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hosts无效内容未注释导致RAC安装OUI的Network Interface Usage报INS-41112
安装AIX RAC过程中,在OUI的Network Interface Usage报INS-41112,从而使得安装无法继续
错误记录摘要
Cause - Installer has detected that network interface en6 does not maintain connectivity on all cluster nodes. Action - Ensure that the chosen interface has been configured across all cluster nodes. Additional Information: Summary of the failed nodes xifenfei01 - PRVF-4190 : Verification of the hosts config file failed
hosts解析配置
10.70.89.68 xifenfei01 10.70.89.69 xifenfei01-vip 10.70.89.100 xifenfei01-priv 10.70.89.71 xifenfei02 10.70.89.72 xifenfei02-vip 10.70.89.101 xifenfei02-priv 10.70.89.79 xifenfei-scan
网卡配置
xifenfei01:/u01/soft/grid> ifconfig -a en7: flags=1e084863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN> inet 10.70.89.100 netmask 0xffffffe0 broadcast 10.70.89.127 tcp_sendspace 131072 tcp_recvspace 65536 rfc1323 0 en6: flags=1e084863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN> inet 10.70.89.68 netmask 0xffffffe0 broadcast 10.70.89.95 tcp_sendspace 131072 tcp_recvspace 65536 rfc1323 0 lo0: flags=e08084b,c0<UP,BROADCAST,LOOPBACK,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,LARGESEND,CHAIN> inet 127.0.0.1 netmask 0xff000000 broadcast 127.255.255.255 inet6 ::1%1/0 tcp_sendspace 131072 tcp_recvspace 131072 rfc1323 1 xifenfei02/#ifconfig -a en6: flags=1e084863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN> inet 10.70.89.71 netmask 0xffffffe0 broadcast 10.70.89.95 tcp_sendspace 131072 tcp_recvspace 65536 rfc1323 0 en7: flags=1e084863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN> inet 10.70.89.101 netmask 0xffffffe0 broadcast 10.70.89.127 tcp_sendspace 131072 tcp_recvspace 65536 rfc1323 0 lo0: flags=e08084b,c0<UP,BROADCAST,LOOPBACK,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,LARGESEND,CHAIN> inet 127.0.0.1 netmask 0xff000000 broadcast 127.255.255.255 inet6 ::1%1/0 tcp_sendspace 131072 tcp_recvspace 131072 rfc1323 1 xifenfei01/asmdisks#netstat -in Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll en7 1500 link#2 0.11.25.bd.b8.7a 107 0 132 2 0 en7 1500 10.70.89.96 10.70.89.100 107 0 132 2 0 en6 1500 link#3 0.11.25.bd.a8.93 50015 0 36963 2 0 en6 1500 10.70.89.64 10.70.89.68 50015 0 36963 2 0 lo0 16896 link#1 1589 0 1588 0 0 lo0 16896 127 127.0.0.1 1589 0 1588 0 0 lo0 16896 ::1%1 1589 0 1588 0 0 xifenfei02/asmdisks#netstat -in Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll en6 1500 link#2 0.11.25.bd.a8.a9 5401 0 3660 2 0 en6 1500 10.70.89.64 10.70.89.71 5401 0 3660 2 0 en7 1500 link#3 0.11.25.bd.51.d2 129 0 123 2 0 en7 1500 10.70.89.96 10.70.89.101 129 0 123 2 0 lo0 16896 link#1 1249 0 1249 0 0 lo0 16896 127 127.0.0.1 1249 0 1249 0 0 lo0 16896 ::1%1 1249 0 1249 0 0
这里可以看到网卡和IP配置是匹配,但是两台主机网卡显示顺序不一样.查看EtherChannel配置,也是正常的
网络ping测试
xifenfei01:/u01/soft/grid> ping xifenfei01-priv PING xifenfei01-priv: (10.70.89.100): 56 data bytes 64 bytes from 10.70.89.100: icmp_seq=0 ttl=255 time=0 ms 64 bytes from 10.70.89.100: icmp_seq=1 ttl=255 time=0 ms xifenfei02/#ping xifenfei01-priv PING xifenfei01-priv: (10.70.89.100): 56 data bytes 64 bytes from 10.70.89.100: icmp_seq=0 ttl=255 time=0 ms 64 bytes from 10.70.89.100: icmp_seq=1 ttl=255 time=0 ms
使用runcluvfy.sh检测网络配置
./runcluvfy.sh comp nodecon -i en7 -n xifenfei01-priv,xifenfei02-priv -verbose xifenfei01:/u01/soft/grid> ./runcluvfy.sh comp nodecon -i en7 -n xifenfei01-priv,xifenfei02-priv -verbose Verifying node connectivity Checking node connectivity... Checking hosts config file... Node Name Status Comment ------------ ------------------------ ------------------------ xifenfei02-priv passed successful xifenfei01-priv failed Invalid Entry ERROR: PRVF-4190 : Verification of the hosts config file failed Interface information for node "xifenfei02-priv" Name IP Address Subnet Gateway Def. Gateway HW Address MTU ------ --------------- --------------- --------------- --------------- ----------------- ------ en6 10.70.89.71 10.70.89.64 10.70.89.71 10.70.89.65 00:11:25:BD:A8:A9 1500 en7 10.70.89.101 10.70.89.96 10.70.89.101 10.70.89.65 00:11:25:BD:51:D2 1500 Interface information for node "xifenfei01-priv" Name IP Address Subnet Gateway Def. Gateway HW Address MTU ------ --------------- --------------- --------------- --------------- ----------------- ------ en7 10.70.89.100 10.70.89.96 10.70.89.100 10.70.89.65 00:11:25:BD:B8:7A 1500 en6 10.70.89.68 10.70.89.64 10.70.89.68 10.70.89.65 00:11:25:BD:A8:93 1500 Check: Node connectivity for interface "en7" Source Destination Connected? ------------------------------ ------------------------------ ---------------- xifenfei02-priv[10.70.89.101] xifenfei01-priv[10.70.89.100] yes Result: Node connectivity passed for interface "en7" Check: TCP connectivity of subnet "10.70.89.96" Source Destination Connected? ------------------------------ ------------------------------ ---------------- xifenfei01:10.70.89.68 xifenfei02-priv:10.70.89.101 passed xifenfei01:10.70.89.68 xifenfei01-priv:10.70.89.100 passed Result: TCP connectivity check passed for subnet "10.70.89.96" Checking subnet mask consistency... Subnet mask consistency check passed for subnet "10.70.89.64". Subnet mask consistency check passed for subnet "10.70.89.96". Subnet mask consistency check passed. Result: Node connectivity check failed Verification of node connectivity was unsuccessful. Checks did not pass for the following node(s): xifenfei01-priv
这里显示xifenfei01-priv主机检测失败,报错为PRVF-4190,检查xifenfei01主机的hosts文件发现一处错误记录
xifenfei01/#vi /etc/hosts "/etc/hosts" 113 lines, 3556 characters # @(#)47 1.1 src/bos/usr/sbin/netstart/hosts, cmdnet, bos530 7/24/91 10: 00:46 # IBM_PROLOG_BEGIN_TAG # This is an automatically generated prolog. # # bos530 src/bos/usr/sbin/netstart/hosts 1.1 # # Licensed Materials - Property of IBM # # (C) COPYRIGHT International Business Machines Corp. 1985,1989 # All Rights Reserved # # US Government Users Restricted Rights - Use, duplication or # disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
这里发现”00:46″是一个新行,而且是无效记录,除掉该行记录,继续runcluvfy.sh测试
xifenfei01:/u01/soft/grid> ./runcluvfy.sh comp nodecon -i en7 -n xifenfei01-priv,xifenfei02-priv -verbose Verifying node connectivity Checking node connectivity... Checking hosts config file... Node Name Status ------------------------------------ ------------------------ xifenfei02-priv passed xifenfei01-priv passed Verification of the hosts config file successful Interface information for node "xifenfei02-priv" Name IP Address Subnet Gateway Def. Gateway HW Address MTU ------ --------------- --------------- --------------- --------------- ----------------- ------ en6 10.70.89.71 10.70.89.64 10.70.89.71 10.70.89.65 00:11:25:BD:A8:A9 1500 en7 10.70.89.101 10.70.89.96 10.70.89.101 10.70.89.65 00:11:25:BD:51:D2 1500 Interface information for node "xifenfei01-priv" Name IP Address Subnet Gateway Def. Gateway HW Address MTU ------ --------------- --------------- --------------- --------------- ----------------- ------ en7 10.70.89.100 10.70.89.96 10.70.89.100 10.70.89.65 00:11:25:BD:B8:7A 1500 en6 10.70.89.68 10.70.89.64 10.70.89.68 10.70.89.65 00:11:25:BD:A8:93 1500 Check: Node connectivity for interface "en7" Source Destination Connected? ------------------------------ ------------------------------ ---------------- xifenfei02-priv[10.70.89.101] xifenfei01-priv[10.70.89.100] yes Result: Node connectivity passed for interface "en7" Check: TCP connectivity of subnet "10.70.89.96" Source Destination Connected? ------------------------------ ------------------------------ ---------------- xifenfei01:10.70.89.68 xifenfei02-priv:10.70.89.101 passed xifenfei01:10.70.89.68 xifenfei01-priv:10.70.89.100 passed Result: TCP connectivity check passed for subnet "10.70.89.96" Checking subnet mask consistency... Subnet mask consistency check passed for subnet "10.70.89.64". Subnet mask consistency check passed for subnet "10.70.89.96". Subnet mask consistency check passed. Result: Node connectivity check passed Verification of node connectivity was successful.
除掉无效记录后,runcluvfy检查通过.OUI继续安装一切正常.
果然是由于/etc/hosts中出现无效记录,从而使得RAC安装检查无法通过,再次提醒各位安装RAC需要小心hosts文件
参考文档:PRVF-4190 Verification of the Hosts Config File Failed (Doc ID 1056025.1)
[INS-41112] Specified network interface doesnt maintain connectivity across cluster nodes. (Doc ID 1427202.1)
[MySQL异常恢复]使用工具直接抽取MySQL数据字典
熟悉Oracle的朋友都知道,当Oracle数据库无法正常启动之时,可以通过dul或者其他三方工具直接读取数据文件中数据,从而来抢救数据,减少损失,在mysql中如果使用了innodb引擎也可以在mysql数据库不启动启动下抽取相关记录.本文为抽取数据字典篇章,后续将继续提供drop恢复,truncate 恢复,delete恢复等mysql非常规恢复篇章.
创建一张get_dict测试表
mysql> use xifenfei; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> show tables; +--------------------+ | Tables_in_xifenfei | +--------------------+ | t_delete | +--------------------+ 1 row in set (0.00 sec) mysql> create table get_dict(id int not null primary key,name varchar(100)); Query OK, 0 rows affected (0.01 sec) mysql> insert into get_dict value(1,'www.xifenfei.com'); Query OK, 1 row affected (0.00 sec) mysql> insert into get_dict value(2,'www.xifenfei.com-xifenfei'); Query OK, 1 row affected (0.00 sec) mysql> insert into get_dict value(3,'xifenfei-www.xifenfei.com'); Query OK, 1 row affected (0.00 sec) mysql> show tables; +--------------------+ | Tables_in_xifenfei | +--------------------+ | get_dict | | t_delete | +--------------------+ 2 rows in set (0.00 sec mysql> select TABLE_NAME,TABLE_SCHEMA,TABLE_TYPE from information_schema.tables -> where table_name='get_dict'; +------------+--------------+------------+ | TABLE_NAME | TABLE_SCHEMA | TABLE_TYPE | +------------+--------------+------------+ | get_dict | xifenfei | BASE TABLE | +------------+--------------+------------+ 1 row in set (0.01 sec) mysql> select TABLE_NAME,NON_UNIQUE,TABLE_SCHEMA,INDEX_SCHEMA,INDEX_NAME,COLUMN_NAME from -> INFORMATION_SCHEMA.STATISTICS where TABLE_NAME='get_dict'; +------------+------------+--------------+--------------+------------+-------------+ | TABLE_NAME | NON_UNIQUE | TABLE_SCHEMA | INDEX_SCHEMA | INDEX_NAME | COLUMN_NAME | +------------+------------+--------------+--------------+------------+-------------+ | get_dict | 0 | xifenfei | xifenfei | PRIMARY | id | +------------+------------+--------------+--------------+------------+-------------+ 1 row in set (0.00 sec) mysql> select TABLE_SCHEMA,TABLE_NAME,COLUMN_NAME,ORDINAL_POSITION from -> information_schema.COLUMNS where table_name='get_dict'; +--------------+------------+-------------+------------------+ | TABLE_SCHEMA | TABLE_NAME | COLUMN_NAME | ORDINAL_POSITION | +--------------+------------+-------------+------------------+ | xifenfei | get_dict | id | 1 | | xifenfei | get_dict | name | 2 | +--------------+------------+-------------+------------------+ 2 rows in set (0.01 sec)
关闭mysql数据库
[root@localhost recovery_mysql]# service mysql stop Shutting down MySQL..[ OK ] [root@localhost recovery_mysql]# ps -ef|grep mysql root 18876 15827 0 18:05 pts/1 00:00:00 grep mysql
使用工具解析innodb文件
[root@localhost recovery_mysql]# ./stream_parser -f /var/lib/mysql/ibdata1 Opening file: /var/lib/mysql/ibdata1 File information: Opening file: /var/lib/mysql/ibdata1 File information: ID of device containing file: 2054 inode number: 1782889 ID of device containing file: 2054 protection: 100660 inode number: 1782889 (regular file) protection: 100660 number of hard links: 1 (regular file) user ID of owner: 101 number of hard links: 1 group ID of owner: 102 user ID of owner: 101 device ID (if special file): 0 group ID of owner: 102 blocksize for filesystem I/O: 4096 device ID (if special file): 0 number of blocks allocated: 24616 blocksize for filesystem I/O: 4096 Opening file: /var/lib/mysql/ibdata1 number of blocks allocated: 24616 File information: ……………… user ID of owner: 101 group ID of owner: 102 device ID (if special file): 0 blocksize for filesystem I/O: 4096 ID of device containing file: 2054 number of blocks allocated: 24616 inode number: 1782889 protection: 100660 (regular file) number of hard links: 1 user ID of owner: 101 group ID of owner: 102 device ID (if special file): 0 blocksize for filesystem I/O: 4096 number of blocks allocated: 24616 time of last access: 1417922668 Sun Dec 7 11:24:28 2014 time of last modification: 1418294104 Thu Dec 11 18:35:04 2014 time of last status change: 1418294104 Thu Dec 11 18:35:04 2014 time of last access: 1417922668 Sun Dec 7 11:24:28 2014 total size, in bytes: 12582912 (12.000 MiB) time of last modification: 1418294104 Thu Dec 11 18:35:04 2014 time of last status change: 1418294104 Thu Dec 11 18:35:04 2014 Size to process: 12582912 (12.000 MiB) total size, in bytes: 12582912 (12.000 MiB) Size to process: 12582912 (12.000 MiB) All workers finished in 0 sec
主要文件介绍
[root@localhost recovery_mysql]# ls -l pages-ibdata1/FIL_PAGE_INDEX/ total 1388 -rw-r--r-- 1 root root 16384 Dec 11 18:51 0000000000000001.page -rw-r--r-- 1 root root 16384 Dec 11 18:51 0000000000000002.page -rw-r--r-- 1 root root 49152 Dec 11 18:51 0000000000000003.page -rw-r--r-- 1 root root 49152 Dec 11 18:51 0000000000000004.page -rw-r--r-- 1 root root 16384 Dec 11 18:51 0000000000000005.page -rw-r--r-- 1 root root 114688 Dec 11 18:51 0000000000000011.page -rw-r--r-- 1 root root 114688 Dec 11 18:51 0000000000000012.page -rw-r--r-- 1 root root 114688 Dec 11 18:51 0000000000000013.page -rw-r--r-- 1 root root 114688 Dec 11 18:51 0000000000000014.page -rw-r--r-- 1 root root 114688 Dec 11 18:51 0000000000000015.page -rw-r--r-- 1 root root 147456 Dec 11 18:51 0000000000000016.page -rw-r--r-- 1 root root 98304 Dec 11 18:51 0000000000000017.page -rw-r--r-- 1 root root 114688 Dec 11 18:51 0000000000000018.page -rw-r--r-- 1 root root 49152 Dec 11 18:51 0000000000000019.page -rw-r--r-- 1 root root 49152 Dec 11 18:51 0000000000000020.page -rw-r--r-- 1 root root 49152 Dec 11 18:51 0000000000000021.page -rw-r--r-- 1 root root 65536 Dec 11 18:51 0000000000000025.page -rw-r--r-- 1 root root 16384 Dec 11 18:51 18446744069414584320.page
0000000000000001.page主要是记录mysql中表信息文件
0000000000000002.page主要是记录mysql中的表的列的信息文件
0000000000000003.page主要是记录mysql中表的index信息文件
抽取table数据
[root@localhost recovery_mysql]# ./c_parser -4f pages-ibdata1/FIL_PAGE_INDEX/0000000000000001.page -t dictionary/SYS_TABLES.sql > dumps/default/SYS_TABLES 2> dumps/default/SYS_TABLES.sql [root@localhost recovery_mysql]# grep get dumps/default/SYS_TABLES | head -5 000000000D1D 95000001510110 SYS_TABLES "xifenfei/get\_dict" 23 2 1 0 80 "" 9 [root@localhost recovery_mysql]# cat dumps/default/SYS_TABLES.sql SET FOREIGN_KEY_CHECKS=0; LOAD DATA LOCAL INFILE '/tmp/recovery_mysql/dumps/default/SYS_TABLES' REPLACE INTO TABLE `SYS_TABLES` FIELDS TERMINATED BY '\t' OPTIONALLY ENCLOSED BY '"' LINES STARTING BY 'SYS_TABLES\t' (`NAME`, `ID`, `N_COLS`, `TYPE`, `MIX_ID`, `MIX_LEN`, `CLUSTER_NAME`, `SPACE`);
抽取column数据
[root@localhost recovery_mysql]# ./c_parser -4f pages-ibdata1/FIL_PAGE_INDEX/0000000000000002.page -t dictionary/SYS_COLUMNS.sql > dumps/default/SYS_COLUMNS 2> dumps/default/SYS_COLUMNS.sql [root@localhost recovery_mysql]# cat dumps/default/SYS_COLUMNS -- Page id: 10, Format: REDUNDANT, Records list: Valid, Expected records: (115 115) 000000000300 800000012D0123 SYS_COLUMNS 11 0 "ID" 1 4 0 0 000000000300 800000012D0138 SYS_COLUMNS 11 1 "FOR\_NAME" 1 4 0 0 ………… 000000000D1D 95000001510129 SYS_COLUMNS 23 0 "id" 6 1283 4 0 000000000D1D 9500000151013E SYS_COLUMNS 23 1 "name" 1 524303 100 0 -- Page id: 10, Found records: 115, Lost records: NO, Leaf page: YES [root@localhost recovery_mysql]# more dumps/default/SYS_COLUMNS.sql SET FOREIGN_KEY_CHECKS=0; LOAD DATA LOCAL INFILE '/tmp/recovery_mysql/dumps/default/SYS_COLUMNS' REPLACE INTO TABLE `SYS_COLUMNS` FIELDS TERMINATED BY '\t' OPTIONALLY ENCLOSED BY '"' LINES STARTING BY 'SYS_COLUMNS\t' (`TABLE_ID`, `POS`, `NAME`, `MTYPE`, `PRTYPE`, `LEN`, `PREC`);
抽取index数据
[root@localhost recovery_mysql]# ./c_parser -4f pages-ibdata1/FIL_PAGE_INDEX/0000000000000003.page -t dictionary/SYS_INDEXES.sql > dumps/default/SYS_INDEXES 2> dumps/default/SYS_INDEXES.sql [root@localhost recovery_mysql]# more dumps/default/SYS_INDEXES.sql SET FOREIGN_KEY_CHECKS=0; LOAD DATA LOCAL INFILE '/tmp/recovery_mysql/dumps/default/SYS_INDEXES' REPLACE INTO TABLE `SYS_INDEXES` FIELDS TERMINATED BY '\t' OPTIONALLY ENCLOSED BY '"' LINES STARTING BY 'SYS_INDEXES\t' (`TABLE_ID`, `ID`, `NAME`, `N_FIELDS`, `TYPE`, `SPACE`, `PAGE_NO`); [root@localhost recovery_mysql]# more dumps/default/SYS_INDEXES -- Page id: 11, Format: REDUNDANT, Records list: Valid, Expected records: (13 13) 000000000300 800000012D0177 SYS_INDEXES 11 11 "ID\_IND" 1 3 0 302 ………… 000000000B02 820000013504C8 SYS_INDEXES 20 22 "GEN\_CLUST\_INDEX" 0 1 6 3 000000000D1D 9500000151016B SYS_INDEXES 23 25 "PRIMARY" 1 3 9 3
启动mysql数据库
[root@localhost recovery_mysql]# service mysql start Starting MySQL..[ OK ] [root@localhost recovery_mysql]# ps -ef|grep mysql root 18948 1 0 19:57 pts/1 00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/localhost.localdomain.pid mysql 19049 18948 14 19:57 pts/1 00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/localhost.localdomain.err --pid-file=/var/lib/mysql/localhost.localdomain.pid root 19078 15827 0 19:58 pts/1 00:00:00 grep mysql
创建抽取数据字典表
mysql> source dictionary/SYS_TABLES.sql Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) ………… mysql> source dictionary/SYS_INDEXES.sql Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) ………… mysql> source dictionary/SYS_COLUMNS.sql Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) ………… mysql> show tables; +----------------+ | Tables_in_test | +----------------+ | SYS_COLUMNS | | SYS_INDEXES | | SYS_TABLES | +----------------+ 3 rows in set (0.00 sec)
加载抽取数据字典数据
mysql> source dumps/default/SYS_TABLES.sql Query OK, 0 rows affected (0.00 sec) Query OK, 11 rows affected (0.03 sec) Records: 11 Deleted: 0 Skipped: 0 Warnings: 0 mysql> source dumps/default/SYS_INDEXES.sql Query OK, 0 rows affected (0.00 sec) Query OK, 39 rows affected (0.01 sec) Records: 39 Deleted: 0 Skipped: 0 Warnings: 0 mysql> source dumps/default/SYS_COLUMNS.sql Query OK, 0 rows affected (0.00 sec) Query OK, 115 rows affected (0.00 sec) Records: 115 Deleted: 0 Skipped: 0 Warnings: 0
验证抽取数据字典数据
mysql> desc SYS_TABLES -> ; +--------------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------------+---------------------+------+-----+---------+-------+ | NAME | varchar(255) | NO | PRI | | | | ID | bigint(20) unsigned | NO | | 0 | | | N_COLS | int(10) | YES | | NULL | | | TYPE | int(10) unsigned | YES | | NULL | | | MIX_ID | bigint(20) unsigned | YES | | NULL | | | MIX_LEN | int(10) unsigned | YES | | NULL | | | CLUSTER_NAME | varchar(255) | YES | | NULL | | | SPACE | int(10) unsigned | YES | | NULL | | +--------------+---------------------+------+-----+---------+-------+ 8 rows in set (0.00 sec) mysql> SELECT NAME,ID from SYS_TABLES WHERE NAME='xifenfei/get_dict'; +-------------------+----+ | NAME | ID | +-------------------+----+ | xifenfei/get_dict | 23 | +-------------------+----+ 1 row in set (0.00 sec) mysql> desc SYS_COLUMNS -> ; +----------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +----------+---------------------+------+-----+---------+-------+ | TABLE_ID | bigint(20) unsigned | NO | PRI | NULL | | | POS | int(10) unsigned | NO | PRI | NULL | | | NAME | varchar(255) | YES | | NULL | | | MTYPE | int(10) unsigned | YES | | NULL | | | PRTYPE | int(10) unsigned | YES | | NULL | | | LEN | int(10) unsigned | YES | | NULL | | | PREC | int(10) unsigned | YES | | NULL | | +----------+---------------------+------+-----+---------+-------+ 7 rows in set (0.00 sec) mysql> SELECT TABLE_ID,NAME,MTYPE FROM SYS_COLUMNS WHERE TABLE_ID=23; +----------+------+-------+ | TABLE_ID | NAME | MTYPE | +----------+------+-------+ | 23 | id | 6 | | 23 | name | 1 | +----------+------+-------+ 2 rows in set (0.01 sec) mysql> SELECT TABLE_ID,ID,NAME,TYPE FROM SYS_INDEXES WHERE TABLE_ID=23; +----------+----+---------+------+ | TABLE_ID | ID | NAME | TYPE | +----------+----+---------+------+ | 23 | 25 | PRIMARY | 3 | +----------+----+---------+------+ 1 row in set (0.00 sec)
这里基本上可以看出来,在mysql数据库未启动情况下,使用工具可以正常抽取mysql数据字典信息