Any thoughts on this?
2010/5/4 Mattias Persson
> Yep, but in that case just adding a length attribute doesn't really give
> enough. You could just as well add that the string must match a certain
> regex. pattern or something similar.
>
> 2010/5/3 Niels Hoogeveen
&
big heap size it can be a problem and cause
out-of-memory problems like you encountered...
>
> Thanks,
> Miklos
>
> 2010.05.17. 9:35 keltezéssel, Mattias Persson írta:
> > Hi, sorry for a late response.
> >
> > Yep, this seems like an excellent fit for Neo4j. Regarding
estimate the
> actual memory requirement. I guess that using lucene index cache further
> increases the memory requirement.
>
Yeah it does... do you have much RAM in your machine? try to increase the
heap to 1 or 2 Gb and see what happens.
>
> Miklós
>
> 2010.05.17. 11:15 keltezéssel
onality.
>
I concur with that
> > Date: Mon, 17 May 2010 10:01:30 +0200
> > From: matt...@neotechnology.com
> > To: user@lists.neo4j.org
> > Subject: Re: [Neo] indexing mode on MetamodelProperties
> >
> > Any thoughts on this?
> >
> > 2010/5/
, we will keep working on the
> implementation,
> and hope to push this into the trunk of kernel as soon as possible.
>
> --
> Tobias Ivarsson
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And regarding post-order, I just added post-order depth/breadth first
selectors which can be used like:
TraversalFactory.createTraversalDescription().postorderDepthFirst();
or
TraversalFactory.createTraversalDescription().postorderBreadthFirst();
2010/5/18 Mattias Persson
> The easi
ttp://wiki.neo4j.org/content/Traversal_HowTo#Label_all_nodes_in_a_depth_first_traversal_by_postorder
>
> btw, I intend to start adding more traversal howtos to that page, I
> encourage everyone to do the same :)
>
> Cheers,
> Tobias
>
> On Tue, May 18, 2010 at 10:19 AM, Mattias Per
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framework
>> > > didn't have to be generic. But in this case we'd like to support this
>> type
>> > > of interaction with simple graph structures with only one type of node
>> and
>> > > only one type of relationship since they are the structures that
>> > > social
>> > > network researchers are the most interested in.
>> > >
>> > > Thanks,
>> > > Alex
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>> > >
>> >
>> >
>> >
>> > --
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>> > Hacker, Neo Technology
>> > www.neotechnology.com
>> > Cellphone: +46 706 534857
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>>
>> _
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/20 Mattias Persson :
> Thank you all for the supplied use cases you've shared. By the looks
> of it there indeed seems to be cases where indexing for relationships
> is a nice fit.
>
> As Tobias mentioned earlier there's some lab code which I've been
> trying out
, LLC
>> > 9708 1st Ave NW
>> > Seattle, WA 98117
>> > rai...@chatsubo.net
>> >
>> > ph: +1 (206) 801-5728
>> > fx: +1 (206) 801-5729
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>>
>>
>>
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>
>
>
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ind the right PC for you. Learn more.
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>> >> > https://lists.neo4j.org/mai
getAbstractRepresentation(VerboseQuadStrategy.java:62)
>> >> >> > at
>> >> >> > org.neo4j.rdf.store.RdfStoreImpl.addStatement(RdfStoreImpl.java:89)
>> >> >> > at
>> >> >> > org.neo4j.rdf.store.RdfStoreImp
anks
> -Maaz Tariq
>
>
>
>
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n index on top of e.g. the year nodes in order to be able to
> effectively select multiple years. Do you have some more info on the
> dataset sizes of your domain so I can flesh the GIST out a bit with
> your search?
>
> /peter
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to something
> else?
>
> Thanks,
> Marko.
>
> http://markorodriguez.com
> http://tinkerpop.com
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ed on that, and that I bumped into a problem regarding isolation
recently I decided to remove it entirely, although I've wanted to do
that for quite some time now. Ahhh, now I feel great.
2010/5/31, Mattias Persson :
> Just don't use it and you'll be fine
>
> 2010/5/3
2010/5/31, Marko Rodriguez :
> Hi,
>
> Okay. I just removed it from Blueprints and everything compiled and all the
> test cases passed. Thus, all is "perfect." :)
>
Yep, aint that swell :)
> Thanks,
> Marko.
>
> On May 31, 2010, at 9:20 AM, Mattias Persson
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viour you should do:
...
"prune evaluator": {
"language": "builtin",
"value": "none"
}
which converts into PruneEvaluator.NONE.
>
> Sorry, perhaps they are dumb questions, but I need some of light, please.
Not at all, I hope this h
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2010/6/2 Javier de la Rosa :
> Thank you for your clarification.
>
> On 2 June 2010 13:31, Mattias Persson wrote:
>
>> "return filter": {
>> "language": "javascript",
>> "body": "position.node().getProperty( '
nstructors,
since you now can reach the graph database via
http://components.neo4j.org/neo4j-kernel/apidocs/org/neo4j/graphdb/PropertyContainer.html#getGraphDatabase()
, making that extra reference unnecessary.
Does anyone have an opinion about all this?
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tore.relationshiptypestore.db.names
> 4.0Kneostore.relationshiptypestore.db.names.id
> 4.0Knioneo_logical.log.active
> 4.0Ktm_tx_log.1
> 80M total
>
>
> On Wed, Jun 2, 2010 at 12:17 AM, Mattias Persson
> wrote:
>
>> Exactly, the problem is most likely that you try t
> \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
> *
>
>
> On Wed, Jun 2, 2010 at 3:50 PM, Biren Gandhi wrote:
>
>> There is only 1 property - "n" (to store name of the node) - used as
>> follows:
&
/4, Biren Gandhi :
> In that case, what are the ways to estimate storage capacity numbers? Basic
> formula of nodes*9 + edges*33 doesn't seem like a practical one.
>
> On Wed, Jun 2, 2010 at 11:26 PM, Mattias Persson
> wrote:
>
>> String properties are stored in bl
block of 133 bytes can store 120 bytes
>> of data). This means if all your strings are in 120 bytes multiples in
>> size you will make very efficient use of the store file while if they
>> are empty you will not make very good use of the space (exactly like a
>> normal
' the issue by allowing the user to filter out
> >> data on
> >> import, so we don't store everything. This will not satisfy all
> users,
> >> however.
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> ..
> .
> If i have the timetable data as a property field for each node, can i use
> this data in the astar algorithm?
> Any help would be great
> Thanks
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support. This is just a compilation of the kernel.
>
> Taylor
>
>
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fast,
> but does not work for fulltext query. For now the IndexService is embedded
> in the Object-graph mapper i wrote [2]. Anyone is free to check it out, if
> it looks interesting it could be moved to a neo4j subproject.
>
> -atle
>
>
> [1] http://code.google.com/p/bab
2010/6/11 Tobias Ivarsson :
> On Fri, Jun 11, 2010 at 12:20 PM, Mattias Persson > wrote:
>
>> I tried performance of BabuDB recently. I'm not very used to key-value
>> stores, but I chose this layout of the keys/values:
>>
>> key: key|value|id
>> v
eo4j.org
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lookups (in an index with 5M key/value pairs): 30-40ms (0.03 ms/lookup)
that is quite impressive and may be worth implementing as an index
provider for such indices.
>
>
> On Fri, Jun 11, 2010 at 1:51 PM, Tobias Ivarsson
> wrote:
>> On Fri, Jun 11, 2010 at 12:54 PM, Mattias Pers
> If I comment out the shutDown invocation, the exception is not thrown, but
> the program never stops. Being a newbie, I don't fully understand what's
> going on here. Can anyone please help me?
>
> Regards
>
> Arijit
>
> --
> "And when the night is cloudy,
> There is still a light that
; done
>
> Am I misinterpreting the term "standalone" as used here? Should I be
> running this in a different environment?
>
> Thanks,
> Travis
>
>
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orgot to mention the platforms I've been using:
>
> 1) Apple PPC, 2GB RAM, OSX - Leopard, java version "1.5.0_24"
> 2) Intel x86, 2GB RAM, CentOS 5, java version 1.6.0_20
>
> Regards
> Arijit
>
> On 17 June 2010 16:39, Mattias Persson wrote:
>
>> It can b
. I just tried that and it works like a
charm.
2010/6/17, Mattias Persson :
> 2010/6/17 Arijit Mukherjee :
>> Thanx Mattias for the hints.
>>
>> Actually I was just trying to test whether the shutdown hook may help or
>> not
>> - it didn't. I'm getting
i.neo4j.org/content/Batch_Insert
>
> Please let me know your inputs.
>
> Thanks,
> Sue
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query times on Neo4j. From your
>> experience, how much are the typical query times for large graphs using
>> neo4j for a simple query like:
>> "Find all the first level neighbors of all the nodes in the graph".
>>
&g
; Any help appreciated.
>
> Adnan
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t will still take up some memory in the JVM as
well. I'll see what I can do about it!
>
> Thank you
>
> Alex
>
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-
t; already there, but what I miss is quick access to them.
>>
>> Thank you very much and best regards!
>>
>> Marius
>>
>> --
>> "Programs must be written for people to read, and only incidentally for
>> machines to execute."
>>
>> - Abelson & Sussma
.. where
>> > many indices are created and has a very short lifespan. I assume
>> > you're using the LuceneIndexService#removeIndex(String key) right? I
>> > see that it just clears the index, it doesn't delete the index on
>> > disk. And I s
?
> Thanks,
> canal
> thanks,
> canal
>
>
>
>
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Your high performance graph database.
> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
>
>
>
> On Mon, Jun 21, 2010 at 9:12 PM, Mattias Persson
> wrote:
> > I've whipped up a little patch which does just that... anyone keen on
> > trying it out?
l...
>
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e
> transparently?
>
Sure, that could be a solution, it's not transactionally safe though, but
definately a thing to try out.
>
> -atle
>
> On Tue, Jun 22, 2010 at 8:09 AM, Mattias Persson
> wrote:
> > Neo4j isn't optimized to store big data blobs, so
e: [Neo4j] Store binary data with byte []
>
> Around what size of byte[] should i consider using some other storage
> means than neo4j?
>
> Could it be as easy as just storing the byte[] as a single file
> transparently?
>
> -atle
>
> On Tue, Jun 22, 2010 at 8:09 AM,
ich stores very long strings (at least several
hundred characters each) and it worked quite well.
> -Original Message-
> From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On
> Behalf Of Mattias Persson
> Sent: Tuesday, June 22, 2010 8:40 AM
> To: Neo4j
rcher.search( query, 100 );
>for (ScoreDoc scoreDoc : docs.scoreDocs) {
>Document doc = searcher.doc( scoreDoc.doc );
>fastToLong( doc.getBinaryValue( "_id_" ) );
>}
>}
>
o4j-apoc-1.0.zip>
> from the website and using it for the project.
>
> 3. - RAM, OS and Filesystem of your machine?
>
> 2 Intel Xeon Quad-Core 3.0GHz CPUs
> 96 nodes, each node with 2 Intel Quad-Core Xeon E5440 processo
> RAM - 16 GB(2 GB/Co
; as a single method interface, which is useful for when you want to
> >> implement
> >> your own expansion logic.
> >>
> >> This API is added to trunk so that we can get feedback from everyone who
> >> use
> >> the snapshot builds of Neo4j, if the response to this API isn't
> positive,
> >> it
> >> will probably be removed before the release of 1.1, so please submit
> >> comments in this thread on what you think about this API.
> >>
> >> Happy Hacking,
> >> --
> >> Tobias Ivarsson
> >> Hacker, Neo Technology
> >> www.neotechnology.com
> >> Cellphone: +46 706 534857
> >> ___
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> >>
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around these as far as I know, so we would
> lose
> our ability to monitor.
>
> Any suggestions would be great!
>
> Thanks,
> Alex
>
>
> On Wed, Jun 23, 2010 at 3:52 PM, Mattias Persson
> wrote:
>
> > Also, the latest graph-algo is 0.6-SNAPSHOT... s
tra algorithm in the Graph - Algo package?
> I did not find anything pointing in that direction in the javadocs.
>
> Thanks,
> Bruno Santos
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gt;>
>
>
>
>> Details on my server config:
>>
>> 1. Java version:
>> javac version: javac 1.6.0_18
>> java version: (default) "1.4.2_17"
>> However, while executing the program, I use the java executable 1.6.0_18.
>>
>>
>>
as a
b-tree or some other ??-tree.
>
> atle
>
>
>
>
> On Wed, Jun 23, 2010 at 11:04 AM, Mattias Persson
> wrote:
> > I think the lucene test is flawed since it never returns any results in
> > lookup method. That's why it's so fast :)
> >
> >
00 nodes, but the problem is
>> > still occurring.
>> > Is there a way to iterate all nodes lazily ?
>> >
>> > I'm thinking about a for cycle with long used to ask nodes to batch
>> > inserter, but it doesn't sounds like a good idea.
>&
; 8; i++) {
>array[7 - i] = (byte) (value >>> (i * 8));
>}
>return array;
>}
>
>private static long fastToLong( byte[] array ) throws IOException {
>long value = 0;
>for (int
; --
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> Independent Software Developer
> Professional Profile: http://okidokiteam.com
> t...@okidokiteam.com
> http://www.ops4j.org - New Energy for OSS Communities - Open
> Participation Software.
> ___
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j db?
>
> Oh - and the project (which is bare-bones maven stuff right now) is
> available at http://github.com/neo4j/webadmin
>
> Cheers!
> --
> Jacob Hansson
> Phone: +46 (0) 763503395
> Twitter: @jakewins
> _______
> Neo4j ma
ndex for the value you are searching for has changed.
>
> How is that implemented in neo4j? Do you open a new reader whenever
> you do a search on a dirty index?
>
> -atle
>
>
>
>
>
> On Tue, Jun 29, 2010 at 9:22 AM, Mattias Persson
> wrote:
> > I think
>nodes = index.getNodes( "name", "andy AND larry" ); // -->
>System.out.println("6: nodes size " + nodes.size());
> nodes = index.getNodes( "name", "andy OR larry" ); // --
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2010/7/1 Mohit Vazirani
>
>
>
>
> - Original Message
> From: Mattias Persson
> To: Neo4j user discussions
> Sent: Thu, July 1, 2010 6:53:48 AM
> Subject: Re: [Neo4j] neo4j REST server standalone
>
> Hi, I'm guessing you would like to specify a
heir logical logs or other stuff. Just
a thought... would that be useful?
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A DI VACANZE ?
> * A Riccione i Riviera Park Hotels sono gli alberghi specializzati per le
> vacanze nei parchi divertimento.Vieni nei Riviera Park Hotels! Ti aspettano
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t Neo4j team and community!
Cheers!
> Cheers,
> Jörg
>
>
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> Participation Sof
. Iterable stuff)
org.neo4j.commons.collection.{MapUtil}
org.neo4j.commons.{Pair, Predicate, Service}
Here are some elaborate examples :)
* org.neo4j.useful
* org.neo4j.misc
* org.neo4j.generic
* org.neo4j.shared
It'd be great to hear your oppinion on this.
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2010/7/7 Mattias Persson
> Somewhere in 1.1-SNAPSHOT the neo4j-commons component have been merged into
> kernel (org.neo4j.commons package). Since then numerous people have had
> problems with NoSuchMethodErrors and the reason for that is that they have
> had the latest neo4j-ke
e to retrieve the underlying inserter
> associated with the LuceneIndexBatchInserterImpl please?
>
> Thanks,
> Tim
>
>
>
>
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;>>>> title:"The Right Way" AND text:go
> >>>>>
> >>>>> This would find documents with a title field matching "The Right Way"
> >>>>> and a text field matching "go".
> >>>>>
> >>>>> Is it possible to do this in neo4j and the
> LuceneFulltextIndexService?
> >>>>>
> >>>>> As far as I can seee, the answer is no. If it is the case, how
> difficult
> >>>>> would it be to add such multi field query to the
> LuceneFulltextIndexService?
> >>>>>
> >>>>> Thanks for any help, or at least a confirmation that such multi field
> >>>>> Lucene query is possible or not witn neo4j 1.0.
> >>>>>
> >>>>> Regards,
> >>>>> ---
> >>>>> balazs
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of a problem with 1 million relationships, but anyway,
> I'm just curious ;-) )
> ---
> balazs
>
> On 7/8/10 3:21 PM, Mattias Persson wrote:
> > Yeah, that API isn't stable yet, but I think that it will end up similar
> to
> > that... and hopefully merged in
sition.currentNode().hasProperty("category");
> >>if(returnable) {
> >>if(result.get(currentNode) == null) {
> >>result.put(currentNode, 1);
> >> } else {
> >>
, it's to avoid having to pass around both the batch inserter and the
> index.
> A lot of other APIs provide access to underlying data structures.
>
> Thanks,
> Tim
>
>
>
> ----- Original Message
> From: Mattias Persson
> To: Neo4j user discussions
>
ader$JiraExtractor$Item.updateGraph(JiraLoader.java:240)
>
> Thanks,
> Paul Jackson
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> Marko.
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(MyRelationships.SIMILAR)
.relationships(MyRelationships.CATEGORY)
.prune(TraversalFactory.pruneAfterDepth(2)).traverse(node) ) {
2010/7/8 Mattias Persson
> Your problem is that a node can't be visited more than once in a traversal,
> right? Have you looked at the new traversal frame
(node) ) {
2010/7/9 Mattias Persson
> Just to notify you guys on this... since as of now (r4717) the
> TraversalFactory class is named Traversal instead, so code would look like:
>
> for ( Node currentNode : TraversalFactory.description()
>
> .breadth
nce the population is finished, the final commit is done, and the graph
> db
> > closed - the heap stays like that - almost full. An explicit gc will
> clean
> > up some part, but not fully.
> >
> > Arijit
> >
> > On 9 July 2010 17:00, Mattias Persson wr
st one by using sublist's.
> - You're retrieving the reference node for each iteration, rather than
> just once outside the loop in fillNodes.
> - Why are you converting the weight-property to a string, to then
> convert it to a Doub
e the node I'm supposed to look at when filtering during
>> > traversal?
>> >
>> > Thanks,
>> > Christian
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//
>
> // the Route class:
> public static final String COUNT = "count";
> public Integer getCount()
> {
> return (Integer)node.getProperty(COUNT);
> }
>
> ////////
>
>
>
>
> __
Ah, great you found the problem!
2010/7/13, Tim Jones :
>
>
>
>
> - Original Message
> From: Mattias Persson
> To: Neo4j user discussions
> Sent: Tue, July 13, 2010 2:57:33 PM
> Subject: Re: [Neo4j] getProperty returning wrong value
>
> 2010/7/13,
t will try to open
that graph database in the shell client JVM. If you skip that -path option
it will try to connect via RMI to a remotely enabled shell server instead
and you'll get a remote client with read/write capabilities.
See more information about this over at
http://wiki.neo4j.org/con
you,
> Marko.
>
> http://markorodriguez.com
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DB + Index)?
>
>
>
>
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=120M
> neostore.relationshipstore.db.mapped_memory=5G
> neostore.propertystore.db.mapped_memory=100M
> neostore.propertystore.db.strings.mapped_memory=200M
> neostore.propertystore.db.arrays.mapped_memory=0M
>
> What's the problem?!
>
>
>
>
> From: Mattias Persson
interface or
the EmbeddedGraphDatabase implementation in particular?
>
>
>
> From: Mattias Persson
> To: Neo4j user discussions
> Sent: Fri, July 16, 2010 5:53:08 PM
> Subject: Re: [Neo4j] Neo4j Tuning for specific application
>
> 2010/7
nted as an additional service?
> ---
> balazs
>
> On 7/8/10 4:11 PM, Mattias Persson wrote:
> > No, (lucene) indexing won't be implemented into getRelationships (it
> would
> > totally break performance). However there are possibilities to create
> some
> >
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others able to use this? Am I doing something wrong?
>
> Maybe I should just wait until your changes go in?
>
> Thanks,
> Andrew.
>
> On Tue, Jul 20, 2010 at 12:38 PM, Mattias Persson <
> matt...@neotechnology.com
> > wrote:
>
> > Sorting by relevance is
4j.org/mailman/listinfo/user
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