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SpringXD on yarn 使用Container工作组
SpringXD on Yarn支持Container分组。可以更好的控制admin和container分配。 控制组内成员 以组单位整体控制生命周期 动态创建组 重启失败的容器 实际上，XD on Yarn有内置分组admin和container。结合例子使用： 查看分组列表： bin/xd-yarn clustersinfo -a application_1472450074786_0160...
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Peter Zaitsev: MongoDB Troubleshooting: My Top 5
In this blog post, I’ll discuss my top five go-to tips for MongoDB troubleshooting. Every DBA has a war chest of their go-to solutions for any support issues they run into for a specific technology....
View ArticleDataLayer: Scylla, the High-Performance Cassandra-Successor
At DataLayer, we brought in Eyal Gutkind, solution architect for Scylla, to present on ScyllaDB, a drop replacement for Cassandra. In his talk, Eyal introduces the database and discusses how it...
View ArticleCloudant Change Trigger no Longer Supports “includeDoc”
In using Cloudant package for IBM Bluemix OpenWhisk, there has been an option to use a parameter (‘includeDoc’), which attaches a specified document to the change feed. This parameter will be no longer...
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Rump: Hot-sync two Redis databases using dumps
We're thrilled to announce our first open source project: Rump ! Rump is a tiny little tool focused on one simple thing: getting live data out of an AWS ElastiCache Redis cluster. We faced this...
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SnapLogic 2017 Predictions: Finding Dumbo - The Great Pachyderm Migration to...
Virtualization and Cloud executives share their predictions for 2017. Read them in this 9th annual VMblog.com series exclusive. Contributed by Shayne Hodge, Data Scientist at SnapLogic Finding Dumbo...
View ArticleRedis 4.0 新功能简介
Redis 的作者 antirez 在三天之前通过博客文章《 The first release candidate of Redis 4.0 is out 》发布了 Redis 4.0 的第一个 RC 版本， 在博文中他说， 因为这个新版本的 Redis 出现了多项改变， 所以他决定从原来的 3.x 版本直接跳到 4.0 版本， 以此来强调这次更新的变化之大。 本文将对 Redis 4.0...
View ArticleRedis学习笔记五【Redis命令(二)】
常用命令： 命令 描述 HMGET 从散列中获取一个或多个值 HMSET 为散列中的一个或多个键设值 HDEL 删除散列中一个或多个值，返回成功删除的键值对数量 HLEN 返回散列包含的键值对数量 //批量设值 127.0.0.1:6379> hmset hash-key k1 v1 k2 v2 k3 v3 OK //批量获取值 127.0.0.1:6379> hmget...
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Installing RavenDB 4.0 on your Raspberry PI 3
The easiest way to do it is go to the RavenDB Raspberry PI page and download the image, after download, you’ll have: The next step is to extract the file, giving us the disk image. Next, we need to...
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AWS launches batch processing service in preview
At its re:Invent user conference in Las Vegas today, public cloud infrastructure provider Amazon Web Services (AWS) announced the launch of AWS Batch, a service for automating the deployment of batch...
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Learn the Concept of Collections in MongoDB
In this chapter, we are going to understand the concept of collections in MongoDB. MongoDB has a method known as a collection method and is used to create a collection. It has the following syntax....
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SAS integration with Hadoop one success story
Nearly every organization has to deal with big data, and that often means dealing with big data problems. For some organizations, especially government agencies, addressing these problems provides more...
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深入剖析 redis 数据结构 dict
redis 的键值对存储在哪里 在 redis 中有多个数据集，数据集采用的数据结构是哈希表，用以存储键值对。默认所有的客户端都是使用第一个数据集，如果客户端有需要可以使用 select 命令来选择不同的数据集。redis 在初始化服务器的时候就会初始化所有的数据集： void initServer() { ...... // 分配数据集空间 server.db =...
View ArticleRedis 3.2.6 稳定版和 4.0-rc2 发布
Redis 3.2.6 和 4.0-rc2 发布了，Redis 是一个高性能的key-value数据库。 redis的出现，很大程度补偿了memcached这类keyvalue存储的不足，在部分场合可以对关系数据库起到很好的补充作用。它提供了python，Ruby，Erlang，php客户端，使用很方便。 v3.2.6： 紧急升级程度 MODERATE：GEORADIUS，BITFIELD 和...
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A Data Engineer's Guide To Non-Traditional Data Storages
Data Engineering With the rise ofbig data and data science, many engineering roles are being challenged and expanded. One new-age role is data engineering . Originally, the purpose of data engineering...
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Connect 2016 Developer Workshop
For the first day of Couchbase Connect 2016, I created a full-day developer’s workshop (with the help of our great SDK team, of course). It was great meeting some of our customers and helping people...
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Move over Memcached and Redis, here comes Netflix's Hollow
A new open source project released by Netflix after two years in internal use is being positioned by the company as a powerful way to cache datasets that change constantly. Hollow is a Java library...
View ArticlePuppet Labs: What's new in modules for November 2016
Happy Holidays! It’s been a busy November on the Forge, with lots of updates to our more popular modules. This month there are updates to our Azure, PowerShell and DSC modules ― and more. We have...
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Redis源码剖析--跳跃表zskiplist
跳跃表是一种有序的数据结构，它通过在每个节点中维持多个指向其他节点的指针，从而达到快速访问的目的。跳跃表在插入、删除和查找操作上的平均复杂度为O（logN），最坏为O（N），可以和红黑树相媲美，但是在实现起来，比红黑树简单很多。...
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