老古董的东西,在你一不小心的时候就可能遇到,测试了dul成功挖ORACLE 8.0数据库
创建模拟环境

SVRMGR> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle8 Release 8.0.5.0.0 - Production
PL/SQL Release 8.0.5.0.0 - Production
CORE Version 4.0.5.0.0 - Production
TNS for 32-bit Windows: Version 8.0.5.0.0 - Production
NLSRTL Version 3.3.2.0.0 - Production
5 rows selected.
SVRMGR> create table t_xifenfei
     2> as
     3> select * from dba_tables;
Statement processed.
SVRMGR> select count(*) from t_xifenfei;
COUNT(*)
----------
       183
1 row selected.
SVRMGR> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

dul参数配置

    osd_big_endian_flag=false
    osd_dba_file_bits=10
    osd_c_struct_alignment=32
    osd_file_leader_size=1
    dc_columns=2000000
    dc_tables=10000
    dc_objects=1000000
    dc_users=400
    dc_segments=100000
    control_file = control.txt
    db_block_size=2048
    export_mode=true
    compatible=8
    file = dump

dul挖数据

C:\dul>dul8.exe dictv8.ddl
Data UnLoader 8.0.6.8 - Internal Use Only - on Thu Jul 26 20:08:33 2012
with 64-bit io functions
Copyright (c) 1994/2000 Bernard van Duijnen All rights reserved.
DUL: Warning: Recreating file "dul.log"
Parameter altered
Parameter altered
Parameter altered
Parameter altered
. unloading table                      OBJ$    2681 rows unloaded
. unloading table                      TAB$     187 rows unloaded
. unloading table                      COL$   11181 rows unloaded
. unloading table                     USER$      23 rows unloaded
. unloading table                  TABPART$       0 rows unloaded
. unloading table                      IND$     221 rows unloaded
. unloading table                     ICOL$     419 rows unloaded
. unloading table                      LOB$      13 rows unloaded
Life is DUL without it
C:\dul>dul8.exe
Data UnLoader 8.0.6.8 - Internal Use Only - on Thu Jul 26 20:13:44 2012
with 64-bit io functions
Copyright (c) 1994/2000 Bernard van Duijnen All rights reserved.
DUL: Warning: Recreating file "dul.log"
Loaded 23 entries from USER.dat
Loaded 2681 entries from OBJ.dat
Loaded 188 entries from TAB.dat
Loaded 11218 entries from COL.dat
Loaded 0 entries from TABPART.dat
Loaded 221 entries from IND.dat
Loaded 13 entries from LOB.dat
Loaded 419 entries from ICOL.dat
DUL> unload table chf.t_xifenfei;
. unloading table                T_XIFENFEI     183 rows unloaded

启动8.0数据库

C:\oracle\ora80\BIN>SVRMGR30.EXE
Oracle Server Manager Release 3.0.5.0.0 - Production
(c) Copyright 1997, Oracle Corporation.  All Rights Reserved.
Oracle8 Release 8.0.5.0.0 - Production
PL/SQL Release 8.0.5.0.0 - Production
SVRMGR> connect internal/xifenfei
Connected.
SVRMGR> startup
ORACLE instance started.
Total System Global Area                         15077376 bytes
Fixed Size                                          49152 bytes
Variable Size                                    12906496 bytes
Database Buffers                                  2048000 bytes
Redo Buffers                                        73728 bytes
Database mounted.
Database opened.

imp导入数据

C:\dul>imp chf/xifenfei file=dump001.dmp full=y
Import: Release 8.0.5.0.0 - Production on 星期二 11月 1 23:34:36 2011
(c) Copyright 2000 Oracle Corporation.  All rights reserved.
连接到: Oracle8 Release 8.0.5.0.0 - Production
PL/SQL Release 8.0.5.0.0 - Production
经由常规路径导出由EXPORT:V07.00.07创建的文件
警告: 此对象由 Bernard's DUL 导出, 而不是当前用户
. 正在将Bernard's DUL的对象导入到 CHF
. . 正在导入表                    "T_XIFENFEI"        183行被导入
成功终止导入，但出现警告。

测试恢复数据

SVRMGR> connect chf/xifenfei
Connected.
SVRMGR> select count(*) from t_xifenfei;
COUNT(*)
----------
       183
1 row selected.

再次证明了dul确实异常的强大,第三方的工具在某些方面确实不是它的对手

在有次8i的库恢复中,因为硬盘损坏导致几个表出现很多诡异性坏块,尝试使用dul对其进行挖掘数据,当时使用dul 9 遇到一个难题:当一张表中有lob类型,同时又有varchar2类型,而且varchar2类型数据中包含回车键,使得解决起来很麻烦(因为export_mode=false支持lob,但是不支持字符串含回车;export_mode=true支持字符串含回车,但是不支持lob),最后放弃了对部分数据的挖掘.这个问题让我一直不甘心,今天测试dul 10 发现是用export_mode=true可以完美解决该问题
创建模拟表和插入数据

SQL> desc t_xff
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 C_BLOB                                             BLOB
 C_VARCHAR                                          VARCHAR2(4000)
SQL> declare
  2  a_blob BLOB;
  3  bfile_name BFILE := BFILENAME('ULTLOBDIR','awr_ora11g_2012-06-01_174_175.html');
  4  begin
  5  insert into t_xff(C_BLOB,C_VARCHAR) values (
  6  empty_blob(),
  7  'www.xifenfei.com
  8  WWW.XIFENFEI.COM
  9  惜分飞
 10  欢迎访问惜分飞博客
 11  提供数据库异常恢复技术支持')
 12  returning C_BLOB into a_blob;
 13  dbms_lob.fileopen(bfile_name);
 14  dbms_lob.loadfromfile(a_blob, bfile_name, dbms_lob.getlength(bfile_name));
 15  dbms_lob.fileclose(bfile_name);
 16  commit;
 17  end;
 18  /
PL/SQL procedure successfully completed.
SQL> select length(c_varchar),dbms_lob.getlength(c_blob) from t_xff;
LENGTH(C_VARCHAR) DBMS_LOB.GETLENGTH(C_BLOB)
----------------- --------------------------
               61                    4282573
SQL>  select c_varchar from t_xff;
C_VARCHAR
---------------------------------------------------------------
www.xifenfei.com
WWW.XIFENFEI.COM
惜分飞
欢迎访问惜分飞博客
提供数据库异常恢复技术支持

dul 挖数据

[oracle@xifenfei dul]$ ./dul
Data UnLoader: 10.2.0.5.13 - Internal Only - on Mon Jul  2 04:29:10 2012
with 64-bit io functions
Copyright (c) 1994 2012 Bernard van Duijnen All rights reserved.
 Strictly Oracle Internal Use Only
DUL> bootstrap;
DUL> desc chf.t_xff;
Table CHF.T_XFF
obj#= 51353, dataobj#= 51353, ts#= 4, file#= 4, block#=67
      tab#= 0, segcols= 2, clucols= 0
Column information:
icol# 01 segcol# 01       C_BLOB len 4000 type 113 BLOB
  LOB Segment: dataobj#= 51354, ts#= 4, file#= 4, block#=75 chunk=1
  LOB Index: dataobj#= 51355, ts#= 4, file#= 4, block#=83
icol# 02 segcol# 02    C_VARCHAR len 4000 type  1 VARCHAR2 cs 852(ZHS16GBK)
--export_mode=false
DUL> unload table chf.t_xff;
. unloading (index organized) table     LOB01000053      65 rows unloaded
Preparing lob metadata from lob index
Reading LOB01000053.dat 65 entries loaded and sorted 65 entries
. unloading table                     T_XFF       1 row  unloaded
--导出数据文件
-rw-r--r-- 1 oracle oinstall 6.1K Jul  2 04:15 LOB01000053.dat
-rw-r--r-- 1 oracle oinstall  335 Jul  2 04:15 LOB01000053.ctl
-rw-r--r-- 1 oracle oinstall 8.2M Jul  2 04:15 CHF_T_XFF.dat
-rw-r--r-- 1 oracle oinstall  263 Jul  2 04:15 CHF_T_XFF.ctl
----export_mode=true
DUL> unload table chf.t_xff;
. unloading (index organized) table     LOB01000053
DUL: Warning: Recreating file "LOB01000053.ctl"
      65 rows unloaded
Preparing lob metadata from lob index
Reading LOB01000053.dat 65 entries loaded and sorted 65 entries
. unloading table                     T_XFF       1 row  unloaded
--导出数据文件
-rw-r--r-- 1 oracle oinstall    6229 Jul  2 04:29 LOB01000053.dat
-rw-r--r-- 1 oracle oinstall     335 Jul  2 04:29 LOB01000053.ctl
-rw-r--r-- 1 oracle oinstall 4285027 Jul  2 04:29 CHF_T_XFF.dmp

导入数据测试
sqlldr导入

SQL> truncate table chf.t_xff;
Table truncated.
[oracle@xifenfei dul]$ sqlldr chf/xifenfei control=CHF_T_XFF.ctl
SQL*Loader: Release 10.2.0.1.0 - Production on Mon Jul 2 04:23:18 2012
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
SQL*Loader-510: Physical record in data file (CHF_T_XFF.dat) is longer than the maximum(1048576)
SQL*Loader-2026: the load was aborted because SQL Loader cannot continue.
[oracle@xifenfei dul]$ sqlldr chf/xifenfei control=CHF_T_XFF.ctl readsize=20971520
SQL*Loader: Release 10.2.0.1.0 - Production on Mon Jul 2 04:26:50 2012
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
SQL> select length(c_varchar),dbms_lob.getlength(c_blob) from chf.t_xff;
no rows selected
--试验结果证明在出现表中同时有lob和varchar2列(含回车)时,export_mode=false不能正常工作

imp导入

SQL> drop table chf.t_xff;
Table dropped.
[oracle@xifenfei dul]$ imp chf/xifenfei file=CHF_T_XFF.dmp full=y
Import: Release 10.2.0.1.0 - Production on Mon Jul 2 04:30:30 2012
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
Export file created by EXPORT:V07.00.07 via conventional path
Warning: the objects were exported by Bernard's DUL, not by you
. importing Bernard's DUL's objects into CHF
. importing Bernard's DUL's objects into CHF
. . importing table                        "T_XFF"          1 rows imported
SQL> select length(c_varchar),dbms_lob.getlength(c_blob) from t_xff;
LENGTH(C_VARCHAR) DBMS_LOB.GETLENGTH(C_BLOB)
----------------- --------------------------
               61                    4282573
SQL>  select c_varchar from t_xff;
C_VARCHAR
---------------------------------------------------------------
www.xifenfei.com
WWW.XIFENFEI.COM
惜分飞
欢迎访问惜分飞博客
提供数据库异常恢复技术支持
--试验结果证明在出现表中同时有lob和varchar2列(含回车)时,export_mode=true正常工作

最近测试了下dul,整体感觉和odu差不多
1.配置init.dul

[oracle@xifenfei dul]$ more init.dul
osd_big_endian_flag=false
osd_dba_file_bits=10
osd_c_struct_alignment=32
osd_file_leader_size=1
osd_word_size = 32
dc_columns=2000000
dc_tables=10000
dc_objects=1000000
dc_users=400
dc_segments=100000
Buffer=10485760
control_file = control.txt
db_block_size=8192
export_mode=true
--false表示是sqlloader,true表示imp
compatible=10

2.配置控制文件

[oracle@xifenfei dul]$ more control.txt
         0          1 /u01/oracle/oradata/XFF/system01.dbf
         1          2 /u01/oracle/oradata/XFF/undotbs01.dbf
         2          3 /u01/oracle/oradata/XFF/sysaux01.dbf
         4          4 /u01/oracle/oradata/XFF/users01.dbf
         6          5 /u01/oracle/oradata/XFF/datfttuser.dbf
--sql语句
select ts#,rfile#,name from v$datafile;

3.启动dul

[oracle@xifenfei dul]$ ./dul
Data UnLoader: 10.2.0.5.13 - Internal Only - on Sun Jun 10 06:39:47 2012
with 64-bit io functions
Copyright (c) 1994 2012 Bernard van Duijnen All rights reserved.
 Strictly Oracle Internal Use Only
Found db_id = 3426707456
Found db_name = XFF

4.加载初始化数据字典

DUL> BOOTSTRAP;
Probing file = 1, block = 377
. unloading table                BOOTSTRAP$
DUL: Warning: block number is non zero but marked deferred trying to process it anyhow
      57 rows unloaded
DUL: Warning: Dictionary cache DC_BOOTSTRAP is empty
Reading BOOTSTRAP.dat 57 entries loaded
Parsing Bootstrap$ contents
Generating dict.ddl for version 10
 OBJ$: segobjno 18, file 1 block 121
 TAB$: segobjno 2, tabno 1, file 1  block 25
 COL$: segobjno 2, tabno 5, file 1  block 25
 USER$: segobjno 10, tabno 1, file 1  block 89
Running generated file "@dict.ddl" to unload the dictionary tables
. unloading table                      OBJ$   50930 rows unloaded
. unloading table                      TAB$    1593 rows unloaded
. unloading table                      COL$   55163 rows unloaded
. unloading table                     USER$      61 rows unloaded
Reading USER.dat 61 entries loaded
Reading OBJ.dat 50930 entries loaded and sorted 50930 entries
Reading TAB.dat 1593 entries loaded
Reading COL.dat 55163 entries loaded and sorted 55163 entries
Reading BOOTSTRAP.dat 57 entries loaded
DUL: Warning: Recreating file "dict.ddl"
Generating dict.ddl for version 10
 OBJ$: segobjno 18, file 1 block 121
 TAB$: segobjno 2, tabno 1, file 1  block 25
 COL$: segobjno 2, tabno 5, file 1  block 25
 USER$: segobjno 10, tabno 1, file 1  block 89
 TABPART$: segobjno 266, file 1 block 2121
 INDPART$: segobjno 271, file 1 block 2161
 TABCOMPART$: segobjno 288, file 1 block 2297
 INDCOMPART$: segobjno 293, file 1 block 2345
 TABSUBPART$: segobjno 278, file 1 block 2217
 INDSUBPART$: segobjno 283, file 1 block 2257
 IND$: segobjno 2, tabno 3, file 1  block 25
 ICOL$: segobjno 2, tabno 4, file 1  block 25
 LOB$: segobjno 2, tabno 6, file 1  block 25
 COLTYPE$: segobjno 2, tabno 7, file 1  block 25
 TYPE$: segobjno 181, tabno 1, file 1  block 1297
 COLLECTION$: segobjno 181, tabno 2, file 1  block 1297
 ATTRIBUTE$: segobjno 181, tabno 3, file 1  block 1297
 LOBFRAG$: segobjno 299, file 1 block 2393
 LOBCOMPPART$: segobjno 302, file 1 block 2425
 UNDO$: segobjno 15, file 1 block 105
 TS$: segobjno 6, tabno 2, file 1  block 57
 PROPS$: segobjno 96, file 1 block 721
Running generated file "@dict.ddl" to unload the dictionary tables
. unloading table                      OBJ$
DUL: Warning: Recreating file "OBJ.ctl"
   50930 rows unloaded
. unloading table                      TAB$
DUL: Warning: Recreating file "TAB.ctl"
    1593 rows unloaded
. unloading table                      COL$
DUL: Warning: Recreating file "COL.ctl"
   55163 rows unloaded
. unloading table                     USER$
DUL: Warning: Recreating file "USER.ctl"
      61 rows unloaded
. unloading table                  TABPART$      90 rows unloaded
. unloading table                  INDPART$      99 rows unloaded
. unloading table               TABCOMPART$       0 rows unloaded
. unloading table               INDCOMPART$       0 rows unloaded
. unloading table               TABSUBPART$       0 rows unloaded
. unloading table               INDSUBPART$       0 rows unloaded
. unloading table                      IND$    2251 rows unloaded
. unloading table                     ICOL$    3669 rows unloaded
. unloading table                      LOB$     537 rows unloaded
. unloading table                  COLTYPE$    1702 rows unloaded
. unloading table                     TYPE$    1886 rows unloaded
. unloading table               COLLECTION$     552 rows unloaded
. unloading table                ATTRIBUTE$    7051 rows unloaded
. unloading table                  LOBFRAG$       1 row  unloaded
. unloading table              LOBCOMPPART$       0 rows unloaded
. unloading table                     UNDO$      21 rows unloaded
. unloading table                       TS$       7 rows unloaded
. unloading table                    PROPS$      27 rows unloaded
Reading USER.dat 61 entries loaded
Reading OBJ.dat 50930 entries loaded and sorted 50930 entries
Reading TAB.dat 1593 entries loaded
Reading COL.dat 55163 entries loaded and sorted 55163 entries
Reading TABPART.dat 90 entries loaded and sorted 90 entries
Reading TABCOMPART.dat 0 entries loaded and sorted 0 entries
Reading TABSUBPART.dat 0 entries loaded and sorted 0 entries
Reading INDPART.dat 99 entries loaded and sorted 99 entries
Reading INDCOMPART.dat 0 entries loaded and sorted 0 entries
Reading INDSUBPART.dat 0 entries loaded and sorted 0 entries
Reading IND.dat 2251 entries loaded
Reading LOB.dat 537 entries loaded
Reading ICOL.dat 3669 entries loaded
Reading COLTYPE.dat 1702 entries loaded
Reading TYPE.dat 1886 entries loaded
Reading ATTRIBUTE.dat 7051 entries loaded
Reading COLLECTION.dat 552 entries loaded
Reading BOOTSTRAP.dat 57 entries loaded
Reading LOBFRAG.dat 1 entries loaded and sorted 1 entries
Reading LOBCOMPPART.dat 0 entries loaded and sorted 0 entries
Reading UNDO.dat 21 entries loaded
Reading TS.dat 7 entries loaded
Reading PROPS.dat 27 entries loaded
Database character set is ZHS16GBK
Database national character set is AL16UTF16

5.导出某种表

DUL> desc chf.t_xifenfei;
Table CHF.T_XIFENFEI
obj#= 52189, dataobj#= 52189, ts#= 4, file#= 4, block#=123
      tab#= 0, segcols= 2, clucols= 0
Column information:
icol# 01 segcol# 01           ID len   22 type  2 NUMBER(0,-127)
icol# 02 segcol# 02         NAME len  100 type  1 VARCHAR2 cs 852(ZHS16GBK)
DUL> UNLOAD TABLE chf.t_xifenfei;
. unloading table                T_XIFENFEI       2 rows unloaded

6.验证导出dmp文件

[oracle@xifenfei dul]$ strings  CHF_T_XIFENFEI.dmp
EXPORT:V07.00.07
UBernard's DUL
RTABLES
1024
                                                Direct UnLoader(C) in EXPort mode
TABLE "T_XIFENFEI"
CREATE TABLE "T_XIFENFEI"("ID" NUMBER,"NAME" VARCHAR2(100))
INSERT INTO "T_XIFENFEI" ("ID", "NAME") VALUES (:1, :2)
www.xifenfei.com
WWW.XIFENEI.COM
EXIT