Stripe data files across multiple physical devices and locations
来源：互联网 发布：xampp数据库配置文件 编辑：程序博客网 时间：2024/06/05 16:07
Stripe data files across multiple physical devices and locations
如果在没有做条带的磁盘(即从存储到OS没有做raid)，那么就需要手工去做I/O的分布。切记，不应该将频繁使用的table和其index分开，这样会正大I/O；
针对tables、indexes、temp tablespace，首先调优SQL，其次如果真心无法再调优SQL，再想办法分离高I/O的数据文件。
考虑归档日志、redo log不要和数据文件放在同一磁盘上，避免lgwr和arcn两大进程造成I/O导致访问数据文件慢
1、条带化redo日志
查看当前redo的位置，及三组的成员
SQL> col member for a55;
SQL> set linesize 120;
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE CURRENT 100
1 /u01/app/oracle/oradata/redologfile/redo01b.log ONLINE CURRENT 100
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
添加group 4，然后切换日志，重建1、2、3三个组
SQL> alter database add logfile group 4 ('/u01/app/oracle/oradata/redologfile/redo04a.log','/u03/app/oracle/oradata/redologfile/redo04b.log') size 200m;
Database altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE CURRENT 100
1 /u01/app/oracle/oradata/redologfile/redo01b.log ONLINE CURRENT 100
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE UNUSED 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE UNUSED 200
SQL> alter system switch logfile;
System altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE ACTIVE 100
1 /u01/app/oracle/oradata/redologfile/redo01b.log ONLINE ACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
SQL> alter system checkpoint;
System altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE INACTIVE 100
1 /u01/app/oracle/oradata/redologfile/redo01b.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
SQL> alter database drop logfile group 1;
Database altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
如果不用reuse则会出现下面的错误，虽然是drop了，从试图里也查不到了，我们删除时字典里的信息，实际的文件还是存在的
SQL> alter database add logfile group 1 ('/u01/app/oracle/oradata/redologfile/redo01a.log','/u03/app/oracle/oradata/redologfile/redo01b.log') size 200m;
alter database add logfile group 1 ('/u01/app/oracle/oradata/redologfile/redo01a.log','/u03/app/oracle/oradata/redologfile/redo01b.log') size 200m
*
ERROR at line 1:
ORA-00301: error in adding log file '/u01/app/oracle/oradata/redologfile/redo01a.log' - file cannot be created
ORA-27038: created file already exists
Additional information: 1
SQL> alter database add logfile group 1 ('/u01/app/oracle/oradata/redologfile/redo01a.log','/u03/app/oracle/oradata/redologfile/redo01b.log') size 200m reuse;
Database altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE UNUSED 200
1 /u03/app/oracle/oradata/redologfile/redo01b.log ONLINE UNUSED 200
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
SQL> alter database drop logfile group 2;
Database altered.
SQL> alter database add logfile group 2 ('/u01/app/oracle/oradata/redologfile/redo02a.log','/u03/app/oracle/oradata/redologfile/redo02b.log') size 200m reuse;
Database altered.
SQL> alter database drop logfile group 3;
Database altered.
SQL> alter database add logfile group 3 ('/u01/app/oracle/oradata/redologfile/redo03a.log','/u03/app/oracle/oradata/redologfile/redo03b.log') size 200m reuse;
Database altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE UNUSED 200
1 /u03/app/oracle/oradata/redologfile/redo01b.log ONLINE UNUSED 200
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE UNUSED 200
2 /u03/app/oracle/oradata/redologfile/redo02b.log ONLINE UNUSED 200
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE UNUSED 200
3 /u03/app/oracle/oradata/redologfile/redo03b.log ONLINE UNUSED 200
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
SQL> alter system switch logfile;
System altered.
SQL> alter system checkpoint;
System altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE CURRENT 200
1 /u03/app/oracle/oradata/redologfile/redo01b.log ONLINE CURRENT 200
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE UNUSED 200
2 /u03/app/oracle/oradata/redologfile/redo02b.log ONLINE UNUSED 200
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE UNUSED 200
3 /u03/app/oracle/oradata/redologfile/redo03b.log ONLINE UNUSED 200
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE INACTIVE 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE INACTIVE 200
SQL> alter database drop logfile group 4;
Database altered.
多切几次日志的切换
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE INACTIVE 200
1 /u03/app/oracle/oradata/redologfile/redo01b.log ONLINE INACTIVE 200
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE CURRENT 200
2 /u03/app/oracle/oradata/redologfile/redo02b.log ONLINE CURRENT 200
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 200
3 /u03/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 200
[oracle@vm010148 redologfile]$ ll
总计 820032
-rw-r----- 1 oracle oinstall 209715712 09-12 09:06 redo01b.log
-rw-r----- 1 oracle oinstall 209715712 09-12 09:06 redo02b.log
-rw-r----- 1 oracle oinstall 209715712 09-12 09:06 redo03b.log
-rw-r----- 1 oracle oinstall 209715712 09-12 09:02 redo04b.log==>虽然做了删除动作，实际的物理文件还是存在的
2、条带化 数据文件的话，可以再增加数据文件，可以用DBMS_FILE_TRANSFER来做已经的数据文件位置的变动，新添加文件的位置可以用
ALTER TABLESPACE SYSTEM ADD DATAFILE '/u01/app/oracle/oradata/datafile/system.dbf' SIZE 400M;
3、条带化归档日志
You can choose to archive redo logs to a single destination or to multiple destinations. Destinations can be local—within the local file system or an Oracle Automatic Storage Management (Oracle ASM) disk group—or remote (on a standby database). When you archive to multiple destinations, a copy of each filled redo log file is written to each destination. These redundant copies help ensure that archived logs are always available in the event of a failure at one of the destinations.
上面的这句话可以看出，所谓条带化归档，只是冗余了redo file copy，压根，没有想象的那样打散日志文件放在多处
alter system set log_archive_dest_1='location=/u01/app/oracle/oradata/archivelogfile/ORCL11G/archivelog/ORCL11G/archivelog' scope=both;
alter system set log_archive_dest_2='location=/u03/app/oracle/oradata/archivelog' scope=both;
SQL> SET LINESIZE 120;
SQL>COL NAME FOR A120;
SQL> SELECT NAME FROM V$ARCHIVED_LOG WHERE NAME IS NOT NULL ORDER BY COMPLETION_TIME;
NAME
------------------------------------------------------------------------------------------------------------------------
/u01/app/oracle/oradata/archivelogfile/ORCL11G/archivelog/ORCL11G/archivelog/1_240_855936488.dbf
/u03/app/oracle/oradata/archivelog/1_240_855936488.dbf
/u01/app/oracle/oradata/archivelogfile/ORCL11G/archivelog/ORCL11G/archivelog/1_241_855936488.dbf
/u03/app/oracle/oradata/archivelog/1_241_855936488.dbf
关于怎么讲归档日志同步到remote 数据库服务器，将在dg上总结说明
如果在没有做条带的磁盘(即从存储到OS没有做raid)，那么就需要手工去做I/O的分布。切记，不应该将频繁使用的table和其index分开，这样会正大I/O；
针对tables、indexes、temp tablespace，首先调优SQL，其次如果真心无法再调优SQL，再想办法分离高I/O的数据文件。
考虑归档日志、redo log不要和数据文件放在同一磁盘上，避免lgwr和arcn两大进程造成I/O导致访问数据文件慢
1、条带化redo日志
查看当前redo的位置，及三组的成员
SQL> col member for a55;
SQL> set linesize 120;
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE CURRENT 100
1 /u01/app/oracle/oradata/redologfile/redo01b.log ONLINE CURRENT 100
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
添加group 4，然后切换日志，重建1、2、3三个组
SQL> alter database add logfile group 4 ('/u01/app/oracle/oradata/redologfile/redo04a.log','/u03/app/oracle/oradata/redologfile/redo04b.log') size 200m;
Database altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE CURRENT 100
1 /u01/app/oracle/oradata/redologfile/redo01b.log ONLINE CURRENT 100
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE UNUSED 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE UNUSED 200
SQL> alter system switch logfile;
System altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE ACTIVE 100
1 /u01/app/oracle/oradata/redologfile/redo01b.log ONLINE ACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
SQL> alter system checkpoint;
System altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE INACTIVE 100
1 /u01/app/oracle/oradata/redologfile/redo01b.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
SQL> alter database drop logfile group 1;
Database altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
如果不用reuse则会出现下面的错误，虽然是drop了，从试图里也查不到了，我们删除时字典里的信息，实际的文件还是存在的
SQL> alter database add logfile group 1 ('/u01/app/oracle/oradata/redologfile/redo01a.log','/u03/app/oracle/oradata/redologfile/redo01b.log') size 200m;
alter database add logfile group 1 ('/u01/app/oracle/oradata/redologfile/redo01a.log','/u03/app/oracle/oradata/redologfile/redo01b.log') size 200m
*
ERROR at line 1:
ORA-00301: error in adding log file '/u01/app/oracle/oradata/redologfile/redo01a.log' - file cannot be created
ORA-27038: created file already exists
Additional information: 1
SQL> alter database add logfile group 1 ('/u01/app/oracle/oradata/redologfile/redo01a.log','/u03/app/oracle/oradata/redologfile/redo01b.log') size 200m reuse;
Database altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE UNUSED 200
1 /u03/app/oracle/oradata/redologfile/redo01b.log ONLINE UNUSED 200
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE INACTIVE 100
2 /u01/app/oracle/oradata/redologfile/redo02b.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 100
3 /u01/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 100
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
SQL> alter database drop logfile group 2;
Database altered.
SQL> alter database add logfile group 2 ('/u01/app/oracle/oradata/redologfile/redo02a.log','/u03/app/oracle/oradata/redologfile/redo02b.log') size 200m reuse;
Database altered.
SQL> alter database drop logfile group 3;
Database altered.
SQL> alter database add logfile group 3 ('/u01/app/oracle/oradata/redologfile/redo03a.log','/u03/app/oracle/oradata/redologfile/redo03b.log') size 200m reuse;
Database altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE UNUSED 200
1 /u03/app/oracle/oradata/redologfile/redo01b.log ONLINE UNUSED 200
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE UNUSED 200
2 /u03/app/oracle/oradata/redologfile/redo02b.log ONLINE UNUSED 200
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE UNUSED 200
3 /u03/app/oracle/oradata/redologfile/redo03b.log ONLINE UNUSED 200
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE CURRENT 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE CURRENT 200
SQL> alter system switch logfile;
System altered.
SQL> alter system checkpoint;
System altered.
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE CURRENT 200
1 /u03/app/oracle/oradata/redologfile/redo01b.log ONLINE CURRENT 200
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE UNUSED 200
2 /u03/app/oracle/oradata/redologfile/redo02b.log ONLINE UNUSED 200
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE UNUSED 200
3 /u03/app/oracle/oradata/redologfile/redo03b.log ONLINE UNUSED 200
4 /u01/app/oracle/oradata/redologfile/redo04a.log ONLINE INACTIVE 200
4 /u03/app/oracle/oradata/redologfile/redo04b.log ONLINE INACTIVE 200
SQL> alter database drop logfile group 4;
Database altered.
多切几次日志的切换
SQL> select f.group#,f.member,f.type,l.status,l.bytes/1024/1024 mb from v$log l, v$logfile f where f.group#=l.group#;
GROUP# MEMBER TYPE STATUS MB
---------- ------------------------------------------------------- ------- ---------------- ----------
1 /u01/app/oracle/oradata/redologfile/redo01a.log ONLINE INACTIVE 200
1 /u03/app/oracle/oradata/redologfile/redo01b.log ONLINE INACTIVE 200
2 /u01/app/oracle/oradata/redologfile/redo02a.log ONLINE CURRENT 200
2 /u03/app/oracle/oradata/redologfile/redo02b.log ONLINE CURRENT 200
3 /u01/app/oracle/oradata/redologfile/redo03a.log ONLINE INACTIVE 200
3 /u03/app/oracle/oradata/redologfile/redo03b.log ONLINE INACTIVE 200
[oracle@vm010148 redologfile]$ ll
总计 820032
-rw-r----- 1 oracle oinstall 209715712 09-12 09:06 redo01b.log
-rw-r----- 1 oracle oinstall 209715712 09-12 09:06 redo02b.log
-rw-r----- 1 oracle oinstall 209715712 09-12 09:06 redo03b.log
-rw-r----- 1 oracle oinstall 209715712 09-12 09:02 redo04b.log==>虽然做了删除动作，实际的物理文件还是存在的
2、条带化 数据文件的话，可以再增加数据文件，可以用DBMS_FILE_TRANSFER来做已经的数据文件位置的变动，新添加文件的位置可以用
ALTER TABLESPACE SYSTEM ADD DATAFILE '/u01/app/oracle/oradata/datafile/system.dbf' SIZE 400M;
3、条带化归档日志
You can choose to archive redo logs to a single destination or to multiple destinations. Destinations can be local—within the local file system or an Oracle Automatic Storage Management (Oracle ASM) disk group—or remote (on a standby database). When you archive to multiple destinations, a copy of each filled redo log file is written to each destination. These redundant copies help ensure that archived logs are always available in the event of a failure at one of the destinations.
上面的这句话可以看出，所谓条带化归档，只是冗余了redo file copy，压根，没有想象的那样打散日志文件放在多处
alter system set log_archive_dest_1='location=/u01/app/oracle/oradata/archivelogfile/ORCL11G/archivelog/ORCL11G/archivelog' scope=both;
alter system set log_archive_dest_2='location=/u03/app/oracle/oradata/archivelog' scope=both;
SQL> SET LINESIZE 120;
SQL>COL NAME FOR A120;
SQL> SELECT NAME FROM V$ARCHIVED_LOG WHERE NAME IS NOT NULL ORDER BY COMPLETION_TIME;
NAME
------------------------------------------------------------------------------------------------------------------------
/u01/app/oracle/oradata/archivelogfile/ORCL11G/archivelog/ORCL11G/archivelog/1_240_855936488.dbf
/u03/app/oracle/oradata/archivelog/1_240_855936488.dbf
/u01/app/oracle/oradata/archivelogfile/ORCL11G/archivelog/ORCL11G/archivelog/1_241_855936488.dbf
/u03/app/oracle/oradata/archivelog/1_241_855936488.dbf
关于怎么讲归档日志同步到remote 数据库服务器，将在dg上总结说明
0 0
- Stripe data files across multiple physical devices and locations
- Supporting Multiple iOS Versions and Devices
- ADF Single/Multiple files uploading and downloading
- JVMs across data center and twitter's jdk
- Oracle Physical Inventory Adjustment Process and Data flow.
- chapter 12 Data Files and Persistence
- 6-System Data Files and Information
- adb-with-multiple-devices
- Vim 101: Search and Replace on Multiple Files
- Creating INF Files for Multiple Platforms and Operating Systems
- ADF Single/Multiple files uploading and downloading 在
- Defining Shared Locations for Project Files
- Run monitoring physical devices on devstack
- Android: persist instance state across multiple sessions
- Data Files
- How to setup multiple data sources with Spring and JPA
- How to setup multiple data sources with Spring and JPA
- AjaxControlToolkit Multiple Files Upload
- OData SugarCRM插件末期总结
- Aspose.Words生成word文件
- 苹果开发邮件联系大全
- 破解Mac OS X 管理员密码
- Android APK 签名比对
- Stripe data files across multiple physical devices and locations
- link安装activiti designer
- ruby 运算符
- AngularJS入门（七）
- Python中正则表达式对中文的匹配问题
- JQuery上传插件Uploadify使用详解及错误处理
- 让WordPress使用Redis缓存来进行加快
- linux下tomcat服务的相关命令
- 这个暑假结束了却再没有了开学
