graylog中的mongodb配置
接手的一个工具平台,发现 graylog 集群使用了单个的 mongodb 作为数据库,于是需要配置一下集群,来防止数据丢失,毕竟很多配置都在里面. 为了以防万一,先备份一下 graylog 的配置. mongodump -h dbhost -d dbname -o dbdirectory 防止分布式部署的使用搞坏了.之后的恢复可以使用 mongorestore -h dbhost -d...
View ArticleHadoop学习笔记(一)――HDFS
块(Block) NameNode DataNode HDFS的文件被分成块进行存储 HDFS块的默认大小为64MB 块是文件存储处理的逻辑单元，在此上进行存储、查找等操作 NameNode和DataNode是HDFS中的两类节点 NameNode是管理节点，存放文件元数据 文件与数据块的映射表 数据块与数据节点的映射表 DataNode是HDFS的工作节点，存放数据块 体系结构 数据管理与容错...
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What you need to know about Hadoop
Unless you’ve been hiding away from the world of computing for the last few years, you’ll have come across Hadoop. Apache Hadoop , to give it its full name, is an open source framework designed to...
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OpenTSDB+Grafana 监控环境搭建
exportJAVA_HOME=/usr/lib/jvm/java-1.7.0 （2）配置core-site.xml <property> <name>fs.defaultFS</name> <value>hdfs://sms-test-001:9000</value> </property> <property>...
View ArticleRedis客户端常见异常分析
本文部分内容来自 《Redis3开发运维最佳实践》 一书，转载请声明。原文如下： https://cachecloud.github.io/2016/11/17/Redis%E5%AE%A2%E6%88%B7%E7%AB%AF%E5%B8%B8%E8%A7%81%E5%BC%82%E5%B8%B8%E5%88%86%E6%9E%90/...
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Knolx : MongoDB Replication And Sharding
Hello all, Knoldus organised a knolx session on the topic “MongoDB Replication And Sharding” on Friday, 4th november and 11th November 2016. MongoDB is a free and open-source cross-platform...
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什么场景应该用 MongoDB ？
月初在云栖社区上发起了一个 MongoDB 使用场景及运维管理问题交流探讨 的技术话题，有近5000人关注了该话题讨论，这里就 MongoDB 的使用场景做个简单的总结，谈谈什么场景该用 MongoDB? 很多人比较关心 MongoDB 的适用场景，也有用户在话题里分享了自己的业务场景，比如 案例1 > 1....
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Asia Pacific Companies Talk about Business Transformation At A Sold Out...
We were really excited to welcome a sold out crowd at the first Hadoop Summit in Tokyo last week. This was a fantastic response, based on the huge interest around a technology that is transforming...
View ArticleCTOvision Partners with 13-16 March 2017 Strata + Hadoop World San Jose: Save...
Once again, thanks to O'Reilly Media, we are able to offer a discount for all CTOvision readers who can attend the San Jose Strata Hadoop World. This is the biggest Big Data event of the year. Strata +...
View ArticleHadoop for joy? ODPi 2.0's available, but questions persist
The Hadoop standardisations body, ODPi, has today made its 2.0 release generally available. Formerly the Open Data Platform initiative, now known only as ODPi, the second iteration of the Hadoop...
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HBase Architecture: HBase Data Model & HBase Read/Write Mechanism
HBase Architecture In my previous blog on HBase Tutorial , I explained what is HBase and its features. I also mentioned Facebook messenger’s case study to help you to connect better. Now further moving...
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Docker for AWS Getting Started Video
Want tocreate a highly-availableDockercluster on Amazon Web Services ? Run multi-container applications on it using Docker Services ? Docker for AWS allows you to exactly do that!This video shows:...
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Neo4j is your RDF store (part 1)
If you want to understand the differences and similarities between RDF and the Labeled Property Graph implemented by Neo4j, I’d recommend you watch this talk I gave at Graph Connect San Francisco in...
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Mongodb的Web页面无法访问的问题
在项目开发过程中,会有一些日志的记录,如果将其存储在RDBMS中有时并不是1个很理智的做法,因此我们会选择一些NoSQL来辅助进行处理。 而在NoSQL中,公司的团队使用mongodb来进行日志的存储,对于这种文档型的数据库,拿来存储日志还是可以的,如果用来做订购车业务的话还是需要斟酌一下。...
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Hortonworks prescribes cloudy Hadoop for AWS
Hortonworks is launching a new cloud service on Amazon Web Services for customers who don't fancy working on Azure. Hortonworks Data Cloud is now available on AWS, offering users the ability to quickly...
View ArticleAnnouncing Hortonworks Data Cloud for AWS
Earlierthis year, we started making Technical Previews of Hortonworks Data Cloud for AWS available. The feedback and response has been incredible, and over the past few months, we performed many...
View ArticleCouchDB Weekly News, November 17, 2016
Releases in the CouchDB Universe couchdb_connector 0.4.0 (Elixir) A connector for CouchDB with support for views and authentication. couchdb-promises 1.4.0 ES6 promises-based CouchDB client...
View ArticleCentOS 6.4创建Mongodb副本集
MongoDB是一个开源的non-SQL数据库引擎。 MongoDB是可扩展的，是标准关系数据库管理系统（RDBMS）的替代品。 副本集可以使在节点发生故障时还能提供对您的数据的访问。安装MongoDB1.确保在副本集的每个成员设置好hostnamenano /etc/hostname/etc/hostname:europa2.创建一个文件以保存MongoDB存储库的配置信息：sudo touch...
View Article利用yum安装Redis的方法详解
介绍Redis是一个key-value存储系统。和Memcached类似，它支持存储的value类型相对更多，包括string(字符串)、list(链表)、set(集合)、zset(sorted set...
View Article在CentOS 7环境下安装Redis数据库详解
正如我们所知的那样，Redis是一个开源的、基于BSD许可证的，基于内存的、键值存储NoSQL数据库。Redis经常被视为一个数据结构服务器，因为Redis支持字符串strings、哈希hashes、列表lists、集合sets、有序集sorted...
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