[Neo4j] How does Traversal work in Neo4j?

I have a problem that I described in graphgist ( http://gist.neo4j.org/?a0bc29b21622a2f19a36). I have 5 users and each user has 2 friends. //USERS 1,2,3,4,5 //FRIENDS 1 -> 2,3 2 -> 1,5 3 -> 4,5 4 -> 2,3 5 -> 2,4 With the information above, I do traversal from depth 2 to depth 5. To do

Re: [Neo4j] Does anyone know why Graph Database (Neo4j) consumes more memories(RAM) and has bigger file size(graph.db) than Relational's?

Thank you for the explaination Chris. On Monday, May 26, 2014 10:31:03 PM UTC+7, Chris Vest wrote: > > > On 26 May 2014, at 16:39, Rio Eduardo > > wrote: > > 1. For Memory => Is it because Neo4j stores data in RAM? or are there > other causes? > > > It cache

[Neo4j] Does anyone know why Graph Database (Neo4j) consumes more memories(RAM) and has bigger file size(graph.db) than Relational's?

1. For Memory => Is it because Neo4j stores data in RAM? or are there other causes? 2. For Disk => Is it because Neo4j store all of relationships? or are there other causes? Can anyone explain it and give me any references that can explain it why? Thank you. -- You received this message becau

Re: [Neo4j] What is the content of rrd file actually?

.com/in/neubauer > T: @peterneubauer <http://twitter.com/peterneubauer> > > Open Data- @mapillary <http://mapillary.com/> > Open Source - @neo4j <http://neo4j.org/> > Open Future - @coderdojo <http://malmo.coderdojo.se/> > > > On Wed, May 7, 2014 a

[Neo4j] What is the content of rrd file actually?

t? And if rrd is useful, what is rrd file for? Thanks in advance. Best regards, Rio Eduardo -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to neo4j+unsubscr...@g

[Neo4j] Re: Indexing on relationships

You can use auto indexing. # Enable auto-indexing for relationships, default is false #relationship_auto_indexing=true # The relationship property keys to be auto-indexed, if enabled #relationship_keys_indexable=name,age But if you want indexes like using labels, I think there is no labels for

[Neo4j] Re: Traversal to find friends of friends that are not friends with the user yet

so any solutions for this case, Lundin? Please help. Thank you. On Saturday, April 5, 2014 7:41:51 PM UTC+7, Rio Eduardo wrote: > > I already tried like you did before you did it > if (position.length()>2){position.length()>2}else{position.length()>1} > > and again it

[Neo4j] Re: Traversal to find friends of friends that are not friends with the user yet

t; test the length before doing the filtering > if (position.length()>2){position.length()>2}else{position.length()>1} > would work in both cases. > > Den lördagen den 5:e april 2014 kl. 06:23:59 UTC+2 skrev Rio Eduardo: >> >> yeah because if the model graph is changed, the

[Neo4j] Re: Traversal to find friends of friends that are not friends with the user yet

age":"builtin"}, > > "return_filter":{ "body":"position.length()>2", "language":"javascript" }, > "relationships":{"direction":"out","type":"FRIEND"},"max_depth"

[Neo4j] Re: Traversal to find friends of friends that are not friends with the user yet

I'm sorry Lundin, I asked the wrong question. I meant how to check if there are only 3 depth level in graph? On Saturday, April 5, 2014 7:25:48 AM UTC+7, Rio Eduardo wrote: > > Lundin, Do you know the way how to count many relationships in the graph > because I don't see i

[Neo4j] Re: Traversal to find friends of friends that are not friends with the user yet

path length ? > endNod() is not the only method for the position object(the path), Mabey > position.length>1 or something. > > Den fredagen den 4:e april 2014 kl. 18:10:33 UTC+2 skrev Rio Eduardo: >> >> Please anyone in this group help me. I already posted my problem at >&

[Neo4j] Re: Traversal to find friends of friends that are not friends with the user yet

wrote: > > Have you tried experimenting with ther filter and the path length ? > endNod() is not the only method for the position object(the path), Mabey > position.length>1 or something. > > Den fredagen den 4:e april 2014 kl. 18:10:33 UTC+2 skrev Rio Eduardo: >> >>

[Neo4j] Traversal to find friends of friends that are not friends with the user yet

Please anyone in this group help me. I already posted my problem at http://stackoverflow.com/questions/22861424/neo4j-traversal-to-find-friends-of-friends-that-are-not-friends-with-the-user Thank you. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. T

Re: [Neo4j] How to return node property(id, name, etc) in rest api traverse neo4j?

d/milestone/tutorial-traversal-java-api.html > > a prune(evaluator) says which relationships not to follow. > > > > > On Wed, Apr 2, 2014 at 8:18 PM, Rio Eduardo > > wrote: > >> I just read and learn about rest api traverse neo4j. And I'm wondering if &

[Neo4j] How to return node property(id, name, etc) in rest api traverse neo4j?

I just read and learn about rest api traverse neo4j. And I'm wondering if there is a way to return node property only because all of examples return results in Json. Or all rest api will return results in Json? And I would ask you some other questions, Ok, Rest Api Traverse has 7 methods that ar

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

Thank you so much Michael. it's obviously in the docs. On Wednesday, April 2, 2014 12:50:26 PM UTC+7, Michael Hunger wrote: > > It is also supported via the rest api > > You find it in the docs > > Sent from mobile device > > Am 02.04.2014 um 06:47 schrieb Rio Edua

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

not through java. Thank you. On Tuesday, April 1, 2014 8:31:25 PM UTC+7, Michael Hunger wrote: > > For the traversal framework check out: > http://docs.neo4j.org/chunked/milestone/tutorial-traversal.html > > > On Tue, Apr 1, 2014 at 3:09 PM, Rio Eduardo > > wrote: &g

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

]->(FFU:User) > WHERE U.user_id=1 > WHERE FFU<>U > WITH DISTINCT U, FU, FFU > > MATCH (FFU:User)-[:Friend]->(FFFU:User) > WHERE FFFU<>FU > WITH DISTINCT U, FFU, FFFU > > MATCH (FFFU:User)-[:Friend]->(FFFFU:User) > WHERE U<>FFU AND

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

Thank you. On Tuesday, April 1, 2014 8:31:25 PM UTC+7, Michael Hunger wrote: > > For the traversal framework check out: > http://docs.neo4j.org/chunked/milestone/tutorial-traversal.html > > > On Tue, Apr 1, 2014 at 3:09 PM, Rio Eduardo > > wrote: > >> Hi Micha

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

ou really want to do these deep traversals you might be > better off (in terms of performance) using the traversal-API with an > appropriate uniqueness constraint, like node-path. > > > > > On Mon, Mar 31, 2014 at 1:09 PM, Rio Eduardo > > wrote: > >> Hello again

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

) > > In general if you really want to do these deep traversals you might be > better off (in terms of performance) using the traversal-API with an > appropriate uniqueness constraint, like node-path. > > > > > On Mon, Mar 31, 2014 at 1:09 PM, Rio Eduardo > > wrote: &

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

ser)-[FF:Friend]->(FFU:User)-[FFF:Friend]->(FFFU:User) > WHERE U.user_id=1 > WITH DISTINCT U, FU, FFU > WHERE FFU<>U > WITH DISTINCT U, FFU > MATCH (FFU:User)-[FFF:Friend]->(FFFU:User) > WHERE NOT (U)-[:Friend]->(FFFU) > RETURN distinct FFFU.username; > > >

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

HERE NOT (U)-[:Friend]->(FFFU) > RETURN distinct FFFU.username; > > > > > On Sun, Mar 30, 2014 at 1:29 PM, Rio Eduardo > > wrote: > >> Please help me again Michael. >> >> You ever said: >> >> I would also change: >> >> MA

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

> MATCH (n:User)-[:Friend*3]-(FoFoF) return FoFoF; > > > > Albeit a valid search is it something useful ? I would think finding a > specific persons FoFoF in either end, as a starting point or end point, > would be a very realistic scenario. Adding an Index on User:name and q

Re: [Neo4j] Why can't I drop Constraint?

ucene was still writing to the backing files. > > Caused by: java.io.IOException: Cannot delete C:\Users\Olivia > Stella\Documents\Neo4j\DB_1000\schema\index\lucene\3\_0.fdt > > > > > On Sun, Mar 30, 2014 at 10:45 AM, Rio Eduardo > > > wrote: > >> Oh ok, her

[Neo4j] Why can't I drop Constraint?

I create constraint in Neo4j Shell(2.0.1) with this syntax => CREATE CONSTRAINT ON(U:User) ASSERT U.user_id is UNIQUE; And can see the schema with this syntax => schema ls -l :User but when I want to drop contraint with this syntax => DROP CONSTRAINT ON(U:User) ASSERT U.user_id is UNIQUE; it ret

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

ds more cost on insertion > index is optimizing lookups > > Depends on your needs, one property might be unique so you want a > constraint > other properties you might want to search by, so you add an index. > > > > On Sat, Mar 29, 2014 at 3:33 AM, Rio Eduardo > > wrote

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

n:User)-[:Friend*3]-(FoFoF) return FoFoF; > > > > Albeit a valid search is it something useful ? I would think finding a > specific persons FoFoF in either end, as a starting point or end point, > would be a very realistic scenario. Adding an Index on User:name and quer

[Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

ib/graphgist/wiki > > Den fredagen den 28:e mars 2014 kl. 05:00:22 UTC+1 skrev Rio Eduardo: >> >> Thank you so much for the reply Lundin. I really apreciate it. Okay, >> yesterday I just tested my experiment again. And the result was not what I >> imagined and exp

[Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

> good to prove graph theory. > > What is the result of MATCH(U:User) RETURN count(U); ? > > Also when you do your test make sure to add the warm/cold cache effect > (better/worse performance) > > Den torsdagen den 27:e mars 2014 kl. 17:57:10 UTC+1 skrev Ri

[Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

all features are explained. So which Neo4j should I use for my case that has millions nodes and relationships? Please answer. I need your help so much. Thanks. On Tuesday, March 25, 2014 12:03:58 AM UTC+7, Rio Eduardo wrote: > > I'm testing my thesis which is about transforming from

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

s on unix systems. > It also exists for windows. > > http://localhost:7474/db/data/transaction/commit is an http API url, not > something you point your browser to > > Cheers > > Michael > > > > On Tue, Mar 25, 2014 at 4:53 AM, Rio Eduardo > > wrote: >

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

you mean Neo4j can't handle 1 Million nodes in lower specification of pc? On Tuesday, March 25, 2014 6:45:12 PM UTC+7, Michael Hunger wrote: > > Yes totally, should be no problem > > Sent from mobile device > > Am 25.03.2014 um 12:26 schrieb Rio Eduardo > >: >

[Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

? My specification of PC: CPU: Intel Core i7 Memory: 4GB DDR3 HardDisk: 300GB SATA Operation System: Windows 7 Neo4j: 2.0.1 Please help me. Thanks. On Tuesday, March 25, 2014 12:03:58 AM UTC+7, Rio Eduardo wrote: > > I'm testing my thesis which is about transforming from relational data

Re: [Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

gt; +--+ > 1 row > 186 ms > > > > On Mon, Mar 24, 2014 at 8:46 PM, Javad Karabi > > wrote: > >> make sure you are setting up your indexes. >> this was something that i did not do at first, but once i realized how >> important it was, my queries were inc

[Neo4j] Re: Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

l for querying this amount of data. > > Thanks, > > Kenny > > On Monday, March 24, 2014 10:03:58 AM UTC-7, Rio Eduardo wrote: >> >> I'm testing my thesis which is about transforming from relational >> database to graph database. After transforming from relati

[Neo4j] Why is Neo4j slower(totally dead) with many nodes and relationships in lower specification of pc/notebook while MySQL is not?

I'm testing my thesis which is about transforming from relational database to graph database. After transforming from relational database to graph database, I will test their own performance according to query response time and throughput. In relational database, I use MySQL while in graph data

[Neo4j] How to order by the result of combining multiple collect?

I have a query like this: MATCH (a)-[:Shout]->(b) WHERE a.user_id=1 WITH b.post_id as b_post_id, a, b.post as b_post MATCH (a)-[:Friend]->(c)-[:Shout]->(d) WITH d.post_id as d_post_id, b_post_id, d.post as d_post, b_post order by d_post_id desc, b_post_id desc RETURN collect(distinct d_post) + col

[Neo4j] How to return random records in Neo4j using Cypher?

I have query like this: $query = "MATCH (U:User) RETURN U ORDER BY RAND() LIMIT 100"; But when I run this, this shows errors. It says: Caught Exception: Unable to execute query [400]: Headers: Array ( [Content-Type] => application/json; charset=UTF-8; stream=true [Access-Control-Allow-Orig

Re: [Neo4j] Can Limit have more than 1 parameter?

Thank you so much Michael! It works! On Saturday, February 1, 2014 1:43:34 PM UTC+7, Michael Hunger wrote: > > SKIP offset LIMIT count > > Am 01.02.2014 um 07:12 schrieb Rio Eduardo > >: > > According to http://docs.neo4j.org/chunked/milestone/query-limit.html, >

[Neo4j] Can Limit have more than 1 parameter?

According to http://docs.neo4j.org/chunked/milestone/query-limit.html, Limit just have 1 parameter while I have a query that should have 2 parameters: MATCH (u:User)-[r:Comments]->(c:Comment)-[s:On]->(p:Post) WHERE p.post_id={post_id} RETURN u,r,c,s,p ORDER BY c.comment_id DESC LIMIT {second_co

Re: [Neo4j] How to start neo4j-community-2.0.0-unix.tar.gz manually in ubuntu?

Thanks it works. On Sunday, January 5, 2014 8:50:53 PM UTC+7, Michael Hunger wrote: > > then try bin/neo4j-installer remove > > Haven't done it myself, yet. So, currently just guessing. > > > On Sun, Jan 5, 2014 at 2:46 PM, Rio Eduardo > > wrote: > >&g

Re: [Neo4j] How to start neo4j-community-2.0.0-unix.tar.gz manually in ubuntu?

bin/neo4j remove > Removes the automatic startup entries > > > > Sent from mobile device > > Am 05.01.2014 um 12:00 schrieb Rio Eduardo > >: > > there is no symlinks file in /etc/init. so what should I do? > > Thanks. > > On Sunday, January 5, 2014 3:29:08 PM

Re: [Neo4j] How to start neo4j-community-2.0.0-unix.tar.gz manually in ubuntu?

there is no symlinks file in /etc/init. so what should I do? Thanks. On Sunday, January 5, 2014 3:29:08 PM UTC+7, Peter Neubauer wrote: > > Think you need to remove the symlinks in /etc/init... As with other > services. > > /peter > > (snt)-[:frm]->(phn) > On Jan 5,

[Neo4j] How to start neo4j-community-2.0.0-unix.tar.gz manually in ubuntu?

I have neo4j-community-2.0.0-unix.tar.gz installed in my ubuntu. But it always start automatically on start up. And I want to start it manually. So, any tutorials for it? Thank you. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from

[Neo4j] How to make an Index in Neo4j using PHP?

I want to make an index in every node I will make. According to this answerto make an index is like this: $client = new Client(new Transport('localhost', 7474)); $user = new Node($client); $user->setProperty

Re: [Neo4j] How to install the latest neo4j(Neo4j 2.0 beta) in ubuntu?

I'm sorry I still don't get what you meant. On Thursday, January 2, 2014 6:26:22 PM UTC+7, Michael Hunger wrote: > > I meant: how did you "actually import" the data. > > Micheal > > Am 02.01.2014 um 10:07 schrieb Rio Eduardo > >: > > I just follo

Re: [Neo4j] How to install the latest neo4j(Neo4j 2.0 beta) in ubuntu?

l Hunger wrote: > > That can be either some log files or some deleted data that has still > records reserved in the store files. > > Perhaps your import didn't work? How did you import the data. > > Michael > > Am 01.01.2014 um 04:19 schrieb Rio Eduardo > >: >

Re: [Neo4j] How to install the latest neo4j(Neo4j 2.0 beta) in ubuntu?

der > > Sent from mobile device > > Am 30.12.2013 um 15:13 schrieb Rio Eduardo > >: > > I already checked conf/neo4j-server.propertie and it points to the right > location. You can see the image for sure. > > On Saturday, December 28, 2013 10:17:57 PM UTC+7,

Re: [Neo4j] How to install the latest neo4j(Neo4j 2.0 beta) in ubuntu?

evice > > Am 28.12.2013 um 15:55 schrieb Rio Eduardo > >: > > Hey Michael, after I use my old graph db(my.graphdb), why I can't see my > graph that I already made before? when I run "match n return n", it > displays nothing. > > do you know why? >

Re: [Neo4j] How to create new database and use the existing database in neo4j in ubuntu?

Hey Michael, after I use my old graph db(my.graphdb), why I can't see my graph that I already made before? when I run "match n return n", it displays nothing. do you know why? thank you. On Saturday, December 28, 2013 11:29:50 AM UTC+7, Rio Eduardo wrote: > > Thank you s

Re: [Neo4j] How to install the latest neo4j(Neo4j 2.0 beta) in ubuntu?

Hey Michael, after I use my old graph db(my.graphdb), why I can't see my graph that I already made before? when I run "match n return n", it displays nothing. do you know why? thank you. On Wednesday, December 11, 2013 5:08:20 PM UTC+7, Rio Eduardo wrote: > > Thanks Joh

Re: [Neo4j] How to create new database and use the existing database in neo4j in ubuntu?

lp you directly > > chown -R neo4j:neo4j /data/my.graphdb > > > Sent from mobile device > > Am 27.12.2013 um 15:26 schrieb Rio Eduardo > >: > > I already followed your instruction -> chown -R neo:neo > /data/my.graphdb > but it said chown: invalid user: ‘

Re: [Neo4j] How to create new database and use the existing database in neo4j in ubuntu?

irectory and all files and folders below it have to be readable > and writable for the user running neo4j. Whichever that is on your system, > by default the user is called "neo4j" > > HTH > > Mcihael > > Am 19.12.2013 um 01:40 schrieb Rio Eduardo >

Re: [Neo4j] How to create new database and use the existing database in neo4j in ubuntu?

and one for neo > > change the permissions on the graphd.db directory so that it belongs to > the neo user > > chown -R neo:neo /data/graph.db > > Michael > > Am 17.12.2013 um 18:27 schrieb Rio Eduardo > >: > > so what should I do? I have no ideas. Thank y

Re: [Neo4j] Re: How to create new database and use the existing database in neo4j in ubuntu?

so what should I do? I have no ideas. Thank you. On Tuesday, December 17, 2013 11:27:50 PM UTC+7, Lasse Westh-Nielsen wrote: > > > > > On 17/12/2013, at 17.14, Rio Eduardo > > wrote: > > > > the log says: > > > > [...] Caused by: java.io.FileNot

Re: [Neo4j] Re: How to create new database and use the existing database in neo4j in ubuntu?

DEBUG [API] Failed to start Neo Server on port [7474] On Tuesday, December 17, 2013 11:01:08 PM UTC+7, Lasse Westh-Nielsen wrote: > > > > On 17/12/2013, at 16.56, Rio Eduardo > > wrote: > > > > [...] it says Neo4j Server may have failed to start, please check

[Neo4j] Re: What is the difference between installing neo4j with debian packages that is provided by neo4j and installing neo4j with package.tar.gz?

ow the usual standards. i.e: neo4j > executable would be in usr/bin. > probably the conf will be in /etc/conf... and so on. > > If you download the .tar.gz neo4j config files, executable and data folder > will live in a single folder. > > > On Tuesday, December 17, 20

[Neo4j] Re: How to create new database and use the existing database in neo4j in ubuntu?

December 17, 2013 3:26:07 PM UTC, Rio Eduardo wrote: >> >> do you mean just replace data/graph.db with data/another_graph.db? >> >> On Tuesday, December 17, 2013 8:54:34 PM UTC+7, JDS wrote: >>> >>> If I understand you correctly you're trying to run mul

[Neo4j] Re: How to create new database and use the existing database in neo4j in ubuntu?

Tuesday, December 17, 2013 3:26:07 PM UTC, Rio Eduardo wrote: >> >> do you mean just replace data/graph.db with data/another_graph.db? >> >> On Tuesday, December 17, 2013 8:54:34 PM UTC+7, JDS wrote: >>> >>> If I understand you correctly you're tryin

[Neo4j] Re: How to create new database and use the existing database in neo4j in ubuntu?

server.pid > wrapper.lockfile=../data/neo4j-server.lck > > On Tuesday, December 17, 2013 1:33:46 PM UTC, Rio Eduardo wrote: >> >> >> No, not in Java Gupta, I meant the folder that named *graph.db*. Because >> in windows, we can simply make it, when we start the neo

[Neo4j] What is the difference between installing neo4j with debian packages that is provided by neo4j and installing neo4j with package.tar.gz?

//Installing neo4j with debian package # start root shell sudo -s # Import our signing key wget -O - http://debian.neo4j.org/neotechnology.gpg.key | apt-key add - # Create an Apt sources.list file echo 'deb http://debian.neo4j.org/repo stable/' > /etc/apt/sources.list.d/neo4j.list # Find out abo

[Neo4j] Re: How to create new database and use the existing database in neo4j in ubuntu?

, December 13, 2013 12:55:29 PM UTC+7, Abhishek Gupta wrote: > > On Wednesday, 11 December 2013 19:18:17 UTC+5:30, Rio Eduardo wrote: >> >> How to create new database in neo4j in ubuntu? >> > > > http://docs.neo4j.org/chunked/stable/tutorials-java-embedded-hello-world