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识别:访问者来源、会话、访问者 HTTP 安全套接字层SSL :包含访问者的登录活动和加密密钥的交换 动态网页:在返回给访问者的每个网页中隐藏一个会话ID的字段来维护访问者状态 阅读全文
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[root@bigdata-server-02 /]# ps --help all Usage: ps [options] Basic options: -A, -e all processes -a all with tty, except session leaders a all with t 阅读全文
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https://en.wikipedia.org/wiki/SHA-3 阅读全文
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【熵增】 由无序到有序 http://spark.apache.org/docs/latest/rdd-programming-guide.html#shuffle-operations Shuffle operations Certain operations within Spark trigg 阅读全文
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每个job被划分为多个stage。划分stage的一个主要依据是当前计算因子的输入是否是确定的,如果是则将其分在同一个stage,从而避免多个stage之间的消息传递开销。 http://spark.apache.org/docs/latest/rdd-programming-guide.html 阅读全文
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data warehouse 阅读全文
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Apache HBase™ is the Hadoop database, a distributed, scalable, big data store. Use Apache HBase™ when you need random, realtime read/write access to y 阅读全文
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https://en.wikipedia.org/wiki/DevOps DevOps (a clipped compound of "development" and "operations") is a software engineering practice that aims at uni 阅读全文