[20190212]刪除tab$記錄的恢復3.txt

--//春節前幾天做了刪除tan$記錄的測試,連結:

http://blog.itpub.net/267265/viewspace-2565245/=> [20190130]刪除tab$記錄的恢復.txt

http://blog.itpub.net/267265/viewspace-2565250/=> [20190130]刪除tab$記錄的恢復2.txt

--//實際上我一直認為能複製出來資料就ok了.這樣恢復的資料庫不能在使用,問題多多.

--//我繼續測試實際上建表等操作都會報類似的:

ORA-00600: internal error code, arguments: [kdBlkCheckError], [1], [94232], [6110], [], [], [], [], [], [], [], []

--//這樣的錯誤.主要問題在於system塊的檢查更加嚴格.

--//今天嘗試恢復6110,6111,6112之類的錯誤.

1.環境:

SCOTT@book> @ ver1

PORT_STRING VERSION BANNER

------------------------------ -------------- --------------------------------------------------------------------------------

x86_64/Linux 2.4.xx 11.2.0.4.0 Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

--//前面已經恢復只讀狀態exp操作是正常的.具體看前面的文章.

--//首先更正前面指令碼的幾個錯誤:http://blog.itpub.net/267265/viewspace-2565250/=> [20190130]刪除tab$記錄的恢復2.txt

57 echo "x /rx dba $dba *kdbr[$begin]" | rlbbed | egrep "^^flag@.*: *0x7c" > /dev/null

--//原來寫成echo "x /rx dba $dba *kdbr[$begin]" | rlbbed | egrep "^^flag@.*: 0x7c" > /dev/null ,可能出現多個空格的情況.

58 if [ $? -eq 0 ]

59 then

60 echo "dba=$dba;ckix_value=0" >> scan4a.txt

61 fi

$ cat scana.sh

#! /bin/bash

cat clearout.txt | while read dba

do

echo set dba $dba

echo -n "assign "

--//這裡寫錯,原來寫成4204236,實際上應該是$dba,

echo sum apply dba $dba

done

--//注:http://blog.itpub.net/267265/viewspace-2565250/=> [20190130]刪除tab$記錄的恢復2.txt 裡面的指令碼已經更正.

2.我前面做了冷備份.首先恢復冷備份:

$ /bin/cp -r /home/oracle/backup/book_20190122_bad/* /mnt/ramdisk/book/

*/

$ . scan.sh

process 1 start : 2019/02/12 08:45:44 scan dba 1,144 , create scan1.txt about ktetbdba,ktetbnbk

process 1 finish: 2019/02/12 08:45:44,enter continue...

process 2 start : 2019/02/12 08:45:45 scan block , get kdbtnrow,kdbtoffs ang grep kdbtnrow=0

process 2 finish: 2019/02/12 08:46:16,enter continue...

process 3 start : 2019/02/12 08:46:50 scan block , create bbed'script scan3_bbed.txt for modify delete of flag and create scan4a.txt about block of ckix

process 3 finish: 2019/02/12 08:52:01,enter continue...

process 4 start : 2019/02/12 08:52:06 create bbed's scan4_bbed.txt for modify cluster of mref of value

process 4 finish: 2019/02/12 08:53:12,enter continue...

process 5 start : create bbed's scan5_bbed.txt for sum apply

process 5 finish: 2019/02/12 08:54:11,enter continue...

--//檢視生成的bbed指令碼:

$ cat scan4m_bbed.txt

assign dba 4288539 offset 8169 = 1

assign dba 4288546 offset 8145 = 1

--//前面我提到過這2塊dba的不需要恢復(裡面記錄的scn不是這個事務產生的),或者講scan4m_bbed.txt指令碼記錄的dba可能存在多恢復記錄的情況.最好仔細檢查.

$ grep -v 0x6c scan3_bbed.txt

assign /x dba 4194451 offset 7349 = 0x20

assign /x dba 4197642 offset 7888 = 0x20

assign /x dba 4207636 offset 7087 = 0x20

assign /x dba 4225801 offset 3621 = 0x4c

assign /x dba 4225801 offset 4436 = 0x4c

assign /x dba 4288537 offset 7717 = 0x4c

--//這3條記錄存在行連結或者遷移的情況,前面已經解析不再說明.

--//修改scan3_bbed.txt檔案,註解如下2行不需要恢復.

$ grep ^# scan3_bbed.txt

#assign /x dba 4288539 offset 7920 = 0x6c

#assign /x dba 4288546 offset 7851 = 0x6c

$ grep 0x6c scan3_bbed.txt | grep -v "^#" |wc

2963 23704 124395

--//2963+3=2966,這樣恢復的記錄數量與實際情況相符.

3.執行生成的bbed指令碼並修復塊 6110,6111,6112錯誤.

bbed parfile=/home/oracle/bbed/bbed.par cmdfile=/home/oracle/hrp430/bbed/scan3_bbed.txt

bbed parfile=/home/oracle/bbed/bbed.par cmdfile=/home/oracle/hrp430/bbed/scan4k_bbed.txt

bbed parfile=/home/oracle/bbed/bbed.par cmdfile=/home/oracle/hrp430/bbed/scan5_bbed.txt

--//前面提到啟動遇到如下錯誤,主要是因為延遲塊提交的問題:

ORA-00600: internal error code, arguments: [kdBlkCheckError], [1], [94232], [6110], [], [], [], [], [], [], [], []

ORA-00600: internal error code, arguments: [kdBlkCheckError], [1], [9951], [6110], [], [], [], [], [], [], [], []

ORA-00600: internal error code, arguments: [kdBlkCheckError], [1], [31548], [6110], [], [], [], [], [], [], [], []

--//編寫指令碼如下,主要獲得延遲塊提交的資料塊,設定提交標識.並且將對應的ktbbhitl[N]._ktbitun._ktbitfsc=0.

--//這樣會導致verify時出現如下錯誤,例子:

BBED> set dba 4204236

DBA 0x004026cc (4204236 1,9932)

BBED> verify

DBVERIFY - Verification starting

FILE = /mnt/ramdisk/book/system01.dbf

BLOCK = 9932

Block Checking: DBA = 4204236, Block Type = KTB-managed data block

data header at 0x7fb110a7b25c

kdbchk: space available on commit is incorrect

tosp=5052 fsc=0 stb=0 avsp=4937

Block 9932 failed with check code 6111

--//解決方法就是assign kdbhtosp=kdbhavsp;sum apply就ok了.

--//我以前處理這個錯誤有點繁瑣.實際上設定fsc=0,設定提交標識為快速提交標識0x2,在執行assign kdbhtosp=kdbhavsp,

--//這樣記錄裡面lock標識不需要設定為0x0,這樣簡單許多.

$ cat scanb.sh

#! /bin/bash

# get dba of tailchk ,grep begin # line, save scan6.txt

# and then grep -v 0x5f5f06,save clearout.txt,other save notclearout.txt

grep dba scan3_bbed.txt | grep -v "^#" | cut -d" " -f4 | uniq | while read dba

do

echo -n $dba :

echo "p dba $dba offset 0 tailchk 8188"| rlbbed | grep "ub4 tailchk"

done >| scan6.txt

grep -v 0x5f5f06 scan6.txt >| clearout.txt

grep 0x5f5f06 scan6.txt >| notclearout.txt

# create modify ktbbhitl[N].ktbitflg , ktbbhitl[N]._ktbitun._ktbitfsc=0 and kdbhtosp=kdbhavsp of script.

cat clearout.txt | cut -d" " -f1 |while read dba

do

echo set dba $dba

echo -n "assign "

echo -n "assign "

echo "assign kdbhtosp=kdbhavsp"

echo sum apply dba $dba

done >| clearout_bbed.txt

# create modify ktbbhitl[N]._ktbitun._ktbitfsc=0 and kdbhtosp=kdbhavsp of script.

cat notclearout.txt | cut -d" " -f1 |while read dba

do

echo set dba $dba

# echo -n "assign "

echo -n "assign "

echo "assign kdbhtosp=kdbhavsp"

echo sum apply dba $dba

done >| notclearout_bbed.txt

--//執行以上指令碼:

$ . scanb.sh

$ grep "ktbbhitl[1].ktbitflg=" clearout_bbed.txt | grep -v 0x0

$ echo $?

1

--//說明這些塊都沒有打上提交標識.

$ head -5 clearout_bbed.txt

set dba 4204236

assign ktbbhitl[1].ktbitflg=0x0002

assign ktbbhitl[1]._ktbitun._ktbitfsc=0

assign kdbhtosp=kdbhavsp

sum apply dba 4204236

--//使用vim執行:%s/ktbitflg=0x0/ktbitflg=0x2/.也就是設定提交標識.注意檢查替換是否74行.

--//補充說明一下,我前面測試執行的是%s/=0x00/=0x20/,實際上提交標識僅僅佔半個位元組(4位),這樣寫有點問題,不過一般不會出現問題.

--//1塊修改255條以上的情況在這裡不會出現(至少對於這個表是如此).

$ head -5 clearout_bbed.txt

set dba 4204236

assign ktbbhitl[1].ktbitflg=0x2002

assign ktbbhitl[1]._ktbitun._ktbitfsc=0

assign kdbhtosp=kdbhavsp

sum apply dba 4204236

--//執行如下:

bbed parfile=/home/oracle/bbed/bbed.par cmdfile=/home/oracle/hrp430/bbed/clearout_bbed.txt

bbed parfile=/home/oracle/bbed/bbed.par cmdfile=/home/oracle/hrp430/bbed/notclearout_bbed.txt

$ dbv file=/mnt/ramdisk/book/system01.dbf

DBVERIFY: Release 11.2.0.4.0 - Production on Tue Feb 12 10:37:09 2019

DBVERIFY - Verification starting : FILE = /mnt/ramdisk/book/system01.dbf

DBVERIFY - Verification complete

Total Pages Examined : 97280

Total Pages Processed (Data) : 64316

Total Pages Failing (Data) : 0

Total Pages Processed (Index): 13442

Total Pages Failing (Index): 0

Total Pages Processed (Other): 4185

Total Pages Processed (Seg) : 1

Total Pages Failing (Seg) : 0

Total Pages Empty : 15337

Total Pages Marked Corrupt : 0

Total Pages Influx : 0

Total Pages Encrypted : 0

Highest block SCN : 393502590 (3.393502590)

--//現在OK了.

4.禁用sys.tab$的索引I_TAB1.

--//這樣恢復，索引與表存在不一致情況，要禁用sys.tab$的索引I_TAB1.

BBED> x /rnnc dba 1,523 *kdbr[9]

rowdata[1269] @4910

-------------

flag@4910: 0x2c (KDRHFL, KDRHFF, KDRHFH)

lock@4911: 0x01

cols@4912: 3

col 0[2] @4913: 33

col 1[2] @4916: 33

col 2[189] @4919: CREATE INDEX I_TAB1 ON TAB$(BOBJ#) PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE ( INITIAL 64K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483

645 PCTINCREASE 0 OBJNO 33 EXTENTS (FILE 1 BLOCK 312))

--//設定flag=3c,表示刪除.

BBED> assign /x dba 1,523 offset 4910= 0x3c

Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y

ub1 rowdata[0] @4910 0x3c

BBED> sum apply dba 1,523

Check value for File 1, Block 523:

current = 0x7e6b, required = 0x7e6b

BBED> verify dba 1,523

DBVERIFY - Verification starting

FILE = /mnt/ramdisk/book/system01.dbf

BLOCK = 523

Block Checking: DBA = 4194827, Block Type = KTB-managed data block

data header at 0x6eee44

kdbchk: the amount of space used is not equal to block size

used=4398 fsc=0 avsp=3525 dtl=8120

Block 523 failed with check code 6110

--//先不理會這個錯誤.

5.啟動資料庫看看:

SYS@book> startup pfile='/tmp/@.ora';

ORACLE instance started.

Total System Global Area 643084288 bytes

Fixed Size 2255872 bytes

Variable Size 205521920 bytes

Database Buffers 427819008 bytes

Redo Buffers 7487488 bytes

Database mounted.

Database opened.

SYS@book> shutdown immediate ;

Database closed.

Database dismounted.

ORACLE instance shut down.

SYS@book> startup open read only pfile='/tmp/book.ora'

ORACLE instance started.

Total System Global Area 643084288 bytes

Fixed Size 2255872 bytes

Variable Size 205521920 bytes

Database Buffers 427819008 bytes

Redo Buffers 7487488 bytes

Database mounted.

Database opened.

--//注/tmp/book.ora最好加入修改如下:

*._system_trig_enabled=false

*.job_queue_processes=0

SYS@book> select * from sys.tab$ minus select * from orachk001;

no rows selected

SYS@book> select * from orachk001 minus select * from sys.tab$;

no rows selected

--//OK,幾乎完美恢復.我執行如下select * from sh.sales;,順利讀出,沒有任何問題.

--//現在建立刪除表沒有任何問題.

SCOTT@book> create table t as select * from all_objects;

Table created.

SCOTT@book> drop table t purge ;

Table dropped.

6.剩下恢復tab$.索引I_TAB1,寫得有點長.另寫一篇修復索引的帖子,感覺這步很難,也許要先放一放.

--//最後說明一點,我的是測試環境,也許真實的環境更加複雜.我可能還遺漏一些細節...^_^.

[20190212]刪除tab$記錄的恢復3.txt

相關文章