Not at all, I'm glad potential issues comes out in the open immediately and
don't stay and get people frustrated. That this particular issue was
unrelated to neo4j doesn't change that. Keep all the feedback coming, it
makes neo4j improve and evolve.
Best,
Mattias
2011/6/27 Craig Taverner
Reading the javadoc:
Invoked after the transaction has been rolled back if committing the
transaction failed for some reason.
so it wont be notified about transactions that never even start to commit.
That's why you don't get any notifications about such transactions. Is there
any specific
Hi,
I am very new to Neo4j and curious to know whether one can store tree of
objects in the database. Just for sake of brevity, in our context it (the
database) will be storing a tree of inter-connected services deployed on an
infrastructure. As the services are deployed on the servers/hosting
Hi Wolfgang,
Neo4j is a good fit for this kind of domain. There are people on this list who
(confidentiality permitting) may vouch that using Neo4j to manage
infrastructure deployments is quite sensible.
In my mind the key benefit is rapidly being able to traverse the tree for fault
finding
Hi!
On 06/27/2011 12:40 PM, Wolfgang Schuller wrote:
@List Administrator: is there any archive for this list available which can
be searched, the list under http://lists.neo4j.org/pipermail/user/ is merely
a plain (non-searchable) archive.
http://neo4j-user-list.438527.n3.nabble.com/
Hi, I'm starting to use Neo4j with the ruby neography library. Everything it's
working, I'm correctly managing nodes, relations and indexes (it would be
great something less manual, in order to have a faster boot/setup/learning
curve). But now I'm having a little problem on doing one thing:
Hi Stefan,
These are good points, and I don't think we have yet reached a mature level of
best practice as the relational folks have. But I don't think graph modelling
is too hard. I have a couple of rules of thumb:
1. Model entities as entities and use relationships to describe how those
Neo4j has replication as I understand. Is it possible to explictly mark
which subtrees must be replicated i.e. send a subtree from one neo4j
database to another. A sort of peer to peer. I know HypergraphDB seems to
support this. Also they attach a UUID on each node so that the nodes
preserve their
Hi Sidarth,
Neo4j makes full replicas from master to slaves.
Jim
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Hi,
So, an explicit failure() in a transaction doesn't count as a
transaction failed for some reason then?
I have a counter for the number of nodes created and written to DB in
each transaction in the current thread. When the transaction fails, I
would like to know about it and not count
Hi Jim,
thanks for taking the time to answer my newbie questions! We were
thinking about trying to spread anything that could be usefully queried
over multiple nodes to enhance the search algorithms. Just when I saw
the firts graph forming, it seemed like jungle that my brain couldn't
Hi,
Everyone who is in the region is welcomed to come along. If not, please help
spread the word to your German friends and colleagues :)
http://www.meetup.com/graphdb-berlin/
Cheers
Michael
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thanks for the informative reply , to add more , the social networking
website will be geo aware and some spatial info also needs to be
stored like the coordinates of the user node or the coordinates of
the location\place how can we add more also will neo4j alone + spatial
suffice ? can there be
Michael,
unfortunately, I live too far away (in the south); otherwise I would've
come. Thanks for the invite, the group is great idea.
Stefan
Am 27.06.2011 15:42, schrieb Michael Hunger:
Stefan,
as you're in Germany you probably want to come along to our Berlin
Graph-Meetup tomorrow
On Mon, Jun 27, 2011 at 7:17 AM, Stefan Zapf ste...@nerdocracy.org wrote:
In relational database design, there are normal forms to guide the
design process. Are there similar prinicples that apply to the design of
graph databases like neo4j?
I haven't done anything with Neo4J yet, but in the
Couldn't you count those in afterCommit instead? That way you would be sure
to update your counter (which isn't stored in neo4j?) for stuff that's
actually committed.
2011/6/27 Balazs E. Pataki pat...@dsd.sztaki.hu
Hi,
So, an explicit failure() in a transaction doesn't count as a
transaction
Hi,
I can comment on the spatial side. The
neo4j-spatialhttps://github.com/neo4j/neo4j-spatiallibrary provides
some tools for doing spatial analysis on your data. I do
not know exactly what you plan to do, but since you mention user and place
locations, I guess you are likely to be asking the
I know but I want to be in charge of replication. Decide which subtree moves
and so on...
On Mon, Jun 27, 2011 at 6:47 PM, Jim Webber j...@neotechnology.com wrote:
Hi Sidarth,
Neo4j makes full replicas from master to slaves.
Jim
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Hello Neo4j people,
For those that are interested, I've posted my WindyCityDB slides to SlideShare.
This is a very visual introduction to graph databases and traversal-based
querying using Gremlin.
http://www.slideshare.net/slidarko/the-pathology-of-graph-databases
Enjoy,
Marko.
Good Monday to you all, Graphistas,
Just some quick news about worldwide meetups...
Vancouver:
We're pleased to announce that a Meetup group is establishing itself in
Vancouver[1], with the help of our good friend Paddy Fitzgerald. Anyone in the
area, please join us for the kick-off meeting
Hi,
Since there is now possible to send off batches of operations via the REST
interface, I was wondering if anyone has started to look at implementing
transactions in the java REST client (
https://github.com/jexp/neo4j-java-rest-binding) ?
It would seem possible, but I can also see it could
Hello,
I am using neo4j in a school project. I was wondering if anyone could point
me to a scientific paper or proof of concept - something with actual data -
that would be useful to build a document that would prove graph databases to
be more suited (performance, scalability and efficiency) to a
Hi Aliabbas,
It's quite feasible to run multiple graph DBs, that's just manual sharding. In
your application you own the mapping to which of the graph DBs you want to
interact with, and your app also reifies links between instances.
But do try a single instance first (with slave replication
Hi!
I'm currently evaluating Neo4J for a project, but I'm not sure if it is the
right solution. Maybe you could help me by looking at my scenario. I have
ca. 10 different types of nodes with properties which have directed
relationships. Some types can only be connected to other types but others
On Sat, Jun 25, 2011 at 2:59 AM, Michael Hunger
michael.hun...@neotechnology.com wrote:
Massimo,
when profiling this it quickly becomes apparent that the issue is within the
lucene document.
(org.apache.lucene.document.Document)
it holds an arraylist of all its fields which amount to all
In 1973, Charles W. Bachman received The Turing Award for his work on
navigational databases, conceptually a cousin of the graph database model.
Here is a link to his Turing Award Lecture:
Massimo,
could you please look into the Lucene Document instance that you add all the
fields to?
If it also contains this ultralarge ArrayList with all the Fields ?
And which version of lucene did you use for your standalone testing?
Cheers
Michael
Am 27.06.2011 um 23:04 schrieb Massimo
== Weekly Report ==
Not too much time dedicated to code. Me and my mentor we are trying to solve
some import problems. We found version mismatch of some pluings
dependencies, so the plugins does not work properly in uDig. These days I
will fix the issues and I will restart with coding.
Something like:
@neo.traverse(node1,paths, {order = breadth first,
uniqueness = relationship path,
relationships = {type=
knows, direction = out},
return filter = {
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