分类目录归档：Oracle

Oracle误删除数据文件恢复

发表于 2024 年 2 月 20 日 由 惜分飞

有客户通过sftp误删除oracle数据文件,咨询我们是否可以恢复,通过远程上去检查,发现运气不错,数据库还没有crash,通过句柄找到被删除文件

oracle@cwgstestdb[testwctdb]/proc/20611/fd$ls -ltr
total 0
lr-x------ 1 oracle oinstall 64 Feb 20 14:03 9 -> /oracle/db19c/rdbms/mesg/oraus.msb
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 8 -> /oracle/db19c/dbs/lkTESTWCTDB
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 7 -> /oracle/db19c/dbs/hc_testwctdb.dat
lr-x------ 1 oracle oinstall 64 Feb 20 14:03 6 -> /var/lib/sss/mc/passwd
lr-x------ 1 oracle oinstall 64 Feb 20 14:03 5 -> /proc/20611/fd
lr-x------ 1 oracle oinstall 64 Feb 20 14:03 4 -> /oracle/db19c/rdbms/mesg/oraus.msb
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 305 -> /oradata/ftms_zx_test01_data8.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 304 -> /oradata/ftms_zx_test01_data7.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 303 -> /oradata/ftms_zx_test01_data6.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 302 -> '/oradata/ftms_zx_test01_data5.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 301 -> '/oradata/ftms_zx_test01_data4.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 300 -> '/oradata/ftms_zx_test01_data3.dbf (deleted)'
lr-x------ 1 oracle oinstall 64 Feb 20 14:03 3 -> /dev/null
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 299 -> '/oradata/ftms_zx_test01_data2.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 298 -> '/oradata/ftms_zx_test01_data1.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 297 -> '/oradata/ftms_zx_test01_data.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 296 -> /oradata/ftms_zx_test_data.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 295 -> '/oradata/TESTWCTDB/sd.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 294 -> /oradata/TESTWCTDB/ftms_cs3_jiamiceshi
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 293 -> /langchao/dumpdata/FTMS_CS_TDE.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 292 -> /oradata/ftms_zx_test01.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 291 -> /langchao/dumpdata/FTMS_CS_DATA4.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 290 -> '/oradata/ftms_zx_data5.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 289 -> /langchao/dumpdata/FTMS_CS_DATA3.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 288 -> /langchao/dumpdata/FTMS_CS_DATA2.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 287 -> /langchao/dumpdata/FTMS_JD_DATA2.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 286 -> '/oradata/LCBIPECDS _TEMP_DAT.DBF'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 285 -> '/oradata/rTB_MBFE_TEMP (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 284 -> '/oradata/TESTWCTDB/temp01.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 283 -> '/oradata/ftms_credit_data5.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 282 -> /oradata/ftmshtdata.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 281 -> '/oradata/dump_data/FTMS_CSBF_DATA.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 280 -> /langchao/dumpdata/FTMS_NEWBL2_DATA.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 279 -> /langchao/dumpdata/FTMS_CS_DATA.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 278 -> /oradata/LCBIPECDS_DAT.DBF
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 277 -> /oradata/rTB_MBFE
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 276 -> /oradata/udpcount_02.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 275 -> /oradata/udpcount_01.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 274 -> '/oradata/ftms_credit_data_6.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 273 -> /langchao/dumpdata/FTMS_JD_DATA.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 272 -> '/oradata/ftms_old.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 271 -> '/oradata/ftms_credit_data2.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 270 -> /langchao/dumpdata/PJDIP_DATA.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 269 -> '/oradata/ftms_credit_data.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 268 -> /langchao/dumpdata/FTMS_NEWBL_DATA.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 267 -> '/oradata/ftms_zx_data4.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 266 -> /langchao/dumpdata/QIANZHANG_DATA.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 265 -> '/oradata/ftms_zx_data3.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 264 -> '/oradata/ftms_zx_data2.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 263 -> '/oradata/ftms_zx_data.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 262 -> /langchao/dumpdata/FTMSDIP_DATA.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 261 -> /oradata/TESTWCTDB/users01.dbf
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 260 -> '/oradata/TESTWCTDB/undotbs01.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 259 -> '/oradata/TESTWCTDB/sysaux01.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 258 -> '/oradata/TESTWCTDB/system01.dbf (deleted)'
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 257 -> /oradata/TESTWCTDB/control02.ctl
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 256 -> /oradata/TESTWCTDB/control01.ctl
l-wx------ 1 oracle oinstall 64 Feb 20 14:03 2 -> /dev/null
lrwx------ 1 oracle oinstall 64 Feb 20 14:03 10 -> 'socket:[823411]'
l-wx------ 1 oracle oinstall 64 Feb 20 14:03 1 -> /dev/null
lr-x------ 1 oracle oinstall 64 Feb 20 14:03 0 -> /dev/null

查询数据文件大小（被删除的文件文件大小通过v$datafile查询为0）

SQL> select name,bytes/1024/1024/1024 from v$datafile;

NAME                                                                             BYTES/1024/1024/1024
-------------------------------------------------------------------------------- --------------------
/oradata/TESTWCTDB/system01.dbf                                                                     0
/oradata/TESTWCTDB/sysaux01.dbf                                                                     0
/oradata/TESTWCTDB/undotbs01.dbf                                                                    0
/oradata/TESTWCTDB/users01.dbf                                                             .004882813
/langchao/dumpdata/FTMSDIP_DATA.dbf                                                                 3
/oradata/ftms_zx_data.dbf                                                                           0
/oradata/ftms_zx_data2.dbf                                                                          0
/oradata/ftms_zx_data3.dbf                                                                          0
/langchao/dumpdata/QIANZHANG_DATA.dbf                                                               5
/oradata/ftms_zx_data4.dbf                                                                          0
/langchao/dumpdata/FTMS_NEWBL_DATA.dbf                                                             30
/oradata/ftms_credit_data.dbf                                                                       0
/langchao/dumpdata/PJDIP_DATA.dbf                                                                  20
/oradata/ftms_credit_data2.dbf                                                                      0
/oradata/ftms_old.dbf                                                                               0
/langchao/dumpdata/FTMS_JD_DATA.dbf                                                                15
/oradata/ftms_credit_data_6.dbf                                                                     0
/oradata/udpcount_01.dbf                                                                            5
/oradata/udpcount_02.dbf                                                                            5
/oradata/rTB_MBFE                                                                              .03125
/oradata/LCBIPECDS_DAT.DBF                                                                         .5
/langchao/dumpdata/FTMS_CS_DATA.dbf                                                                30
/langchao/dumpdata/FTMS_NEWBL2_DATA.dbf                                                            30
/oradata/dump_data/FTMS_CSBF_DATA.dbf                                                               0
/oradata/ftmshtdata.dbf                                                                    .087890625
/oradata/ftms_credit_data5.dbf                                                                      0
/langchao/dumpdata/FTMS_JD_DATA2.dbf                                                                3
/langchao/dumpdata/FTMS_CS_DATA2.dbf                                                       31.9999847
/langchao/dumpdata/FTMS_CS_DATA3.dbf                                                               10
/oradata/ftms_zx_data5.dbf                                                                          0
/langchao/dumpdata/FTMS_CS_DATA4.dbf                                                        12.109375
/oradata/ftms_zx_test01.dbf                                                                19.0527344
/langchao/dumpdata/FTMS_CS_TDE.dbf                                                                  1
/oradata/TESTWCTDB/ftms_cs3_jiamiceshi                                                     .029296875
/oradata/TESTWCTDB/sd.dbf                                                                           0
/oradata/ftms_zx_test_data.dbf                                                             .009765625
/oradata/ftms_zx_test01_data.dbf                                                                    0
/oradata/ftms_zx_test01_data1.dbf                                                                   0
/oradata/ftms_zx_test01_data2.dbf                                                                   0
/oradata/ftms_zx_test01_data3.dbf                                                                   0
/oradata/ftms_zx_test01_data4.dbf                                                                   0
/oradata/ftms_zx_test01_data5.dbf                                                                   0
/oradata/ftms_zx_test01_data6.dbf                                                          12.5976563
/oradata/ftms_zx_test01_data7.dbf                                                          9.08203125
/oradata/ftms_zx_test01_data8.dbf                                                                6.25

45 rows selected.

把数据文件拷贝回来

cp /proc/20611/fd/302   /langchao/orabak/
cp /proc/20611/fd/301   /langchao/orabak/
cp /proc/20611/fd/300   /langchao/orabak/
cp /proc/20611/fd/299   /langchao/orabak/
cp /proc/20611/fd/298   /langchao/orabak/
cp /proc/20611/fd/297   /langchao/orabak/
cp /proc/20611/fd/295   /langchao/orabak/
cp /proc/20611/fd/290   /langchao/orabak/
cp /proc/20611/fd/285   /langchao/orabak/
cp /proc/20611/fd/284   /langchao/orabak/
cp /proc/20611/fd/283   /langchao/orabak/
cp /proc/20611/fd/281   /langchao/orabak/
cp /proc/20611/fd/274   /langchao/orabak/
cp /proc/20611/fd/272   /langchao/orabak/
cp /proc/20611/fd/271   /langchao/orabak/
cp /proc/20611/fd/269   /langchao/orabak/
cp /proc/20611/fd/267   /langchao/orabak/
cp /proc/20611/fd/265   /langchao/orabak/
cp /proc/20611/fd/264   /langchao/orabak/
cp /proc/20611/fd/263   /langchao/orabak/
cp /proc/20611/fd/260   /langchao/orabak/
cp /proc/20611/fd/259   /langchao/orabak/
cp /proc/20611/fd/258   /langchao/orabak/

由于涉及system表空间数据文件被删除,无法在open情况下直接操作,直接关闭数据库,启动到mount状态,重命名数据文件路径,recover数据文件,open库,恢复完成
参考以前类似恢复:
Solaris rm datafile recovery—利用句柄误删除数据文件恢复
如果数据库已经关闭,需要考虑以下类似恢复方式:
dbca删除库和rm删库恢复
记录一次rm -rf 删除数据文件异常恢复

发表在 Linux, Oracle备份恢复 | 标签为 , , , | 评论关闭

Oracle 19C 备库DML重定向—DML Redirection

发表于 2024 年 2 月 12 日 由 惜分飞

在19c之前，oracle Data Guard备用数据库上不能执行DML操作，但是，从19c开始备库就可以进行DML操作了；Active Data Guard备用数据库上运行DML操作，可以在备用数据库上运行只读应用程序，偶尔执行DML（太频繁影响主库性能），备库上的DML操作可以透明地重定向到主数据库并在主数据库上运行。也包括PL/SQL块中的DML语句。Active Data Guard会话将等待，直到将相应的更改发送到Active Data Guard备用数据库并将其应用于Active Data Guard备用数据库为止。在DML操作期间将保持读取一致性，并且运行DML的备用数据库可以查看其未提交的更改。但是，所有其他备用数据库实例只有在提交事务后才能查看这些更改。
在主库上创建测试表

SQL> select * from v$version;

BANNER
--------------------------------------------------------------------------------
BANNER_FULL
--------------------------------------------------------------------------------
BANNER_LEGACY
--------------------------------------------------------------------------------
    CON_ID
----------
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.5.0.0.0
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
	 0


SQL> select database_role ,open_mode from v$database;

DATABASE_ROLE	 OPEN_MODE
---------------- --------------------
PRIMARY 	 READ WRITE

SQL> create table system.t_xff as select * from dba_objects;

Table created.

SQL> select count(*) from system.t_xff;

  COUNT(*)
----------
     72407

在备库上进行dml操作

SQL> select database_role ,open_mode from v$database;

DATABASE_ROLE	 OPEN_MODE
---------------- --------------------
PHYSICAL STANDBY READ ONLY WITH APPLY



SQL> select count(*) from system.t_xff;

  COUNT(*)
----------
     72407

SQL> alter session enable adg_redirect_dml;

Session altered.

SQL> delete from system.t_xff;

72407 rows deleted.

SQL> commit;

Commit complete.

在主库上验证备库dml操作结果

SQL> select count(*) from system.t_xff;

  COUNT(*)
----------
	 0

SQL>

在18c中可以通过_enable_proxy_adg_redirect隐含参数实现dml重定向

发表在 Data Guard | 标签为 , , | 评论关闭

ORA-01595/ORA-600 4194处理

发表于 2024 年 2 月 5 日 由 惜分飞

又一个客户由于服务器断电，导致oracle无法正常启动报ORA-600 4194错误

Sat Jan 20 13:45:22 2024
ALTER DATABASE OPEN
Beginning crash recovery of 1 threads
 parallel recovery started with 32 processes
Started redo scan
Completed redo scan
 read 31 KB redo, 5 data blocks need recovery
Started redo application at
 Thread 1: logseq 9, block 3
Recovery of Online Redo Log: Thread 1 Group 3 Seq 9 Reading mem 0
  Mem# 0: D:\ORACLE\ORADATA\xff\REDO03.LOG
Completed redo application of 0.02MB
Completed crash recovery at
 Thread 1: logseq 9, block 66, scn 81924188
 5 data blocks read, 5 data blocks written, 31 redo k-bytes read
Thread 1 advanced to log sequence 10 (thread open)
Thread 1 opened at log sequence 10
  Current log# 1 seq# 10 mem# 0: D:\ORACLE\ORADATA\xff\REDO01.LOG
Successful open of redo thread 1
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
SMON: enabling cache recovery
Successfully onlined Undo Tablespace 2.
Verifying file header compatibility for 11g tablespace encryption..
Verifying 11g file header compatibility for tablespace encryption completed
SMON: enabling tx recovery
Database Characterset is AL32UTF8
No Resource Manager plan active
Errors in file d:\oracle\diag\rdbms\xff\xff\trace\xff_smon_5164.trc  (incident=384222):
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
Incident details in: d:\oracle\diag\rdbms\xff\xff\incident\incdir_384222\xff_smon_5164_i384222.trc
Errors in file d:\oracle\diag\rdbms\xff\xff\trace\xff_ora_6832.trc  (incident=384270):
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
Incident details in: d:\oracle\diag\rdbms\xff\xff\incident\incdir_384270\xff_ora_6832_i384270.trc
Doing block recovery for file 3 block 207
Resuming block recovery (PMON) for file 3 block 207
Block recovery from logseq 10, block 64 to scn 81924393
Recovery of Online Redo Log: Thread 1 Group 1 Seq 10 Reading mem 0
  Mem# 0: D:\ORACLE\ORADATA\xff\REDO01.LOG
Block recovery stopped at EOT rba 10.66.16
Block recovery completed at rba 10.66.16, scn 0.81924391
Doing block recovery for file 3 block 160
Resuming block recovery (PMON) for file 3 block 160
Block recovery from logseq 10, block 64 to scn 81924389
Recovery of Online Redo Log: Thread 1 Group 1 Seq 10 Reading mem 0
  Mem# 0: D:\ORACLE\ORADATA\xff\REDO01.LOG
Block recovery completed at rba 10.64.16, scn 0.81924390
Errors in file d:\oracle\diag\rdbms\xff\xff\trace\xff_smon_5164.trc:
ORA-01595: 释放区 (2) 回退段 (3) 时出错
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
Trace dumping is performing id=[cdmp_20240120134525]
Doing block recovery for file 3 block 3857
Resuming block recovery (PMON) for file 3 block 3857
Block recovery from logseq 10, block 64 to scn 81924396
Recovery of Online Redo Log: Thread 1 Group 1 Seq 10 Reading mem 0
  Mem# 0: D:\ORACLE\ORADATA\xff\REDO01.LOG
Block recovery stopped at EOT rba 10.66.16
Block recovery completed at rba 10.66.16, scn 0.81924391
Doing block recovery for file 3 block 272
Resuming block recovery (PMON) for file 3 block 272
Block recovery from logseq 10, block 64 to scn 81924390
Recovery of Online Redo Log: Thread 1 Group 1 Seq 10 Reading mem 0
  Mem# 0: D:\ORACLE\ORADATA\xff\REDO01.LOG
Block recovery completed at rba 10.66.16, scn 0.81924391
replication_dependency_tracking turned off (no async multimaster replication found)
Starting background process QMNC
Sat Jan 20 13:45:26 2024
QMNC started with pid=56, OS id=8052 
Exception [type: ACCESS_VIOLATION, UNABLE_TO_READ] [ADDR:0x66F8B134] [PC:0x93C7D88, kgegpa()+38]
Dump file d:\oracle\diag\rdbms\xff\xff\trace\alert_xff.log
Doing block recovery for file 3 block 3857
Resuming block recovery (PMON) for file 3 block 3857
Block recovery from logseq 10, block 64 to scn 81924396
Recovery of Online Redo Log: Thread 1 Group 1 Seq 10 Reading mem 0
  Mem# 0: D:\ORACLE\ORADATA\xff\REDO01.LOG
Block recovery completed at rba 10.66.16, scn 0.81924399
Errors in file d:\oracle\diag\rdbms\xff\xff\trace\xff_mmon_7876.trc  (incident=396089):
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-06512: 在 "SYS.DBMS_HA_ALERTS_PRVT", line 310
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], 
Doing block recovery for file 3 block 3857
Resuming block recovery (PMON) for file 3 block 3857
Block recovery from logseq 10, block 64 to scn 81924396
Recovery of Online Redo Log: Thread 1 Group 1 Seq 10 Reading mem 0
  Mem# 0: D:\ORACLE\ORADATA\xff\REDO01.LOG
Block recovery completed at rba 10.66.16, scn 0.81924399
Errors in file d:\oracle\diag\rdbms\xff\xff\trace\xff_pmon_8876.trc  (incident=384102):
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
Sat Jan 20 13:45:39 2024
Errors in file d:\oracle\diag\rdbms\xff\xff\trace\xff_pmon_8876.trc:
ORA-00600: 内部错误代码, 参数: [4194], [], [], [], [], [], [], [], [], [], [], []
PMON (ospid: 8876): terminating the instance due to error 472
Instance terminated by PMON, pid = 8876

这个故障比较简单,由于undo回滚异常导致,对异常的undo进行处理,数据库正常open,重建undo表空间导出数据,完成本次恢复工作

发表在 Oracle备份恢复 | 标签为 , | 评论关闭