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Replex: A Scalable, Highly Available Multi-Index Data Store
This paper received the best paper award at Usenix ATC'16 last week. It considers a timely important problem. With NoSQL databases, we got scalability, availability, and performance, but we lost...
View Articlebaeldung - Coding and Testing Stuff: Introduction to Spring Data Neo4j
1. Overview This article is an introduction to Spring Data Neo4j , the popular graph database. Spring Data Neo4jenables POJO based development for the Neo4j Graph Database and uses familiar Spring...
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Securing MongoDB User Administration
The db. createUser ( user , writeConcern ) method used to create users.We need to provide the username, password and roles The definition of createUser as follows { user: "<name>", pwd:...
View ArticleThere and Back Again: The MongoDB Cloud Story
For the better part of the last decade, MongoDB has more or less played the part of the traditional on premise software vendor. Its model necessarily differed in important ways from that of its closed...
View ArticleThe plot thickens: Converged vs. connected in the data apps race | #HS16SJ
Some say that 2016 will be the moment of truth for Big Data. Hype has steadily gathered around data for the past few years, and it seems now to have reached fever pitch. At the conferences, in the...
View ArticleMySQL/MariaDB cursors and temp tables
In MariaDB and mysql, cursors create a temporary table. Does this statement deserve a whole blog post? Apparently not. However, in some cases one does not expect a temporary table to be created: SELECT...
View Article数据库复习（3）
3.1 SQL概述 SQL 功能 动词 数据查询 SELECT 数据定义 CREATE, DROP, ALTER 数据操纵 INSERT, UPDATE, DELETE 数据控制 GRANT, REVOKE SQL支持关系数据库三级模式结构 <作图>基本表 存储文件 视图 3.2 学生-课程数据库学生表 | Student(Sno,Sname,Ssex,Sage,Sdept)课程表 |...
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Introducing the Neo4j 3.0 Apache Spark Connector
ByMichael Hunger, Developer Relations | June 8, 2016 We proudly want to participate in this week’s flurry of announcements around Apache Spark. While we’re cooperating with Databricks in other areas...
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Apache Kudu in 5 minutes
Apache Kudu is a data storage technology that allows fast analytics on fast data. Cloudera kickstarted the project yet it is fully open source. Kudu provides fast insert and update capabilities and...
View Articleapache cassandra 1.0.8 on READ_STAGE threads reference on sstables and so...
Back then when I was administer a apache cassandra 1.0.8 cluster, I noticed there were some (very little) sstables did not get remove even after compaction is done. The leftover sstables cause some...
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Redis 订阅 Java实现
转载请标明出处 http://coderknock.com 源码：http://git.oschina.net/sanchan/SparkJsonRedis 消息publish端 ```java import redis.clients.jedis.Jedis; import redis.clients.jedis.JedisPool; import...
View ArticleHive on Hbase 整合测试
Hbase做为一个k-v查询系统，被使用在海量数据简单查询应用中。有时候会有一些复杂查询操作，需要写很多nosql的脚本或者程序！为了降低使用门槛，而sql的通用性，让大家都往sql on hbase方向发展： 1、支持友好的sql语法 2、通用型的odbcjdbc接口 3、对接主流bi可视化工具 4、开箱即用无缝兼容对接 基于上面的想法，很多公司脑洞大开，做了一些中间解决方案，比如： 1、hive...
View ArticleHBase Schema Design Example
This post discusses an HBase schema modelling exercise I went through sometime in 2015 but did not get to write about it till today. This is based on the Healthcare data sets. Here is a brief...
View ArticleMongoDB Java api: using a sequence collection with findAndModify
MongoDB doesn’t have an equivalent of sequences typically used in relational databases, since documents are automatically given a unique ObjectId value for the “_id” property when inserted. To return...
View ArticleHypermedia APIs with Apache CouchDB
byBenjamin Young | No Comments Development RESTful web services are a thing I love to discuss, build, and use. However, most of them stop short at sending JSON (or XML) back and forth over the wire. I...
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Using MapR, Mesos, Marathon, Docker, and Apache Spark to Deploy and Run Your...
This blog post describes steps for deploying Mesos, Marathon, Docker, and Spark on a MapR cluster, and running various jobs as well as Docker containers using this deployment. Here are the components...
View Article[iOS] Swift 版 Redis 客户端 API
Redbird Redis + Swift. Red Is Swift. Swift is a bird. Redbird. Attempt at a pure-Swift implementation of a Redis client from the original protocol spec. Redis communication protocol specification:...
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Redis学习笔记（二）-key相关命令
Redis支持的各种数据类型包括string，list ，set ，sorted set 和hash . R edis本质上一个key-value db，所以我们首先来看看他的key。首先key也是字符串类型，但是key中不能包括边界字符。 由于key不是binary safe的字符串，所以像"my key"和"mykey\n"这样 包含空格和换行的key是不允许的。...
View Article使用Redis的五个注意事项
标签： redis 注意 | 发表时间：2016-07-03 08:18 | 作者：chenzng 出处：http://www.iteye.com 转自：http://blog.nosqlfan.com/html/3705.html 下面内容来源于Quora上的 一个提问 ，问题是使用 Redis...
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Deploying an ArangoDB 3 Cluster with 2 Clicks
Hurray! Last week finally saw the release ofArangoDB 3.0 with lots of new features and in particular various improvements for ArangoDB clusters. In this blog post, I want to talk about one aspect of...
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