基于Hadoop的设施蔬菜大数据分析
【文章页数】:70 页
【学位级别】:硕士
【部分图文】:
图1.3技术路线图??Fig.?1.3?Technology?Roadmap??1.5论文结构??
?河北农业大学硕士学位(毕业)论文???开始???_[?}??数据采集????I?1???Hadoop平台??i,?]r?.?I? ̄ ̄?I??/种S?积丨丨品种数据丨I产量数据I?1销量数据丨I产值数据丨??I?数据!?i?I?I?I?!?I?I?I??I??数据预测??V?V?....
图2.2?HDFS体系结构??Fig.2.2?Architecture?of?HDFS??HDFS的读取策略为:??1.副本存放及读取策略??12??
读写请求NameNode?^??块信息??\、??/?、山?、'??^?、、,?、、??\?客户知?)?I?DataNode?DataNode?!??^读?备份Z?^?—?一机架2??……--…….?一一'”?‘—^?/?/??|?DataNode?DataNode?!?一?/?....
图2.4?Map?Reduce工作流程??Fig.2.4?Workflow?of?Map?Reduce??
:??input?Split??:??与排序??一.???parti?:?;????,,?**?—??>:,'?R^clyce'???■一?一一??,一?:part2?:?j?map?-?一?一一一??F"e.?fr¥^M??隨■、.?■?.圓、???nn??'、、、??t?二;....
图2.5?HBase系统架构??Fig.2.5?System?architecture?of?HBase??
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