Neo4j导入工具成功，但未显示结果 [英] Neo4j import-tool succeeds but results are not showing up

问题描述

我最近开始使用导入工具来加快加载时间，到目前为止，结果是有希望的，只是以后它们不会通过cypher反映在我的数据库中.

I recently started using the import tool for faster load times, and so far the results were promising, except that they are not reflected in my database afterwards through cypher.

我的过程:

$ /path/to/neo4j-community-3.0.3/bin/neo4j stop
$ rm -rf /path/to/neo4j-community-3.0.3/data/
$ mkdir /path/to/neo4j-community-3.0.3/data
$ /path/to/neo4j-community-3.0.3/bin/neo4j-import --nodes:record /path/to/records.csv --into /path/to/neo4j-community-3.0.3/data

tmp.csv:

meta:ID,time:long,lat:float,lon:float
KAQP_20140420v20001_0000,1397970000,26.9387950897,-91.2847290039
KAQP_20140420v20001_0001,1397970060,26.9387989044,-91.2847595215
.... (1440 lines of the same record format) ...

对neo4j-import工具的调用结果:

Results of the call to neo4j-import tool:

Neo4j version: 3.0.3
Importing the contents of these files into neo4j-community-3.0.3/data:
Nodes:
  :record
  /neo4j/tmp.csv

Available memory:
  Free machine memory: 23.65 GB
  Max heap memory : 6.87 GB

Nodes

Done in 384ms
Prepare node index
[*:7.63 MB------------------------------------------------------------------------------------]    0
Done in 34ms
Calculate dense nodes

Done in 10ms
Node --> Relationship Sparse

Done in 10ms
Relationship --> Relationship Sparse

Done in 10ms
Node counts

Done in 51ms
Relationship counts

Done in 10ms

IMPORT DONE in 2s 360ms. Imported:
  1440 nodes
  0 relationships
  5760 properties

非常好，到目前为止，一切看起来都很不错.所以现在我启动neo4j:

Excellent, everything looks great so far. So now I start up neo4j:

$ /path/to/neo4j-community-3.0.3/bin/neo4j start

然后我尝试获取记录数:

Then I attempt to get the count of records:

$ /path/to/neo4j-community-3.0.3/bin/neo4j-shell -c 'MATCH (r:record) RETURN count(r) as count;'

+----------+
| count(r) |
+----------+
| 0        |
+----------+
1 row
42 ms

那很奇怪，所以我想也许这个标签没有注册或什么?因此，我尝试了以下方法:

That was strange, so I thought maybe the label wasn't registered or something? So instead I tried this:

$ /path/to/neo4j-community-3.0.3/bin/neo4j-shell -c 'MATCH (r) RETURN count(r) as count;'


+----------+
| count(r) |
+----------+
| 0        |
+----------+
1 row
28 ms

这真的很奇怪.我的下一个想法也许是目录很奇怪?所以我测试了/path/to/neo4j-community-3.0.3/data的大小:

This is really weird. My next thought was maybe the directory is being weird? So I tested the size of /path/to/neo4j-community-3.0.3/data:

之前:

$ du -sh /path/to/neo4j-community-3.0.3/data
4K

之后:

$ du -sh /path/to/neo4j-community-3.0.3/data
53M

它肯定在那里！我不知道是否错过了关键的一步.知道发生了什么事吗?

Its definitely in there! I have no clue if I just missed a crucial step. Anyw idea whats going on?

推荐答案

调用neo4j-import时需要指定目录$NEO4J_HOME/data/databases/graph.db:

/path/to/neo4j-community-3.0.3/bin/neo4j-import --nodes:record /path/to/records.csv --into /path/to/neo4j-community-3.0.3/data/databases/graph.db

或在其他位置创建导入，并将$NEO4J_HOME/data/databases/graph.db的内容替换为neo4j-import

or create the import somewhere else and replace the contents of $NEO4J_HOME/data/databases/graph.db with the datastore created by neo4j-import

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