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<p><FONT class=normalfont><B><font color=blue>oralce names server簡介</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者:作者<br>來自:http://www.fanqiang.com<br>聯(lián)系方式:無名<br><br>oracle names server 用最簡單的話說,就是將客戶端的 tnsnames.ora <br>
放到一臺server上,每臺客戶端在連接數(shù)據(jù)庫server時,由names server <br>
負責將 connect string 翻譯成 ip address+sid+port,完成連接。當然, <br>
每臺客戶端上都要做相應的配置,指明使用 names server 代替本地 <br>
tnsnames.ora ,并且需指明缺省的 names server 的地址和port。 <br>
<br>
使用 oracle names server 的好處是,所有客戶端,只用設置一次,將來 <br>
即使需要修改 tns 配置,也只需要修改 names server 上的東西,客戶端 <br>
不用再做任何修改。 <br>
<br>
下面就結(jié)合一個例子具體說說 oracle names server 的配置 <br>
<br>
1、在安裝 oracle 軟件時當然要選相應的組件。oracle names server <br>
需要一個schema來存儲 tns 配置,所以names server 需要oracle db <br>
建立這個schema的腳本是 $ORACLE_HOME/network/admin/namesini.sql <br>
<br>
首先建立一個用戶: <br>
create user names identified by names default tablespace users <br>
temorary tablespace temp; <br>
<br>
grant connect,resource to names; <br>
<br>
connect names/names <br>
<br>
@namesini.sql <br>
<br>
2、在數(shù)據(jù)庫server 端運行 net8 assistant(圖形界面的工具), <br>
建立 names server: <br>
點中 "NameServer" ,然后點“+”按鈕,根據(jù)向?qū)У奶崾纠^續(xù), <br>
首先填 names server 的名字,比如:ns1 <br>
然后選用協(xié)議,我只會選 tcp/ip ,主機當然就是這臺機器, <br>
port用推薦的1575 <br>
<br>
選 “use a region database”這個是和多names server 有關的選項, <br>
我們可以先不理會,使用缺省值。 <br>
<br>
填寫數(shù)據(jù)庫相關信息:主機、sid、port、schema(這里就是我們剛才 <br>
創(chuàng)建的用戶:names/names) <br>
<br>
select NameServer is in the root region. <br>
<br>
完成,保存設置,會生成 names.ora <br>
<br>
3、使用 names server 代替本地的 tnsnames.ora: <br>
還是在net8 assistant 里,點 profile ,在naming method 里只選 onames.<br>
<br>
<br>
4、指定客戶端使用的names server(在這里,這臺server既是服務器又是客戶端<br>
): <br>
從下拉菜單中選 Preferred Oracle NameServer,在這頁里填上names server<br>
<br>
的ip address + port. <br>
<br>
5、保存設置,退出 <br>
在命令行方式下: <br>
<br>
namesctl <br>
<br>
namesctl>start <br>
<br>
6、將tns配置加入到oracle names server 的repository里: <br>
<br>
使用 net8 assistant <br>
選中剛才建立的 nameserver : ns1 <br>
從下拉菜單中選擇 manage data <br>
可以從一個tnsnaems.ora文件直接load進去,但是我老沒成功, <br>
只好一個一個手工加。(也許是沒運行namesupg.sql的原因,可文檔 <br>
里說是可選的,不明白) <br>
<br>
每寫一個點一下 execute ,比如: <br>
Service Name = test <br>
Protocol = TCP <br>
Host = 192.168.2.99 <br>
Port = 1521 <br>
SID = test <br>
<br>
很簡單,不用多說了。 <br>
<br>
7、用sqlplus測試一下: <br>
sqlplus system/manager@test <br>
如果連接沒問題,就可以把sqlnet.ora復制到各個客戶端,就可以用了。 <br>
<br>
sqlnet.ora的樣子大概應該是這樣: <br>
<br>
...... <br>
names.preferred_servers = (address_list = <br>
(address=(protocol=tcp)(host=192.168.2.99)(port=1575)) <br>
) <br>
names.directory_path = (onames) <br>
...... <br>
<br>
<br>
<br>
以前一直沒用過 oracle names server,既然有人問, <br>
就研究了一下,不過我介紹的只是oracle names server最基本的功能, <br>
其他oracle 8i版本的names server的新功能,等我有時間再說吧,或者 <br>
哪位高手有興趣,也可以繼續(xù)深入。 <br>
<br>
結(jié)束<br>
</FONT><br>
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