aerospike

User-Defined Functions (UDF) Development Guide Introduction 在Aerospike中,UDF是指可以运行在Aerospike数据库服务器上的一段代码,使用lua脚本语言进行编程(也可以是被lua脚本调用的C语言) Aerospike的UDF主要有两种,一种是针对单条记录的(Record UDF)和流式UDF(Stream UDF). 单条记录的UDF只能操作于一条记录,而流式UDF可以作用于记录流,它可以包含多个流操作符来执行非常复杂的查询 UDF的复杂性可以小到只有数行代码,大到包含了许多内部函数和外部函数的成千上万行代码 每一个UDF,应用的数据模型和记录之间的内部交互是值得深思的问题.通常UDF的开发流程是这样的: 设置应用的数据模型 设计UDF来对记录执行响应的函数 创建/测试UDF 注册UDF到Aerospike服务器 循环进行测试/开发流程 系统测试 系统部署 UDF的设计和开发通常是一个迭代的过程,通常开始都很简单,慢慢的开始逐渐复杂 了解UDF的机制的最好办法就从创建Hello World Record UDF开始,下面这个例子将会展示如何创建和执行一个Hello World UDF function hello_world(rec) return "Hello World!!" end Hello

I have converted JSON file to CSV format and now loading the CSV in Aerospike using aerospike loader. I can do this for simple structure but how to modify the contents of allDatatype.json to load the nested CSV file in Aerospike? https://github.com/aerospike/aerospike-loader/tree/master/example JSON FILE { "centers" : { "ER" : { "admin":{ "users" : { "emp1" : { "password" : "abcdefgh", "username" : "pankaj-roy" }, "emp2" : { "password" : "12345678", "username" : "niketan-shah" } } } } } } CSV FILE centers.ER.admin.users.emp2.username,centers.ER.admin.users.emp2.password, centers.ER.admin.users

I'm trying to fetch all records along with Primary key from Aerospike. I tried using client.query functionality as below var query = client.query(aerospikeDBParams.dbName,"testRecords"); var stream = query.execute(); with this I'm getting all the fields except the Primary key.How can i get Primary key along with the other fields? Thanks in advance You first need to actually store the primary key with the record . The client and server locate the record using its digest, which the client hashes using the (namespace, set, primary-key) information. The default value for the key write policy is

I was wondering how one would represent relationships in Aerospike ? I realize it's a Key-Value store but is there an example that can be given? For example: If have a user in the system and I want to get a list of Thing records associated with that user. Couple of quick ideas: 1- Have each user be a record (equivalent of a row for conventional RDBMS) with multiple bins, each bin having the Primary Key of a 'Thing' Record in it. You can find more details about Aerospike's data model here . This should work well if the number of Things associated to a user is fairly low (under 100 typically). 2

参考文章： ArangoDB原生多模型数据库 (百科) ArangoDB官网 ArangoDB数据库入门 arangodb-vs-cassandra arangodb-vs-mongodb 2 ArangoDB、Neo4j、OrientDB单机性能比较 ArangoDB简单实例介绍 ArangoDB之SQL/AQL-比较 SQL/AQL-比较 (官网) ArangoDB 的使用 -- 安装和配置 ArangoDB 学习笔记（1）入门篇 ArangoDB---存储引擎（RocksDB） 简介： ArangoDB是一个开源NoSQL数据库，官网： https://www.ArangoDB.org/ . ArangoDB支持灵活的数据模型，比如文档Document、图Graph以及键值对Key-Value存储。ArangoDB同时也是一个高性能的数据库，它使用类SQL查询或JavaScript扩展来构建高性能应用。 ArangoDB的特性 1）多模型数据库 可以灵活的使用键值对、文档、图及其组合构建你的数据模型。 2）查询便利 ArangoDB有类SQL的AQL查询语言，还可以通过REST方式进行查询。 3）可通过 JavaScript 进行扩展 无语言范围的限制，可以从前端到后端都使用同一种语言。 4）高性能 ArangoDB速度极快 5）Foxx - 构建自己的API

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I try to drop and trim a list to build a pagination system local function createMap ( postId , paramDate ) local m = map { id = postId , date = paramDate }; return m ; end function get ( rec , binName , from , to ) if aerospike : exists ( rec ) then local l = rec [ binName ] if ( l == nil ) then return nil else local length = #l; if ( length <= 10 and to <= 10 ) then return l ; elseif ( to >= length ) then local drop = list . drop ( l , from ); return drop ; else list . trim ( l , to );-- Remove all elements at and beyond a