blocks|key|2850604|text|由于您使用的是Neo3.x，要在不删除现有数据库的情况下创建新数据库，您只需编辑$NEO4J_HOME的conf目录中的neo4j.conf文件即可。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2850605|搜索dbms.active_database=，其默认值应为graph.db。将其替换为其他名称，然后再次启动neo4j。现在，将在该目录名下创建一个新数据库。要切换回以前的数据库，请重复上述步骤，只需在配置文件中将新值替换为graph.db即可。|2850606|entityMap^0|14|B|1G|4|1O|A|0|2|L|U|8|35|8|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|I|$]]

Since you're using Neo 3.x, to create a new database without removing your existing one, you can simply edit the <code>neo4j.conf</code> file in your <code>conf</code> directory of your <code>$NEO4J_HOME</code>.

Search for <code>dbms.active_database=</code>, which should have the default value of <code>graph.db</code>. Replace it with some other name and start neo4j again. Now, a new database will be created under that directory name. To switch back to your previous db, repeat the steps, just replace your new value with <code>graph.db</code> in the configuration file.

blocks|key|102031|text|Neo4J技术带来了一个新的桌面工具，它极大地提高了工作效率，称为Neo桌面。你可以从here下载|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|102032|使用它，您可以管理不同的项目，创建不同的数据库，并使用GUI简单地管理它们/在它们之间切换。真的节省了很多时间。|102033|​|102034|📷|atomic|102035|102036|entityMap|0|LINK|mutability|MUTABLE|url|https://neo4j.com/download/neo4j-desktop/|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/70529b41d455cda0b7bb3d4b0e9eda6b.png|imageAlt^0|17|4|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|6|7|13|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|14|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|15|8|@]|9|@$A|16|B|17|1|18]]|C|$]]|$1|K|3|G|5|6|7|19|8|@]|9|@]|C|$]]|$1|L|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|M|$N|$5|O|P|Q|C|$R|S]]|T|$5|U|P|V|C|$W|X|Y|-4]]]]

Neo Technology has come with a new Desktop Tool that greatly improves productivity called Neo4J Desktop. You can download it <a href="https://neo4j.com/download/neo4j-desktop/" rel="noreferrer">here</a>

Using it you can manage different projects, create different databases, and simply manage them / switch between them, using the GUI. 
Really saves a lot of time. 

<a href="https://i.stack.imgur.com/MBWn6.png" rel="noreferrer"><img src="https://i.stack.imgur.com/MBWn6.png" alt="enter image description here"></a>

blocks|key|104384|text|显然，在Community+Edition中您只有一个数据库，所以我使用docker容器为每个数据库创建一个服务器。修改端口%2B数据卷，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|104385|docker+run+\
--rm+\
--publish=8474:7474+--publish=8687:7687+\
--volume=$HOME/neo4j/data2:/data+\
--volume=$HOME/Downloads/neo4j/import:/var/lib/neo4j/import+\
--name=neo4j+\
--env+NEO4J_AUTH=neo4j/password+\
neo4j:3.4


#+Defaults:
#+--publish=7474:7474+--publish=7687:7687+\
#+--volume=$HOME/neo4j/data:/data+\|code-block|syntax|javascript|104386|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Apparently in Community Edition you only have 1 database, so I used docker containers to create one server per db. Modify the ports + data volume as shown below:

<pre><code>docker run \
--rm \
--publish=8474:7474 --publish=8687:7687 \
--volume=$HOME/neo4j/data2:/data \
--volume=$HOME/Downloads/neo4j/import:/var/lib/neo4j/import \
--name=neo4j \
--env NEO4J_AUTH=neo4j/password \
neo4j:3.4


# Defaults:
# --publish=7474:7474 --publish=7687:7687 \
# --volume=$HOME/neo4j/data:/data \
</code></pre>

blocks|key|2850559|text|在Neo4j文档中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2850560|2850561|社区版是Neo4j的一个全功能版本，适用于单实例部署。它完全支持关键的Neo4j特性，如ACID遵从性、Cypher和编程API。它非常适合学习Neo4j、do项目和小型工作组中的应用程序。|blockquote|2850562|2850563|2850564|因此，您只有一个数据库实例。|2850565|如果您想开始使用Neo4j，在社区版中有一个名为“跳转到代码”的部分。有一个向导可以告诉你如何开始使用他们的语言“Cypher”。|2850566|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|O|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|P|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|S|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|T|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|M|$]]

In the documentation of Neo4j

<blockquote>
 Community Edition is a fully functional edition of Neo4j, suitable for
 single instance deployments. It has full support for key Neo4j
 features, such as ACID compliance, Cypher, and programming APIs. It is
 ideal for learning Neo4j, for do-it-yourself projects, and for
 applications in small workgroups.
</blockquote>

So you only have one database instance.

If you want to get started with Neo4j there is a section in the community edition called "jump into code." There is a wizard to tell you how to get started with their language "Cypher."

blocks|key|2638958|text|要在Unix环境中创建新的neo4j数据库，需要执行以下步骤:首先，Neo4j的配置文件存在于以下位置：cd+/etc/neo4j+(ls+--->+++++neo4j.config)；使用vim访问该文件：sudo+vim+neo4j.config;编辑以下内容(按I(表示插入))：有一个注释赋值(在开头)：#dbms.active_database=graph.db;删除注释并添加包含要创建的数据库的文件夹的名称，并在graph.db之前直接添加其位置即：dbms.active_database=new_db/graph.db;按:+Esc+%2B+:wq+(保存修改)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2638959|执行sudo+service+neo4j+start后，您将看到激活的数据库为new_db+/raph.db。如果要检查是否一切正常，请执行以下步骤:转至：cd+/var/lib/neo4j；execute：ls+(you+will+have+certificates,+plugins,+data,+import)；然后转至：cd+data/databases；execute+ls：您将注意到旧数据库(+graph.db+)和包含new_created数据库graph.db的新文件夹new_db|2638960|备注：|2638961|2638962|Neo4j是为单一数据库使用而开发的，并且所有的操作都是在单一数据库上执行的。|ordered-list-item|2638963|如果你想清除数据库，你可以去graph.db的位置并擦除所有东西，因为从neo4j中这样做是非常困难的，而且大多数时候，你会忘记删除依赖项，标签，...也就是说，我们想要清除文件夹new_db中新创建的数据库备注:我们转到：cd+..../new_db；execute+ls+(you+will+have+graph.db)；execute：|2638964|备注，如果您想访问默认数据库，只需重新注释您编辑的分配|2638965|entityMap^0|1G|14|2W|M|4C|V|6G|11|0|2|O|26|H|2W|1I|4K|H|5A|2|0|0|0|0|34|E|3R|R|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|12|8|@$9|13|A|14|B|C]|$9|15|A|16|B|C]|$9|17|A|18|B|C]|$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1D|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]|$1|K|3|L|5|M|7|1F|8|@]|D|@]|E|$]]|$1|N|3|O|5|M|7|1G|8|@$9|1H|A|1I|B|C]|$9|1J|A|1K|B|C]]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1L|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]]|S|$]]

To create a new Neo4j database in Unix Environment, the following steps are needed:
first, the configuration file of neo4j exists in the following location:
<code>cd /etc/neo4j (ls ---&gt; neo4j.config)</code>;
access the file using vim: <code>sudo vim neo4j.config;</code>
edit the following (by pressing i (for insert)):
there is a commented assignment (at the beginning) which is:
<code>#dbms.active_database=graph.db;</code> remove the comment and add the name of the folder containing the database that you want to create and directly add its location before graph.db
i.e: <code>dbms.active_database=new_db/graph.db;</code> press: Esc + :wq (to save the modification)
After executing <code>sudo service neo4j start</code>, you will see that the activated database is new_db/graph.db
if you want to check that everything went fine, follow these steps:
go to: <code>cd /var/lib/neo4j</code>;
execute: <code>ls (you will have certificates, plugins, data, import)</code>; then go to: <code>cd data/databases</code>; then execute <code>ls</code> :you will notice that you have the old database (graph.db), and the new folder new_db that contains also the new_created database graph.db
Remarks:
<ol>
<li>Neo4j is developed for single database use, and all the manipulations are performed on a single database.</li>
<li>If you want to clear the database, you can go to the location of graph.db and erase everything since doing that from neo4j is very difficult and most of times, you will forget to delete dependencies, labels, ...
i.e : say, we want to clear the new created database graph.db that exists in the folder new_db:
we go to : <code>cd ..../new_db</code>;
execute <code>ls (you will have graph.db)</code>;
execute: <code>sudo rm -rf graph.db/*</code>;</li>
<li>Last remark, if you want to access the default database, you just recomment the assignment that you edited</li>
</ol>

blocks|key|2639182|text|在因果聚类的情况下，这个过程有点棘手。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2639183|首先，停止群集中虚拟机上的所有neo4j实例|2639184|sudo+systemctl+stop+neo4j|code-block|syntax|javascript|2639185|Linux机器上的DB位置=+/var/lib/neo4j/data/databases以删除现有的db：rm+-rf+/database/graph.db|offset|length|style|CODE|2639186|在模板搜索dbms.active_database=下编辑新的DB名称，默认值应该为graph.db。用一个新的DB替换它。在重新启动时，neo4j将自动创建它。记住取消对该行的注释。|2639187|解除所有节点的绑定-这将清除群集状态，并强制节点重新加入群集。neo4j-admin+unbind现在，这真的很重要，大多数人都没有意识到这一点。|2639188|接下来，逐个启动所有节点中的neo4j实例。这应该会创建新的DB，您将看到节点加入了集群。sudo+systemctl+start+neo4j|2639189|检查日志使用|2639190|journalctl+-unit=neo4j+-r
OR
sudo+systemctl+status+neo4j|2639191|entityMap^0|0|0|0|F|T|1H|P|0|5|L|16|8|0|V|I|0|19|Q|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|13|8|@$K|14|L|15|M|N]|$K|16|L|17|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|18|8|@$K|19|L|1A|M|N]|$K|1B|L|1C|M|N]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1D|8|@$K|1E|L|1F|M|N]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1G|8|@$K|1H|L|1I|M|N]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1J|8|@]|9|@]|A|$]]|$1|W|3|X|5|F|7|1K|8|@]|9|@]|A|$G|H]]|$1|Y|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|Z|$]]

The process is a little tricky in case of causal cluster.

First, stop all the neo4j instances across the VMs in your cluster

<pre><code>sudo systemctl stop neo4j
</code></pre>

DB location on Linux machines = <code>/var/lib/neo4j/data/databases</code>
To delete existing db : <code>rm -rf /database/graph.db</code>

Edit new DB name under the template
Search for <code>dbms.active_database=</code>, which should have the default value of <code>graph.db</code> . Replace it with a new DB. On the restart, neo4j will automatically create it.
Remember to UNCOMMENT the line.

Unbind all the nodes — this clears the cluster state and forces the node to freshly join the cluster.
<code>neo4j-admin unbind</code>
Now, this is really important and most people are unaware of this.

Now go ahead and start neo4j instances in all the nodes one by one. This should create new DBs across and you’ll see the nodes joining the cluster.
<code>sudo systemctl start neo4j</code>

Check logs using

<pre><code>journalctl -unit=neo4j -r
OR
sudo systemctl status neo4j
</code></pre>

I'm using Linux 16.04 OS. I have installed fresh neo4j. I get referenced <a href="http://www.exegetic.biz/blog/2016/09/installing-neo4j-ubuntu-16-04/" rel="noreferrer">exegetic</a> and <a href="https://www.digitalocean.com/community/tutorials/how-to-install-neo4j-on-an-ubuntu-vps" rel="noreferrer">digitalocean</a> sites.

By default there's graph.db database.

<blockquote>
 My question is how to create a new database and create nodes and
 relation ship between nodes?
</blockquote>

As I show in picture default DB name is graph.db.

<a href="https://i.stack.imgur.com/C0MmA.png" rel="noreferrer"><img src="https://i.stack.imgur.com/C0MmA.png" alt="enter image description here"></a>

How to create new database in neo4j?

数据库

服务器

虚拟机

容器

Docker

Linux

Unix

我使用的是Linux16.04操作系统。我已经安装了全新的neo4j。我得到了被引用的和站点。默认情况下有graph.db数据库。我的问题是如何创建一个新的数据库，并创建节点和节点之间的关系？如我在图片中所示，默认的数据库名称是graph.db。​​

问如何在neo4j中创建新的数据库？
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