标签归档：dmp损坏

expdp dmp被加密破坏恢复

发表于 2020 年 3 月 20 日 由 惜分飞

有朋友oracle数据库dmp备份被加密,后缀为:.DMP.voyager,通过分析发现文件加密2M左右
20200320134933

这里可以看出来dmp文件为expdp方式导出(expdp本质上xml方式存储,exp使用直接二进制方式存储),通过工具分析可恢复表情况.
通过工具对该dmp文件进行分析

CPFL> OPEN F:\BaiduNetdisk\KINGDEE85GH_2020-03-17.DMP.voyager
TABLE_NAME                                         START_POS       DATA_BYTE     
-------------------------------------------------- --------------- --------------- 
KINGDEE85GH.T_WFD_PROCESSDEF                       116300288       648396035       
KINGDEE85GH.T_DYN_DYNAMICCONFIGURE                 864710656       181453794       
KINGDEE85GH.T_RPTS_STORAGEFILEDATA                 1078767616      21548951        
KINGDEE85GH.T_BOT_RULESEGMENT                      1100324864      10372516        
KINGDEE85GH.T_LOG_APP                              1110712320      12603573        
KINGDEE85GH.T_PM_PERMITEM                          1123336192      7282412         
KINGDEE85GH.T_PM_USERORGPERM                       1130635264      6692320         
KINGDEE85GH.T_DYN_APPSOLUTION                      1137336320      801697          
KINGDEE85GH.T_PM_MAINMENUITEM                      1138155520      3573943         
KINGDEE85GH.T_PM_PERMUIGROUP                       1141751808      2159245         
KINGDEE85GH.T_SYS_ENTITYREF                        1143922688      4183869         
KINGDEE85GH.T_PM_ROLEPERM                          1148116992      2758960         
KINGDEE85GH.T_BAS_SYSMENUITEM                      1150885888      3304627         
KINGDEE85GH.T_JP_PAGE                              1154211840      3019174  
…………      
KINGDEE85GH.T_XT_CHECKTIME                         1212776448      41              
KINGDEE85GH.T_XT_SYNCHTIME                         1212784640      41              
SYSTEM.SYS_EXPORT_SCHEMA_02                        1212792832      215423380    
-------------------------------------------------- --------------- --------------- 
Scanned Find 895 segments.

通过这个基本上可以确定丢失了100多M数据，其他数据理论上可以恢复.
创建用户

SQL> create user KINGDEE85GHidentified by oracle;

User created.

SQL> grant dba to KINGDEE85GH;

Grant succeeded.

unexpdp数据(自动创建表和导入数据)

CPFL> unexpdp table KINGDEE85GH.T_WFD_PROCESSDEF

unexpdp table: KINGDEE85GH.T_WFD_PROCESSDEF storage(START_POSITION:116300288 DATA_BYTE:748396035)
824 rows unexpdp

查看恢复结果
20200320142445
20200320142034

如果你有oracle expdp dmp被加密或者破坏,无法正常导入数据库,可以联系我们对其进行恢复处理:提供(ORACLE数据库恢复技术支持)：
Phone:17813235971    Q Q:107644445    E-Mail:dba@xifenfei.com
如果你的oracle dmp是exp方式导出,也可以联系我们对其进行处理,参见:
exp dmp文件损坏恢复
oracle dmp被加密恢复

发表在 非常规恢复 | 标签为 , , , , | 评论关闭

exp dmp文件损坏(坏块/corruption)恢复—跳过dmp坏块

发表于 2015 年 8 月 18 日 由 惜分飞

在有些情况下，大家都知道通过dul可以恢复损坏的dmp文件的表的数据,但是该方法有很多问题，特别是对很多数据类型的支持不够完美,比如lob,long raw类型等,而且还有可能恢复出来数据大量丢失,本人通过对dmp结构的分析,使用使用一些特殊的技巧方法,可以实现对于损坏的dmp文件,通过跳过异常坏块所在表,继续恢复后续表,从而最大程度减少损坏
创建测试表

SQL> conn xifenfei/"www.xifenfei.com"
Connected.
SQL> create table t_xifenfei1 as select * from dba_objects;

Table created.

SQL> create table t_xifenfei2 as select * from v$sql;

Table created.

SQL> create table t_xifenfei3 as select * from dba_tables;

Table created.

SQL> select * from tab;

TNAME                          TABTYPE  CLUSTERID
------------------------------ ------- ----------
T_XIFENFEI1                    TABLE
T_XIFENFEI2                    TABLE
T_XIFENFEI3                    TABLE

SQL> select count(*) from t_xifenfei1;

  COUNT(*)
----------
     86275

SQL>  select count(*) from t_xifenfei2;

  COUNT(*)
----------
      3387

SQL>  select count(*) from t_xifenfei3;

  COUNT(*)
----------
      2800

导出来dmp文件

[oracle@web103 ~]$ exp "'/ as sysdba'" owner=xifenfei file=/data/temp/t_xifenfei.dmp log=/data/temp/exp_t_xifenfei.log

Export: Release 11.2.0.4.0 - Production on Tue Aug 18 22:08:30 2015

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.


Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in ZHS16GBK character set and AL16UTF16 NCHAR character set

About to export specified users ...
. exporting pre-schema procedural objects and actions
. exporting foreign function library names for user XIFENFEI 
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions for user XIFENFEI 
About to export XIFENFEI's objects ...
. exporting database links
. exporting sequence numbers
. exporting cluster definitions
. about to export XIFENFEI's tables via Conventional Path ...
. . exporting table                    T_XIFENFEI1      86275 rows exported
. . exporting table                    T_XIFENFEI2       3387 rows exported
. . exporting table                    T_XIFENFEI3       2800 rows exported
. exporting synonyms
. exporting views
. exporting stored procedures
. exporting operators
. exporting referential integrity constraints
. exporting triggers
. exporting indextypes
. exporting bitmap, functional and extensible indexes
. exporting posttables actions
. exporting materialized views
. exporting snapshot logs
. exporting job queues
. exporting refresh groups and children
. exporting dimensions
. exporting post-schema procedural objects and actions
. exporting statistics
Export terminated successfully without warnings.

获取dmp file中的T_XIFENFEI2所在位置
计划在该表上通过dd进行破坏,因此需要事先知道该表所在的dmp文件位置范围

CPFL> SEARCH TABLE T_XIFENFEI2 FROM EXPFILE  /tmp/t_xifenfei.dmp
9980561: TABLE "T_XIFENFEI2"
9980581: CREATE TABLE "T_XIFENFEI2" (表定义忽略)
9985356: BIND information for 87 columns
 col[  1] type 1 max length 1000 cset 852 (ZHS16GBK) form 1
 col[  2] type 112 max length 86 cset 852 (ZHS16GBK) form 1
 col[  3] type 1 max length 13 cset 852 (ZHS16GBK) form 1
 col[  4] type 2 max length 22
 col[  5] type 2 max length 22
 col[  6] type 2 max length 22
 col[  7] type 2 max length 22
 col[  8] type 2 max length 22
 col[  9] type 2 max length 22
 col[ 10] type 2 max length 22
 col[ 11] type 2 max length 22
 col[ 12] type 2 max length 22
 col[ 13] type 2 max length 22
 col[ 14] type 2 max length 22
 col[ 15] type 2 max length 22
 col[ 16] type 2 max length 22
 col[ 17] type 1 max length 38 cset 852 (ZHS16GBK) form 1
 col[ 18] type 2 max length 22
 col[ 19] type 2 max length 22
 col[ 20] type 2 max length 22
 col[ 21] type 2 max length 22
 col[ 22] type 2 max length 22
 col[ 23] type 2 max length 22
 col[ 24] type 2 max length 22
 col[ 25] type 2 max length 22
 col[ 26] type 2 max length 22
 col[ 27] type 2 max length 22
 col[ 28] type 2 max length 22
 col[ 29] type 2 max length 22
 col[ 30] type 2 max length 22
 col[ 31] type 1 max length 10 cset 852 (ZHS16GBK) form 1
 col[ 32] type 2 max length 22
 col[ 33] type 23 max length 2000
 col[ 34] type 2 max length 22
 col[ 35] type 2 max length 22
 col[ 36] type 2 max length 22
 col[ 37] type 1 max length 30 cset 852 (ZHS16GBK) form 1
 col[ 38] type 2 max length 22
 col[ 39] type 23 max length 8
 col[ 40] type 23 max length 8
 col[ 41] type 2 max length 22
 col[ 42] type 2 max length 22
 col[ 43] type 2 max length 22
 col[ 44] type 2 max length 22
 col[ 45] type 1 max length 64 cset 852 (ZHS16GBK) form 1
 col[ 46] type 2 max length 22
 col[ 47] type 1 max length 64 cset 852 (ZHS16GBK) form 1
 col[ 48] type 2 max length 22
 col[ 49] type 1 max length 64 cset 852 (ZHS16GBK) form 1
 col[ 50] type 2 max length 22
 col[ 51] type 2 max length 22
 col[ 52] type 1 max length 64 cset 852 (ZHS16GBK) form 1
 col[ 53] type 2 max length 22
 col[ 54] type 2 max length 22
 col[ 55] type 2 max length 22
 col[ 56] type 23 max length 8
 col[ 57] type 2 max length 22
 col[ 58] type 1 max length 1 cset 852 (ZHS16GBK) form 1
 col[ 59] type 1 max length 19 cset 852 (ZHS16GBK) form 1
 col[ 60] type 2 max length 22
 col[ 61] type 1 max length 38 cset 852 (ZHS16GBK) form 1
 col[ 62] type 1 max length 1 cset 852 (ZHS16GBK) form 1
 col[ 63] type 1 max length 1 cset 852 (ZHS16GBK) form 1
 col[ 64] type 1 max length 1 cset 852 (ZHS16GBK) form 1
 col[ 65] type 1 max length 1 cset 852 (ZHS16GBK) form 1
 col[ 66] type 2 max length 22
 col[ 67] type 1 max length 64 cset 852 (ZHS16GBK) form 1
 col[ 68] type 1 max length 30 cset 852 (ZHS16GBK) form 1
 col[ 69] type 1 max length 30 cset 852 (ZHS16GBK) form 1
 col[ 70] type 2 max length 22
 col[ 71] type 2 max length 22
 col[ 72] type 2 max length 22
 col[ 73] type 2 max length 22
 col[ 74] type 12 max length 7
 col[ 75] type 23 max length 2000
 col[ 76] type 2 max length 22
 col[ 77] type 2 max length 22
 col[ 78] type 2 max length 22
 col[ 79] type 2 max length 22
 col[ 80] type 2 max length 22
 col[ 81] type 2 max length 22
 col[ 82] type 2 max length 22
 col[ 83] type 2 max length 22
 col[ 84] type 2 max length 22
 col[ 85] type 2 max length 22
 col[ 86] type 2 max length 22
 col[ 87] type 2 max length 22
Conventional export
9986063: start of table data
19675141: TABLE "T_XIFENFEI3"

使用dd命令破坏T_XIFENFEI2所在位置的dmp文件

[oracle@web103 ~]$ dd if=/dev/zero of=/data/temp/t_xifenfei.dmp bs=1024 count=2 conv=notrunc seek=9747
2+0 records in
2+0 records out
2048 bytes (2.0 kB) copied, 1.6e-05 seconds, 128 MB/s

尝试imp导入被破坏的dmp文件数据

[oracle@web103 ~]$ imp "'/ as sysdba'" fromuser=xifenfei touser=xifenfeinew 
>file=/data/temp/t_xifenfei.dmp log=/data/temp/imp_t_xifenfei.log

Import: Release 11.2.0.4.0 - Production on Tue Aug 18 22:35:09 2015

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.


Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

Export file created by EXPORT:V11.02.00 via conventional path
import done in ZHS16GBK character set and AL16UTF16 NCHAR character set
. importing XIFENFEI's objects into XIFENFEINEW
. . importing table                  "T_XIFENFEI1"      86275 rows imported
IMP-00017: following statement failed with ORACLE error 1740:
 "CREATE TABLE "T_XIFENFEI2" ("SQL_TEXT" VARCHAR2(1000), "SQL_FULLTEXT" CLOB,"
 " "SQL_ID" VARCHAR2(13), "SHARABLE_MEM" NUMBER, "PERSISTENT_MEM" NUMBER, "RU"
 "NTIME_MEM" NUMBER, "SORTS" NUMBER, "LOADED_VERSIONS" NUMBER, "OPEN_VERSIONS"
 "" NUMBER, "USERS_OPENING" NUMBER, "FETCHES" NUMBER, "EXECUTIONS" NUMBER, "P"
 "X_SERVERS_EXECUTIONS" NUMBER, "END_OF_FETCH_COU"
IMP-00003: ORACLE error 1740 encountered
ORA-01740: missing double quote in identifier
IMP-00008: unrecognized statement in the export file: 
  
IMP-00008: unrecognized statement in the export file:

导入报IMP-00003 ORA-01740 IMP-00008,由于dmp文件被dd破坏(而且破坏位置是T_XIFENFEI2所在之处),因此imp导入到T_XIFENFEI2之时,抛出大量异常,imp终止

检查导入表情况

SQL> conn xifenfeinew/"www.xifenfei.com"
Connected.
SQL> select * from tab;

TNAME                          TABTYPE  CLUSTERID
------------------------------ ------- ----------
T_XIFENFEI1                    TABLE

SQL> select count(*) from t_xifenfei1;

  COUNT(*)
----------
     86275

和预期相符,表t_xifenfei1导入进去,但是t_xifenfei2由于坏块原因未导入,由于t_xifenfei3在t_xifenfei2之后,因此也未导入

使用CPFL程序抽取正常dmp文件

CPFL>getdmp '/data/temp/t_xifenfei.dmp' skip table 'T_XIFENFEI2'
>/data/temp/t_xifenfeinew.dmp

重新导入dmp文件

[oracle@web103 ~]$ imp "'/ as sysdba'" fromuser=xifenfei touser=xifenfeinew 
>file=/data/temp/t_xifenfeinew.dmp log=/data/temp/imp_t_xifenfeinew.log

Import: Release 11.2.0.4.0 - Production on Tue Aug 18 22:41:04 2015

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.


Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

Export file created by EXPORT:V11.02.00 via conventional path
import done in ZHS16GBK character set and AL16UTF16 NCHAR character set
. importing XIFENFEI's objects into XIFENFEINEW
. . importing table                  "T_XIFENFEI1"      86275 rows imported 
. . importing table                  "T_XIFENFEI3"       2800 rows imported
Import terminated successfully no warnings.

导入了t_xifenfei1，t_xifenfei3，果然t_xifenfei2被跳过

验证导入数据

[oracle@web103 ~]$ sqlplus xifenfeinew/"www.xifenfei.com"

SQL*Plus: Release 11.2.0.4.0 Production on Tue Aug 18 22:41:32 2015

Copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> select * from tab;

TNAME                          TABTYPE  CLUSTERID
------------------------------ ------- ----------
T_XIFENFEI1                    TABLE
T_XIFENFEI3                    TABLE

SQL> select count(*) from t_xifenfei1;

  COUNT(*)
----------
     86275

SQL> select count(*) from t_xifenfei3;

  COUNT(*)
----------
      2800

SQL>

通过验证数据证明，通过CPFL完美跳过了坏块所在表,实现后续数据完美恢复

发表在 Oracle | 标签为 , , , , , , | 评论关闭

exp dmp文件损坏恢复

发表于 2014 年 4 月 29 日 由 惜分飞

在有些时候,exp的dmp文件因为某种原因损坏(比如磁盘异常,exp过程损坏等),导致imp导入无法继续，下面的处理方法(直接读取dmp文件)来对dmp文件进行抢救性恢复,最大程度减少数据丢失损失
创建exp dmp文件并使用dd破坏

SQL> create table t_xifenfei as select * from dba_objects;

Table created.

SQL> select count(*) from t_xifenfei;

  COUNT(*)
----------
     90915

[oracle@localhost ~]$ exp chf/xifenfei@pdb1 file=/tmp/t_xifenfei.dmp tables=t_xifenfei

Export: Release 12.1.0.2.0  on Sun Apr 27 21:39:26 2014

Copyright (c) 1982, 2014, Oracle and/or its affiliates.  All rights reserved.


Connected to: Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses WE8MSWIN1252 character set (possible charset conversion)

About to export specified tables via Conventional Path ...
. . exporting table                     T_XIFENFEI      90915 rows exported
EXP-00091: Exporting questionable statistics.
Export terminated successfully with warnings.
[oracle@localhost ~]$ od -x /tmp/t_xifenfei.dmp |head -10
0000000 0003 4501 5058 524f 3a54 3156 2e32 3130
0000020 302e 0a30 4344 4648 520a 4154 4c42 5345
0000040 380a 3931 0a32 0a30 3237 300a 000a 0001
0000060 07b2 00d0 0001 0000 0000 0000 0000 0013
0000100 2020 2020 2020 2020 2020 2020 2020 2020
*
0000140 2020 2020 2020 2020 7553 206e 7041 2072
0000160 3732 3220 3a31 3933 323a 2036 3032 3431
0000200 742f 706d 742f 785f 6669 6e65 6566 2e69
0000220 6d64 0070 0000 0000 0000 0000 0000 0000

--strings命令看dmp文件
[oracle@localhost ~]$ strings /tmp/t_xifenfei.dmp |head -50
EXPORT:V12.01.00
DCHF
RTABLES
8192
                                         Tue Apr 29 0:39:49 2014/tmp/t_xifenfei.dmp
#G#G
#G#G
+08:00
BYTE
UNUSED
INTERPRETED
DISABLE:ALL
METRICST
TABLE "T_XIFENFEI"
CREATE TABLE "T_XIFENFEI" ("OWNER" VARCHAR2(128), "OBJECT_NAME" VARCHAR2(128), "SUBOBJECT_NAME" VARCHAR2(128), "OBJECT_ID" NUMBER, "DATA_OBJECT_ID" NUMBER, "OBJECT_TYPE" VARCHAR2(23), "CREATED" DATE, "LAST_DDL_TIME" DATE, "TIMESTAMP" VARCHAR2(19), "STATUS" VARCHAR2(7), "TEMPORARY" VARCHAR2(1), "GENERATED" VARCHAR2(1), "SECONDARY" VARCHAR2(1), "NAMESPACE" NUMBER, "EDITION_NAME" VARCHAR2(128), "SHARING" VARCHAR2(13), "EDITIONABLE" VARCHAR2(1), "ORACLE_MAINTAINED" VARCHAR2(1))  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE(INITIAL 13631488 NEXT 1048576 MINEXTENTS 1 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "USERS" LOGGING NOCOMPRESS
INSERT INTO "T_XIFENFEI" ("OWNER", "OBJECT_NAME", "SUBOBJECT_NAME", "OBJECT_ID", "DATA_OBJECT_ID", "OBJECT_TYPE", "CREATED", "LAST_DDL_TIME", "TIMESTAMP", "STATUS", "TEMPORARY", "GENERATED", "SECONDARY", "NAMESPACE", "EDITION_NAME", "SHARING", "EDITIONABLE", "ORACLE_MAINTAINED") VALUES (:1, :2, :3, :4, :5, :6, :7, :8, :9, :10, :11, :12, :13, :14, :15, :16, :17, :18)
PUBLIC
V$DATAGUARD_CONFIG
SYNONYM
2014-04-22:17:51:05
VALID
METADATA LINK
V_$DATAGUARD_STATS
VIEW
2014-04-22:17:51:05

--破坏exp dmp文件
[oracle@localhost ~]$ dd if=/dev/zero of=/tmp/t_xifenfei.dmp bs=1024 count=1 conv=notrunc
1+0 records in
1+0 records out
1024 bytes (1.0 kB) copied, 6.0291e-05 seconds, 17.0 MB/s
[oracle@localhost ~]$ od -x /tmp/t_xifenfei.dmp |head -10
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
0020000 0064 0000 6000 2401 050f 0c0b 0c03 050c
0020020 0504 060d 0709 0508 0505 0505 050f 0505
0020040 0505 050a 0505 0505 0504 0706 0808 4723
0020060 4723 1108 0823 4111 47b0 8300 b200 d007
0020100 0003 0000 0000 0000 0000 0000 0000 0000
0020120 0000 0000 0000 0000 0000 0000 0000 0000
0020140 0000 0000 0000 0064 0000 6000 2401 050f
0020160 0c0b 0c03 050c 0504 060d 0709 0508 0505

--损坏后的dmp文件使用strings命令看
[oracle@localhost ~]$ strings /tmp/t_xifenfei.dmp |head -50
#G#G
#G#G
+08:00
BYTE
UNUSED
INTERPRETED
DISABLE:ALL
METRICST
TABLE "T_XIFENFEI"
CREATE TABLE "T_XIFENFEI" ("OWNER" VARCHAR2(128), "OBJECT_NAME" VARCHAR2(128), "SUBOBJECT_NAME" VARCHAR2(128), "OBJECT_ID" NUMBER, "DATA_OBJECT_ID" NUMBER, "OBJECT_TYPE" VARCHAR2(23), "CREATED" DATE, "LAST_DDL_TIME" DATE, "TIMESTAMP" VARCHAR2(19), "STATUS" VARCHAR2(7), "TEMPORARY" VARCHAR2(1), "GENERATED" VARCHAR2(1), "SECONDARY" VARCHAR2(1), "NAMESPACE" NUMBER, "EDITION_NAME" VARCHAR2(128), "SHARING" VARCHAR2(13), "EDITIONABLE" VARCHAR2(1), "ORACLE_MAINTAINED" VARCHAR2(1))  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE(INITIAL 13631488 NEXT 1048576 MINEXTENTS 1 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "USERS" LOGGING NOCOMPRESS
INSERT INTO "T_XIFENFEI" ("OWNER", "OBJECT_NAME", "SUBOBJECT_NAME", "OBJECT_ID", "DATA_OBJECT_ID", "OBJECT_TYPE", "CREATED", "LAST_DDL_TIME", "TIMESTAMP", "STATUS", "TEMPORARY", "GENERATED", "SECONDARY", "NAMESPACE", "EDITION_NAME", "SHARING", "EDITIONABLE", "ORACLE_MAINTAINED") VALUES (:1, :2, :3, :4, :5, :6, :7, :8, :9, :10, :11, :12, :13, :14, :15, :16, :17, :18)
PUBLIC
V$DATAGUARD_CONFIG
SYNONYM
2014-04-22:17:51:05
VALID
METADATA LINK
V_$DATAGUARD_STATS

--imp 导入dmp文件失败
[oracle@localhost ~]$ imp chf/xifenfei@pdb1 file=/tmp/t_xifenfei.dmp full=y

Import: Release 12.1.0.2.0 -      on Sun Apr 27 22:02:40 2014

Copyright (c) 1982, 2014, Oracle and/or its affiliates.  All rights reserved.


Connected to: Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit 
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

IMP-00037: Character set marker unknown
IMP-00000: Import terminated unsuccessfully

这里通过分析可以知道，exp dmp文件虽然损坏了一点,但是通过strings命令看，相关记录依然存在,因此可以通过工具去读exp dmp文件,然后分析得出相关数据

恢复损坏exp dmp文件数据

CPFL> SEARCH TABLE T_XIFENFEI FROM EXPFILE  /tmp/t_xifenfei.dmp
8461: TABLE "T_XIFENFEI"
8480: CREATE TABLE "T_XIFENFEI" ("OWNER" VARCHAR2(128), "OBJECT_NAME" VARCHAR2(128), "SUBOBJECT_NAME" VARCHAR2(128), "OBJECT_ID" NUMBER, "DATA_OBJECT_ID" NUMBER, "OBJECT_TYPE" VARCHAR2(23), "CREATED" DATE, "LAST_DDL_TIME" DATE, "TIMESTAMP" VARCHAR2(19), "STATUS" VARCHAR2(7), "TEMPORARY" VARCHAR2(1), "GENERATED" VARCHAR2(1), "SECONDARY" VARCHAR2(1), "NAMESPACE" NUMBER, "EDITION_NAME" VARCHAR2(128), "SHARING" VARCHAR2(13), "EDITIONABLE" VARCHAR2(1), "ORACLE_MAINTAINED" VARCHAR2(1))  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE(INITIAL 8388608 NEXT 1048576 MINEXTENTS 1 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "USERS" LOGGING NOCOMPRESS
9145: INSERT INTO "T_XIFENFEI" ("OWNER", "OBJECT_NAME", "SUBOBJECT_NAME", "OBJECT_ID", "DATA_OBJECT_ID", "OBJECT_TYPE", "CREATED", "LAST_DDL_TIME", "TIMESTAMP", "STATUS", "TEMPORARY", "GENERATED", "SECONDARY", "NAMESPACE", "EDITION_NAME", "SHARING", "EDITIONABLE", "ORACLE_MAINTAINED") VALUES (:1, :2, :3, :4, :5, :6, :7, :8, :9, :10, :11, :12, :13, :14, :15, :16, :17, :18)
Conventional export
9644: start of table data
12331252: TABLE "T_XIFENFEI"
12331349: ENDTABLE
CPFL> UNLOAD  TABLE "T_XIFENFEI" ("OWNER" VARCHAR2(128), "OBJECT_NAME" VARCHAR2(128), "SUBOBJECT_NAME" VARCHAR2(128), "OBJECT_ID" NUMBER, "DATA_OBJECT_ID" NUMBER, "OBJECT_TYPE" VARCHAR2(23), "CREATED" DATE, "LAST_DDL_TIME" DATE, "TIMESTAMP" VARCHAR2(19), "STATUS" VARCHAR2(7), "TEMPORARY" VARCHAR2(1), "GENERATED" VARCHAR2(1), "SECONDARY" VARCHAR2(1), "NAMESPACE" NUMBER, "EDITION_NAME" VARCHAR2(128), "SHARING" VARCHAR2(13), "EDITIONABLE" VARCHAR2(1), "ORACLE_MAINTAINED" VARCHAR2(1))  expfile  /tmp/t_xifenfei.dmp from 8480 until 12331349

--因为exp dmp文件损坏记录
CPFL: Error: column 1 length 21059 exceeds max bind size 128
0000000000 45415445 20544142 4c452022 545f5849 EATE  TAB LE " T_XI 
0000000016 46454e46 45492220 28224f57 4e455222 FENF EI"  ("OW NER" 
0000000032 20564152 43484152                    VAR CHAR           
8480: column 1 type VARCHAR2 size 21059 failed
8480: row 1 failed
row conversion failure, retrying from offset 8481
CPFL: Error: Zero (illegal) length column number 2
…………
CPFL: Error: Zero (illegal) length column number 1
9644: succesful conversion      1164 bytes skipped due to conversion problems
131877: row 1000 ok
253310: row 2000 ok
…………
12200617: row 90000 ok
Unloaded 90915 rows, end of table marker at 12322835

[oracle@localhost CPFL]$ ls -ltr T_XIFENFEI.*
-rw-r--r-- 1 oracle oinstall 17230747 Apr 27 22:12 T_XIFENFEI.dat
-rw-r--r-- 1 oracle oinstall     1489 Apr 27 22:17 T_XIFENFEI.ctl

导入数据并对比

SQL> create table t_xifenfei_exp as select * from t_xifenfei where 1=0;

Table created.

[oracle@localhost CPFL]$ more T_XIFENFEI.ctl 

load data
CHARACTERSET UTF8
infile 'T_XIFENFEI.dat'
insert
into table "T_XIFENFEI_EXP"  ---修改为T_XIFENFEI_EXP表
fields terminated by whitespace
(
  "OWNER"                            CHAR(128) enclosed by X'7C'
 ,"OBJECT_NAME"                      CHAR(128) enclosed by X'7C'
 ,"SUBOBJECT_NAME"                   CHAR(29) enclosed by X'7C'
 ,"OBJECT_ID"                        CHAR(5) enclosed by X'7C'
 ,"DATA_OBJECT_ID"                   CHAR(5) enclosed by X'7C'
 ,"OBJECT_TYPE"                      CHAR(20) enclosed by X'7C'
 ,"CREATED"                          DATE "DD-MON-YYYY AD HH24:MI:SS" enclosed by X'7C'
 ,"LAST_DDL_TIME"                    DATE "DD-MON-YYYY AD HH24:MI:SS" enclosed by X'7C'
 ,"TIMESTAMP"                        CHAR(19) enclosed by X'7C'
 ,"STATUS"                           CHAR(5) enclosed by X'7C'
 ,"TEMPORARY"                        CHAR(1) enclosed by X'7C'
 ,"GENERATED"                        CHAR(1) enclosed by X'7C'
 ,"SECONDARY"                        CHAR(1) enclosed by X'7C'
 ,"NAMESPACE"                        CHAR(2) enclosed by X'7C'
 ,"EDITION_NAME"                     CHAR(1) enclosed by X'7C'
 ,"SHARING"                          CHAR(13) enclosed by X'7C'
 ,"EDITIONABLE"                      CHAR(1) enclosed by X'7C'
 ,"ORACLE_MAINTAINED"                CHAR(1) enclosed by X'7C'
 ,"UNEXP_STATUS"                     FILLER CHAR(3) enclosed by X'7C'
)

[oracle@localhost CPFL]$ sqlldr chf/xifenfei@pdb1 control=T_XIFENFEI.ctl 

SQL*Loader: Release 12.1.0.1.0       on Sun Apr 27 22:17:54 2014

Copyright (c) 1982, 2014, Oracle and/or its affiliates.  All rights reserved.

Path used:      Conventional
Commit point reached - logical record count 64
Commit point reached - logical record count 128
Commit point reached - logical record count 192
…………
Commit point reached - logical record count 90887
Commit point reached - logical record count 90915

Table "T_XIFENFEI_EXP":
  90915 Rows successfully loaded.

Check the log file:
  T_XIFENFEI.log
for more information about the load.
[oracle@localhost CPFL]$ sqlplus chf/xifenfei@pdb1

SQL*Plus: Release 12.1.0.2.0 Beta on Sun Apr 27 22:18:08 2014

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

Last Successful login time: Sun Apr 27 2014 22:17:54 +08:00

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit     
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> select count(*) from t_xifenfei_exp;

  COUNT(*)
----------
     90915

SQL> select * from t_xifenfei 
  2  minus
  3  select * from t_xifenfei_exp;

no rows selected

通过这里可以看出来，在exp dmp文件有部分损坏的情况下,还是可以通过直接读取dmp文件的方式恢复全部或者部分exp dmp文件中内容(具体恢复量取决于dmp文件损坏程度)

如果你在使用这些思路进行恢复遇到突发情况不能自行解决,请联系我们(ORACLE数据库恢复技术支持),将为您提供专业数据库技术支持：
Phone:17813235971    Q Q:107644445    E-Mail:dba@xifenfei.com

发表在 非常规恢复 | 标签为 , , | 2 条评论