RAC Archive log写入错误的节点

2015-01-21 12:17:27 · 作者: · 浏览: 2

由于多个客户几次问到,RAC环境中,node2的归档日志,写入到node1的archive路径中。


这个问题导致一些客户在使用OGG的情况下,有时无法正确读取日志的问题。


那是什么原因导致的这个问题呢?


对此,进行查找和测试。发现了下面的情况会导致archive log没有记录到正确的节点位置。


测试环境


Linux + 11.2.0.4 RAC


node1


node2


ALTER SYSTEM SET log_archive_dest_1='location=/home/oracle/archive_log/ valid_for=(all_logfiles,all_roles)' sid='orcl2' scope=spfile;


情况1


在node2 instance关闭的情况下,node1上执行alter system archive log current;


会将node2的archive log写入到node1的路径


-----------10.2.0.5版本测试--------------


注:nascds14是节点1,nascds15是节点2



[oracle@nascds14 ~]$ ls -l /u01/app/database/dbs/
-rw-r----- 1 oracle oinstall 9897472 Dec? 1 09:47 arch1_66_827745338.dbf
-rw-r----- 1 oracle oinstall? ? 2048 Dec? 1 09:47 arch1_67_827745338.dbf
-rw-r----- 1 oracle oinstall? ? 1024 Dec? 1 09:50 arch1_68_827745338.dbf
[oracle@nascds14 ~]$ sqlplus / as sysdba
SQL>? alter system archive log current;
System altered.
[oracle@nascds14 ~]$ ls -l /u01/app/database/dbs/
-rw-r----- 1 oracle oinstall 9897472 Dec? 1 09:47 arch1_66_827745338.dbf
-rw-r----- 1 oracle oinstall? ? 2048 Dec? 1 09:47 arch1_67_827745338.dbf
-rw-r----- 1 oracle oinstall? ? 1024 Dec? 1 09:50 arch1_68_827745338.dbf
-rw-r----- 1 oracle oinstall? 11776 Dec? 1 09:55 arch1_69_827745338.dbf
-rw-r----- 1 oracle oinstall? 128512 Dec? 1 09:55 arch2_101_827745338.dbf? ? <<<<<<<<<<<<<[oracle@nascds14 ~]$ date
Mon Dec? 1 09:56:01 CST 2014
$ sqlplus / as sysdba
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - Production
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
[oracle@nascds15 ~]$ ls -l /u01/app/database/dbs/
-rw-r----- 1 oracle oinstall? ? 6144 Dec? 1 09:50 arch2_100_827745338.dbf
-rw-r----- 1 oracle oinstall 17412608 Dec? 1 09:46 arch2_98_827745338.dbf
-rw-r----- 1 oracle oinstall? ? 1536 Dec? 1 09:47 arch2_99_827745338.dbf
[oracle@nascds15 ~]$ ls -l /u01/app/database/dbs/
-rw-r----- 1 oracle oinstall? ? 6144 Dec? 1 09:50 arch2_100_827745338.dbf
-rw-r----- 1 oracle oinstall 17412608 Dec? 1 09:46 arch2_98_827745338.dbf
-rw-r----- 1 oracle oinstall? ? 1536 Dec? 1 09:47 arch2_99_827745338.dbf


-----------11.2.0.4版本测试--------------


node2 instance关闭,日志产生结果


在node2 instance关闭的情况下,node1上执行alter system archive log current;


同样会将node2的archive log写入到node1的路径


---node2---


SQL> create table test1 as select * from dba_users;


create table test1 as select * from dba_users;


SQL> shutdown abort


shutdown abort


ORACLE instance shut down.


---node1---


SQL> alter system archive log current;


---node1---


[oracle@node111g archive_log]$ ls -al 2*


-rw------- 1 oracle asmadmin 148992 12月 19 11:22 2_176_864642458.dbf


-rw------- 1 oracle asmadmin 1024 12月 19 11:22 2_177_864642458.dbf <<<<<<<<<<<<<

---node2---


[oracle@node211g archive_log]$ ls -ctrl


-rw------- 1 oracle asmadmin 1024 12月 19 10:44 2_173_864642458.dbf


-rw------- 1 oracle asmadmin 1872896 12月 19 11:18 2_174_864642458.dbf


-rw------- 1 oracle asmadmin 15360 12月 19 11:18 2_175_864642458.dbf


下面是测试结果截图,同时开启4个窗口


RAC Archive log写入错误的节点