https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:89412348059

You Asked

what is the use of TWO_TASK environment variable ?
where can we use it ?

and we said...

If you are in a Unix environment, you can normally set 2 environment variables:

ORACLE_HOME
ORACLE_SID that will connect you to a local database identified by that home and sid. If you wanted
to be able to connect to a remote database or a database on that machine via SQLNet, you
can also set: TWO_TASK = <tnsconnect string> The setting of TWO_TASK overrides the ORACLE_SID when set. You will not connecting to a
local database with two_task but rather using sqlnet to connect to a remote database. So, instead of: $ sqlplus scott/tiger@some_db I can: $ setenv TWO_TASK some_db
$ sqlplus scott/tiger and the @some_db is implied.
Tom, In the above example, some_db should have been resolved using tnsnames.ora on the box from
which we connect to the remote database. Is it correct? Thanks.

Followup   December  05, 2003 - 11:27 am UTC

yes, the "local machine"

it could come from a variety of sources on that machine

~/.tnsnames.ora
$ORACLE_HOME/network/admin/tnsnames.ora
/var/opt/oracle/tnsnames.ora
$TNS_ADMIN/tnsnames.ora for example
Why TWO? Why Task?
Thanks, Jan

Followup   March     05, 2007 - 2:15 pm UTC

because in days gone by - the 1980's - two tasks (having two tasks working together) just made 'sense'
Just like "modular code" and "subroutine" used to be commonly used... :)

转:what is TWO_TASK的更多相关文章

  1. Oracle碎碎念~2

    1. 如何查看表的列名及类型 SQL> select column_name,data_type,data_length from all_tab_columns where owner='SC ...

  2. Oracle的tnsnames.ora配置(PLSQL Developer)

    首先打开tnsnames.ora的存放目录,一般为D:\app\Administrator\product\11.2.0\client_1\network\admin,就看安装具体位置了. 步骤阅读 ...

  3. EBS中配置OAF

    配置EBS的OAF作者 redqq 16:09 | 静态链接网址 | 最新回复 (0) | 引用 (0) | ERP学习 载jdev 9.03.5带Oracle Applications Extens ...

  4. sqlplus使用(一)

    一,sqlplus 环境变量 sqlplus的环境变量(来自SQL*Plus® User's Guide and Reference Release 11.2) Parameter or Variab ...

  5. Ways to access Oracle Database in PostgreSQL

    Today, organizations stores information(data) in different database systems. Each database system ha ...

  6. 通过Instant Client包来使用SQL*PLUS

    1.首先下载两个程序包: Instant Client Package - Basic(或Instant Client Package - Basic Lite)包 Instant Client Pa ...

  7. oracle client server那点事

    oracle网络配置三个配置文件 listener.ora.sqlnet.ora.tnsnames.ora ,都是放在$ORACLE_HOME\network\admin目录下. 1.  sqlnet ...

  8. 转 : 如何用sys as sysdba权限连接数据库进行EXP/IMP

    使用sys as sysdba权限进行EXP/IMP与其它用户稍有不同,详细内容如下(摘自metalink) Applies to: Oracle Server - Enterprise Editio ...

  9. SQL*Plus快速入门

    连接数据库sqlplus hr@\"//mymachine.mydomain:port/MYDB\" --连接到MYDB数据库的一个HR数据集里sqlplus hr@MYDB -- ...

随机推荐

  1. open MMT.distributions = null on transaction type: WIP Lot Split

    open MMT.distributions = null on transaction type:  WIP Lot Split       打开物料事务处理界面,发现事务处理类型为:WIP Lot ...

  2. Azure 媒体服务发布可靠的视频直播平台

    Sudheer Sirivara Azure 媒体服务总监 两个月前,Azure 媒体服务发布了视频直播和内容保护产品的公共预览版.这一 Internet规模的直播解决方案已被十余家业界领先的国际广播 ...

  3. boundingRectWithSize 的使用, 计算UILable高度, 包含Emoji及多属性string.

    iOS的文字高度计算一直是个问题, 苹果也一直在改, 这几天看了一下 boundingRectWithSize 方法. - (CGRect)boundingRectWithSize:(CGSize)s ...

  4. tomcat7 使用log4j进行日志记录

    将 tomcat-juli.jar 文件放置到 $CATALINA_BASE/bin 目录(实际上,该目录下已经有了) 从 log4j 网站下载 jar 包,并放置于 $CATALINA_BASE/l ...

  5. [King.yue]EXT.NET TextFieldFor添加正则表达式

    EXT.NET TextFieldFor添加正则表达式以及提示用法 例:Html.Y().TextFieldFor().Regex("此处添加正则表达式") .InvalidTex ...

  6. [Andrew]Ext.net Grid常用js

    var gridFunction= function (gridId) {                //获取当前Grid                var gridView = Ext.ge ...

  7. [Jacky] 解决Ext.Net GridPanel 选择的行数据刷新后不能获取最新值

    选择GridPanel中一行数据,当变更数据时并重新刷新之后不能获取最新值,需通过如下方式获取: var internalId = gridPanel.getSelectionModel().getL ...

  8. xampp 访问出现New XAMPP security concept 或者 新しいXAMPPのセキュリティコンセプト

    出现如下错误: 新しいXAMPPのセキュリティコンセプト: は.要求されたオブジェクトへのアクセスは.ローカルネットワークから入手可能です. この設定は.ファイル"で設定することができますの ...

  9. Phonegap3.4 教程

    英文原扯:http://coenraets.org/blog/cordova-phonegap-3-tutorial/ 我只是对着原文学习一遍,记录在这里,一来为了加深印象(边翻译边学习),二来为了自 ...

  10. bzoj 3196 Tyvj 1730 二逼平衡树(线段树套名次树)

    3196: Tyvj 1730 二逼平衡树 Time Limit: 10 Sec  Memory Limit: 128 MBSubmit: 1807  Solved: 772[Submit][Stat ...