基于Hadoop的設(shè)施蔬菜大數(shù)據(jù)分析
【文章頁(yè)數(shù)】:70 頁(yè)
【學(xué)位級(jí)別】:碩士
【部分圖文】:
圖1.3技術(shù)路線圖??Fig.?1.3?Technology?Roadmap??1.5論文結(jié)構(gòu)??
?河北農(nóng)業(yè)大學(xué)碩士學(xué)位(畢業(yè))論文???開始???_[?}??數(shù)據(jù)采集????I?1???Hadoop平臺(tái)??i,?]r?.?I? ̄ ̄?I??/種S?積丨丨品種數(shù)據(jù)丨I產(chǎn)量數(shù)據(jù)I?1銷量數(shù)據(jù)丨I產(chǎn)值數(shù)據(jù)丨??I?數(shù)據(jù)!?i?I?I?I?!?I?I?I??I??數(shù)據(jù)預(yù)測(cè)??V?V?....
圖2.2?HDFS體系結(jié)構(gòu)??Fig.2.2?Architecture?of?HDFS??HDFS的讀取策略為:??1.副本存放及讀取策略??12??
讀寫請(qǐng)求NameNode?^??塊信息??\、??/?、山?、'??^?、、,?、、??\?客戶知?)?I?DataNode?DataNode?!??^讀?備份Z?^?—?一機(jī)架2??……--…….?一一'”?‘—^?/?/??|?DataNode?DataNode?!?一?/?....
圖2.4?Map?Reduce工作流程??Fig.2.4?Workflow?of?Map?Reduce??
:??input?Split??:??與排序??一.???parti?:?;????,,?**?—??>:,'?R^clyce'???■一?一一??,一?:part2?:?j?map?-?一?一一一??F"e.?fr¥^M??隨■、.?■?.圓、???nn??'、、、??t?二;....
圖2.5?HBase系統(tǒng)架構(gòu)??Fig.2.5?System?architecture?of?HBase??
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