Graph database company Neo4j wants to move beyond providing only its graph database, and is working on what it calls a 'graph platform' to help companies make the most of their data. In this post, am gonna explain two methods of resetting neo4j graph databases password. Method 1 involves, normal, traditional way of changing password and Method 2 is used, where the user forgot the password and there is no other way of changing the password, for this you might seek help from system admin.
Is it possible to create/delete different databases in the graph database Neo4j like in MySQL? Or, at least, how to delete all nodes and relationships of an existing graph to get a clean setup for tests, e.g., using shell commands similar to
rmrel
or rm
?rmvrmv
12 Answers
You can just remove the entire graph directory with
rm -rf
, because Neo4j is not storing anything outside that:Also, you can of course iterate through all nodes and delete their relationships and the nodes themselves, but that might be too costly just for testing ...
Peter NeubauerPeter Neubauer
even more simple command to delete all nodes and relationships:
John BachirJohn Bachir
Creating new Database in Neo4j
Before Starting neo4j community click the browse option
and choose a different directory
and click start button.
New database created on that direcory
BharathirajaBharathiraja
We can delete all nodes with relationships,
Currently there is no any option to create multiple databases in Noe4j. You need to make multiple stores of Neo4j data. See reference.
Community♦
Somnath MulukSomnath Muluk
ScottScott
For anyone else who needs a clean graph to run a test suite - https://github.com/jexp/neo4j-clean-remote-db-addon is a great extension to allow clearing the db through a REST call. Obviously, though, don't use it in production!
Matt LuongoMatt Luongo
Run your test code on a different neo4j instance.
- Copy your neo4j directory into a new location. Use this for testing. cd into the new directory.
- Change the port so that you can run your tests and use it normally simultaneously. To change the port open
conf/neo4j-server.properties
and setorg.neo4j.server.webserver.port
to an unused one. - Start the test server on setup. Do
./neo4j stop
andrm -rf data/graph.db
on teardown.
For more details see neo4j: How to Switch Database? and the docs.
Community♦
PramodPramod
In Neo4j 2.0.0 the ? is no longer supported. Use OPTIONAL MATCH instead:
charlescharles
Easiest answer is: NO
The best way to 'start over' is to
- move to another empty data folder
or
- close Neo4j completely
- empty the old data folder
- restart Neo4j and set the empty folder as the data folder
There is a way to delete all nodes and relationships (as described here)
user3194532user3194532
In 2.0.0 -M6 You can execute the following Cypher script to delete all nodes and relations:
Martin SeelerMartin Seeler
As of version 3 I believe it is now possible to create separate database instances and thus their location is slightly different.
Referring to:https://neo4j.com/developer/guide-import-csv/
The --into retail.db is obviously the target database, which must not contain an existing database.
On my Ubuntu box the location is in:
/var/lib/neo4j/data/databases
where I currently see only graph.db
which I believe must be the default.AntonyAntony
You can delete your data files and if you want to go through this way, I would recommend delete just your graph.db, for example. Otherwise your are going to mess your authentication info.
raeffrayraeffray