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PASS Summit Live Keynote Release 4
Document DB: Blazing fast planet-scale NoSQL: Guaranteed Low Latency Elastically Scaling Storage Elastically Scaling Throughput No Impedance Mismatch Choice of Consistency Enterprise Level SLA Azure +...
View ArticleConfiguring a MongoDB replica set for analytics
MongoDB replica sets make it easy for developers to ensure high availability for their database deployments. A common replica set configuration is composed of three member nodes: two data-bearing nodes...
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The Neo4j-Tableau Integration You’ve Been Asking for
By Dave Fauth & Michael Hunger , Neo4j Team | October 27, 2016 Based on the excellent work of our partner Ralf Becher from TIQ Solutions , a Qlik, Tableau and Neo4j expert, we are very happy to...
View ArticleMark Needham: Neo4j: Dynamically add property/Set dynamic property
I’ve been playing around with a dataset which has the timetable for the national rail in the UK and they give you departure and arrival times of each train in a textual format. For example, the node to...
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Replex: A scalable, highly available multi-index data store
Replex: A scalable, highly available multi-index data store Tai et al. USENIX 2016 Today’s choice won a best paper award at USENIX this year. Replex addresses the problem of key-value stores in which...
View Article新闻评论: 也谈 RethinDB 的倒掉
这两天我好像对新闻特别有意见，今天早上看到的新闻是 InfoQ 的这篇 从RethinkDB的倒闭反思开源项目可持续的盈利模式 ，还请来国内开源圈的韩卿和刘奇评论，当然，他们没问我如何看待，如果问了我就没这么多吐槽了，哈哈。 朋友圈里，我可能是最早关注 RethinkDB 倒掉这个新闻的，只是有用户在抱怨 RethinkDB 好像停止开发了的时候我就关注了，不过这是因为我们（ Hyper.sh...
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NoSQL先驱RethinkDB倒掉后，借此来看开源新型数据库NewSQL的未来
作者：黄东旭 最近数据库圈的一个比较大的事件是 NoSQL 先驱之一的 RethinkDB 的关张大吉，RethinkDB这个事情本身我就不多做评论了，现在这个时机去分析不免有马后炮的嫌疑，今天我想借着这个引子谈谈新型数据库的未来。 36大数据（http://www.36dsj.com/）...
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《编写可读代码的艺术》读书笔记
《编写可读代码的艺术》 真是一本好书，读完之后收获很多，再回头看自己写的代码，真特么恶心。如何写优秀的代码？优雅的代码？牛逼的代码呢？ 我总结了下面几点： 1. 掌握该门语言良好的编程风格和规范。 2. 熟练该门语言的语法和标准库，这是关键。 3. 多阅读和参与一些牛逼的开源代码，从别人的代码中汲取养分。 4. 学习设计模式、软件架构等理论基础。 这本书呢，很全面，...
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MongoDB高可用集群配置
摘要： 高可用性即HA（High Availability）指的是通过尽量缩短因日常维护操作（计划）和突发的系统崩溃（非计划）所导致的停机时间，以提高系统和应用的可用性。 >>高可用集群的解决方案 高可用性即HA（High Availability）指的是通过尽量缩短因日常维护操作（计划）和突发的系统崩溃（非计划）所导致的停机时间，以提高系统和应用的可用性。...
View ArticleCouchDB Weekly News, October 27, 2016
Major Discussions Checking for cluster peers using SRV records on startup (see thread ) Adam Kocoloski proposes easing the onramp for users to get a clustered CouchDB setup running by utilizing the SRV...
View ArticleBenchmarketing MyRocks
I have been spending time understanding MyRocks performance for new workloads including benchmarks that potential MyRocks users run. One of those benchmarks is sysbench and I wrote a script to make it...
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Run Amazon DynamoDB locally with Docker
tl;dr:Run DynamoDB locally using Docker: docker run -d -p 8000:8000 dwmkerr/dynamodb Try it out by opening the shell, localhost:8000/shell : That's all there is to it! DynamoDB Amazon DynamoDB is a...
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Catalogs and Hierarchies
When I was younger, friends and I would play a role playing game called “ Shadowrun “. The game draws elements from science fiction, crime dramas, and magic and blends them all together to make a fun...
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Persisting Couchbase Data Across Container Restarts
Best Practices for Virtualized Platforms provide best practices for running Couchbase on a virtualized platform like Amazon Web Services and Azure. In addition, it also provide some recommendations...
View Article每日一博 | Redis 之 HyperLogLog 的小内存大用处
我们一直都知道， redis 几大常用数据结构，字符串、散列、列表、集合、有序集合。其实后来Redis做了很多补充，其中之一就是HyperLogLog，另外的还有GEO（地理位置），是3.2版本加的。 这里我们就来简单介绍下HyperLogLog结构。 先说用处：这个结构可以非常省内存的去统计各种计数，比如注册ip数、每日访问IP数、页面实时UV（PV肯定字符串就搞定了）、在线用户数等。...
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Redis（二）ShardedJedis一致性哈希
本文主要介绍一致性哈希的概念，以及在Redis中的ShardedJedis一致性哈希实现原理 1、非一致性哈希 在讨论一致性哈希之前，先认识下”非一致性哈希”，例如HashMap。 当使用HashMap时，key被均匀地映射到数组之上，映射方法就是利用key的hash与数组长度取模(通过&运算)。...
View Articlesetup gphdfs in docker
Setup gphdfs environment We need a running hdfs service. Please refer to (hdfs)[../1.html] We assume the gpdb is setup on local machine. Setup hadoop client Find the fastest mirror here . We will...
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Elasticsearch的安装和基本使用
Elasticsearch 是一个搜索服务器，特点：分布式、易于扩展、全文检索、索引速度快。一、安装因为 Elasticsearch 是 Java 开发的，所以要先安装 Java（下载）可用 java -version来查 看是否已安装Java若没有安装，且jdk 在 /usr/local/src/jdk-7u79-linux-x64.gz 目录下tar zxvf...
View Articlesql语句大全
一、基础 1、说明：创建数据库 CREATE DATABASE database-name 2、说明：删除数据库 drop database dbname 3、说明：备份sql server --- 创建 备份数据的 device USE master EXEC sp_addumpdevice 'disk', 'testBack', 'c:\mssql7backup\MyNwind_1.dat'...
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