C++博客-blueskiner-随笔分类-数据库

ld: 0711-736 XCOFF64 object files are not allowed in 32-bit mode

卡洛shll — Fri, 12 Oct 2012 07:47:00 GMT

编译BDB报错：

……

Stop.
ld: 0711-736 ERROR: Input file jjkz_rcv.o:
XCOFF64 object files are not allowed in 32-bit mode.

查了link，解决方法为在系统变量里加个参数：

export OBJECT_MODE=64

编译过去了，可执行文件生成了。

还有报错，估计是程序的通用性问题。

记下来，便于以后查找。

卡洛shll 2012-10-12 15:47 发表评论

Berkeley DB在Queue模式下的使用

卡洛shll — Thu, 06 Sep 2012 07:13:00 GMT

Berkeley DB在Queue模式下的使用

   Queue模式下仅能存储定长的记录，即value的长度为定长。Queue的key是一个逻辑增长的数，一般就是int。
不需要开发者去改变这个类型。

   Queue模式下只能存储定长的记录。所以一定要调用Db的set_re_len函数来设定数据库中记录的长度。
如果没有设定，默认的为0。这样当存储记录时一定会报异常。程序出错。
在读取记录时，当记录的长度小于设定的长度时，会填充字符达到设定长度。
默认的字符为0x02（ASCII中的）。可以设定自己的填充字符。调用DB的set_re_pad。

一个简单的示例

#include
#include
#include

struct ValueType
{
   int _int;
   char _char;
   char _array[256];
};

void writeDB( void )
{
   Db bdb(0, 0);

   bdb.set_re_len(sizeof(ValueType)); //用Queue模式一定要调用，而且一定要在open前调用
   bdb.set_re_pad(0x00); //填充字符串为0。

   bdb.open(0, "SaveRecodeDB.db", 0, DB_QUEUE, DB_CREATE, 0);

   size_t k;
   ValueType v;
   Dbt key&k, sizeof(size_t));
   Dbt value(&v, sizeof(ValueType));

   //直接用数据库的写函数
   for (int i=0; i<1000000; ++i) {
       bdb.put(0, &key, &value, DB_APPEND);
   }

   bdb.close(0);
}

int main( int argc, char* argv[] )
{
   clock_t et1 = clock();
   writeDB();
   clock_t et2 = clock();

   std::cout << "work is fine, " << "have times : " << et2 - et1 << std::endl;
   return 0;
}

在Queue模式下不能用游标进行数据的插入。只能进行数据的修改。

Queue模式读数据的一个简单的示例
在Queue模式下读数据，记录（Dbt）要调用set_ulen函数和set_flags函数

#include
#include
#include

struct ValueType
{
    int _int;
    char _char;
    char _array[256];
};

void readDB( void )
{
   Db bdb(0, 0);

   bdb.set_re_len(sizeof(ValueType)); //用Queue模式一定要调用，而且一定要在open前调用
   bdb.set_re_pad(0x00); //字符串的填充为0。

   bdb.open(0, "SaveRecodeDB.db", 0, DB_QUEUE, DB_CREATE, 0);

   size_t k;
   ValueType v;
   Dbt key( &k, sizeof( size_t ) );
   key.set_ulen( sizeof( size_t ) );

   Dbt value( &v, sizeof( ValueType ) );
   value.set_ulen( sizeof( ValueType ) );
   value.set_flags( DB_DBT_USERMEM );

   //直接用数据库的读函数
   for( int i=0; i<1000000; ++i )
   {
       bdb.get( 0, &key, &value, DB_CONSUME );
   }

   bdb.close( 0 );
}

int main( int argc, char* argv[] )
{
    clock_t et1 = clock();
    readDB();
    clock_t et2 = clock();

    std::cout << "work is fine, " << "have times : " << et2 - et1 << std::endl;
    return 0;
}

卡洛shll 2012-09-06 15:13 发表评论

oracle清除数据库表空间

卡洛shll — Thu, 30 Aug 2012 02:20:00 GMT

在数据库表空间满后，直接执行drop，delete，truncate等删除数据的操作，都不会释放数据库表空间，释放os的空间，用df -lh 查看都还是满的。虽然oracle的表空间即便不被回收，也是可以利用的，但会引起问题，释放os的空间是最放心的。

在这种情况下，如果要释放os的空间，解决办法如下：

       1.exp
       2.drop tablespace
       3.create tablespace
       4.imp

1.exp 导出表空间中所需的数据。

在这之前，如果日志数据不是很必要，非保留不可，可以先truncate table tablename;然后导出数据已满的表空间。cd $ORACLE_HOME/bin目录下，

./expname/pass@testdbfile=/tmp/bak/tabelspace.dmp tablespaces=TBS_TEST

2.drop tablespace 删除数据库表空间

命令drop tablespace TBS_TEST INCLUDING CONTENTS;然后进入到表空间的物理存储目录，执行rm -f *，这是空间利用率下来了。如果想直接删除文件，可以用drop tablespace TBS_TEST INCLUDING CONTENTS and datafiles;，这是会发现时间的物理数据文件已经没有了，但df -lh空间使用率并没有变化，需要重启数据库。删除表空间和删除物理文件的顺序不能改变，如果反了，请参考上一篇文章。

3.create tablespace 重新创建数据库表空间

使用创建命令，直接创建即可。create bigfile tablespace tbs_test datafile '/usr/data/test/tbs_test.DBF' size 2000M autoextend on next 100M;

4.imp 导入数据文件

./impname/pass@testdbfile=/tmp/bakloginfo.dmp full=y tablespaces=TBS_TEST

如果不想做导入导出，比如索引表空间，可以直接删除表空间，删除物理文件，然后创建表空间，重建索引。

卡洛shll 2012-08-30 10:20 发表评论

ORACLE的TNS配置

卡洛shll — Mon, 27 Aug 2012 10:50:00 GMT

在ORACLE当中，如果想访问某个服务器，必需要设置TNS，它不想SQLSERVER那样，客户端会自动列举出在局域网内所有的在线服务器，只需在客户端选择需要的服务器，然后使用帐号与密码登录即可。而ORCAL是不会自动列举出网内的服务器的，需要通过读取TNS配置文件才能列出经过配置的服务器名。

ORACLE的配置文件名：tnsnames.ora

文件所在路径：安装ORACLE所在的目录\oracle\ora92\network\admin\tnsnames.ora

配置的一个实例：

# TNSNAMES.ORA Network Configuration File: D:\Oracle\network\admin\tnsnames.ora

# Generated by Oracle configuration tools.

ODS =

(description =

(address = (protocol = tcp)(host = 10.201.64.12)(port = 1521))

(connect_data =

(sid = ods)

)

AUTOCLM_10.210.4.11 =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.210.4.11)(PORT = 1521))

)

(CONNECT_DATA =

(SID = autoclm)

(SERVER = DEDICATED)

)

PROPTEST_10.210.4.30 =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.210.4.30)(PORT = 1521))

)

(CONNECT_DATA =

(SID = proptest)

(SERVER = DEDICATED)

)

p05 =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.201.64.14)(PORT = 1521))

)

(CONNECT_DATA =

(SID = p05)

(SERVER = DEDICATED)

)

p05_8 =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.201.64.8)(PORT = 1521))

)

(CONNECT_DATA =

(SID = p05)

)

ODS =

(description =

(address = (protocol = tcp)(host = 10.201.64.8)(port = 1521))

(connect_data =

(sid = p05)

)

test_14 =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.201.64.14)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = p05test)

)

CIBS =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.203.68.71)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = cibs)

)

ORA10 =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.202.1.77)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = ORA10)

)

CIBS =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.203.68.71)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = cibs)

)

CAI =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.203.68.80)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = proplh)

)

CHELP =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 10.203.68.137)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = autoclm)

)

配置完毕后，客户端就可以列举出“CAI”，“CHELP”，“CIBS”等的服务器名出来。

卡洛shll 2012-08-27 18:50 发表评论

ORA-01034:ORACLE not available问题的解决方法

卡洛shll — Mon, 27 Aug 2012 08:07:00 GMT

[mailz@/cdr2/home/mailz]$ su - oracle
oracle's Password:
-bash-3.00$ sqlplus /as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production

Usage 1: sqlplus -H | -V

    -H             Displays the SQL*Plus version and the
                   usage help.
    -V             Displays the SQL*Plus version.

Usage 2: sqlplus [ [

    -C    Sets the compatibility of affected commands to the
                   version specified by . The version has
                   the form "x.y[.z]". For example, -C 10.2.0
    -L             Attempts to log on just once, instead of
                   reprompting on error.
    -M "" Sets automatic HTML markup of output. The options
                   have the form:
                   HTML [ON|OFF] [HEAD text] [BODY text] [TABLE text]
                   [ENTMAP {ON|OFF}] [SPOOL {ON|OFF}] [PRE[FORMAT] {ON|OFF}]
    -R      Sets restricted mode to disable SQL*Plus commands
                   that interact with the file system. The level can
                   be 1, 2 or 3. The most restrictive is -R 3 which
                   disables all user commands interacting with the
                   file system.
    -S             Sets silent mode which suppresses the display of
                   the SQL*Plus banner, prompts, and echoing of
                   commands.

is: ([/][@] | /)
[AS SYSDBA | AS SYSOPER] | /NOLOG

    Specifies the database account username, password and connect
    identifier for the database connection. Without a connect
    identifier, SQL*Plus connects to the default database.

The AS SYSDBA and AS SYSOPER options are database administration
privileges.

The /NOLOG option starts SQL*Plus without connecting to a
database.

is: @|[.] [ ...]

    Runs the specified SQL*Plus script from a web server (URL) or the
    local file system (filename.ext) with specified parameters that
    will be assigned to substitution variables in the script.

When SQL*Plus starts, and after CONNECT commands, the site profile
(e.g. $ORACLE_HOME/sqlplus/admin/glogin.sql) and the user profile
(e.g. login.sql in the working directory) are run. The files may
contain SQL*Plus commands.

Refer to the SQL*Plus User's Guide and Reference for more information.
-bash-3.00$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Aug 27 15:54:53 2012

Connected to an idle instance.

SQL> alter user sys identified by 123;
alter user sys identified by 123
*
ERROR at line 1:
ORA-01034: ORACLE not available

SQL> select username from dba_users;
select username from dba_users
*
ERROR at line 1:
ORA-01034: ORACLE not available

SQL> quit
Disconnected
-bash-3.00$ id oracle
uid=205(oracle) gid=203(oinstall) groups=204(dba)
-bash-3.00$ lsnrctl start

LSNRCTL for IBM/AIX RISC System/6000: Version 10.2.0.1.0 - Production on 27-AUG-2012 15:57:24

Starting /cdr2/app/oracle/product/10gr2/bin/tnslsnr: please wait...

TNSLSNR for IBM/AIX RISC System/6000: Version 10.2.0.1.0 - Production
System parameter file is /cdr2/app/oracle/product/10gr2/network/admin/listener.ora
Log messages written to /cdr2/app/oracle/product/10gr2/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=cdr2)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for IBM/AIX RISC System/6000: Version 10.2.0.1.0 - Production
Start Date                27-AUG-2012 15:57:27
Uptime                    0 days 0 hr. 0 min. 2 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      ON
Listener Parameter File   /cdr2/app/oracle/product/10gr2/network/admin/listener.ora
Listener Log File         /cdr2/app/oracle/product/10gr2/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=cdr2)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "ocstest" has 1 instance(s).
Instance "ocstest", status UNKNOWN, has 1 handler(s) for this service...
Service "test62" has 1 instance(s).
Instance "test62", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
-bash-3.00$ id
uid=205(oracle) gid=203(oinstall) groups=204(dba)
-bash-3.00$ lsnrctl status

LSNRCTL for IBM/AIX RISC System/6000: Version 10.2.0.1.0 - Production on 27-AUG-2012 15:58:31

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for IBM/AIX RISC System/6000: Version 10.2.0.1.0 - Production
Start Date                27-AUG-2012 15:57:27
Uptime                    0 days 0 hr. 1 min. 5 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      ON
Listener Parameter File   /cdr2/app/oracle/product/10gr2/network/admin/listener.ora
Listener Log File         /cdr2/app/oracle/product/10gr2/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=cdr2)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "ocstest" has 1 instance(s).
Instance "ocstest", status UNKNOWN, has 1 handler(s) for this service...
Service "test62" has 1 instance(s).
Instance "test62", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
-bash-3.00$ sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Aug 27 15:59:00 2012

SQL> connect /as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.

Total System Global Area 1610612736 bytes
Fixed Size                  2021224 bytes
Variable Size             318769304 bytes
Database Buffers         1275068416 bytes
Redo Buffers               14753792 bytes
Database mounted.
Database opened.
SQL> quit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
-bash-3.00$ env|grep ORACLE
ORACLE_SID=ocstest
ORACLE_BASE=/cdr2/app/oracle
ORACLE_HOME=/cdr2/app/oracle/product/10gr2
-bash-3.00$ sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Aug 27 16:00:36 2012

SQL> connect /as sysdba
Connected.
SQL> select username from dba_users;

卡洛shll 2012-08-27 16:07 发表评论

undefined reference boost::system::get_system_category

卡洛shll — Sun, 05 Aug 2012 11:47:00 GMT

这个问题是在从1.82升级到2.0的时候出的连接问题，自己用了很长时间才解决掉，总算解决了，分享下原因吧。主要是因为从官网上下载的C++ Mongo驱动有问题。必须自己编译，可以通过命令查看：

源码 copy to clipboard 打印？

>>nm libmongoclient.a | grep get_system_category
U _ZN5boost6system19get_system_categoryEv
U _ZN5boost6system19get_system_categoryEv
U _ZN5boost6system19get_system_categoryEv
U _ZN5boost6system19get_system_categoryEv
U _ZN5boost6system19get_system_categoryE

>>nm libmongoclient.a | grep get_system_category                                                                              
U _ZN5boost6system19get_system_categoryEv
U _ZN5boost6system19get_system_categoryEv
U _ZN5boost6system19get_system_categoryEv
U _ZN5boost6system19get_system_categoryEv
U _ZN5boost6system19get_system_categoryE

会发现这个在boost库中根本就没有这个函数。可能官网提供的lib编译参数不一样。只能自己编译了。另外如果boost还有其它问题，你需要。

1.删除boost /usr/include/ 和/usr/lib/下的所有关于boost的文件还有系统自带的一般在 /usr/lib64 下可以通过 locate boost | grep usr 来查找

2.重新安装boost:

源码 copy to clipboard 打印？

./bootstrap.sh
./bjam install
默认会安装到/usr/local 下

    ./bootstrap.sh
    ./bjam install 
    默认会安装到/usr/local 下

卡洛shll 2012-08-05 19:47 发表评论