Q：$archived_log中显示creator有多种，如果是FGRD，这可能是alter system archive log current，那么还有看到是RMAN，这是怎么产生的？
A：可能是这些archive之前被rman catalog过。见下面的testcase：
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[oracle10g@testdb archivelog]$ cd 2014_09_28 [oracle10g@testdb 2014_09_28]$ ls o1_mf_1_51_b2g3dm1s_.arc o1_mf_1_52_b2g3f81q_.arc o1_mf_1_53_b2g467rk_.arc o1_mf_1_54_b2g469qm_.arc o1_mf_1_55_b2g46fqr_.arc [oracle10g@testdb 2014_09_28]$ mkdir -p /tmp/arctmp [oracle10g@testdb 2014_09_28]$ mv *.arc /tmp/arctmp/ [oracle10g@testdb 2014_09_28]$ cd /tmp/arctmp [oracle10g@testdb arctmp]$ ls o1_mf_1_51_b2g3dm1s_.arc o1_mf_1_52_b2g3f81q_.arc o1_mf_1_53_b2g467rk_.arc o1_mf_1_54_b2g469qm_.arc o1_mf_1_55_b2g46fqr_.arc [oracle10g@testdb arctmp]$ [oracle10g@testdb arctmp]$ [oracle10g@testdb arctmp]$ [oracle10g@testdb arctmp]$ rman target / Recovery Manager: Release 10.2.0.5.0 - Production on Sun Sep 28 03:34:06 2014 Copyright (c) 1982, 2007, Oracle. All rights reserved. connected to target database: ORA10G (DBID=4148492656) RMAN> crosscheck archivelog all; using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: sid=142 devtype=DISK validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_07_17/o1_mf_1_3_9wfokdfm_.arc recid=3 stamp=853127084 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_07_17/o1_mf_1_4_9wfokddk_.arc recid=1 stamp=853127084 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_07_17/o1_mf_1_5_9wfokdds_.arc recid=2 stamp=853127084 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_07_18/o1_mf_1_1_9wjs3np7_.arc recid=4 stamp=853229047 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_07_18/o1_mf_1_2_9wjs7h24_.arc recid=5 stamp=853229167 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_07_24/o1_mf_1_3_9x0bpc79_.arc recid=6 stamp=853738571 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_07_24/o1_mf_1_4_9x0pnnfx_.arc recid=7 stamp=853750807 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_07_24/o1_mf_1_5_9x0pnt67_.arc recid=8 stamp=853750813 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_04/o1_mf_1_6_9xxrcb9z_.arc recid=9 stamp=854702835 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_12/o1_mf_1_7_9yl8c2j5_.arc recid=10 stamp=855374564 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_20/o1_mf_1_8_9z7vvndx_.arc recid=11 stamp=856082678 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_9_9zqk95rq_.arc recid=12 stamp=856596133 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_10_9zqkhdc0_.arc recid=13 stamp=856596333 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_11_9zqlbb40_.arc recid=14 stamp=856597196 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_12_9zqlbkyg_.arc recid=15 stamp=856597205 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_13_9zqlby6j_.arc recid=16 stamp=856597219 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_14_9zqlcnrt_.arc recid=17 stamp=856597236 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_15_9zqlcofb_.arc recid=18 stamp=856597237 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_16_9zqlcoyv_.arc recid=19 stamp=856597237 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_17_9zqlcpjc_.arc recid=20 stamp=856597238 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_18_9zqlcq1p_.arc recid=21 stamp=856597239 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_19_9zqlcqjb_.arc recid=22 stamp=856597239 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_20_9zqld0n4_.arc recid=23 stamp=856597250 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_21_9zqldjv8_.arc recid=24 stamp=856597266 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_22_9zqldrbl_.arc recid=25 stamp=856597272 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_23_9zqldsy9_.arc recid=26 stamp=856597274 validation succeeded for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_24_9zqldt4t_.arc recid=27 stamp=856597274 validation failed for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_51_b2g3dm1s_.arc recid=28 stamp=859432723 validation failed for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_52_b2g3f81q_.arc recid=29 stamp=859432744 validation failed for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_53_b2g467rk_.arc recid=30 stamp=859433543 validation failed for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_54_b2g469qm_.arc recid=31 stamp=859433545 validation failed for archived log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_55_b2g46fqr_.arc recid=32 stamp=859433549 Crosschecked 32 objects RMAN> delete expired archivelog all; released channel: ORA_DISK_1 allocated channel: ORA_DISK_1 channel ORA_DISK_1: sid=142 devtype=DISK List of Archived Log Copies Key Thrd Seq S Low Time Name ------- ---- ------- - --------- ---- 28 1 51 X 28-SEP-14 /u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_51_b2g3dm1s_.arc 29 1 52 X 28-SEP-14 /u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_52_b2g3f81q_.arc 30 1 53 X 28-SEP-14 /u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_53_b2g467rk_.arc 31 1 54 X 28-SEP-14 /u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_54_b2g469qm_.arc 32 1 55 X 28-SEP-14 /u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_55_b2g46fqr_.arc Do you really want to delete the above objects (enter YES or NO)? Y deleted archive log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_51_b2g3dm1s_.arc recid=28 stamp=859432723 deleted archive log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_52_b2g3f81q_.arc recid=29 stamp=859432744 deleted archive log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_53_b2g467rk_.arc recid=30 stamp=859433543 deleted archive log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_54_b2g469qm_.arc recid=31 stamp=859433545 deleted archive log archive log filename=/u01/ora10g/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_28/o1_mf_1_55_b2g46fqr_.arc recid=32 stamp=859433549 Deleted 5 EXPIRED objects RMAN> RMAN> RMAN> RMAN> exit Recovery Manager complete. [oracle10g@testdb arctmp]$ [oracle10g@testdb arctmp]$ [oracle10g@testdb arctmp]$ rman target / Recovery Manager: Release 10.2.0.5.0 - Production on Sun Sep 28 03:35:11 2014 Copyright (c) 1982, 2007, Oracle. All rights reserved. connected to target database: ORA10G (DBID=4148492656) RMAN> catalog start with '/tmp/arctmp'; using target database control file instead of recovery catalog searching for all files that match the pattern /tmp/arctmp List of Files Unknown to the Database ===================================== File Name: /tmp/arctmp/o1_mf_1_55_b2g46fqr_.arc File Name: /tmp/arctmp/o1_mf_1_53_b2g467rk_.arc File Name: /tmp/arctmp/o1_mf_1_54_b2g469qm_.arc File Name: /tmp/arctmp/o1_mf_1_52_b2g3f81q_.arc File Name: /tmp/arctmp/o1_mf_1_51_b2g3dm1s_.arc Do you really want to catalog the above files (enter YES or NO)? Y cataloging files... cataloging done List of Cataloged Files ======================= File Name: /tmp/arctmp/o1_mf_1_55_b2g46fqr_.arc File Name: /tmp/arctmp/o1_mf_1_53_b2g467rk_.arc File Name: /tmp/arctmp/o1_mf_1_54_b2g469qm_.arc File Name: /tmp/arctmp/o1_mf_1_52_b2g3f81q_.arc File Name: /tmp/arctmp/o1_mf_1_51_b2g3dm1s_.arc RMAN> RMAN> exit Recovery Manager complete. [oracle10g@testdb arctmp]$ [oracle10g@testdb arctmp]$ sqlplus "/ as sysdba" SQL*Plus: Release 10.2.0.5.0 - Production on Sun Sep 28 03:35:48 2014 Copyright (c) 1982, 2010, Oracle. All Rights Reserved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production With the Partitioning, Oracle Label Security, OLAP, Data Mining Scoring Engine and Real Application Testing options SQL> select SEQUENCE#,CREATOR from v$archived_log order by SEQUENCE# desc; SEQUENCE# CREATOR ---------- ------- 55 RMAN 55 ARCH 54 RMAN 54 ARCH 53 RMAN 53 ARCH 52 RMAN 52 ARCH 51 RMAN 51 ARCH 24 ARCH SEQUENCE# CREATOR ---------- ------- 23 ARCH 22 ARCH 21 ARCH 20 ARCH 19 ARCH 18 ARCH 17 ARCH 16 ARCH 15 ARCH 14 ARCH 13 ARCH SEQUENCE# CREATOR ---------- ------- 12 ARCH 11 ARCH 10 ARCH 9 ARCH 8 ARCH 7 ARCH 6 ARCH 5 FGRD 5 ARCH 4 ARCH 4 FGRD SEQUENCE# CREATOR ---------- ------- 3 ARCH 3 FGRD 2 ARCH 1 ARCH 37 rows selected. SQL> |