年归档：2016

Solaris rm datafile recovery—利用句柄误删除数据文件恢复

发表于 2016 年 3 月 13 日 由 惜分飞

今天早上接到有客户恢复请求，他一不小心在solaris系统中使用rm -rf oradata命令把一个分区下面的所有数据文件全部删除了。现在不知道怎么办,请求我们给予支持.上去检查发现比较幸运,数据库没有crash,看来直接考虑使用句柄进行恢复

root@CNISORCLSVR # uname -a
SunOS CNISORCLSVR 5.9 Generic_112233-08 sun4u sparc SUNW,Sun-Fire-880
root@CNISORCLSVR # ps -ef|grep lgwr   
  oracle   597     1  0   Mar 05 ?       17:14 ora_lgwr_xifenfei
    root 28069 28043  0 18:51:17 pts/2    0:00 grep lgwr
root@CNISORCLSVR # ls -ltr
total 189348454
-r--r--r--   1 oracle   dba       657920 Apr 26  2002 12
c---------   1 root     sys       13, 12 Mar 27  2004 8
c---------   1 root     sys       13, 12 Mar 27  2004 10
-rw-r-----   0 oracle   dba      34359730176 Nov 12  2013 291
-rw-r-----   0 oracle   dba      1073750016 Nov 13  2013 293
D---------   1 root     root           0 Mar  5 19:31 11
-rw-r-----   1 oracle   dba         1758 Mar  5 22:04 9
-rw-rw----   1 oracle   dba           24 Mar  5 22:04 13
s---------   0 root     root           0 Mar  8 00:45 14
-rw-r-----   1 oracle   dba      1887444992 Mar 12 03:27 289
-rw-r-----   1 oracle   dba      943726592 Mar 12 11:17 290
-rw-r-----   0 oracle   dba      4294975488 Mar 13 00:09 292
-rw-r-----   0 oracle   dba      268443648 Mar 13 01:33 288
-rw-r-----   0 oracle   dba      536879104 Mar 13 01:33 279
-rw-r-----   1 oracle   dba      134225920 Mar 13 01:33 278
-rw-r-----   0 oracle   dba      134225920 Mar 13 01:33 269
-rw-r-----   1 oracle   dba      268443648 Mar 13 01:33 267
-rw-r-----   1 oracle   dba      148119552 Mar 13 01:33 266
-rw-r-----   1 oracle   dba      10493952 Mar 13 01:33 265
-rw-r-----   1 oracle   dba      26222592 Mar 13 01:33 264
-rw-r-----   1 oracle   dba      62922752 Mar 13 01:33 263
-rw-r-----   1 oracle   dba      20979712 Mar 13 01:33 262
-rw-r-----   0 oracle   dba      134225920 Mar 13 01:33 287
-rw-r-----   1 oracle   dba      209723392 Mar 13 01:33 285
-rw-r-----   0 oracle   dba      536879104 Mar 13 01:33 283
-rw-r-----   1 oracle   dba      67117056 Mar 13 01:33 282
-rw-r-----   0 oracle   dba      536879104 Mar 13 01:33 281
-rw-r-----   0 oracle   dba      536879104 Mar 13 01:33 280
-rw-r-----   0 oracle   dba      536879104 Mar 13 01:33 276
-rw-r-----   0 oracle   dba      1073750016 Mar 13 01:33 275
-rw-r-----   0 oracle   dba      2214600704 Mar 13 01:33 274
-rw-r-----   0 oracle   dba      134225920 Mar 13 01:33 273
-rw-r-----   0 oracle   dba      536879104 Mar 13 01:33 272
c---------   1 root     sys       13,  2 Mar 13 02:00 5
c---------   1 root     sys       13,  2 Mar 13 02:00 4
c---------   1 root     sys       13,  2 Mar 13 02:00 3
c---------   1 root     sys       13,  2 Mar 13 02:00 2
c---------   1 root     sys       13,  2 Mar 13 02:00 1
c---------   1 root     sys       13,  2 Mar 13 02:00 0
--w-------   1 oracle   dba      4640842 Mar 13 04:43 7
--w-------   1 oracle   dba      4640842 Mar 13 04:43 6
-rw-r-----   0 oracle   dba      1207967744 Mar 13 18:21 271
-rw-r-----   0 oracle   dba      15929974784 Mar 13 18:39 284
-rw-r-----   0 oracle   dba      134225920 Mar 13 18:45 277
-rw-r-----   0 oracle   dba      2122326016 Mar 13 18:46 286
-rw-r-----   0 oracle   dba      9261031424 Mar 13 18:47 270
-rw-r-----   0 oracle   dba      18253619200 Mar 13 18:47 268
-rw-r-----   1 oracle   dba      134225920 Mar 13 18:51 261
-rw-r-----   1 oracle   dba      524296192 Mar 13 18:51 260
-rw-r-----   1 oracle   dba      104858112 Mar 13 18:52 259
-rw-r-----   1 oracle   dba      1941504 Mar 13 18:52 258
-rw-r-----   1 oracle   dba      1941504 Mar 13 18:52 257
-rw-r-----   1 oracle   dba      1941504 Mar 13 18:52 256

SQL> select file#,name from v$datafile wehre name like '/disk%';

     FILE# NAME
---------- --------------------------------------------------
         9 /disk/oradata/xifenfei/xifenfei.dbf
        10 /disk/oradata/xifenfei/CSSN.dbf
        11 /disk/oradata/xifenfei/NCSSN.dbf
        12 /disk/oradata/xifenfei/CSIC_RDS.dbf
        13 /disk/oradata/xifenfei/CSIC_CSSN.dbf
        14 /disk/oradata/xifenfei/CNIS_I.dbf
        15 /disk/oradata/xifenfei/CNIS.dbf
        16 /disk/oradata/xifenfei/TRSWCM6_CSSN.dbf
        17 /disk/oradata/xifenfei/TRSWCM6_CSSN_PLUGINS.dbf
        18 /disk/oradata/xifenfei/DIGIREF.dbf
        20 /disk/oradata/xifenfei/TRSWCM.dbf
        21 /disk/oradata/xifenfei/TRSWCM52_NSLC.dbf
        22 /disk/oradata/xifenfei/TRSWCM52_PLUGINS_NSLC.dbf
        24 /disk/oradata/xifenfei/TRSWCM_PLUGINS.dbf
        25 /disk/oradata/xifenfei/CNIS_ALL.dbf
        27 /disk/oradata/xifenfei/undotbs01.dbf
        28 /disk/oradata/xifenfei/TRS_IDS02.dbf
        29 /disk/oradata/xifenfei/xdb02.dbf

在solaris中比较郁闷,虽然进入了fd目录,但是无法知道哪些文件句柄是删除,哪些是正常的,因此没有办法，只能使用lsof进一步分析

root@CNISORCLSVR # pkgadd -d lsof-4.80-sol9-sparc-local

The following packages are available:
  1  IBMlsof     lsof
                 (sparc) 4.80

Select package(s) you wish to process (or 'all' to process
all packages). (default: all) [?,??,q]: all

Processing package instance <IBMlsof> from </tmp/lsof-4.80-sol9-sparc-local>

lsof
(sparc) 4.80
Vic Abell
Using </usr/local> as the package base directory.
## Processing package information.
## Processing system information.
## Verifying disk space requirements.
## Checking for conflicts with packages already installed.

The following files are already installed on the system and are being
used by another package:
* /usr/local/bin <attribute change only>

* - conflict with a file which does not belong to any package.

Do you want to install these conflicting files [y,n,?,q] y
## Checking for setuid/setgid programs.

The following files are being installed with setuid and/or setgid
permissions:
 /usr/local/bin/lsof <setgid sys>
 /usr/local/bin/sparcv7/lsof <setgid sys>
 /usr/local/bin/sparcv9/lsof <setgid sys>

Do you want to install these as setuid/setgid files [y,n,?,q] y

Installing lsof as <IBMlsof>

## Installing part 1 of 1.
/usr/local/bin/lsof
/usr/local/bin/sparcv7/lsof
/usr/local/bin/sparcv9/lsof
/usr/local/doc/lsof/00.README.FIRST
/usr/local/doc/lsof/00CREDITS
/usr/local/doc/lsof/00DCACHE
/usr/local/doc/lsof/00DIALECTS
/usr/local/doc/lsof/00DIST
/usr/local/doc/lsof/00FAQ
/usr/local/doc/lsof/00LSOF-L
/usr/local/doc/lsof/00MANIFEST
/usr/local/doc/lsof/00PORTING
/usr/local/doc/lsof/00QUICKSTART
/usr/local/doc/lsof/00README
/usr/local/doc/lsof/00TEST
/usr/local/doc/lsof/00XCONFIG
/usr/local/doc/lsof/lsof.man
/usr/local/man/man8/lsof.8
[ verifying class <none> ]

Installation of <IBMlsof> was successful.

root@CNISORCLSVR # ./lsof -p 597
COMMAND PID   USER   FD   TYPE        DEVICE    SIZE/OFF   NODE NAME
oracle  597 oracle  cwd   VDIR          85,5        2048 106299 /export/home/oracle/app/product/9.2.0/dbs
oracle  597 oracle  txt   VREG          85,5    61272672   2332 /export/home/oracle/app/product/9.2.0/bin/oracle
…………
oracle  597 oracle  260u  VREG          85,5   524296192 106517 /export/home/oracle/oradata/xifenfei/system01.dbf
oracle  597 oracle  261u  VREG          85,5   134225920 106518 /export/home/oracle/oradata/xifenfei/undotbs01.dbf
…………
oracle  597 oracle  268u  VREG        118,70 18253619200  109 /disk (/dev/dsk/c2t600A0B800029CEFA0000036C491B270Bd0s6)
oracle  597 oracle  269u  VREG        118,70   134225920  110 /disk (/dev/dsk/c2t600A0B800029CEFA0000036C491B270Bd0s6)
oracle  597 oracle  270u  VREG        118,70  9261031424  111 /disk (/dev/dsk/c2t600A0B800029CEFA0000036C491B270Bd0s6)
…………
oracle  597 oracle  293u  VREG        118,70  1073750016   14 /disk (/dev/dsk/c2t600A0B800029CEFA0000036C491B270Bd0s6)

到这一步,基本上定位/disk部分是我们需要恢复的数据,从而可以定位到句柄,然后结合数据文件信息,直接使用cp命令恢复出来文件.然后数据库层面recover并且online.

cd /proc/597/fd
cp 269 /disk/oradata/cnisora2/CSSN.dbf
chown oracle:dba /disk/oradata/xifenfei/CSSN.dbf

SQL> recover datafile 10;
ORA-00283: 恢复会话因错误而取消
ORA-01124: 无法恢复数据文件 10 - 文件在使用中或在恢复中
ORA-01110: 数据文件 10: '/disk/oradata/xifenfei/CSSN.dbf'


SQL> alter database datafile 10 offline;

数据库已更改。

SQL> recover datafile 10;
完成介质恢复。
SQL> alter database datafile 10 online;

数据库已更改。

至此基本上恢复完成,万幸是数据库没有crash,遇到此类问题,千万不要盲目关闭数据库.另外数据库备份重于一切

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exp跳过某些表导出数据

发表于 2016 年 2 月 21 日 由 惜分飞

有一个需求，某个用户有很多张表，但是只能使用exp导出，而且想跳过其中某几张表，其他对象包括依赖关系都需要。针对这样的情况，通过分析exp的视图脚本，在exu10tabs视图进行修改，跳过某些表即可
修改exu10tabs视图
本测试为11.2.0.4版本，不同版本数据库，可能视图名称和语句有一定出入，请别照搬,exu10tabs在$ORACLE_HOME/rdbms/admin/catexp.sql中

CREATE OR REPLACE VIEW exu10tabs (
                objid, dobjid, name, owner, ownerid, tablespace, tsno, fileno,
                blockno, audit$, comment$, clusterflag, mtime, modified, tabno,
                pctfree$, pctused$, initrans, maxtrans, degree, instances,
                cache, tempflags, property, deflog, tsdeflog, roid, recpblk,
                secondaryobj, rowcnt, blkcnt, avgrlen, tflags, trigflag,
                objstatus, xdbool)
      AS                                                      /* Heap tables */
        SELECT
                o$.obj#, o$.dataobj#, o$.name, u$.name, o$.owner#, ts$.name,
                t$.ts#, t$.file#, t$.block#, t$.audit$, c$.comment$,
                NVL(t$.bobj#, 0), o$.mtime,
                DECODE(BITAND(t$.flags, 1), 1, 1, 0), NVL(t$.tab#, 0),
                MOD(t$.pctfree$, 100), t$.pctused$, t$.initrans, t$.maxtrans,
                NVL(t$.degree, 1), NVL(t$.instances, 1),
                DECODE(BITAND(t$.flags, 8), 8, 1, 0),
                MOD(TRUNC(o$.flags / 2), 2), t$.property,
                DECODE(BITAND(t$.flags, 32), 32, 1, 0), ts$.dflogging, o$.oid$,
                t$.spare1, DECODE(BITAND(o$.flags, 16), 16, 1, 0),
                NVL(t$.rowcnt, -1), NVL(t$.blkcnt, -1), NVL(t$.avgrln, -1),
                t$.flags, t$.trigflag, o$.status,
                (SELECT COUNT(*)
                    FROM sys.opqtype$ opq$
                    WHERE opq$.obj# = o$.obj# AND
                          BITAND(opq$.flags, 32) = 32 )
        FROM    sys.tab$ t$, sys.obj$ o$, sys.ts$ ts$, sys.user$ u$,
                sys.com$ c$
        WHERE   t$.obj# = o$.obj# AND
                t$.ts# = ts$.ts# AND
                u$.user# = o$.owner# AND
                o$.obj# = c$.obj#(+) AND
                c$.col#(+) IS NULL AND
                BITAND(o$.flags,128) != 128 AND      /* Skip recycle bin */
                BITAND(t$.property, 64+512) = 0 AND /*skip IOT and ovflw segs*/
                BITAND(t$.flags, 536870912) = 0    /* skip IOT mapping table */
                and o$.name not in('T_XIFENFEI','T_ORASOS')  --增加需要跳过表
      UNION ALL                                         /* Index-only tables */
        SELECT  o$.obj#, o$.dataobj#, o$.name, u$.name, o$.owner#, ts$.name,
                i$.ts#, t$.file#, t$.block#, t$.audit$, c$.comment$,
                NVL(t$.bobj#, 0), o$.mtime,
                DECODE(BITAND(t$.flags, 1), 1, 1, 0),
                NVL(t$.tab#, 0), 0, 0, 0, 0,
                NVL(t$.degree, 1), NVL(t$.instances, 1),
                DECODE(BITAND(t$.flags, 8), 8, 1, 0),
                MOD(TRUNC(o$.flags / 2), 2), t$.property,
                DECODE(BITAND(t$.flags, 32), 32, 1, 0), ts$.dflogging, o$.oid$,
                t$.spare1, DECODE(BITAND(o$.flags, 16), 16, 1, 0),
                NVL(t$.rowcnt, -1), NVL(t$.blkcnt, -1), NVL(t$.avgrln, -1),
                t$.flags, t$.trigflag, o$.status,
                (SELECT COUNT(*)
                    FROM sys.opqtype$ opq$
                    WHERE opq$.obj# = o$.obj# AND
                          BITAND(opq$.flags, 32) = 32 )
        FROM    sys.tab$ t$, sys.obj$ o$, sys.ts$ ts$, sys.user$ u$,
                sys.com$ c$, sys.ind$ i$
        WHERE   t$.obj# = o$.obj# AND
                u$.user# = o$.owner# AND
                o$.obj# = c$.obj#(+) AND
                c$.col#(+) IS NULL AND
                BITAND(o$.flags,128) != 128 AND      /* Skip recycle bin */
                BITAND(t$.property, 64+512) = 64 AND /* IOT, but not overflow*/
                t$.pctused$ = i$.obj# AND/* For IOTs, pctused has index obj# */
                i$.ts# = ts$.ts#

准备测试条件
创建用户xifenfei,在该用户下面创建四个表,其中有t_xifenfei和t_orasos需要跳过

[oracle@localhost ~]$ ss

SQL*Plus: Release 11.2.0.4.0 Production on Sun Feb 21 21:38:18 2016

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> create user xifenfei identified by oracle;

User created.

SQL> grant dba to xifenfei;

Grant succeeded.

SQL> conn xifenfei/oracle
Connected.
SQL> create table t_xifenfei as select * from dba_tables;

Table created.

SQL> create table t_xifenfei_exp as select * from dba_tables;

Table created.

SQL> create table t_orasos as select * from dual;

Table created.

SQL> create table xff_t_orasos as select * from dual;

Table created.

SQL> select * from tab;

TNAME                          TABTYPE  CLUSTERID
------------------------------ ------- ----------
T_ORASOS                       TABLE
T_XIFENFEI                     TABLE
T_XIFENFEI_EXP                 TABLE
XFF_T_ORASOS                   TABLE

exp导出数据测试

[oracle@localhost ~]$ exp xifenfei/oracle owner=xifenfei file=/tmp/www.xifenfei.com.dmp

Export: Release 11.2.0.4.0 - Production on Sun Feb 21 21:40:23 2016

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 US7ASCII character set and AL16UTF16 NCHAR character set
server uses ZHS16GBK character set (possible charset conversion)

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_XIFENFEI_EXP       3374 rows exported
. . exporting table                   XFF_T_ORASOS          1 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.

通过测试，我们发现，在xifenfei用户中有四个表，按照我们的设想跳过了事先配置的表.通过修改exu10tabs脚本，完美实现exp跳部分表

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How to Recreate The AWR ( AUTOMATIC WORKLOAD ) Repository—重建awr

发表于 2016 年 2 月 21 日 由 惜分飞

由于某种原因，比如数据异常断电，导致awr数据严重不一致，awr部分表损坏等情况，需要重建awr，可以参考如下步骤进行重建,本文主要针对目前主流的10g和11g版本数据库,12c未进行测试
停止awr自动收集信息
方法1:参数调整

sqlplus /nolog
connect / as sysdba
create pfile='/tmp/pfile.xifenfei' from spfile;
alter system set shared_pool_size = 200m scope = spfile;
alter system set db_cache_size = 300m scope = spfile;
alter system set java_pool_size = 100m scope = spfile;
alter system set large_pool_size = 50m scope = spfile;
--内存值可以根据实际情况调整
alter system reset sga_target  scope = spfile sid='*';
alter system set statistics_level=basic scope=spfile;
--11G
alter system reset memory_target scope= spfile sid='*';
alter system reset memory_max_target scope=spfile sid='*';
alter system set sga_target=0 scope= spfile;
alter system set memory_target=0 scope= spfile;
--RAC
alter system set cluster_database = false scope = spfile;

方法2：使用包/参数

For 10g, you need to download the package DBMS_AWR.DISABLE_AWR available at Note 436386.1 Package
for disabling AWR without a Diagnostic Pack license in Oracle To
install, run the package as SYS from SQL*Plus:
@dbmsnoawr.plb
To execute the package, use the command:
begin dbms_awr.disable_awr(); end;

For 11g, use the parameter control_management_pack_access to disable it
alter system set control_management_pack_access = NONE scope = both;

方法1:需要重启数据库
如果选择方法2,忽略此步骤

sqlplus /nolog
connect / as sysdba
shutdown immediate
startup restrict

删除AWR

start ?/rdbms/admin/catnoawr.sql  
--由于Bug 5376177在10.2.0.1/2中可能没有catnoawr.sql文件，可以从10.2.0.3/4中拷贝过来

alter system flush shared_pool;

--验证awr数据数据删除情况
select table_name from dba_tables where table_name like 'WRM$_%' or table_name like 'WRH$_%';
如果有记录存在，使用drop table 语句删除

创建AWR

start ?/rdbms/admin/catawrtb.sql
start ?/rdbms/admin/utlrp.sql
--11G
start ?/rdbms/admin/execsvrm.sql
alter package dbms_swrf_internal compile;
alter package dbms_swrf_internal compile body;
start ?/rdbms/admin/execsvrm.sql

重启数据库
方法1对应处理

create spfile from pfile='/tmp/pfile.xifenfei';
shutdown immediate
startup

方法2对应处理

--11g
alter system set control_management_pack_access = 'DIAGNOSTIC+TUNING' scope = both;
shutdown immediate
startup

--10g
@dbmsnoawr.plb 
begin dbms_awr.enable_awr();end;

处理无效对象

spool objects.lst
set pagesize500
set linesize 100
select substr(comp_name,1,40) comp_name, status, substr(version,1,10) version
from dba_registry
order by comp_name;

select substr(object_name,1,40) object_name,substr(owner,1,15) owner,object_type
from dba_objects
where status='INVALID' order by owner,object_type;

select owner,object_type,count(*)
from dba_objects
where status='INVALID'
group by owner,object_type order by owner,object_type ;
spool off

alter package <schema name>.<package_name> compile;
alter package <schema name>.<package_name> compile body;
alter view <schema name>.<view_name> compile;
alter trigger <schema).<trigger_name> compile;

测试AWR

--收集快照
exec dbms_workload_repository.create_snapshot;
--wait for 5 min
exec dbms_workload_repository.create_snapshot;

--生成awr报告
start $ORACLE_HOME/rdbms/admin/awrrpt.sql

注意BUG
Bug:17063159 CATNOAWR.SQL NOT DROPPING ALL AWR TABLES
Bug:10211252 ‘DROP TABLE WRM$_WR_USAGE MISSING IN CATNOAWR.SQL
Bug:9150463 CANNOT RECREATE THE AWR ON R11.1

参考文档
How to Recreate The AWR ( AUTOMATIC WORKLOAD ) Repository ? (Doc ID 782974.1)
How to Recreate Tables in the SYSAUX Tablespace (Doc ID 333665.1)

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