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  • [20170825]不启动监听远程能连接数据库吗2.txt

    [20170825]不启动监听远程能连接数据库吗2.txt

    --//曾经写过一篇不启动监听连接数据库的帖子:http://blog.itpub.net/267265/viewspace-1816211/
    --//利用共享服务器模式.
    --//昨天测试备库启动drcp,突然想到这个跟共享模式有一些类似.自己也测试看看.

    1.环境:
    SYS@book> @ &r/ver1
    PORT_STRING                    VERSION        BANNER
    ------------------------------ -------------- --------------------------------------------------------------------------------
    x86_64/Linux 2.4.xx            11.2.0.4.0     Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

    --//启动drcp.
    SYS@book> exec dbms_connection_pool.start_pool()
    PL/SQL procedure successfully completed.

    $ lsnrctl service
    LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 25-AUG-2017 16:40:36
    Copyright (c) 1991, 2013, Oracle.  All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=127.0.0.1)(PORT=1521)))
    Services Summary...
    Service "book" has 2 instance(s).
      Instance "book", status UNKNOWN, has 1 handler(s) for this service...
        Handler(s):
          "DEDICATED" established:23 refused:0
             LOCAL SERVER
      Instance "book", status READY, has 3 handler(s) for this service...
        Handler(s):
          "DEDICATED" established:31 refused:0 state:ready
             LOCAL SERVER
          "D000" established:0 refused:0 current:0 max:1022 state:ready
             DISPATCHER <machine: xxxxx, pid: 22244>
             (ADDRESS=(PROTOCOL=tcp)(HOST=xxxxx)(PORT=33994))
          "N000" established:0 refused:0 current:0 max:40000 state:ready
             CMON <machine: xxxxx, pid: 34251>
             (ADDRESS=(PROTOCOL=tcp)(HOST=xxxxx)(PORT=34401))
              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Service "book123" has 1 instance(s).
      Instance "book", status UNKNOWN, has 1 handler(s) for this service...
        Handler(s):
          "DEDICATED" established:0 refused:0
             LOCAL SERVER
    Service "bookXDB" has 1 instance(s).
      Instance "book", status READY, has 1 handler(s) for this service...
        Handler(s):
          "D000" established:0 refused:0 current:0 max:1022 state:ready
             DISPATCHER <machine: xxxxx, pid: 22244>
             (ADDRESS=(PROTOCOL=tcp)(HOST=xxxxx)(PORT=33994))
    Service "orcl" has 1 instance(s).
      Instance "orcl", status READY, has 1 handler(s) for this service...
        Handler(s):
          "DEDICATED" established:0 refused:0 state:ready
             LOCAL SERVER
    Service "orclXDB" has 1 instance(s).
      Instance "orcl", status READY, has 1 handler(s) for this service...
        Handler(s):
          "D000" established:0 refused:0 current:0 max:1022 state:ready
             DISPATCHER <machine: xxxxx, pid: 53522>
             (ADDRESS=(PROTOCOL=tcp)(HOST=xxxxx)(PORT=64784))
    The command completed successfully

    --//注意看下划线的端口号34401.
    # lsof -i -P -n | grep 34401
    oracle    34251  oracle   11u  IPv6 32813593      0t0  TCP *:34401 (LISTEN)

    # ps -ef | grep  3425[1]
    oracle   34251     1  0 16:40 ?        00:00:00 ora_n000_book
    --//对应进程是34251.进程名为ora_n000_book.

    $ lsnrctl stop
    LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 25-AUG-2017 16:45:56
    Copyright (c) 1991, 2013, Oracle.  All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=127.0.0.1)(PORT=1521)))
    The command completed successfully

    $ lsnrctl status
    LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 25-AUG-2017 16:46:54
    Copyright (c) 1991, 2013, Oracle.  All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=127.0.0.1)(PORT=1521)))
    TNS-12541: TNS:no listener
     TNS-12560: TNS:protocol adapter error
      TNS-00511: No listener
       Linux Error: 111: Connection refused
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.100.78)(PORT=1521)))
    TNS-12541: TNS:no listener
     TNS-12560: TNS:protocol adapter error
      TNS-00511: No listener
       Linux Error: 111: Connection refused
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
    TNS-12541: TNS:no listener
     TNS-12560: TNS:protocol adapter error
      TNS-00511: No listener
       Linux Error: 2: No such file or directory
    --//可以发现监听已经关闭.

    3.测试连接:
    --//采用ezconnect模式,这样快捷一些.
    $ rlsql scott/book@192.168.100.78:34401/book:POOLED
    SQL*Plus: Release 11.2.0.4.0 Production on Fri Aug 25 16:50:41 2017
    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

    SCOTT@192.168.100.78:34401/book:POOLED> select sysdate from dual ;
    SYSDATE
    -------------------
    2017-08-25 16:50:52

    SCOTT@192.168.100.78:34401/book:POOLED> select sid, serial#,server from v$session where sid = ( select sid from v$mystat where rownum=1);
           SID    SERIAL# SERVER
    ---------- ---------- ---------
            31         57 POOLED

    SCOTT@192.168.100.78:34401/book:POOLED> @ &r/spid
           SID    SERIAL# SPID       PID  P_SERIAL# C50
    ---------- ---------- ------ ------- ---------- --------------------------------------------------
            31         57 34257       26         29 alter system kill session '31,57' immediate;

    $ ps -ef | grep 3425[7]
    oracle   34257     1  0 16:40 ?        00:00:00 ora_l002_book

    --//同样对于共享模式也一样,前面知道端口号33994.

    $ rlsql scott/book@192.168.100.78:33994/book:shared
    SQL*Plus: Release 11.2.0.4.0 Production on Fri Aug 25 16:57:06 2017
    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

    SCOTT@192.168.100.78:33994/book:shared> select sid, serial#,server from v$session where sid = ( select sid from v$mystat where rownum=1);

           SID    SERIAL# SERVER
    ---------- ---------- ---------
           263          9 SHARED

    总结:
    --//再次用一句安全的术语讲"苍蝇不叮无缝的蛋"。^_^.
    --//只要知道drcp的端口号(当然要启动这个服务)或者共享模式的端口号,不启动监听一样能连接数据库.
    --//补充netstat -tnlp | grep ora的输出.
    # netstat -tnlp | egrep 'Active|Proto|ora'
    Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name
    tcp        0      0 :::34401                    :::*                        LISTEN      34251/ora_n000_book
    tcp        0      0 :::33994                    :::*                        LISTEN      22244/ora_d000_book

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  • 原文地址:https://www.cnblogs.com/lfree/p/7428892.html
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