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“MongoDB wasn’t designed in a lab. We built MongoDB from our own experiences building large-scale, high availability, robust systems. We didn’t start 阅读全文
posted @ 2017-11-21 22:29
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【客户的写请求全部发送至主节点】 Primary. The primary receives all write operations. Secondaries. Secondaries replicate operations from the primary to maintain an ide 阅读全文
posted @ 2017-11-21 18:01
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https://docs.mongodb.com/manual/tutorial/enable-authentication/ Overview Enabling access control on a MongoDB deployment enforces authentication, requ 阅读全文
posted @ 2017-11-21 17:03
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ermissions on /usr/local/mongodb/conf/keyFile are too open 阅读全文
posted @ 2017-11-21 12:29
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https://docs.mongodb.com/manual/reference/glossary/#term-master mongoThe MongoDB shell. The mongo process starts the MongoDB shell as a daemon connect 阅读全文
posted @ 2017-11-21 10:10
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# 阅读全文
posted @ 2017-11-21 09:33
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HDFS命令基本格式:Hadoop fs -cmd < args > HDFS命令基本格式:Hadoop fs -cmd < args > ls 命令 hadoop fs -ls / 列出hdfs文件系统根目录下的目录和文件 hadoop fs -ls -R / 列出hdfs文件系统所有的目录和文件 阅读全文
posted @ 2017-11-21 08:12
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【手动验证:任意2个节点间是否实现 双向 ssh免密登录】 弄懂通信原理和集群的容错性 任意2个节点间实现双向 ssh免密登录,默认在~目录下 【实现上步后,在其中任一节点安装\配置hadoop后,可以将整个安装目录scp复制到各个节点::::各个节点的文件内容是一样的!!!!】 3节点 spark 阅读全文
posted @ 2017-11-21 00:11
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