RMAN备份动态性能视图 V$BACKUP_PIECE

V$BACKUP_PIECE displays information about backup pieces from the control file. Each backup set consists of one or more backup pieces.

V$BACKUP_PIECE显示有关从控制文件的备份片信息。每个备份集包含一个或多个备份片。

Column	Datatype	Description
RECID	NUMBER	Backup piece record ID
STAMP	NUMBER	Backup piece record stamp
SET_STAMP	NUMBER	Backup set stamp
SET_COUNT	NUMBER	Backup set count
PIECE#	NUMBER	Backup piece number (1-N)
COPY#	NUMBER	Indicates the copy number for backup pieces created with duplex enabled. 1 if the backup piece is not duplexed. 表示启用双重备份功能创建的备份片的拷贝数。如果备份片不是双重的则为1。
DEVICE_TYPE	VARCHAR2(17)	Type of the device on which the backup piece resides. Set to DISK for backup sets on disk. See Also: V$BACKUP_DEVICE 在备份片驻留的设备类型。在磁盘上的备份设置为DISK。另请参见：V $ BACKUP_DEVICE。
HANDLE	VARCHAR2(513)	Backup piece handle identifies the backup piece on restore 备份片句柄定义了转储时的备份片
COMMENTS	VARCHAR2(64)	Comment returned by the operating system or storage subsystem. Set to NULL for backup pieces on disk. This value is informational only; not needed for restore. 通过操作系统或存储子系统返回的注释，磁盘上的备份片为NULL。设置为null在磁盘上的备份片。此值仅供参考;不需要恢复。
MEDIA	VARCHAR2(65)	Name of the media on which the backup piece resides. This value is informational only; not needed for restore. 在其上备份片驻留的媒体名称。此值仅供参考;不需要恢复。
MEDIA_POOL	NUMBER	The media pool in which the copy resides. This is the same value that was entered in the POOL operand of the Recovery ManagerBACKUP command. 副本所在的介质池，这和通过RMAN BACKUP命令进入POOL操作的值相同。
CONCUR	VARCHAR2(3)	(YES | NO) Indicates whether the piece on a media that can be accessed concurrently 表示备份片所在的介质是否可以被并发的访问。
TAG	VARCHAR2(32)	Backup piece tag. The tag is specified at backup set level, but stored at piece level. 备份片标签，标签在备份集级别指定，但存储在备份片级别。
STATUS	VARCHAR2(1)	Indicates the status of the piece: A(available), D (deleted), or X (expired) 表示备份片的状态，A为可用，D为已经删除，X为过期。
START_TIME	DATE	Starting time
COMPLETION_TIME	DATE	Completion time
ELAPSED_SECONDS	NUMBER	Number of elapsed seconds
DELETED	VARCHAR2(3)	(YES/NO) NO indicates that the file still exists.YES indicates the file no longer exists because it has been deleted. NO表示文件仍然存在，YES表示文件再在存在，因为它已经被删除。
BYTES	NUMBER	Size of the backup piece (in bytes) 备份片大小（字节），可以用这个字段统计备份大小信息。
IS_RECOVERY_DEST_FILE	VARCHAR2(3)	Indicates whether the file was created in the fast recovery area (YES) or not (NO) 表明文件是否被创建在快速恢复区
RMAN_STATUS_RECID	NUMBER	Owning V$RMAN_STATUS record ID
RMAN_STATUS_STAMP	NUMBER	Owning V$RMAN_STATUS record stamp
COMPRESSED	VARCHAR2(3)	Indicates whether the backup piece is compressed (YES) or not (NO) 表示备份片是否被压缩
BACKED_BY_VSS	VARCHAR2(3)	Whether or not the file has been backed up by Volume Shadow Copy Service (VSS). This column is reserved for internal use. 文件是否被VSS备份，这个列被提供于内部使用。
ENCRYPTED	VARCHAR2(3)	A value of YES means an encrypted backup, otherwise not an encrypted backup. YES表示加密备份，否则为非加密备份。
BACKED_BY_OSB	VARCHAR2(3)	A value of YES means the backup was done to Oracle Secure Backup. Otherwise, backed up by other third party tape library. YES表示备份被设置为Oracle Secure Backup，否则备份为第三方带库。