DB2中表损坏问题和db2dart工具的使用

时间 2020-05-11

标签 db2 中表损坏问题 db2dart dart 工具使用繁體版

原文原文链接

这几天须要从一个备份集中恢复一个数据库，恢复后发现问题不少，自己这个备份中可能有存在不完整的log，处理完一个个问题后发现仍是有表损坏，在db2diag中其日志信息以下，却是很清楚的看到损坏对象：DB2数据库坏块代码web

<code type="section" width="100%">sql

<heading refname=Listing 2" type="code">常规表的DDL语句示例</heading>数据库

2014-04-27-05.06.42.071142-240 I36137A535 LEVEL: Severe PID : 14680376 TID : 13881 PROC : db2sysc 0 INSTANCE: db2rilo NODE : 000 DB : WEB APPHDL : 0-40 APPID: 9.32.130.62.37608.140427090600 AUTHID : DEVPRCBK EDUID : 13881 EDUNAME: db2agent (WEB) 0 FUNCTION: DB2 UDB, data management, sqldFetchDirect, probe:4603 RETCODE : ZRC=0x87040001=-2029780991=SQLD_BADPAGE "Bad Data Page" DIA8500C A data file error has occurred, record id is "". 2014-04-27-05.06.42.071901-240 I36673A555 LEVEL: Severe PID : 14680376 TID : 13881 PROC : db2sysc 0 INSTANCE: db2rilo NODE : 000 DB : WEB APPHDL : 0-40 APPID: 9.32.130.62.37608.140427090600 AUTHID : DEVPRCBK EDUID : 13881 EDUNAME: db2agent (WEB) 0 FUNCTION: DB2 UDB, trace services, sqlt_logerr_string (secondary logging fu, probe:0 MESSAGE : TABLESPACE ATTRIBUTES: DATA #1 : String, 73 bytes Tablespace Seed = 5, Bufferpool ID = 7, Extent Size = 16, Page Size = 8k 2014-04-27-05.06.42.072336-240 I37229A535 LEVEL: Severe PID : 14680376 TID : 13881 PROC : db2sysc 0 INSTANCE: db2rilo NODE : 000 DB : WEB APPHDL : 0-40 APPID: 9.32.130.62.37608.140427090600 AUTHID : DEVPRCBK EDUID : 13881 EDUNAME: db2agent (WEB) 0 FUNCTION: DB2 UDB, trace services, sqlt_logerr_string (secondary logging fu, probe:0 MESSAGE : PAGE OBJECT IDENTIFIERS: DATA #1 : String, 51 bytes Tablespace ID = 5, Object ID = 72, Object Type = 0 2014-04-27-05.06.42.072612-240 I37765A511 LEVEL: Severe PID : 14680376 TID : 13881 PROC : db2sysc 0 INSTANCE: db2rilo NODE : 000 DB : WEB APPHDL : 0-40 APPID: 9.32.130.62.37608.140427090600 AUTHID : DEVPRCBK EDUID : 13881 EDUNAME: db2agent (WEB) 0 FUNCTION: DB2 UDB, trace services, sqlt_logerr_string (secondary logging fu, probe:0 MESSAGE : PAGE NUMBERS: DATA #1 : String, 38 bytes Obj Page = 15430, Pool Page = 1061398 2014-04-27-05.06.42.072878-240 I38277A485 LEVEL: Severe PID : 14680376 TID : 13881 PROC : db2sysc 0 INSTANCE: db2rilo NODE : 000 DB : WEB APPHDL : 0-40 APPID: 9.32.130.62.37608.140427090600 AUTHID : DEVPRCBK EDUID : 13881 EDUNAME: db2agent (WEB) 0 FUNCTION: DB2 UDB, trace services, sqlt_logerr_string (secondary logging fu, probe:0 MESSAGE : lifeLSN: DATA #1 : String, 17 bytes 000000003CA9A178app

</code>ide

分析：对于DB2中数据库出现坏块问题，若是没有使用该表时候，并不会影响数据库的正常使用，一旦有访问该表的会话，那么会形成整个数据库实例宕机，从而影响业务的应用，因此问题比较棘手，对于此类问题没有很好的解决，惟独能够经过db2dart离线方式将表中的数据导出，而且将表mark为unvaliable后重建便可，db2dart只开放了部分免费功能，如标记索引，导出数据，表空间高水位线处理及一些查看功能，可是对于标记表失效须要客服提供密码才可使用。其实根据上面提供的信息已经比较彻底了，只须要找出是那张表表便可。ui

Tablespace ID = 5, Object ID = 72, Object Type = 0
this

其中tablespace id便是坏块所在表的表空间ID，object id对应出现坏块的对象ID，能够是表索引或LOB，object type表明损坏对象的类型，0表示表，1表示索引，还有其余的LOB之类的吧，不过不多见，上面可见损坏的是表，因此因此根据信息就能够经过syscat.tables查看损坏的表名称：spa

db2 select tabschema,tabname from syscat.tables where tableid=72 and tbspaceid=5

TABSCHEMA TABNAME
-----------------------------------------------------------------
WWPP2 WWIDE_FNSHD_PART
日志

而后须要停掉实例直接db2stop force便可
db2dart web /MT /tsi 5 /oi 72code

Please enter Table ID or name, tablespace ID, and password:
72,5, ********（需IBM 800提供密码）

Mark table phase start.
Set drop-pending (unavailable) state for table objects.
Set state for DAT object 1190 tablespace 8.
Modification for page (obj rel 0, pool rel 982568) of pool ID (5) obj ID (72), written out to disk successfully.
Modification written out successfully.
Mark table phase end.

The requested DB2DART processing has completed successfully!
Complete DB2DART report found in:
/db2_src/db2rilo/sqllib/db2dump/DART0001/web.RPT

这样将表标记为unvaliable了，这时仍是能够经过db2look将表结构导出来的，倒出来后直接Drop 掉这个表重建便可。

若是是索引损坏，就能够经过object id和tablespace id在视图syscat.indexes中查到索引的ID号，IID,不一样的是标记索引是是个免费功能，参数使用MI，过程大体至关，标记失效后的索引不须要通过drop，根据这个参数设置状况：

Index re-creation time and redo index build (INDEXREC) = SYSTEM (RESTART)

失效的索引会自动重建。

相似的db2dart还有离线导出表中数据的功能，也为无偿使用，相对比较简单，经过以下SQL找到相关须要的对象

select rtrim(tabschema)||'.'||tabname,TABLEID||','||TBSPACEID||','||1||','||fpages from syscat.tables where tabschema='EBIZ1' and tabname='TEST'

而后使用ddel便可将怀表中的数据导出格式为DEL的数据文件

db2dart web /DDEL /OI 134 /TSI 6 /PS 1 /NP 100 /V Y /RPT /db2_backup/db2rilo/WEB/db2dart /RPTN WEB_QUOTE

固然整个过程须要交互进行。

至于各个选项表明什么意思，能够经过以下方式查看：

$ db2dart ____________________________________________________________________ _____ D B 2 D A R T _____ Database Analysis Tool I B M DB2 6000 The DB2DART Tool is a utility for the analysis of databases, tablespaces, and tables. DART's primary function is to examine databases for their architectural correctness, and to report any encountered errors. ____________________________________________________________________ ___________________________________________________________________________DB2 V9.7 DB2DART HELP db2dart - Database Analysis Tool The db2dart command analyses databases, table spaces and tables. The primary function of this command is to examine databases for architectural correctness, and to report any encountered errors. Requirements: db2dart must be run with no users connected to the database. Syntax: db2dart <database name> [action] [options ...] ('db2dart /H' for extended help) Command parameters: /H Displays this help. (press <enter> for more text) /H Inspect actions: /DB (default) Inspects entire database. /T Inspects one or more tables. (See notes 1, 3, 13) /TSF Inspects only the table space files and containers. /TSC Inspects the table space constructs of one or more table spaces (but does not inspect tables). /TS Inspects one or more table spaces and their tables. (/TSC and /TS require a table space ID or a list of table space IDs to be specified. See notes 1 and 2.) /ATSC Inspects constructs of all table spaces (but not their tables). Data format actions: /DD Dumps formatted table data. (See notes 1, 4, 13, 15) /DM Dumps formatted block map data. (See notes 1, 4, 13, 15) /DI Dumps formatted index data. (See notes 1, 4, 12, 15) /DXA Dumps formatted xda data in ASCII. (See notes 1, 4, 13, 15) /DXH Dumps formatted xda data in Hex. (See notes 1, 4, 13, 15) /DP Dumps pages in hex format. (See notes 1, 6, 13) /DTSF Dumps formatted table space file information. /DEMP Dumps formatted EMP information for a DMS table. (See notes 1, 3, 13) /DDEL Dumps formatted table data in delimited ASCII format. (See note 13, 15) /DHWM Dumps high water mark information. (See notes 1, 2, 14) /LHWM Suggests ways of lowering high water mark. (See notes 1, 7, 14) (press <enter> for more text) /DDEL Input value options: /OI object-id Specifies the object ID. For the /T, a comma-separated list of up to 64 object IDs can be specified. If the corresponding /TSI parameter contains more than one input ID, only the first ID is used. Duplicate IDs are skipped. Logical ID can be specified for the /T parameter. /TN table-name Specifies the table name. /TSI tablespace-id Specifies the table space ID. For the /TS and /TSC, a comma-separated list of up to 64 physical table space IDs can be specified. Duplicate IDs are skipped. /ROW sum Identifies whether L/F descriptors, LOB descriptors and control information should be checked. (1) Checks control information in rows. (2) Checks long field and LOB descriptors. (see note 8) /PS number Specifies the page number to start with. (When using the /DP action or working with a pool-relative tablespace, you may suffix the page number with 'p' for pool relative.) /NP number Specifies the number of pages. /V Y/N Specifies whether or not to use verbose option. (Y) Verbose. (N) No verbose./RPT path The path to place report output file (optional). /RPTN file-name The name of the report file (optional). /SCR Y/M/N Specifies the type of screen output, if any. (Y) Produces normal screen output. (M) Produces minimal screen output. (N) Produces no screen output. /RPTF Y/E/N Specifies the type of report file output, if any. (Y) Produces normal output. (E) Sends only error information to report file. (N) Produces no report file output. /ERR Y/N/E Specifies the type of log to produce in DART.INF, if any. (Y) Produces a normal log in DART.INF file. (default) (N) Minimizes output to log DART.INF file. (E) Minimizes DART.INF file and screen output. Only error information is logged./WHAT DBBP OFF/ON Specifies the database backup pending state. (OFF) Off state. (ON) On state. /QCK [sum] Specifies a quick option. The default /QCK value is 1, the same as when you specify /QCK 1. (see note 8) Valid values are: (1) Applies only to the /DB, /T, and /TS actions. Inspects only page 0 of the DAT objects and partially inspects the index objects (does not inspect BMP, LOB, LF objects and does not traverse the entirety of the DAT or INX objects). (2) Applies only to the /DB, /T, /TS, /DD, /DI, /DM, /DEMP, /DDEL, /DXA, and /DXH actions. Skips system catalog table look up on non-partitioned database environments and on the catalog partition of partitioned database environments. This option has no effect on non-catalog partitions of partitioned database environments. Not applies to the applicable actions above when /TN with a table name is specified, or if /OI and /TSI with logical IDs are specified. (4) Applies only to the /T, /TS, and /TSC actions. For /TS, /TSC, skips inspection of the special system catalog tables. For /T, skips inspection of the system catalog table space constructs. (8) Applies only to /T and /TS actions. For /T, skips inspection of all container files. For /TS, inspects only container files that are associated with the specified table space. /TYP Specifies the type of object. Valid values are: (DAT) Object type is DAT. (INX) Object type is INDEX. (BKM) Object type is BMP. (press <enter> for more text)