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下面尝试搭建一个包含3个节点的mongodb Replica Set。 其中一个为PRIMARY节点,其他两个为SECONDARY节点。 ...
(1)CAST(数据 as 类型) convert(类型 ,数据)SELECT '123'+CAST('456' AS varchar)SELECT '123'+CONVER ...
1. 你觉得Spark和Hadoop的区别是什么,请简要说一说? 我:Hadoop适合离线分析,是批处理;Spark适合实时分析, ...
1.准备环境(JDK和Hadoop)$ tar -zxf hadoop-2.5.2.tar.gz -C /opt/app/ // 卸载Linux自带java,安装jdk1.8, ...
ByRachel Howard, Community Editor | March 17, 2017 “Moving from relational to graph, it takes ...
Big data software company Cloudera will announce new data science software later this week at the S ...
作者:马小龙,浙江财经大学数据分析和大数据计算的客座教授。2006年在德国不来梅大学获得数学博士学位后, ...
We are excited to announce thatAmazon ElastiCache now supports enhanced Redis Backup and Restore wi ...
Keycloak 3.0.0.CR1 发布了,带来了一些新功能。 下载地址 该版本是首个不支持 Mongo 的版本。 ...
This blog post is another in the series on the Percona Server for MongoDB 3.4 bundle release. In thi ...

Graph Database

[ 2017-03-18 18:33:01 | by 店小二04 ]
The wikipedia defintion of a graph databases is " In computing, a graph database is a database tha ...
PouchDB-CouchDB sync via Service Workers, as goofily illustrated on the author’sSurface ...
This morning, I setup Nutch 2.2.1 with Cassandra, when I run Nutch, it didn't work, I checked the lo ...
Vue Pouch DB Vue Pouch DB is a VueJS Plugin that binds PouchDB with Vue and keeps a synchronised ...
pom.xml添加相关依赖 parent groupIdorg.springframework.boot/groupId ...

News of Sanakirja

[ 2017-03-18 15:21:01 | by 店小二04 ]
We’ll release a usable version of Pijul later today. Pijul itself is in an alpha stage, but is base ...
Data administration is a crucial task in the modern business environment. As more businesses go onli ...
At Appaloosa , we have been providing stats on apps downloads and usage for more than two years. ...
For the last 6 years, we’ve used MongoDB as our time series datastore for graphing and metrics sto ...

From Riak to Kafka: Part I

[ 2017-03-18 15:25:02 | by 店小二05 ]
In Apache Kafka at Spreedly: Part I Building a Common Data Substrate Ryan introduced the place Ka ...
Billy Bosworth, DataStax CEO DataStax, one of the leading NoSQL vendors, has today unveiled a ...

Neo4j on Mesosphere DC/OS

[ 2017-03-18 15:27:01 | by 店小二03 ]
By Johannes Unterstein Jrg Schad , Mesosphere | March 15, 2017 (dcos)--(instanc ...
In this chapter, we are going to learn about the concept of Capped collections in MongoDB. When we i ...
Introducing NoSQL and MongoDB to Relational Database professionals 0 By Lucas Jell ...
Mesosphere DC/OS, the datacenter automation solution built atop theApache Mesos orchestration syste ...
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