进行归档恢复的时候数据库报以下错误：
RMAN-08591: WARNING: invalid archived log deletion policy查看ORA错误解释：
[oracle@021Y-SH-BKAP ~]$ oerr rman 8591
8591, 3, "WARNING: invalid archived log deletion policy"
// *Cause: An invalid ARCHIVELOG DELETION POLICY was supplied. The archived
// log deletion policy was APPLIED but there was no mandatory
// archived log destinations.
// *Action: One of the following:
// 1) Change archived log deletion policy using CONFIGURE command
// 2) Make one or more of standby destination as MANDATORY.说明这是由于备库是从主库获取的日志归档，而不是归档的传输者，因此该策略部符合该库的角色，进入rman工具：
[oracle@021Y-SH-BKAP ~]$ rman target /
Recovery Manager: Release 11.2.0.1.0 - Production on Mon Feb 2 13:59:10 2015
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (DBID=1394247230)
RMAN> show all;
using target database control file instead of recovery catalog
RMAN configuration parameters for database with db_unique_name ORCL are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/DBBK/oracle/backup/control%F.bkp';
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO SHIPPED TO STANDBY; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/DBBK/oracle/product/11.2.0.1.0/dbs/snapcf_orcl.f'; # default修改RMAN配置
RMAN> configure ARCHIVELOG DELETION POLICY clear;
