Oracle 参数 BACKUP_TAPE_IO_SLAVES 官方解释，作用，如何配置最优化建议
本站中文解释
BACKUP_TAPE_IO_SLAVES参数为Oracle提供支持磁带设备的I/O多线程技术的能力。它的取值范围是0到255，默认值为0，表示禁用该功能；设置为N时，表示启用N个线程来实现数据备份时读写数据。
设置BACKUP_TAPE_IO_SLAVES正确的方法是在可用磁带设备访问端口上，为每个端口设置参数BACKUP_TAPE_IO_SLAVES，将其值设置为1即可，其它的参数不用调整。
官方英文解释
BACKUP_TAPE_IO_SLAVES specifies whether I/O server processes (also called slaves) are used by Recovery Manager to back up, copy, or restore data to tape.
| Property | Description |
|---|---|
|
Parameter type |
Boolean |
|
Default value |
|
|
Modifiable |
|
|
Modifiable in a PDB |
No |
|
Range of values |
|
|
Basic |
No |
When the value is set to true, Oracle uses an I/O server process to write to or read from a tape device. When the value is set to false (the default), Oracle does not use I/O server process for backups. Instead, the shadow process engaged in the backup accesses the tape device.
Note:
You cannot perform duplexed backups unless you enable this parameter. Otherwise, Oracle returns an error. When this parameter is enabled, Recovery Manager will configure as many server processes as needed for the number of backup copies requested.
See Also:
-
Oracle Database Backup and
Recovery User’s Guide for more information on duplexed backups -
“DBWR_IO_SLAVES”
