voted for it
2010/5/4 Craig Taverner cr...@amanzi.com
Hi guys,
I've applied to present Neo4j Spatial (Neo4j as a true GIS database for
mapping data) at the FOSS4G conference in September. To increase the
chances
of the presentation getting accepted, it helps to get community votes. So,
if
We have stress tested neo4j with over 500 concurrent users in a webapp with
a smaller dataset and we found no performance issues.
We even wrap their api in a domain layer that adds some extra overhead.
One thing to keep in mind is that if your data ever grows to a point where
it needs to be
That makes sense, I'll give it a try, thanks!
2010/2/26 Mattias Persson matt...@neotechnology.com:
2010/2/26 Raul Raja Martinez raulr...@gmail.com:
Hi Mattias,
Thanks for the docs.
I'm trying to solve this issue now and here is the problem I'm facing...
Where it says in the wiki:
Rewrite
We setup an fs based graph on the jvm java.io.tmp folder and destroy
on every setup() teardown() if necessary.
This is how all of our unit tests run and it works fine.
An in memory store may give you a false view on how things work if one
of the things you are testing is performance, specially in
) {
log.error(permanent failure after attempt + i);
}
} finally {
tx.finish();
}
}
return result;
}
}
2010/2/26 Raul Raja Martinez raulr...@gmail.com:
That makes sense, I'll give it a try, thanks!
2010/2/26 Mattias
{
tx.finish();
}
return result;
}
}
2010/2/22 Mattias Persson matt...@neotechnology.com:
I wrote a reply to this, but decided to put it on the wiki instead...
so head over to http://wiki.neo4j.org/content/Transactions#Deadlocks
and read all about it :)
2010/2/22 Raul Raja
If your resultset returns too many records is going to be slow sorting
after retrieving the results.
If you results have to be paginated in most cases you have to sort
over the full resultset.
Also if you plan to get things ordered by multiple properties you need
some kind of btree structure.
This
Hi,
I was wondering if it is possible to reset a traverser iterator.
Looking at the Traverser interface comment it says...
// Doc: especially remove() thing
/**
* Returns an {...@link Iterator} representing the traversal of the graph.
The
* iteration is completely lazy in that it
Hi,
I have some code that runs in parallel through a Thread pool executor.
I'm getting the following exception:
publish exception: class
org.neo4j.kernel.impl.transaction.DeadlockDetectedException :
Transaction[Status=STATUS_ACTIVE,ResourceList=Xid[GlobalId[NEOKERNL|1266821950597|383448],
Hi Sumanth,
You can have all your questions and answers be nodes that are connected
through relationships that are your tags.
For any kind of filtering you can have Traversers with returnable evaluators
that evaluate the kind of results you want back from you graph structure.
So the basic answer
Hi DMitri, are you running JMeter distributed with many agents?
Is the sample data sent to each servlet for each JMeter agent the same?
Our experience with JMeter is that when running multiple threads on a single
machine the numbers don't really give you a close grasp or reality. Also
their http
a required
number of VPS'es and gen agent per thread environment (not sure,
however, if this will be a not too expensive solution) ?
Thanks for sharing your experience,
Dmitri
Raul Raja Martinez wrote:
Hi DMitri, are you running JMeter distributed with many agents?
Is the sample data sent
delete the entire database.
We could however have some kind of utility where you specify criterias
to traverse and delete, but then again you could probably use the
traverser api for that.
Does that make enough sense to you?
2010/2/10, Raul Raja Martinez raulr...@gmail.com:
Any plans
Any plans to support cascade deletion?
We currently have some cases where we have to manually iterate over
the relationships and remove them.
Not a big deal because we wrap many other operations but something
that would nice to have out of the box.
2010/2/9 Mattias Persson
Thanks!
2010/2/7 Johan Svensson jo...@neotechnology.com
Fix committed to kernel and index trunks.
-Johan
On Sat, Feb 6, 2010 at 10:33 PM, Raul Raja Martinez raulr...@gmail.com
wrote:
Yes, that's right, Thanks!
2010/2/6 Mattias Persson matt...@neotechnology.com
Oh, I got
together with
tm_tx_log.1 tm_tx_log.2 logs next time it happens.
Regards,
-Johan
On Thu, Feb 4, 2010 at 7:33 PM, Raul Raja Martinez raulr...@gmail.com
wrote:
I'm not sure if this is a known bug or it has already been fixed.
I'm seeing this in 1.0-b11-SNAPSHOT.
Sometime after killing
to be able to
have multiple relationships of the same type with the same source node and
target node, in the case of this bug however you end up with two copies (in
the in-memory cache, not on disk) of the exact same relationship.
Cheers,
Tobias
On Thu, Feb 4, 2010 at 12:18 AM, Raul Raja Martinez
I'm not sure if this is a known bug or it has already been fixed.
I'm seeing this in 1.0-b11-SNAPSHOT.
Sometime after killing an app running Neo I'm unable to restart the
app as it always fails creating the EmbeddedNeo object.
Caused by: org.neo4j.impl.transaction.TransactionFailureException: No
of the same type
attached to the same node with the same id? or is this a bug?
2010/2/3 Raul Raja Martinez raulr...@gmail.com:
...ThreadPoolTaskExecutor#7ec48b77-42 02/03 exception: class
org.neo4j.api.core.NotFoundException : More than one
relationship[DynamicRelationshipType[profile], OUTGOING] found
Same issue here.
Would be nice to have something like
node.hasRelationshipTo(node, relationship... relationships);
2010/2/2 Maria Giatsoglou mgiat...@csd.auth.gr:
Hello all
I am creating a project that performs a number of benchmark tasks on Neo.
One of the tests measures the required time
transactions, however that way you'll
only be notified before and after a transaction is committed, not
_what_ was committed.
If any of those suggestions would be useful I'd be happy to give an
example of such code.
2010/1/14 Raul Raja Martinez raulr...@gmail.com:
Hi Tobias,
At this time we
What would be the outcome of two transactions committing changes to the same
property in different threads?
Given this scenario
Thread#1
Starts transaction at 12:00
Changes property title on Node#1 to first
Commits transaction at 12:04
Thread#2
Starts transaction at 12:01
Changes property
!
Cheers,
Tobias
On Thu, Jan 14, 2010 at 1:32 AM, Raul Raja Martinez raulr...@gmail.comwrote:
Hi,
Does neo4j provide some way for adding listeners to the transaction
lifecycle?
We would like to intercept when transacions are commited, created and
rolledback to provide our own functionality
or in all of them at once if the transactions are distributed.
Thanks!
2010/1/14 Raul Raja Martinez raulr...@gmail.com:
Hi Tobias, thanks for the info!
I'm gonna consult with my team and we'll get back with some suggestions.
2010/1/14 Tobias Ivarsson tobias.ivars...@neotechnology.com:
Hi Raul
I think the problem is that everything is in a big transaction. Try
splitting in smaller transactions
On Jan 14, 2010 6:33 PM, Defenestrator defenestration...@gmail.com
wrote:
How is memory managed in neo4j, does it page data out to disk like all
database systems?
Here's a sample program that
Hi,
Does neo4j provide some way for adding listeners to the transaction lifecycle?
We would like to intercept when transacions are commited, created and
rolledback to provide our own functionality
for example ensure that a given node property is always set or some
other properties are within a
Thanks, that is helpful!
2010/1/12 Mattias Persson matt...@neotechnology.com:
There's some classes I usually use (fits me, since I wrote them :) ).
They are in https://svn.neo4j.org/laboratory/users/mattias/neo-test-fw/
2010/1/12 Raul Raja Martinez raulr...@gmail.com:
Anybody care to share
I understand but imaging this case...
Model - Person encapsulates underlying node that access name property
Controller - Handler that receives http request requests a model has
transaction and delegates the model to a template to be rendered
View - Template that gets rendered with domain objects
AFAIK this behavior is specific to lucene as lucene indexes everything
as Strings following their natural order.
http://wiki.apache.org/lucene-java/SearchNumericalFields
2010/1/11 Zerony Zhao bw.li...@gmail.com:
Hi Neo4j users,
I am confused with LuceneFulltextQueryIndexService.
For integer,
Not that this solves your issue but...
1. If it is a webapp you can use a filter that wraps the request
around a transaction try catch finally... then your code would be
transaction free (mostly)
2. If you use a Spring service you can use @Transational or AOP
interceptors to annotate operations
Anybody care to share a strategy or base classes for unit testing
operations in the graph?
___
Neo mailing list
User@lists.neo4j.org
https://lists.neo4j.org/mailman/listinfo/user
, then the timeline index will do this for you. Otherwise there
is no ready made component for this today.
Happy hacking,
Tobias
On Mon, Jan 4, 2010 at 1:30 AM, Raul Raja Martinez raulr...@gmail.comwrote:
Hi,
Anybody has any experience returning indexed nodes ordered by a given
property?.
For example
-way combination
of k-dimensional indexes? I think I'm getting a headache just thinking about
it :-)
On Mon, Jan 4, 2010 at 10:17 AM, Raul Raja Martinez raulr...@gmail.comwrote:
Hi Tobias,
Thanks for the info!
I understand the implications of returning ordered nodes.
Do you guys plan
We personally use a facade/factory that allows us to interface to
neo4j and the Lucene indexes as if it was a single system.
This service is a singleton initialized with Spring with an init and
destroy method that properly starts/shutdown the store and index.
If it was up to me the index utils
, a combination that will give this
functionality.
Avishay
From: Raul Raja Martinez raulr...@gmail.com
To: Neo user discussions user@lists.neo4j.org
Sent: Sun, January 3, 2010 2:09:36 AM
Subject: Re: [Neo] Neo in a cluster?
In your framework, do all
Hi,
Anybody has any experience returning indexed nodes ordered by a given
property?.
For example return all nodes ordered by creationDate. I understand that if
the node property is not indexed I'd have to iterate over all nodes first
then order then limit the results which seems overkill to me.
Hi Anders,
We tried following the example but found that when used in a webapp the
whole request needs to be wrapped since neo4j requires transactions for
reads too.
We use some objects that lazily print properties in tapestry / jsp pages and
eventually we'd get errors since the call to read the
layer being
queried using JDOQL, SQL, or JPQL that could be used to gauge raw
performance of the query layer (filtering, sorting, aggregates, etc.).
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org]
On
Behalf Of Raul Raja Martinez
Sent: Friday
be
interesting in such a framework.
Avishay
From: Raul Raja Martinez raulr...@gmail.com
To: Neo user discussions user@lists.neo4j.org
Sent: Sat, January 2, 2010 2:09:09 AM
Subject: Re: [Neo] Neo in a cluster?
Hi Peter, Yes we looked at jo4neo and found it very interesting
://gremlin.tinkerpop.com- PageRank in 2 lines of code.
http://www.linkedprocess.org - Computing at LinkedData scale.
On Thu, Dec 31, 2009 at 10:53 PM, Raul Raja Martinez raulr...@gmail.com
wrote:
Hi Johan,
It does and we're very excited about Neo4j. Can't wait for your
clustering
I forgot to mention that if implementing JPA/JDO it'd provably good to do it
as a Datanucleus store for example
http://www.datanucleus.org/plugins/store.db4o/index.html
2010/1/1 Raul Raja Martinez raulr...@gmail.com
Hi Peter,
Yes we looked at jo4neo and found it very interesting
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