Oracle 11gR2 RAC监听器原理介绍
一、基本概念
oracle11gR2 RAC开始引入scan概念，一般通过dns服务器或gns服务器解析scan，也可以使用/etc/hosts文件解析scan，只不过oracle官方不建议这样做，hosts文件只能解析一个scan ip；另一个方面监听器前移到$GRID_HOME/network/admin/listener.ora文件，即11g rac监听器由grid用户管理，oracle用户保留文件，但已经不起作用。客户端文件tnsnames.ora依然在$ORACLE_HOME/network/admin/tnsnames.ora文件。scan的提出彻底做到了rac数据库对用户的透明管理，客户端通过scan域名直接连接数据库即可（首先客户端可以解析scan域名），具体由DNS服务器解析域名，这里如果用dns解析scan，最多可以解析3个scan vip，通过scan域名访问数据库可以实现scan vip的failover和负载均衡，即只要3个scan vip中存活一个，客户端应用既可以访问数据库。如果采用hosts文件解析scan，只能解析一个scan vip。
oracle 10g rac中监听器由oracle用户管理，每个节点上，只有一个监听器，但是这个监听器同时监听public ip和vip，即oracle 10g rac中的监听器同时承担着路由选择和建立连接的功能。10g rac客户端通过vip连接数据库。
oracle 11g rac中使用GRID_HOME下的监听器而不采用ORACLE_HOME 下的监听器，同时在oracle 11g rac中出现了多个监听器，使用名称区分。所以11g rac的监听器使用grid用户管理，而不能通过oracle用户进行管理。11g rac监听器分本地监听器（建立连接）和scan监听器（路由转发）2种，另外，每一个scan vip都会有一个scan监听器，并且运行在同一个节点上。即
rac中，每个节点上都运行一个本地监听器，这个监听器负责监听本地的vip。
rac中，会有3个节点上运行scan监听器。
rac中，scanvip和scan监听器成对出现。
二、监听器管理及故障处理
节点1 listener.ora配置：
[grid@node1 admin]$ pwd
/u01/app/11.2.0/grid/network/admin
[grid@node1 admin]$ cat listener.ora
# listener.ora.node1 Network Configuration File: /u01/app/11.2.0/grid/network/admin/listener.ora.node1
# Generated by Oracle configuration tools.
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN3 = ON
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN2 = ON
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN1 = ON
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER1 = ON
LISTENER =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = LISTENER))
)
)
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER = ON
LISTENER_SCAN3 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = LISTENER_SCAN3))
)
)
LISTENER_SCAN2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = LISTENER_SCAN2))
)
)
LISTENER_SCAN1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = LISTENER_SCAN1))
)
)
节点2 listener.ora配置：
[grid@node2 admin]$ pwd
/u01/app/11.2.0/grid/network/admin
[grid@node2 admin]$ cat listener.ora
# listener.ora.node2 Network Configuration File: /u01/app/11.2.0/grid/network/admin/listener.ora.node2
# Generated by Oracle configuration tools.
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN3 = ON
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN2 = ON
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN1 = ON
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER1 = ON
SID_LIST_LISTENER1 =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = orcl)
(ORACLE_HOME = /u01/app/11.2.0/grid)
(SID_NAME = orcl2)
)
)
LISTENER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = LISTENER))
)
ADR_BASE_LISTENER = /u01/app/grid
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER = ON
LISTENER_SCAN3 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = LISTENER_SCAN3))
)
LISTENER_SCAN2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = LISTENER_SCAN2))
)
LISTENER_SCAN1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = LISTENER_SCAN1))
)
ADR_BASE_LISTENER_SCAN3 = /u01/app/grid
ADR_BASE_LISTENER_SCAN2 = /u01/app/grid
ADR_BASE_LISTENER_SCAN1 = /u01/app/grid
1、查看scan vip配置
节点1：
[grid@node1 admin]$ srvctl config scan
SCAN name: scan-cluster, Network: 1/192.168.100.0/255.255.255.0/eth0
SCAN VIP name: scan1, IP: /scan-cluster/192.168.100.45
SCAN VIP name: scan2, IP: /scan-cluster/192.168.100.46
SCAN VIP name: scan3, IP: /scan-cluster/192.168.100.47
节点2：
[grid@node2 admin]$ srvctl config scan
SCAN name: scan-cluster, Network: 1/192.168.100.0/255.255.255.0/eth0
SCAN VIP name: scan1, IP: /scan-cluster/192.168.100.45
SCAN VIP name: scan2, IP: /scan-cluster/192.168.100.46
SCAN VIP name: scan3, IP: /scan-cluster/192.168.100.47
2、查看scan vip状态（静态）
节点1：
[grid@node1 admin]$ srvctl status scan
SCAN VIP scan1 is enabled
SCAN VIP scan1 is running on node node2
SCAN VIP scan2 is enabled
SCAN VIP scan2 is running on node node2
SCAN VIP scan3 is enabled
SCAN VIP scan3 is running on node node1
节点2：
[grid@node2 admin]$ srvctl status scan
SCAN VIP scan1 is enabled
SCAN VIP scan1 is running on node node2
SCAN VIP scan2 is enabled
SCAN VIP scan2 is running on node node2
SCAN VIP scan3 is enabled
SCAN VIP scan3 is running on node node1
3、查看scan vip状态（动态）
节点1：
[oracle@node1 admin]$ srvctl status scan
SCAN VIP scan1 is enabled
SCAN VIP scan1 is running on node node2
SCAN VIP scan2 is enabled
SCAN VIP scan2 is running on node node2
SCAN VIP scan3 is enabled
SCAN VIP scan3 is running on node node1
节点2：
[oracle@node2 admin]$ srvctl status scan
SCAN VIP scan1 is enabled
SCAN VIP scan1 is running on node node2
SCAN VIP scan2 is enabled
SCAN VIP scan2 is running on node node2
SCAN VIP scan3 is enabled
SCAN VIP scan3 is running on node node1
4、查看scan listener配置
节点1：
[grid@node1 admin]$ srvctl config scan_listener
SCAN Listener LISTENER_SCAN1 exists. Port: TCP:1521
SCAN Listener LISTENER_SCAN2 exists. Port: TCP:1521
SCAN Listener LISTENER_SCAN3 exists. Port: TCP:1521
节点2：
[grid@node2 admin]$ srvctl config scan_listener
SCAN Listener LISTENER_SCAN1 exists. Port: TCP:1521
SCAN Listener LISTENER_SCAN2 exists. Port: TCP:1521
SCAN Listener LISTENER_SCAN3 exists. Port: TCP:1521
5、查看scan listener状态
节点1：
[grid@node1 admin]$ srvctl status scan_listener
SCAN Listener LISTENER_SCAN1 is enabled
SCAN listener LISTENER_SCAN1 is running on node node2
SCAN Listener LISTENER_SCAN2 is enabled
SCAN listener LISTENER_SCAN2 is running on node node2
SCAN Listener LISTENER_SCAN3 is enabled
SCAN listener LISTENER_SCAN3 is running on node node1
节点2：
[grid@node2 admin]$ srvctl status scan_listener
SCAN Listener LISTENER_SCAN1 is enabled
SCAN listener LISTENER_SCAN1 is running on node node2
SCAN Listener LISTENER_SCAN2 is enabled
SCAN listener LISTENER_SCAN2 is running on node node2
SCAN Listener LISTENER_SCAN3 is enabled
SCAN listener LISTENER_SCAN3 is running on node node1
lsnrct命令查看scan vip状态：
节点1：
[grid@node1 admin]$ lsnrctl status LISTENER_SCAN3
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 25-MAR-2016 16:09:39
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN3)))
STATUS of the LISTENER
------------------------
Alias LISTENER_SCAN3
Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date 25-MAR-2016 11:24:15
Uptime 0 days 4 hr. 45 min. 23 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File /u01/app/11.2.0/grid/log/diag/tnslsnr/node1/listener_scan3/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN3)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.47)(PORT=1521)))
Services Summary...
Service "orcl" has 2 instance(s).
Instance "orcl1", status READY, has 1 handler(s) for this service...
Instance "orcl2", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 2 instance(s).
Instance "orcl1", status READY, has 1 handler(s) for this service...
Instance "orcl2", status READY, has 1 handler(s) for this service...
The command completed successfully
6、查看本地监听器配置
节点1：
[grid@node1 admin]$ srvctl config listener
Name: LISTENER
Network: 1, Owner: grid
Home: <CRS home>
End points: TCP:1521
节点2：
[grid@node2 admin]$ srvctl config listener
Name: LISTENER
Network: 1, Owner: grid
Home: <CRS home>
End points: TCP:1521
7、查看本地监听器状态
节点1：
[grid@node1 admin]$ srvctl status listener
Listener LISTENER is enabled
Listener LISTENER is running on node(s): node2,node1
节点2：
[grid@node2 admin]$ srvctl status listener
Listener LISTENER is enabled
Listener LISTENER is running on node(s): node2,node1
lsnrctl查看本地监听器状态：
节点1：
[grid@node1 admin]$ lsnrctl status listener
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 25-MAR-2016 16:08:03
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date 25-MAR-2016 11:24:17
Uptime 0 days 4 hr. 43 min. 46 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File /u01/app/grid/diag/tnslsnr/node1/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.41)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.42)(PORT=1521)))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "orcl" has 1 instance(s).
Instance "orcl1", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
Instance "orcl1", status READY, has 1 handler(s) for this service...
The command completed successfully
8、查看本地运行的监听器
节点1：
[grid@node1 admin]$ ps -ef|grep lsnr
grid 6290 8174 0 16:12 pts/1 00:00:00 grep lsnr
grid 23796 1 0 11:24 ? 00:00:00 /u01/app/11.2.0/grid/bin/tnslsnr LISTENER_SCAN3 -inherit
grid 23859 1 0 11:24 ? 00:00:00 /u01/app/11.2.0/grid/bin/tnslsnr LISTENER -inherit
节点2：
[grid@node2 admin]$ ps -ef|grep lsnr
grid 8649 1 0 11:44 ? 00:00:00 /u01/app/11.2.0/grid/bin/tnslsnr LISTENER_SCAN2 -inherit
grid 10591 1 0 Mar24 ? 00:00:01 /u01/app/11.2.0/grid/bin/tnslsnr LISTENER -inherit
grid 18776 6639 0 16:13 pts/1 00:00:00 grep lsnr
grid 24334 1 0 Mar24 ? 00:00:02 /u01/app/11.2.0/grid/bin/tnslsnr LISTENER_SCAN1 -inherit
9、查看数据库服务的状态
[grid@node1 admin]$ lsnrctl service
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 25-MAR-2016 16:19:54
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM1", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "orcl" has 1 instance(s).
Instance "orcl1", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:3 refused:0 state:ready
LOCAL SERVER
Service "orclXDB" has 1 instance(s).
Instance "orcl1", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: node1, pid: 11849>
(ADDRESS=(PROTOCOL=tcp)(HOST=node1)(PORT=43836))
The command completed successfully
Oracle 11gR2 RAC监听器原理介绍的更多相关文章
- Oracle 11gR2 RAC 新特性说明
最近接触了一下Oracle 11g R2 的RAC,发现变化很大. 所以在自己动手做实验之前还是先研究下它的新特性比较好. 一． 官网介绍 先看一下Oracle 的官网文档里对RAC 新特性的一 ...
- 一步一步搭建 oracle 11gR2 rac + dg 之前传 （一）【转】
一步一步在RHEL6.5+VMware Workstation 10上搭建 oracle 11gR2 rac + dg 之前传 (一) 转自 一步一步搭建 oracle 11gR2 rac + dg ...
- 一步一步搭建oracle 11gR2 rac+dg之环境准备(二)【转】
一步一步在RHEL6.5+VMware Workstation 10上搭建 oracle 11gR2 rac + dg 之环境准备 (二) 一步一步搭建oracle 11gR2 rac+dg之环境准备 ...
- 一步一步搭建oracle 11gR2 rac+dg之database安装(五)【转】
一步一步在RHEL6.5+VMware Workstation 10上搭建 oracle 11gR2 rac + dg 之database安装 (五) 转自 一步一步搭建oracle 11gR2 ...
- Linux平台 Oracle 11gR2 RAC安装Part1：准备工作
一.实施前期准备工作 1.1 服务器安装操作系统 1.2 Oracle安装介质 1.3 共享存储规划 1.4 网络规范分配 二.安装前期准备工作 2.1 各节点系统时间校对 2.2 各节点关闭防火墙和 ...
- Linux平台 Oracle 11gR2 RAC安装Part2：GI安装
三.GI(Grid Infrastructure)安装 3.1 解压GI的安装包 3.2 安装配置Xmanager软件 3.3 共享存储LUN的赋权 3.4 使用Xmanager图形化界面安装GI 3 ...
- Linux平台 Oracle 11gR2 RAC安装Part3：DB安装
四.DB(Database)安装 4.1 解压DB的安装包 4.2 DB软件安装 4.3 ASMCA创建磁盘组 4.4 DBCA建库 4.5 验证crsctl的状态 Linux平台 Oracle 11 ...
- 测试Oracle 11gr2 RAC 非归档模式下，offline drop数据文件后的数据库的停止与启动测试全过程
测试Oracle 11gr2 RAC 非归档模式下,offline drop数据文件后的数据库的停止与启动测试全过程 最近系统出现问题,由于数据库产生的日志量太大无法开启归档模式,导致offline的 ...
- Oracle 11gR2 RAC 安装配置
1. 简介 Oracle RAC,全称real application clusters,译为"实时应用集群", 是Oracle新版数据库中采用的一项新技术,是高可用性的一种, ...
随机推荐
- 基于.Net实现前端对话框和消息框
关于前端对话框.消息框的优秀插件多不胜数.造轮子是为了更好的使用轮子,并不是说自己造的轮子肯定好.所以,这个博客系统基本上都是自己实现的,包括日志记录.响应式布局等等一些本可以使用插件的.好了,废话不 ...
- UVA 1203 - Argus(优先队列）
UVA 1203 - Argus 题目链接 题意:给定一些注冊命令.表示每隔时间t,运行一次编号num的指令.注冊命令结束后.给定k.输出前k个运行顺序 思路:用优先队列去搞,任务时间作为优先级.每次 ...
- Git 的BUG小结
Git 的BUG小结 Git 在push的时候出现了: fatal: The remote end hung up unexpectedly 在网上找了非常多 发现出现了下面错误提示也可能是同样的问 ...
- ionic模版引擎及循环
首先来个官方文档:http://ionicframework.com/docs/api/directive/ionList/ 1)ionic模型引擎的定界符是双大括号 {{}} 2)要使用什么模版变量 ...
- java.lang.OutOfMemoryError 错误分类
java.lang.OutOfMemoryError: Java heap space原因:Heap内存溢出,意味着Young和Old generation的内存不够.解决:调整java启动参数 -X ...
- Windows上Tomcat启动，服务中没有Tomcat
首先需要查看Tomcat的bin目录下是否有service.bat,如果没有需要去下载一版bin目录下有service.bat的Tomcat,只有Windows版本的Tomcat的bin目录下才有se ...
- lower()
lower() 用于把字符串中的大写字母转换成小写字母 In [1]: str = "Hello World" In [2]: str.lower() Out[2]: 'hello ...
- Linux下Redis集群环境的搭建
一.安装redis(使用redis3.0版本) 1.需要gcc环境,如果没有执行命令安装gcc yum install gcc-c++ 2.下载redis3.0的源码包并上传至服务器 3.解压源码包 ...
- CSS美化自己的完美网页
CSS美化自己的完美网页 CSS概述 css样式: css是英文Cascading Style Sheets的缩写,称为层叠样式表,用于对页面进行美化,CSS的可以使页面更加的美观.基本上所有的h ...
- php实现注册审核功能
本章主要实现注册之后审核通过的功能,共这几部分组成: 1. 创建数据库:mydb数据库的user表 注:isok判断是否通过审核,1为通过,0为未通过. 显示效果: 2.首先做注册界面:zhuce ...