测试:修订间差异

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新页面: (don't offer the possibility)    admin    zh-tw    (不提供這個項目)<br><em>but</em> display at least this many entries in r...
 
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(don't offer the possibility)&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;(不提供這個項目)<br>&lt;em&gt;but&lt;/em&gt; display at least this many entries in recentchanges and other subscription lists:&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;&lt;em&gt;但是&lt;/em&gt;在最新異動中顯示至少這些資料與其他訂購清單:<br>add document to category&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;新增這個類別的文件<br>added&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;已經新增<br>administration features are disabled for this wiki.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;管理功能是被關閉的。<br>admins&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;管理者<br>after how many days should old versions of a page be removed (0 for never)&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;一個舊版本的頁面要保留多少天?(0表示永久保留)<br>allow anonymous access&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;允許訪客存取<br>anonymous password&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;訪客密碼<br>anonymous session type&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;訪客連線種類<br>anonymous username&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;訪客暱稱<br>automatically convert pages with wiki-syntax to richtext (if edited)?&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;自動轉換wiki與法成為網頁格式(編輯後)?<br>block&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;鎖定<br>block / unblock hosts&nbsp;&nbsp; &nbsp;common&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;鎖定 / 解除鎖定主機<br>blocked ip address ranges&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;鎖定 IP 位址區段<br>cancel without saving&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;取消不儲存<br>changed&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;已經修改<br>changes by last author&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;最後一位作者的異動<br>choose your current time here, so the server may figure out what time zone you are in.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;在這裡選擇您目前的時間,系統會自動計算您所在位置的時區。<br>columns&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;欄位<br>compute difference&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;比對異動資料<br>converts the page to richtext&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;轉換成網頁<br>current version&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;目前版本<br>deleted&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;已刪除<br>deletes this page&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;刪除這一頁<br>difference between versions&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;版本之間的差異<br>differences in&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;版本差異<br>different languages can have different titles&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;不同的語言可以使用不同的標題<br>document last modified&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;最後異動日期<br>edit box&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;編輯區<br>edit this &lt;em&gt;archive version&lt;/em&gt; of this document&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;編輯這個文件的&lt;em&gt;保存版本&lt;/em&gt;<br>edit this document&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;編輯這個文件<br>edit with preview&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;編輯與預覽<br>editable&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;可編輯<br>editing&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;編輯中<br>emailaddress administrator&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;管理者信箱<br>enable free links&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;啟用自由連結<br>enable wiki links&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;啟用Wiki連結<br>enter here the maximum number of entries to display in a document's history list.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;輸入文件異動記錄最多顯示幾筆資料。<br>enter here the number of days of edits to display on recentchanges or any other subscription list.&nbsp; set this to zero if you wish to see all pages in recentchanges, regardless of how recently they were edited.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;輸入最新異動清單或其他訂閱清單要顯示資料的天數,如果您希望看到全部可以設為0 。<br>enter ip address range in form &lt;tt&gt;12.*&lt;/tt&gt;, &lt;tt&gt;34.56.*&lt;/tt&gt;, or &lt;tt&gt;78.90.123.*&lt;/tt&gt;&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;輸入 IP 位址區段,格式為 &lt;tt&gt;12.*&lt;/tt&gt;, &lt;tt&gt;34.56.*&lt;/tt&gt;, 或&lt;tt&gt;78.90.123.*&lt;/tt&gt;<br>error creating temporary file.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;建立暫存檔案時發生錯誤<br>error writing to temporary file.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;寫入暫存檔案時發生錯誤<br>everyone&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;所有人<br>find&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;搜尋<br>history&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;歷史<br>history display should show &lt;em&gt;all&lt;/em&gt; changes made by the latest author.&nbsp; otherwise, show only the last change made.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;歷史會顯示最後一位作者&lt;em&gt;所有&lt;/em&gt;的異動。<br>history lists&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;歷史清單<br>history of&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;歷史<br>interwikiprefix&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;Wiki文中前置字元<br>invalid page name.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;錯誤的頁面名稱<br>load&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;讀取<br>loads the named page in the given language, all change so far get lost !!!&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;讀取指定語言的頁面,所有的異動將會遺失!<br>lock / unlock pages&nbsp;&nbsp; &nbsp;common&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;鎖定 / 取消鎖定頁面<br>locked&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;已鎖定<br>name wiki home link&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;wiki 首頁連結<br>newer&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;更新<br>no never&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;從未<br>no only on request&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;否,只有在發出請求時<br>not set&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;未設定<br>older&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;更舊<br>on all pages&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;在全部頁面<br>only if browser supports a richtext-editor&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;請確認您的瀏覽器支援所見即所得編輯器<br>only on the first page&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;只在首頁<br>page '%1' not found !!!&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;找不到 '%1' 頁面!<br>path of the upload directory (has to be writable by the webserver!)&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;上傳檔案的路徑(網頁伺服器要能夠寫入!)<br>picture upload via richtext editor (leave the upload directory empty to disable the upload)&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;透過所見即所得編輯器上傳圖片(上傳資料夾空白表示停用上傳功能)<br>please contact the %1administrator%2 for assistance.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;請聯絡%1管理員%2。<br>preview&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;預覽<br>preview of current version&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;預覽目前版本<br>rate control / ip blocking disabled&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;評分控制 / 取消IP鎖定<br>readable by&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;可讀取<br>readonly&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;唯讀<br>recent changes&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;最新異動<br>renames page to the given name and language&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;指定名稱和語言來修改頁面<br>richtext&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;網頁<br>rows&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;列<br>save the changes and exit&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;儲存後離開<br>saves and continues editing&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;儲存後繼續編輯<br>search for&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;搜尋<br>see complete list (%1 entries)&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;顯示完整列表(%1 筆資料)<br>show a search&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;顯示搜尋<br>show the title of the wiki page&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;顯示 wiki 頁面的標題<br>site configuration&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;網站設定<br>summary&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;概要<br>summary of change&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;異動概要<br>the search returned no result!&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;沒有找到任何資料!<br>this page can not be edited.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;這篇文章無法邊擊<br>twin pages&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;重複頁<br>unblock&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;取消鎖定<br>updates the preview&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;更新預覽<br>url of the upload directory&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;上傳資料夾對應的網址<br>use this module for displaying wiki-pages&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;用這個模組來顯示 wiki 頁面<br>users&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;使用者<br>view document history&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;顯示文件歷史<br>visit %1 to set your user name&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;在 %1 設定您的名稱<br>warning: since you started editing, this document has been changed by someone else.&nbsp; please merge your edits into the current version of this document.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;注意:當您開始編輯後,這份文件也被其他人編輯過了,請整合您編輯的資料到目前的版本。<br>who should be able to edit this page&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;誰能夠編輯這份文件<br>who should be able to read this page&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;誰能夠閱讀這份文件<br>wiki&nbsp;&nbsp; &nbsp;common&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;Wiki<br>wiki administration&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;Wiki管理<br>wiki menu&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;Wiki選單<br>wiki startpage&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;wiki 首頁<br>writable by&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;可修改<br>yes always&nbsp;&nbsp; &nbsp;admin&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;全部皆是<br>you have been denied access to this site.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;您沒有權限瀏覽這個網站!<br>you have entered an invalid user name.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;您輸入了一個錯誤的名稱<br>you have exeeded the number of pages you are allowed to visit in a given period of time. please return later.&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;您在同一段時間裡存取了超過系統設定的資料量,請稍後再回來繼續閱讀。<br>you have no rights to view wiki content !!!&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;您沒有檢視這個頁面的權限!<br>your changes&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;您做的修正<br>your user name is "%1".&nbsp;&nbsp; &nbsp;wiki&nbsp;&nbsp; &nbsp;zh-tw&nbsp;&nbsp; &nbsp;您的帳號是 "%1"
== 利用 Cloudera 部署 Hadoop<br> ==
 
=== 前言<br> ===
 
Hadoop 是一个实现了 MapReduce 计算模型的开源分布式并行编程框架。MapReduce的概念来源于Google实验室,它是一个简化并行计算的编程模型,适用于大规模集群上的海量数据处理,目前最成功的应用是分布式搜索引擎。随着2007年底该模式Java开源实现项目Apache Hadoop的出现,使得程序员可以轻松地编写分布式并行程序,并将其运行于计算机集群上,完成海量数据的计算。近两年尤其是今年国内外采用MapReduce模型的应用也逐渐丰富起来,如像NTT KDDI和中国移动这类的电信公司采用该模型分析用户信息,优化网络配置;美国供电局采用该模型来分析电网现状;包括VISA和JP摩根在内的金融公司采用该模型来分析股票数据;包括Amazon和ebay在内的零售商和电子商务公司也开始采用该模型;甚至部分生物公司也采用该模型来进行DNA测序和分析。然而使用Hadoop主要的挑战是,开发Hadoop难度非常大,部署Hadoop难度也非常大,管理Hadoop的集群也难度非常大,教会新用户使用Hadoop软件难度非常大。好在Cloudera提供了非常简单的Hadoop的发布版本,目前大约75%的Hadoop新用户使用Cloudera。<br>  
 
=== 安装  ===
 
<br>

2010年1月29日 (五) 16:24的版本

利用 Cloudera 部署 Hadoop

前言

Hadoop 是一个实现了 MapReduce 计算模型的开源分布式并行编程框架。MapReduce的概念来源于Google实验室,它是一个简化并行计算的编程模型,适用于大规模集群上的海量数据处理,目前最成功的应用是分布式搜索引擎。随着2007年底该模式Java开源实现项目Apache Hadoop的出现,使得程序员可以轻松地编写分布式并行程序,并将其运行于计算机集群上,完成海量数据的计算。近两年尤其是今年国内外采用MapReduce模型的应用也逐渐丰富起来,如像NTT KDDI和中国移动这类的电信公司采用该模型分析用户信息,优化网络配置;美国供电局采用该模型来分析电网现状;包括VISA和JP摩根在内的金融公司采用该模型来分析股票数据;包括Amazon和ebay在内的零售商和电子商务公司也开始采用该模型;甚至部分生物公司也采用该模型来进行DNA测序和分析。然而使用Hadoop主要的挑战是,开发Hadoop难度非常大,部署Hadoop难度也非常大,管理Hadoop的集群也难度非常大,教会新用户使用Hadoop软件难度非常大。好在Cloudera提供了非常简单的Hadoop的发布版本,目前大约75%的Hadoop新用户使用Cloudera。

安装