Andrew,
I think in the long run we are moving away from the BatchInserter, and
instead going to find better ways to avoid disk IO, e.g. ordered
writes per transaction, so that normal mode can be sped up to match
the BatchInserter, that hopefully will make it into 1.5, so I would
not worry about Bat
Niels,
that sounds fantastic, great work everyone so far!
Cheers,
/peter neubauer
GTalk: neubauer.peter
Skype peter.neubauer
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http://www.neo4j.org - Yo
I don't know if this is the right place to ask this; but does it support
a batch insert mode? When I am bulk loading data I don't have Node
objects to pass around, only node ids.
Thanks,
Andrew
On 07/07/2011 06:19 PM, Niels Hoogeveen wrote:
> I created a wiki page for indexed relationships in t
That's such a fast reply, I'm sorry I was going to delete my previous post. I
didn't read that well. I get it now. Thanks :)
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I did a write up on indexed relationships in the Git repo:
https://github.com/peterneubauer/graph-collections/wiki/Indexed-relationships
A performance comparison would indeed be great. Anecdotally, I have witnessed
the difference when trying to load all entries of Dbpedia. With 2.5 G heap
space
Thanks
Michael
Am 08.07.2011 um 01:19 schrieb Niels Hoogeveen:
>
> I created a wiki page for indexed relationships in the Git repo, see:
> https://github.com/peterneubauer/graph-collections/wiki/Indexed-relationships
>
>> From: michael.hun...@neotechnology.com
>> Date: Thu, 7 Jul 2011 22:53:0
RelationshipType is just an interface with the "name()" method.
RelationshipType knows = DynamicRelationshipType.withName("knows");
node.createRelationshipTo(node2,knows);
Michael
P.S. You can also imagine other programmatic ways of implementing that
interface.
Am 08.07.2011 um 01:13 schrieb
I created a wiki page for indexed relationships in the Git repo, see:
https://github.com/peterneubauer/graph-collections/wiki/Indexed-relationships
> From: michael.hun...@neotechnology.com
> Date: Thu, 7 Jul 2011 22:53:05 +0200
> To: user@lists.neo4j.org
> Subject: Re: [Neo4j] Indexed relationsh
But I can have an enum class and implements RelationshipType but doesn't that
mean that I have to define each Relationship before hand. For example, If I
have a text, "I know john", and "know" relationship doesn't exist in
MyRelationshipType (which implements RelationshipType already). How could I
Thanks a lot. :)
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Right those are some of the issues.
So one way would be to specify a tx timeout upfront which automatically rolls
back the tx (you can just add a kind of timer/TTL to the tx-session object) and
clears it as well.
Keeping state on the server is always a problem but I don't see a different
solut
Niels could you perhaps write up a blog post detailing the usage (also for your
own scenario and how that solution would compare to the naive supernodes with
just millions of relationships.
Also I'd like to see a performance comparision of both approaches.
Thanks so much for your work
Michael
Could you put these code examples into the Readme for the project or on a wiki
page?
Am 07.07.2011 um 22:11 schrieb Niels Hoogeveen:
>
> IndexedRelationship and IndexedRelationshipExpander are now in Git. See:
> https://github.com/peterneubauer/graph-collections/tree/master/src/main/java/org/n
I am glad to see a solution will be provided at the core level.
Today, I pushed IndexedRelationships and IndexedRelationshipExpander to Git,
see:
https://github.com/peterneubauer/graph-collections/tree/master/src/main/java/org/neo4j/collections/indexedrelationship
This provides a solution to th
Also take a look at DynamicRelationshipTypes if you want to instantiate
relationship types at runtime.
On Thu, Jul 7, 2011 at 9:16 PM, Rick Bullotta
wrote:
> Take a look at the RelationshipType interface. If you implement that
> (which is really simple - just a name() property), you can have you
Take a look at the RelationshipType interface. If you implement that (which is
really simple - just a name() property), you can have your own class that can
have relationships with any names you want. They do need to be unique, however.
From: user-boun.
IndexedRelationship and IndexedRelationshipExpander are now in Git. See:
https://github.com/peterneubauer/graph-collections/tree/master/src/main/java/org/neo4j/collections/indexedrelationship
An example:
class IdComparator implements java.util.Comparator{
public int compare(Node n1, Node n2){
Is there anyway I can add relationships on-the-fly or programmatically?
Because sometime I might not know the relationships and I want to add that
to the database.
Cheers,
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2011/7/7 Agelos Pikoulas
> I think its the same problem pattern that been in discussion lately with
> dense nodes or supernodes (check
> http://lists.neo4j.org/pipermail/user/2011-July/009832.html).
>
> Michael Hunger has provided a quick solution to visiting the *few*
> RelationshipTypes on a no
I've done some traversal additions, and this also in a branch... pushing
soon!
2011/7/7 Adriano Henrique de Almeida
> I've sent a Pull Request long time ago fixing this, but it was to the old
> neo4j repository. Guess it wasn't merged.
>
> https://github.com/neo4j/graphdb/pull/2
>
> Can send it
It is possible to grab an id from the id-generator, but then every call to
GraphDatabaseService#getRelationshipById() will throw a NotFoundException.
> From: michael.hun...@neotechnology.com
> Date: Thu, 7 Jul 2011 19:09:41 +0200
> To: user@lists.neo4j.org
> Subject: Re: [Neo4j] Indexed relation
Why can't they should.n't it be possible to grab an id from the id-generator on
creation and store it as property?
Sent from my iBrick4
Am 07.07.2011 um 16:55 schrieb Niels Hoogeveen :
>
> Hi Michael,I realize that the implementation of IndexedRelationship can in
> fact support returning rel
I'll strongly +1 that having a concept of "unique" index values should be
built into Neo4j. It's just too common of a requirement.
Aseem
On Thu, Jul 7, 2011 at 11:48 AM, etc3 wrote:
> I'm new to this framework, is there an example that demonstrates removing a
> non-existent property and how it
I'm new to this framework, is there an example that demonstrates removing a
non-existent property and how it would be used in this context?
Thanks
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On
Behalf Of Chris Gioran
Sent: Thursday, July 07,
Yes,
please do, and send the CLA mail first, see
http://wiki.neo4j.org/content/About_Contributor_License_Agreement
Cheers,
/peter neubauer
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Skype peter.neubauer
Phone +46 704 106975
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I've sent a Pull Request long time ago fixing this, but it was to the old
neo4j repository. Guess it wasn't merged.
https://github.com/neo4j/graphdb/pull/2
Can send it again, if the guys want.
2011/7/7 Niels Hoogeveen
>
> The interface of org.neo4j.graphdb.Expander contains a typo.
> The metho
The interface of org.neo4j.graphdb.Expander contains a typo.
The method addRelationsipFilter(Predicate) should be
called addRelationshipFilter(Predicate).
Niels
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You can use Transactions.
Marko.
> How do I ensure another request is not performing the same operation on
> another node in the cluster?
>
>
> -Original Message-
> From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On
> Behalf Of Marko Rodriguez
> Sent: Thursday,
Marko's solution works, because you roll back the transaction once you find a
duplicate entry.
Another solution to this problem is to use the SortedTree index in
graph-collections https://github.com/peterneubauer/graph-collections, which has
a setting that makes an index unique. This component
Hi,
the ability to acquire locks cluster-wide exists, albeit in an ad hoc
fashion. Grabbing a write lock on the node you want to ensure is
uniquely indexed will ensure that the operations are serialized across
all cluster members.
The most simple way to get that lock currently is the (somewhat
hac
Hi Michael,I realize that the implementation of IndexedRelationship can in fact
support returning relationships, and I have a preliminary version running
locally now.The returned relationships can support all methods of the
Relationship interface, returning the node pointing to the treeRoot as
How do I ensure another request is not performing the same operation on
another node in the cluster?
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On
Behalf Of Marko Rodriguez
Sent: Thursday, July 07, 2011 10:35 AM
To: Neo4j user discussions
S
Hi,
> We are testing Neo4J and need to support unique emails across all users. Is
> this possible with the current API?
You can add such a constraint when updating the indices:
if(index.get('email', address).hasNext()) {
throw new RuntimeException("There are two nodes that share the same emai
We are testing Neo4J and need to support unique emails across all users. Is
this possible with the current API?
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I think its the same problem pattern that been in discussion lately with
dense nodes or supernodes (check
http://lists.neo4j.org/pipermail/user/2011-July/009832.html).
Michael Hunger has provided a quick solution to visiting the *few*
RelationshipTypes on a node that has *millions* of others, util
good idea. i'll ponder it for a bit.
but yes, we clearly need to keep state around, so for REST it'd be carried
around in session. but on server side I guess you have issues with never
ending transactions, how to cull them, etc. since it's a stateless
req/response comm channel. on a permanent chan
Hi Michael,
I haven't yet worked on an example.
There are tests for the SortedTree implementation,
but didn't add those to the IndexedRelationship class,
which is simply a wrapper around SortedTree.
Having a test would have caught the error
that no relationship to the treeNode was created
I use the shell as-is, but the messages.log is reporting...
Physical mem: 3962MB, Heap size: 881MB
My point is that if you ignore caching altogether, why did one run take
17x longer with only 2.4x more data? Considering this is a rather
iterative algorithm, I don't see why you would even r
But then it would be possible to write a RequestFilter for the Neo4j-Server
that does start and commit/rollbacks transactions.
I.e. you create a tx object and put it in the session-context if there is none
and return a tx-token that the filter uses (e.g. as header-field).
then later you can pull
Following up on the topic of transactions for client API.
What is the current plan for some sort of client side API supporting
transactions?
I'm playing around with some ideas here and the lack of transaction support
in the client API is problematic. I know there's BATCH support in the REST
API w
Good work,
do you have an example ready (and/or some tests that show how it works/is used)
?
In creation, manual traversal and automatic traversal (i.e. is there a
RelationshipExpander that uses it).
And in the constructor if there is no relationship to the treeNode, you create
a new one, but
Finished the implementation of indexed relationships. The graph collections
component now contains the package
https://github.com/peterneubauer/graph-collections/tree/master/src/main/java/org/neo4j/collections/indexedrelationship,
containing the IndexedRelationship class.
This class can be used
Robin,
the database is deleted after each run in Neo4jTestCase.java,
@Override
@After
protected void tearDown() throws Exception {
shutdownDatabase(true);
super.tearDown();
}
if you change to shutdownDatabase(false), the database will not be
deleted. In this case,
Thanks!
I'll give it a try soon.
On Thu, Jul 7, 2011 at 1:50 AM, Josh Adell wrote:
> Hey all,
>
> I've been working on another PHP client for Neo4j. I think it's ready
> for some real-life testing, and I'm interested to see what you all
> think.
> GitHub: https://github.com/jadell/Neo4jPHP
> Do
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