数据库优化之泛泛而谈 数据库 数据库学习 数据库知识 数据库优化
为什么要做数据库优化？我们知道现在的网站所包含的数据越来越多，特别是大型电商网站那简直没法想象。而我们的数据又是存储在数据库中，每当用户访问网站操作商品时，程序都会对数据库中的数据进行操作。那么一旦访问量过大，数据库就会出现一系列的问题。这些问题不单是数据库本身的限制，还会因为设计不合理造成。以此可见，数据库的优化工作非常有必要的。常用的优化手段优化的大致流程为：查找、定位慢查询、并优化。常用的优化...
View ArticleAttackers start wiping data from CouchDB and Hadoop databases
It was only a matter of time until ransomware groups that wiped data from thousands of MongoDB databases and Elasticsearch clusters started targeting other data storage technologies. Researchers are...
View ArticleCouchDB Weekly News, January 19, 2017
Releases in the CouchDB Universe blue-cot 3.1.2 Bluebird promise-based CouchDB library with no surprises (in a good way) couchdb_connector 0.5.0 (Elixir) A connector for CouchDB with support for views...
View ArticlePowerShell for DBAs why I changed my mind.
Quick post today… I have been saying for several years that I don’t really need PowerShell to be an effective DBA. In most places that is true, but becoming less so. I’ve resisted writing complex PS...
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Detecting complex fraud in real time with Graph databases
As more and more businesses move to an increasingly online-focused operating model, they open up new attack vectors for fraudsters and often struggle to put adequate fraud detection safeguards in...
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MongoDB Ransomware is being sold online
January has been a rough month for anyone that a.) uses the popular MongoDB database software, and b.) doesn’t really know how to secure it. A flurry of ransomware attacks have targeted the platform ,...
View ArticleIntegration Tests and your Couchbase Application
Proper integration tests require a complete setup of your infrastructure. And this can be a litle hard to put in place sometimes, especially when you need to support your developer lapop, your CI node,...
View ArticleOverview of MongoDB Performance Monitoring
Monitoring components of a system, especially for performance, is the best (and really the only) way to ensure a consistent user experience and that all service levels are being achieved. System...
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How Discord Stores Billions of Messages Using Cassandra
Discord continues to grow faster than we expected and so does our user-generated content. With more users comes more chat messages. In July, we announced 40 million messages a day , in December we...
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MongoDB、Elasticsearch遭大范围劫持，如何才能让服务器免于灾难？
MongoDB事件之后，再起波澜 经过在MongoDB各服务器间长达数日的肆虐，一群恶意分子又开始将其劫持矛头指向ElasticSearch服务器，并要求受害者支付类似的赎金。 第一波针对ElasticSearch服务器所有者的打击发生于1月12日，其中部分受害者通过ElasticSearch论坛反映了相关情况。...
View ArticleStack Exchange Engineering with Nick Craver
Nick has written a number of excellent posts on nickcraver.com/blog which talk about hardware and architecture, and the software powering these extremely popular websites. I recommend referencing...
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Fast Data & Analytics ― SQL, NoSQL, IMDGs, Hadoop, Spark. What next?
Twenty years ago we were just learning how to hook up the new Java language to our relational database to run queries. Five years later and the first IMDGs are starting to appear on the scene and...
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Deploying a Secure Mini MapR Cluster with Docker on a Single AWS Instance
Introduction If you want to try out the MapR Converged Data Platform to see its unique big data capabilities but don’t have a cluster of hardware immediately available, you still have a few other...
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Miles to go ... - Arun Gupta: Analyze Donald Trump Tweets with Couchbase and...
AWS Serverless Lambda Scheduled Events to Store Tweets in Couchbase explained how to store tweetsin Couchbase using AWS Serverless Lambda. Now, this Lambda Function has been running for a few days and...
View ArticleOrientDB 2.2.15 发布，文档数据库
OrientDB 2.2.15 发布了，Orient DB 是一个可伸缩的文档数据库，支持 ACID 事务处理。 值得关注的增强： The Schema panel has been improved: now there are two main class categories: “ User ” Class and “ System ” Class. The “ User ” Class...
View ArticleHBase crash after resuming suspended VM
I use BigDataLite for a lot of my sandboxing work. This is a OVA provided by Oracle which can be run on VirtualBox, VMWare, etc and has the Cloudera Hadoop platform (CDH) along with all of Oracle's...
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The 5-Minute Interview: Galit Gontar, Software Engineer at Glidewell...
ByBryce Merkl Sasaki, Aspiring Graphista | January 20, 2017 “We chose a graph database because it’s so much more expressive and a natural representation of the type of data we work with,”says Galit...
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Ingesting JSON data into Couchbase NoSQL Database using Streamsets
This week our Community Writing blog post comes from Nick Cadenhead Nick originally trained as a software engineer, he has spent the past 15 years using his technical expertise to provide specialist...
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