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https://kafka.apache.org/intro.html
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posted @ 2017-10-31 17:03
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https://kafka.apache.org/intro.html Kafka as a Messaging System How does Kafka's notion of streams compare to a traditional enterprise messaging syste
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posted @ 2017-10-31 12:03
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posted @ 2017-10-31 11:22
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posted @ 2017-10-31 11:21
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https://spark.apache.org/sql/ Performance & Scalability Spark SQL includes a cost-based optimizer, columnar storage and code generation to make querie
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posted @ 2017-10-31 00:10
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sparksql hive https://databricks.com/blog/2014/07/01/shark-spark-sql-hive-on-spark-and-the-future-of-sql-on-spark.html https://cwiki.apache.org/conflu
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posted @ 2017-10-30 23:43
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https://github.com/pingcap/tispark/commit/dcca23bfa1aa0c356a4280d82bc8301c0de08318
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posted @ 2017-10-30 20:56
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SQL processing uses the following main components to execute a SQL query: The Parser checks both syntax and semantic analysis. The Optimizer uses cost
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posted @ 2017-10-30 20:01
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https://en.wikipedia.org/wiki/Groovy_(programming_language) Groovy offers simple, consistent syntax for handling lists and maps, reminiscent of Java's
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posted @ 2017-10-30 19:54
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https://docs.oracle.com/javase/tutorial/essential/exceptions/try.html https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html An object
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posted @ 2017-10-30 17:20
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ThrowableClass Error (unchecked) Exception IOException (checked) RuntimeException (unchecked)
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posted @ 2017-10-30 14:58
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This is for MyHDFSCat = 18+3
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posted @ 2017-10-30 10:04
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$ wc --helpUsage: wc [OPTION]... [FILE]... or: wc [OPTION]... --files0-from=FPrint newline, word, and byte counts for each FILE, and a total line ifmo
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posted @ 2017-10-29 16:43
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读取标准输入 #include "thread.h" #include "thread-sync.h" int n, count = 0; mutex_t lk = MUTEX_INIT(); void Tproduce() { while (1) { retry: mutex_lock(&lk);
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posted @ 2017-10-29 16:08
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posted @ 2017-10-29 15:59
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posted @ 2017-10-29 14:04
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sh UNIX shell Bourne Again Shell
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posted @ 2017-10-29 11:27
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zookeeper 信息保管员 YARN 简介 https://www.ibm.com/developerworks/cn/data/library/bd-yarn-intro/index.html
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posted @ 2017-10-29 11:10
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https://www.xenproject.org/ The Xen ProjectTM is the leading open source virtualization platform that is powering some of the largest clouds in produc
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posted @ 2017-10-28 21:13
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小结: 1、A file descriptor is considered ready if it is possible to perform the corresponding I/O operation (e.g., read(2)) without blocking. UNIX网络编程卷1:
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posted @ 2017-10-28 12:58
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32:+:1 x:1 x<=8 https://flume.apache.org/FlumeUserGuide.html#flume-topology-design Flume topology design 【拓扑 分层原因 0-缓冲1-路由】 The first step in designin
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posted @ 2017-10-28 09:26
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A page, memory page, or virtual page is a fixed-length contiguous block of virtual memory, described by a single entry in the page table. It is the sm
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posted @ 2017-10-28 02:48
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zh.wikipedia.org/wiki/面向服务的架构 【程序功能做为服务】 面向服务的体系结构(英语:service-oriented architecture)是构造分布式計算的应用程序的方法。它将应用程序功能作为服务发送给最终用户或者其他服务。 它采用开放标准、与软件资源进行交互并采用表示
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posted @ 2017-10-27 22:31
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https://en.wikipedia.org/wiki/WildFly 【实现基于面向服务的架构SOA的web应用和服务】 WildFly,[1] formerly known as JBoss AS, or simply JBoss, is an application server auth
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posted @ 2017-10-27 22:23
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【hibernate ORM 是对象关系映射框架 事实上的持久化存储引擎】 http://docs.jboss.org/hibernate/orm/5.2/userguide/html_single/Hibernate_User_Guide.html Object/Relational Mappin
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posted @ 2017-10-27 21:46
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https://en.wikipedia.org/wiki/New_I/O_(Java) zh.wikipedia.org/wiki/Java_NIO Java NIO API提供在java.nio套件或其子套件中。 緩衝區的基本資料類型 字元集的編碼器和解碼器 基於Perl風格的正則表達式(在 j
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posted @ 2017-10-27 21:25
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posted @ 2017-10-27 16:54
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http://azkaban.github.io/azkaban/docs/2.5/ There is no reason why MySQL was chosen except that it is a widely used DB. We are looking to implement com
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posted @ 2017-10-27 16:50
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root@oneweek:~# ssh -i uat.pem root@110.5.15.6@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ WARNING: UNPROTECTED PRIVATE KEY FILE! @@@@
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posted @ 2017-10-27 16:06
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https://www.ibm.com/developerworks/cn/opensource/os-cn-kafka/index.html 周 明耀2015 年 6 月 10 日发布 示例:网络游戏 示例:网络游戏 假设我们正在开发一个在线网络游戏平台,这个平台需要支持大量的在线用户实时操作,玩
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posted @ 2017-10-27 14:46
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实践 3) 通过连表mysql,字段值IS NOT NULL,实现数据分流 CREATE TEMPORARY TABLE `nocache_table_test` ( `device_id` STRING) WITH ( 'connector' = 'rds', 'username' = 'acfo
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posted @ 2017-10-27 14:43
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netty Netty: Home http://netty.io/ Netty is an asynchronous event-driven network application framework for rapid development of maintainable high perf
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posted @ 2017-10-27 13:31
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posted @ 2017-10-27 12:54
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posted @ 2017-10-27 10:11
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http://mina.apache.org/ Apache MINA is a network application framework which helps users develop high performance and high scalability network applica
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posted @ 2017-10-27 10:10
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Tired of Null Pointer Exceptions? Consider Using Java SE 8's Optional! https://www.oracle.com/technical-resources/articles/java/java8-optional.html Ti
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posted @ 2017-10-26 23:27
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hadoop不支持传统文件系统的挂载,使得流式数据装进hadoop变得复杂。 hadoo中,文件只是目录项存在;在文件关闭前,其长度一直显示为0:如果在一段时间内将数据写到文件却没有将其关闭,则若网络中断后,则我们得到的仅仅是一个空白文件;故:最好编写小文件,这样能尽快将其关闭 错误。 【mappe
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posted @ 2017-10-26 20:03
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3种解决办法 https://tech.meituan.com/mt-log-system-arch.html 基于Flume的美团日志收集系统(一)架构和设计 - https://tech.meituan.com/mt_log_system_arch.html 基于Flume的美团日志收集系统(一
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posted @ 2017-10-26 19:02
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https://flume.apache.org/FlumeUserGuide.html 【测试模拟】 a1.sources.r1.type = exec a1.sources.r1.command = tail -F /opt/data/access.log 【生产】
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posted @ 2017-10-26 18:29
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https://www.ibm.com/developerworks/cn/opensource/os-cn-kafka/index.html Kafka 与 Flume 很多功能确实是重复的。以下是评估两个系统的一些建议: Kafka 是一个通用型系统。你可以有许多的生产者和消费者分享多个主题。相
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posted @ 2017-10-26 17:57
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