分类目录归档：Oracle ASM

通过参考kamus的Where is the backup of ASM disk header block,发现从10.2.0.5开始的asm确实存在自动备份asm disk header功能.有了这个功能对于那些不备份asm disk header的同学,提供了一层保证,也增加了asm的安全性.
对于10.2.0.5.0以及以后版本，不管au size是多少,asm disk header自动备份存储的位置是第2个au的倒数第2个block.
计算方法:AU中包含的block num[AU_SIZE/block_size]*2-2[因为从第一个块从0计数],通过该方法计算结论为:
1M AU在510
2M AU在1022
4M AU在2046
8M AU在4094
16M AU在8190
32M AU在16382
64M AU在32766
1.对比备份asm disk header

SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - Prod
PL/SQL Release 10.2.0.5.0 - Production
CORE    10.2.0.5.0      Production
TNS for Linux: Version 10.2.0.5.0 - Production
NLSRTL Version 10.2.0.5.0 - Production

SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') "xifenfei.com"  from dual;

xifenfei.com
-------------------
2012-06-17 09:41:19

SQL>  select group_number,DISK_NUMBER,PATH,HEADER_STATUS 
   2  from v$asm_disk where group_number<>0;

GROUP_NUMBER DISK_NUMBER PATH            HEADER_STATU
------------ ----------- --------------- ------------
           1           1 /dev/raw/raw2   MEMBER
           1           0 /dev/raw/raw1   MEMBER

SQL> select group_number,name,BLOCK_SIZE,ALLOCATION_UNIT_SIZE from v$asm_diskgroup;

GROUP_NUMBER NAME                           BLOCK_SIZE ALLOCATION_UNIT_SIZE
------------ ------------------------------ ---------- --------------------
           1 DATA                                 4096              1048576

rac1->  kfed read /dev/raw/raw1 blknum=510|>/tmp/xifenfei.510
rac1->  kfed read /dev/raw/raw1 blknum=0|>/tmp/xifenfei.0
rac1-> ll /tmp/xifenfei*
-rw-r--r--  1 oracle oinstall 6606 Jun 14 04:11 /tmp/xifenfei.0
-rw-r--r--  1 oracle oinstall 6606 Jun 14 04:12 /tmp/xifenfei.510
rac1-> diff /tmp/xifenfei.510 /tmp/xifenfei.0
--通过对比发现两者无不同记录返回,证明他们记录内容完全相同

2.尝试破坏asm disk header

rac1-> dd if=/dev/zero of=/dev/raw/raw1 bs=4096 count=1
1+0 records in
1+0 records out
rac1->  kfed read /dev/raw/raw1 blknum=0
kfbh.endian:                          0 ; 0x000: 0x00
kfbh.hard:                            0 ; 0x001: 0x00
kfbh.type:                            0 ; 0x002: KFBTYP_INVALID
kfbh.datfmt:                          0 ; 0x003: 0x00
kfbh.block.blk:                       0 ; 0x004: T=0 NUMB=0x0
kfbh.block.obj:                       0 ; 0x008: TYPE=0x0 NUMB=0x0
kfbh.check:                           0 ; 0x00c: 0x00000000
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000

SQL> select group_number,DISK_NUMBER,PATH,HEADER_STATUS 
   2 from v$asm_disk where group_number<>0;

GROUP_NUMBER DISK_NUMBER PATH            HEADER_STATU
------------ ----------- --------------- ------------
           1           1 /dev/raw/raw2   MEMBER
           1           0 /dev/raw/raw1   CANDIDATE

SQL> alter diskgroup  data dismount;

Diskgroup altered.

SQL> alter diskgroup  data mount;
alter diskgroup  data mount
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15063: ASM discovered an insufficient number of disks for diskgroup "DATA"

3.使用kfed repair修改损坏asm disk header

rac1-> kfed  repair '/dev/raw/raw1'
rac1->  kfed read /dev/raw/raw1 blknum=0
kfbh.endian:                          1 ; 0x000: 0x01
kfbh.hard:                          130 ; 0x001: 0x82
kfbh.type:                            1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt:                          1 ; 0x003: 0x01
kfbh.block.blk:                       0 ; 0x004: T=0 NUMB=0x0
kfbh.block.obj:              2147483648 ; 0x008: TYPE=0x8 NUMB=0x0
kfbh.check:                   883602253 ; 0x00c: 0x34aab34d
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
…………

SQL> alter diskgroup  data mount;

Diskgroup altered.

4.使用kfed merge恢复asm disk header

rac1-> dd if=/dev/zero of=/dev/raw/raw1 bs=4096 count=1
1+0 records in
1+0 records out
rac1->  kfed read /dev/raw/raw1 blknum=0
kfbh.endian:                          0 ; 0x000: 0x00
kfbh.hard:                            0 ; 0x001: 0x00
kfbh.type:                            0 ; 0x002: KFBTYP_INVALID
kfbh.datfmt:                          0 ; 0x003: 0x00
kfbh.block.blk:                       0 ; 0x004: T=0 NUMB=0x0
kfbh.block.obj:                       0 ; 0x008: TYPE=0x0 NUMB=0x0
kfbh.check:                           0 ; 0x00c: 0x00000000
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000

SQL> alter diskgroup  data dismount;

Diskgroup altered.

SQL> alter diskgroup  data mount;
alter diskgroup  data mount
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15063: ASM discovered an insufficient number of disks for diskgroup "DATA"

rac1->  kfed merge /dev/raw/raw1 /tmp/xifenfei.510

SQL> alter diskgroup  data mount;

Diskgroup altered.

通过试验证明在10.2.0.5及其以后版本中,对于备份的asm disk header我们可以通过使用kfed repair和kfed merge来恢复.

1.检查Oracle XML Database组件

SQL> select comp_name, status, version from DBA_REGISTRY where comp_name='Oracle XML Database';

COMP_NAME                 STATUS                 VERSION
------------------------- ---------------------- ------------------------------
Oracle XML Database       VALID                  11.2.0.3.0

SQL> select count(*) from dba_objects where owner='XDB' and status='INVALID';

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

2.配置xdb的ftp和http

[oracle@rac1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Tue May 1 12:05:27 2012

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

SQL> execute dbms_xdb.sethttpport(8080);

PL/SQL procedure successfully completed.

SQL> execute dbms_xdb.setftpport(2100);

PL/SQL procedure successfully completed.

SQL> commit;

Commit complete.

SQL> select dbms_xdb.GETFTPPORT() from dual;

DBMS_XDB.GETFTPPORT()
---------------------
                 2100

SQL> select dbms_xdb.GETHTTPPORT() from dual;

DBMS_XDB.GETHTTPPORT()
----------------------
                  8080
--根据你的需求,可以选择一个即可

SQL> show parameter dispatchers;

NAME                                 TYPE        VALUE
------------------------------------ ----------- -------------------------------
dispatchers                          string      (PROTOCOL=TCP) (SERVICE=XFFXDB)
--dispatchers参数会自动配置,这里需要说明,MOS中说的sidxdb是不恰当的,我这里是db_namexdb
--因为我这里是rac,sid为XFF1,总之相信自动配置

3.查看监听

[oracle@rac1 ~]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 01-MAY-2012 12:09:14

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date                01-MAY-2012 11:51:13
Uptime                    0 days 0 hr. 18 min. 1 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File         /u01/app/gridbase/diag/tnslsnr/rac1/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.31)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.33)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=8080))(Presentation=HTTP)(Session=RAW))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=2100))(Presentation=FTP)(Session=RAW))
Services Summary...
Service "+ASM" has 1 instance(s).
  Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "XFF" has 1 instance(s).
  Instance "XFF1", status READY, has 1 handler(s) for this service...
Service "XFFXDB" has 1 instance(s).
  Instance "XFF1", status READY, has 1 handler(s) for this service...
The command completed successfully

--以下两条监听是自动增加上去，如果没有自动增加，需要手工增加并且重启或者重新加载监听
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=8080))(Presentation=HTTP)(Session=RAW))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=2100))(Presentation=FTP)(Session=RAW))

4.ftp基本操作

[oracle@rac1 ~]$ ftp -n
ftp> open rac1 2100
Connected to rac1.
220- rac1 
Unauthorised use of this FTP server is prohibited and may be subject to civil and criminal prosecution.
220 rac1 FTP Server (Oracle XML DB/Oracle Database) ready.
530  Please login with USER and PASS.
530  Please login with USER and PASS.
KERBEROS_V4 rejected as an authentication type
ftp> user system xifenfei
331 pass required for SYSTEM
230 SYSTEM logged in
ftp> ls
227 Entering Passive Mode (192,168,1,31,181,5)
150 ASCII Data Connection
drw-r--r--   2 SYS      oracle         0 SEP 18 17:49 OLAP_XDS
drw-r--r--   2 SYS      oracle         0 SEP 18 17:47 home
drw-r--r--   2 SYS      oracle         0 SEP 18 18:02 images
drw-r--r--   2 SYS      oracle         0 SEP 18 17:49 olap_data_security
drw-r--r--   2 SYS      oracle         0 SEP 18 17:43 public
drw-r--r--   2 SYS      oracle         0 SEP 18 17:44 sys
-rw-r--r--   1 SYS      oracle         0 MAY 01 04:06 xdbconfig.xml
drw-r--r--   2 SYS      oracle         0 SEP 18 17:49 xds
226 ASCII Transfer Complete
ftp> cd sys
250 CWD Command successful
ftp> cd asm
250 CWD Command successful
ftp> ls
227 Entering Passive Mode (192,168,1,31,98,133)
150 ASCII Data Connection
drw-r--r--   2 SYS      oracle         0 MAY 01 04:14 XIFENFEI
drw-r--r--   2 SYS      oracle         0 MAY 01 04:14 DATA
226 ASCII Transfer Complete
ftp> cd xifenfei
250 CWD Command successful
ftp> ls
227 Entering Passive Mode (192,168,1,31,151,70)
150 ASCII Data Connection
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 XFF
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 ASM
226 ASCII Transfer Complete
ftp> cd xff
250 CWD Command successful
ftp> ls
227 Entering Passive Mode (192,168,1,31,100,14)
150 ASCII Data Connection
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 DATAFILE
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 CONTROLFILE
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 ONLINELOG
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 TEMPFILE
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 PARAMETERFILE
-rw-r--r--   1 SYS      oracle      3584 MAY 01 04:15 spfileXFF.ora
226 ASCII Transfer Complete
ftp> cd xff/datafile
250 CWD Command successful
ftp> ls
227 Entering Passive Mode (192,168,1,31,30,63)
150 ASCII Data Connection
-rw-r--r--   1 SYS      oracle  744497152 MAY 01 04:20 SYSTEM.256.776961315
-rw-r--r--   1 SYS      oracle  618668032 MAY 01 04:20 SYSAUX.257.776961315
-rw-r--r--   1 SYS      oracle  83894272 MAY 01 04:20 UNDOTBS1.258.776961317
-rw-r--r--   1 SYS      oracle   6291456 MAY 01 04:20 user_dd.dbf
-rw-r--r--   1 SYS      oracle  26222592 MAY 01 04:20 UNDOTBS2.264.776961693
-rw-r--r--   1 SYS      oracle  157294592 MAY 01 04:20 xifenfei01.dbf
226 ASCII Transfer Complete
ftp> get xifenfei01.dbf
local: xifenfei01.dbf remote: xifenfei01.dbf
227 Entering Passive Mode (192,168,1,31,143,34)
150 ASCII Data Connection
550- Error Response 
ORA-31198: Mismatch in number of bytes transferred due to non-binary mode
550 End Error Response 
270340 bytes received in 0.053 seconds (5e+03 Kbytes/s)
ftp> binary
200  Type set to I.
ftp> get xifenfei01.dbf
local: xifenfei01.dbf remote: xifenfei01.dbf
227 Entering Passive Mode (192,168,1,31,9,112)
150 BIN Data Connection
226 BIN Transfer Complete
157294592 bytes received in 14 seconds (1.1e+04 Kbytes/s)
--主要需要设置为二进制传输模式,默认是ASCII方式的,可能会报错
ftp> quit
221 QUIT Goodbye.

这篇文章主要参考How to configure XDB for using ftp and http protocols with ASM [ID 357714.1],但是在自己试验过程中,发现文档中有些地方不太合适,这里做个补充说明：
1.ftp服务端不需要启动(这里只是用到了操作系统的ftp客户端功能,如果使用其他客户端工具,连操作系统客户端都省了)
2.dispatchers 中的SERVICE=XDB不准确,系统自动配置的XDB亦可以正常工作,更相信数据库自动配置
3.ftp和http两个功能,只需要配置一个即可(选择你需要的)
4.下图展示的是通过http方式访问结果(system用户登录)