用rman恢复，current redo 日志损坏的情况
1、做全库备份
rman> run{
allocate channel c1 type disk maxpiecesize=500m;
backup current controlfile format '+dgasm/backup/haozg/ctl_%d_%s';
backup full database format '+dgasm/backup/haozg/db_%d_%s_%p_%t';
release channel c1;
}2> 3> 4> 5> 6>
released channel: ora_disk_1
allocated channel: c1
channel c1: sid=19 device type=disk
starting backup at 02-jul-12
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
including current control file in backup set
channel c1: starting piece 1 at 02-jul-12
channel c1: finished piece 1 at 02-jul-12
piece handle=+dgasm/backup/haozg/ctl_ora11_57 tag=tag20120702t110101 comment=none
channel c1: backup set complete, elapsed time: 00:00:03
finished backup at 02-jul-12
starting backup at 02-jul-12
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00001 name=+dgasm/ora11/datafile/system.257.785186755
input datafile file number=00002 name=+dgasm/ora11/datafile/sysaux.258.785186845
input datafile file number=00003 name=+dgasm/ora11/datafile/undotbs1.259.785186901
input datafile file number=00004 name=+dgasm/ora11/datafile/users.272.787487359
channel c1: starting piece 1 at 02-jul-12
channel c1: finished piece 1 at 02-jul-12
piece handle=+dgasm/backup/haozg/db_ora11_58_1_787575668 tag=tag20120702t110107 comment=none
channel c1: starting piece 2 at 02-jul-12
channel c1: finished piece 2 at 02-jul-12
piece handle=+dgasm/backup/haozg/db_ora11_58_2_787575668 tag=tag20120702t110107 comment=none
channel c1: backup set complete, elapsed time: 00:01:10
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
including current control file in backup set
including current spfile in backup set
channel c1: starting piece 1 at 02-jul-12
channel c1: finished piece 1 at 02-jul-12
piece handle=+dgasm/backup/haozg/db_ora11_59_1_787575738 tag=tag20120702t110107 comment=none
channel c1: backup set complete, elapsed time: 00:00:02
finished backup at 02-jul-12
released channel: c1
rman>
2、做操作，，让不同的操作分布在不同的归档日志文件中，并且检查日志情况和检查点情况
sql> select first_change#,next_change#,group#,sequence#,status from v$log;
first_change# next_change# group# sequence# status
------------- ------------ ---------- ---------- ----------------
999200 999353 1 7 inactive
999353 999426 2 8 inactive
999426 2.8147e+14 3 9 current
sql> create table test22(aab001 varchar(15),aab003 varchar(20));
table created.
sql> insert into test22 values ('soft','0001');
1 row created.
sql> /
1 row created.
sql> /
1 row created.
sql> commit;
commit complete.
sql> select * from test22;
aab001 aab003
--------------- --------------------
soft 0001
soft 0001
soft 0001
sql> alter system switch logfile;
system altered.
sql> select first_change#,next_change#,group#,sequence#,status from v$log;
first_change# next_change# group# sequence# status
------------- ------------ ---------- ---------- ----------------
1000076 2.8147e+14 1 10 current
999353 999426 2 8 inactive
999426 1000076 3 9 active
sql> create table test33(aab001 number,aab004 varchar2(19));
table created.
sql> insert into test33 values(1,'zhang');
1 row created.
sql> /.
1 row created.
sql> /
1 row created.
sql> commit;
commit complete.
sql> select * from test33;
aab001 aab004
---------- -------------------
1 zhang
1 zhang
1 zhang
sql> alter system switch logfile;
system altered.
sql> select first_change#,next_change#,group#,sequence#,status from v$log;
first_change# next_change# group# sequence# status
------------- ------------ ---------- ---------- ----------------
1000076 1000117 1 10 active
1000117 2.8147e+14 2 11 current
999426 1000076 3 9 active
sql> create table c_test(aac001 varchar2(10),name varchar2(13));
table created.
sql> insert into c_test values('1392027','haozg');
1 row created.
sql> /
1 row created.
sql> /.
1 row created.
sql> /
1 row created.
sql> commit;
commit complete.
sql> select * from c_test;
aac001 name
---------- -------------
1392027 haozg
1392027 haozg
1392027 haozg
1392027 haozg
sql> select first_change#,next_change#,group#,sequence#,status from v$log;
first_change# next_change# group# sequence# status
------------- ------------ ---------- ---------- ----------------
1000076 1000117 1 10 active
1000117 2.8147e+14 2 11 current
999426 1000076 3 9 active
3、shutdown abort
sql> shutdown abort;
oracle instance shut down.