数据库文件的迁移
公众号：杨建荣的学习笔记 · 作者：笔记21天 · 发布：2014-03-24 08:34:57 · 原文链接
关于数据库中的文件迁移，需要考虑普通数据文件，redo日志文件（还需要考虑是否为current状态），undo表空间，临时表空间，system,sysaux表空间。
文件迁移可以参考下面的伪代码:
move_non_system_tablespace ，需要在open状态
{
alter tablespace xxxx offline;
cp datafiles
alter tablespace xxx rename sourcexxxxx to targetxxxxx;
alter tablespace xxxxx online;
}
move_system_tablespace(system,sysaux,undo),需要在mount状态
{
cp datafiles
alter database rename file sourcexxxxx to targetxxxxx;
alter database open;
}
move_redo_logs
{
1. for current/active logfiles, need to in mount state
cp logfiles
alter database rename file sourcexxxxx to targetxxxxx;
2. for inactive/unused logfiles,can change online
cp logfiles
alter database rename file sourcexxxxx to targetxxxxx;
}
move_temp_files
{
cp datafiles
alter database rename file sourcexxxxx to targetxxxxx;
alter database tempfile xxxx online;
}
示例脚本如下：
##### normal tablespace ####
alter tablespace TEST_DATA offline;
!cp ‘/oravl08/oradata/TESTDB/TEST_DATA_1.dbf’ ‘/oravl01/oracle/TEST_DATA_1.dbf’;
alter tablespace TEST_DATA rename datafile ‘/oravl08/oradata/TESTDB/TEST_DATA_1.dbf’ to ‘/oravl01/oracle/TEST_DATA_1.dbf’;
alter tablespace TEST_DATA online;
alter tablespace TEST_IX offline;
!cp ‘/oravl08/oradata/TESTDB/TEST_IX_1.dbf’ ‘/oravl01/oracle/TEST_IX_1.dbf’;
alter tablespace TEST_IX rename datafile ‘/oravl08/oradata/TESTDB/TEST_IX_1.dbf’ to ‘/oravl01/oracle/TEST_IX_1.dbf’;
alter tablespace TEST_IX online;
##### temp files ####
alter database tempfile ‘/oravl08/oradata/TESTDB/TEMP_1.dbf’ offline;
!cp ‘/oravl08/oradata/TESTDB/TEMP_1.dbf’ ‘/oravl01/oracle/TEMP_1.dbf’
alter database rename file ‘/oravl08/oradata/TESTDB/TEMP_1.dbf’ to ‘/oravl01/oracle/TEMP_1.dbf’;
alter database tempfile ‘/oravl01/oracle/TEMP_1.dbf’ online;
#### system,sysaux,undo ####
!cp ‘/oravl08/oradata/TESTDB/SYSTEM_1.dbf’ ‘/oravl01/oracle/SYSTEM_1.dbf’
alter database rename file ‘/oravl08/oradata/TESTDB/SYSTEM_1.dbf’ to ‘/oravl01/oracle/SYSTEM_1.dbf’;
!cp ‘/oravl08/oradata/TESTDB/SYSAUX_1.dbf’ ‘/oravl01/oracle/SYSAUX_1.dbf’
alter database rename file ‘/oravl08/oradata/TESTDB/SYSAUX_1.dbf’ to ‘/oravl01/oracle/SYSAUX_1.dbf’;
!cp ‘/oravl08/oradata/TESTDB/UNDOTBS_1.dbf’ ‘/oravl01/oracle/UNDOTBS_1.dbf’
alter database rename file ‘/oravl08/oradata/TESTDB/UNDOTBS_1.dbf’ to ‘/oravl01/oracle/UNDOTBS_1.dbf’;
#### logfiles ####
!cp ‘/oravl03/oradata/TESTDB/redo_g1_m1.dbf’ ‘/oravl01/oracle/redo_g1_m1.dbf’
alter database rename file ‘/oravl03/oradata/TESTDB/redo_g1_m1.dbf’ to ‘/oravl01/oracle/redo_g1_m1.dbf’;
!cp ‘/oravl03/oradata/TESTDB/redo_g1_m2.dbf’ ‘/oravl01/oracle/redo_g1_m2.dbf’
alter database rename file ‘/oravl03/oradata/TESTDB/redo_g1_m2.dbf’ to ‘/oravl01/oracle/redo_g1_m2.dbf’;
最后带给大家一些福利，关于文件的迁移，可以参考如下的脚本。
if [[ -d $1 ]]; then
echo ‘Directory has found :)’
else
echo “Directory doesn’t exists! :(“
exit
fi
#used for 11g
#select regexp_count(file_name,’/’) from dba_data_files
#used for 10g,9i..
#select (length(file_name)-length(replace(file_name,’/’,null)))/(length(‘/’)) from dba_data_files
#get file_name
# select substr(file_name,instr(file_name,’/’,1,regexp_count(file_name,’/’))) from dba_data_files;
sqlplus -s / as sysdba <<EOF
set linesize 200
set pages 0
prompt ########## Scripts as below #######
select ‘DB is now in ‘||status||’ status’ from gv\$instance;
select
‘alter tablespace ‘||tablespace_name||’ offline; ‘||chr(10)
||’!cp ‘||chr(39)||file_name||chr(39)||’ ‘ ||chr(39)||’$1’||substr(file_name,instr(file_name,’/’,1,regexp_count(file_name,’/’)))||chr(39)||’; ‘||chr(10)
||’alter tablespace ‘||tablespace_name||’ rename datafile ‘||chr(39)||file_name||chr(39)||’ to ‘||chr(39)||’$1’||substr(file_name,instr(file_name,’/’,1,regexp_count(file_name,’/’)))||chr(39)||’; ‘||chr(10)
|| ‘alter tablespace ‘||tablespace_name||’ online; ‘
from dba_data_files where tablespace_name not in (‘SYSTEM’,’SYSAUX’) and tablespace_name not like ‘UNDO%’;
prompt ##### temp files ####
select ‘alter database tempfile ‘||chr(39)||name||chr(39)||’ offline;’||chr(10)
||’!cp ‘||chr(39)||name||chr(39)||’ ‘ ||chr(39)||’$1’||substr(name,instr(name,’/’,1,regexp_count(name,’/’)))||chr(39)||’ ‘||chr(10)
||’alter database rename file ‘||chr(39)||name||chr(39)||’ to ‘||chr(39)||’$1’||substr(name,instr(name,’/’,1,regexp_count(name,’/’)))||chr(39)||’; ‘||chr(10)
|| ‘alter database tempfile ‘||chr(39)||’$1’||substr(name,instr(name,’/’,1,regexp_count(name,’/’)))||chr(39)||’ online; ‘
from v\$tempfile;
prompt #### system,sysaux,undo ####
select
‘!cp ‘||chr(39)||f.name||chr(39)||’ ‘ ||chr(39)||’$1’||substr(f.name,instr(f.name,’/’,1,regexp_count(f.name,’/’)))||chr(39)||’ ‘||chr(10)
||’alter database rename file ‘||chr(39)||f.name||chr(39)||’ to ‘||chr(39)||’$1’||substr(f.name,instr(f.name,’/’,1,regexp_count(f.name,’/’)))||chr(39)||’; ‘
from v\$datafile f,v\$tablespace t where t.ts#=f.ts# and (t.name in (‘SYSTEM’,’SYSAUX’) or t.name like ‘UNDO%’);
prompt #### logfiles ####
select
‘!cp ‘||chr(39)||member||chr(39)||’ ‘ ||chr(39)||’$1’||substr(member ,instr(member ,’/’,1,regexp_count(member ,’/’)))||chr(39)||’ ‘||chr(10)
||’alter database rename file ‘||chr(39)||member ||chr(39)||’ to ‘||chr(39)||’$1’||substr(member ,instr(member ,’/’,1,regexp_count(member ,’/’)))||chr(39)||’; ‘
from v\$logfile f,v\$log l where f.group#=l.group# and l.status!=’CURRENT’;
EOF
exit