[20170825]不启动监听远程能连接数据库吗2

[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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