coarse
ONLINELOG	Online logs	Unprotected	2-way mirror	3-way mirror	Fine
ARCHIVELOG	Archive logs	Unprotected	2-way mirror	3-way mirror	Coarse
TEMPFILE	Tempfiles	Unprotected	2-way mirror	3-way mirror	Coarse
BACKUPSET	Datafile backup pieces, datafile incremental backup pieces, and archive log backup pieces	Unprotected	2-way mirror	3-way mirror	Coarse
PARAMETERFILE	SPFILEs	Unprotected	2-way mirror	3-way mirror	Coarse
DATAGUARDCONFIG	Disaster recovery configurations (used in standby databases)	Unprotected	2-way mirror	3-way mirror	Coarse
FLASHBACK	Flashback logs	Unprotected	2-way mirror	3-way mirror	Fine
CHANGETRACKING	Block change tracking data (used during incremental backups)	Unprotected	2-way mirror	3-way mirror	Coarse
DUMPSET	Data Pump dumpset	Unprotected	2-way mirror	3-way mirror	Coarse
XTRANSPORT	Cross-platform converted datafile	Unprotected	2-way mirror	3-way mirror	Coarse
AUTOBACKUP	Automatic backup files	Unprotected	2-way mirror	3-way mirror	Coarse

ADD TEMPLATE Use this clause to add one or more named templates to a disk group. To determine the names of existing templates, query theV$ASM_TEMPLATE dynamic performance view.

ALTER TEMPLATE Use this clause to modify the attributes of a system default or user-defined disk group template. Only the specified attributes are altered. Unspecified properties retain their current values.

template_name Specify the name of the template to be added or modified. Template names are subject to the same naming conventions and restrictions as database schema objects. Please refer to "Schema Object Naming Rules" for information on database object names.

Redundancy Level Specify the redundancy level of the newly added or modified template:

• UNPROTECTED: Files to which this template are applied are not protected by Automated Storage Management from media failures. Disks taken offline, either through system action or by user command, can cause loss of unprotected files. UNPROTECTED is the only valid setting for external redundancy disk groups. UNPROTECTED may not be specified for templates in high redundancy disk groups. Oracle discourages the use of unprotected files in high and normal redundancy disk groups.

• MIRROR:Files to which this template are applied are protected by mirroring their data blocks. In normal redundancy disk groups, each primary extent has one mirror extent (2-way mirroring). For high redundancy disk groups, each primary extent has two mirror extents (3-way mirroring). You cannot specify MIRROR for templates in external redundancy disk groups.

Disk Striping Specify how the files to which this template are applied will be striped:

• FINE:Files to which this template are applied are striped every 128KB.

• COARSE: Files to which this template are applied are striped every 1MB.