Oracle+ASM單機環境下如何開啟歸檔

小編給大家分享一下Oracle+ASM單機環境下如何開啟歸檔，希望大家閱讀完這篇文章之后都有所收獲，下面讓我們一起去探討吧！

在ASM單機環境下，開啟歸檔的最簡單的方法。
環境：oracle11g  11.2.0.4

登陸sqlplus
[oracle@udevasm ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Thu Jun 8 18:20:41 2017

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

要把Oracle數據庫給啟動到Open狀態

SQL> startup
ORACLE instance started.

Total System Global Area 1068937216 bytes
Fixed Size            2260088 bytes
Variable Size          331350920 bytes
Database Buffers      729808896 bytes
Redo Buffers            5517312 bytes
Database mounted.
Database opened.

查看ASM空間使用率
SQL>  select group_number,name,total_mb,free_mb from v$asm_diskgroup;

GROUP_NUMBER NAME                  TOTAL_MB      FREE_MB
------------ ------------------------------ ---------- ----------
       1 DGDATA01                 22520          260
       2 DGDATA02                 20472        14132
       3 DGRECOVERY              21500        21420
       4 DGSYSTEM                 20472        20392
       5 GRID1                 10232        10144

查看歸檔狀態
SQL> archive log list;
Database log mode           No Archive Mode
Automatic archival           Disabled
Archive destination           /oracle/app/oracle/product/11.2.0/dbs/arch
Oldest online log sequence     9
Current log sequence           14

SQL> show user
USER is "SYS"

關庫，或使用命令：shutdown immediate來關閉
SQL> shutdown    immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

啟庫到mount
SQL> startup mount;
ORACLE instance started.

Total System Global Area 1068937216 bytes
Fixed Size            2260088 bytes
Variable Size          331350920 bytes
Database Buffers      729808896 bytes
Redo Buffers            5517312 bytes
Database mounted.

查看當前節點的狀態
SQL> select status from gv$instance;

STATUS
------------
MOUNTED

為節點開啟歸檔，開啟歸檔
SQL> alter database archivelog;

Database altered.

查看歸檔狀態，發現歸檔日志路徑不對，并不是默認的路徑在ASM中的路徑

SQL> archive log list;
Database log mode           Archive Mode
Automatic archival           Enabled
Archive destination           /oracle/app/oracle/product/11.2.0/dbs/arch
Oldest online log sequence     9
Next log sequence to archive   14
Current log sequence           14

修改歸檔路徑

SQL>  ALTER SYSTEM SET LOG_ARCHIVE_DEST_1='LOCATION=+DGRECOVERY/' SCOPE=SPFILE SID='udevasm'; 

查看當前修改后路徑

SQL> archive log list;
Database log mode           Archive Mode
Automatic archival           Enabled
Archive destination           +DGRECOVERY/arc
Oldest online log sequence     9
Next log sequence to archive   14
Current log sequence           14

節點啟庫
SQL> alter database open;

Database altered.

SQL> select status from v$instance;

STATUS
------------
OPEN

來看一下，歸檔路徑的信息，默認是直接指向了ASM中的路徑
SQL> show parameter log_archive_dest;

NAME                     TYPE     VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest             string
log_archive_dest_1             string     LOCATION=+DGRECOVERY/ARC
log_archive_dest_10             string
log_archive_dest_11             string
log_archive_dest_12             string
log_archive_dest_13             string
log_archive_dest_14             string
log_archive_dest_15             string
log_archive_dest_16             string
log_archive_dest_17             string
log_archive_dest_18             string

到ASM下看一下歸檔文件
ASMCMD> lsdg
State    Type    Rebal  Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name
MOUNTED  EXTERN  N         512   4096  4194304     22520      260                0             260              0             N  DGDATA01/
MOUNTED  EXTERN  N         512   4096  4194304     20472    14132                0           14132              0             N  DGDATA02/
MOUNTED  EXTERN  N         512   4096  4194304     21500    21420                0           21420              0             N  DGRECOVERY/
MOUNTED  EXTERN  N         512   4096  4194304     20472    20392                0           20392              0             N  DGSYSTEM/
MOUNTED  EXTERN  N         512   4096  4194304     10232    10144                0           10144              0             N  GRID1/

SMCMD> cd 2017_06_08/
ASMCMD> l
thread_1_seq_14.256.946154499
thread_1_seq_15.257.946154499
thread_1_seq_16.258.946154499
thread_1_seq_17.259.946154499
thread_1_seq_18.260.946154501
thread_1_seq_19.261.946154523
thread_1_seq_20.262.946154571

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