neo4j

Neo4j query for shortest path stuck (Do not work) if I have 2way relationship in graph nodes and nodes are interrelated

由 旧城冷巷雨未停 提交于 2019-12-18 07:05:10
问题 I made relation graph two relationship, like if A knows B then B knows A, Every node has unique Id and Name along with other properties.. So my graph looks like if I trigger a simple query MATCH (p1:SearchableNode {name: "Ishaan"}), (p2:SearchableNode {name: "Garima"}),path = (p1)-[:NAVIGATE_TO*]-(p2) RETURN path it did not give any response and consumes 100% CPU and RAM of the machine. UPDATED As I read though posts and from comments on this post I simplified the model and relationship. Now

Creating a metabolic pathway in Neo4j

由 為{幸葍}努か 提交于 2019-12-18 05:01:15
问题 I am attempting to create the glycolytic pathway shown in the image at the bottom of this question, in Neo4j, using these data: glycolysis_bioentities.csv name α-D-glucose glucose 6-phosphate fructose 6-phosphate "fructose 1,6-bisphosphate" dihydroxyacetone phosphate D-glyceraldehyde 3-phosphate "1,3-bisphosphoglycerate" 3-phosphoglycerate 2-phosphoglycerate phosphoenolpyruvate pyruvate hexokinase glucose-6-phosphatase phosphoglucose isomerase phosphofructokinase "fructose-bisphosphate

Move/copy all relationships to different node

由 我的未来我决定 提交于 2019-12-18 03:42:11
问题 Is there any way to copy or move a relationship from one node to another? I have a situation similar to that here: neo4j merge 2 or multiple duplicate nodes and here: Copy relationships of different type using Cypher Say I have this pattern in the graph (a)-[r:FOO]->(b) (a)<-[r2:BAR]-(c) I then have another node, (d) , which may or may not be a duplicate of (a) . My thinking is that it does not matter whether the nodes are duplicate or not from a functionality point of view. I want to be able

Neo4j介绍与使用

由 主宰稳场 提交于 2019-12-18 02:07:48
Neo4j简介 Neo4j 是一个高性能的,NOSQL图形数据库，它将结构化数据存储在网络上而不是表中。Neo4j也可以被看作是一个高性能的图引擎，该引擎具有成熟数据库的所有特性。程序员工作在一个面向对象的、灵活的网络结构下而不是严格、静态的表中——但是他们可以享受到具备完全的事务特性、企业级的数据库的所有好处。 Neo4j因其嵌入式、高性能、轻量级等优势，越来越受到关注。 图形数据结构 在一个图中包含两种基本的数据类型：Nodes（节点） 和 Relationships（关系）。Nodes 和 Relationships 包含key/value形式的属性。Nodes通过Relationships所定义的关系相连起来，形成关系型网络结构。 Neo4j安装 Neo4j可以被安装成一个独立运行的服务端程序，客户端程序通过REST API进行访问。也可以嵌入式安装，即安装为编程语言的第三方类库，目前只支持java和python语言。 因Neo4j是用java语言开发的，所以确保将要安装的机器上已安装了jre或者jdk 安装为服务 此种安装方式简单，各平台安装过程基本一样 从 http://neo4j.org/download 上下载最新的版本，根据安装的平台选择适当的版本。 解压安装包，解压后运行终端，进入解压后文件夹中的bin文件夹。 在终端中运行命令完成安装 Linux

neo4j: What is the syntax to set cypher query parameters in the browser interface?

由 天大地大妈咪最大 提交于 2019-12-18 02:03:52
问题 I am trying to run queries from the neo4j browser to reproduce results from my neo4j-javascript-driver client. What is the syntax for defining query parameters in the neo4j b I recently attended a neo4j training session in NYC where the trainer (David Fauth) did this, unfortunately, I did not take notes on it, since I figured that I could read-up on this online...but no success. 回答1: In neo4j-browser you need type for example: :params {nodes: [{name: "John", age: 18}, {name: "Phill", age: 23}

Neo4j WARNING: Max 1024 open files allowed, minimum of 40 000 recommended. See the Neo4j manual

由 Deadly 提交于 2019-12-17 22:38:33
问题 I installed Neo4j on Ubuntu 12.04 using these instructions: http://www.neo4j.org/download/linux wget -O - http://debian.neo4j.org/neotechnology.gpg.key | apt-key add - echo 'deb http://debian.neo4j.org/repo stable/' > /etc/apt/sources.list.d/neo4j.list apt-get update apt-get install neo4j I made sure to have the right jdk: root@precise64:~# java -version java version "1.7.0_45" Java(TM) SE Runtime Environment (build 1.7.0_45-b18) Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

What is the difference between graph-based databases and object-oriented databases?

由 余生颓废 提交于 2019-12-17 22:04:56
问题 What is the difference between graph-based databases (http://neo4j.org/) and object-oriented databases (http://www.db4o.com/)? 回答1: I'd answer this differently: object and graph databases operate on two different levels of abstraction. An object database's main data elements are objects, the way we know them from an object-oriented programming language. A graph database's main data elements are nodes and edges. An object database does not have the notion of a (bidirectional) edge between two

neo4j LOAD CSV returns Couldn't Load external resource - neo4j lost in directory

由 血红的双手。 提交于 2019-12-17 20:24:47
问题 Since I use Neo4j 3.0.1, this cypher query: USING PERIODIC COMMIT 500 LOAD CSV WITH HEADERS FROM >"file:///home/user/Documents/links.csv" AS csvLine ... returns Couldn't load the external resource at: file:/home/user/Documents/neo4j-community-3.0.1/import/home/user/Documents/links.csv Neo4j is located on my machine (Ubuntu 14.04), in the "Documents" folder, as the "links.csv" file. (with a 2.xx version of neo4j this exact query was working perfectly) I don't undersand why neo4j3.0 try to

Performance of arbitrary queries with Neo4j

由 我怕爱的太早我们不能终老 提交于 2019-12-17 18:32:17
问题 I was reading a paper published by Neo4J (a while ago): http://dist.neo4j.org/neo-technology-introduction.pdf and on the 2nd to last page the Drawbacks section states that Neo4J is not good for arbitrary queries. Say I had Nodes of users with the following properties: NAME, AGE, GENDER And the following relationships: LIKE (points to Sports, Technology, etc. NODE) and FRIEND (Points to another USER). Is Neo4J not very efficient in querying something similar to: Find FRIENDS (of given node)

what is zookeeper port and its usage?

由 萝らか妹 提交于 2019-12-17 18:27:56
问题 I am quite new for zookeeper port through which I am coming across from past few days. I introduced with zookeeper port keyword at two occasion: while configuring neo4j db cluster (link) and while running compiled voltdb catalog (link) (See Network Configuration Arguments) Then, I came across Apache Zookeeper, (which I guess is related to distributed application, I am a newbie in distributed application as well). hence question came in my mind: is there any implementation of apache zookeeper
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