RMAN备份动态性能视图 V$BACKUP_SET

V$BACKUP_SET displays information about backup sets from the control file. A backup set record is inserted after the backup set is successfully completed. Column Datatype Description RECID NUMBER Backup set record ID STAMP NUMBER Backup se

V$BACKUP_SET displays information about backup sets from the control file. A backup set record is inserted after the backup set is successfully completed.

Column	Datatype	Description
RECID	NUMBER	Backup set record ID
STAMP	NUMBER	Backup set record stamp
SET_STAMP	NUMBER	Backup set stamp. The backup set stamp and count uniquely identify the backup set. Primary key for theV$BACKUP_SET table, and the foreign key for the following tables: V$BACKUP_PIECE,V$BACKUP_DATAFILE,V$BACKUP_REDOLOG,V$BACKUP_CORRUPTION. 备份集标记。备份集标记和计数唯一地标识了备份集。
SET_COUNT	NUMBER	Backup set count. The backup set count is incremented by one every time a new backup set is started (if the backup set is never completed the number is "lost"). If the control file is re-created then the count is reset to 1. Therefore the count must be used with the stamp to uniquely identify a backup set. Primary key for theV$BACKUP_SET table, and the foreign key for the following tables: V$BACKUP_PIECE,V$BACKUP_DATAFILE,V$BACKUP_REDOLOG,V$BACKUP_CORRUPTION 备份集计数。每次一个新的备份集开始备份集计数会增加1。（如果备份集从来没有完成则编号“丢失”）。如果控制文件被重新创建则计数重置为1，因此计数必须和标记一起使用来唯一地标识一个备份集。
BACKUP_TYPE	VARCHAR2(1)	Type of files that are in this backup. If the backup contains archived redo logs, the value is L. If this is a datafile full backup, the value is D. If this is an incremental backup, the value is I.
CONTROLFILE_INCLUDED	VARCHAR2(3)	Set to YES if there is a control file included in this backup set, otherwise set to NO
INCREMENTAL_LEVEL	NUMBER	Location where this backup set fits into the database's backup strategy. Set to NULL for full datafile, archivelog, controlfile, and spfile backups, set to 0 for incremental level 0 datafile backups, and set to 1 for incremental level 1 datafile backups.
PIECES	NUMBER	Number of distinct backup pieces in the backup set
START_TIME	DATE	Starting time
COMPLETION_TIME	DATE	Time that this backup set completed
ELAPSED_SECONDS	NUMBER	The number of elapsed seconds
BLOCK_SIZE	NUMBER	Block size of the backup set
INPUT_FILE_SCAN_ONLY	VARCHAR2(3)	YES indicates no actual backup is performed, but the datafiles are read. NO indicates a normal backup is performed.
KEEP	VARCHAR2(3)	(YES/NO) Indicates whether or not this backup set has a retention policy that is different than the value for the configure retention policy
KEEP_UNTIL	DATE	If KEEP_UNTIL_TIME is specified, this is the date after which the backup becomes obsolete. If this column is null, then the backup never expires.
KEEP_OPTIONS	VARCHAR2(10)	Lists additional retention options for this backup set. Possible values are: LOGS - The logs need to recover this backup are kept NOLOGS - The logs needed to recover this backup will not be kept BACKUP_LOGS - An archive log backup exists to support this backup set
MULTI_SECTION	VARCHAR2(3)	Indicates whether or not this backup set is a multi-section backup. Valid values are YES andNO. A multi-section backup is a backup in which multiple backup pieces are produced independently in parallel by multiple channels.

该视图查看的信息与RMAN中命令LIST BACKUP类似，只不过表示形式不同。其中BACKUP_TYPE列标记该备份集中包含的文件类型，有下列几个值：

L：表示包含归档重做日志文件；

D：表示数据文件完全备份；

I：表示增量备份。

还有一个常用的关联视图V$BACKUP_SET_DETAILS，该视图除了包含V$BACKUP_SET中的数据外，还额外记录了备份集的详细信息，比如备份集大小、备份集所在设备等。额外的列也都比较简单，用字面意义理解列定义即可。