When doing some large traversal testing (no writes/updates), I noticed that
the neostore.propertystore.db.strings file was seeing a lot of read I/O (as
expected) but also a huge amount of write I/O (almost 5X the read I/O rate).
Out of curiosity, what is the write activity that needs to occur when
FYI, we experimented with different heap size (1GB), along with different
"chunk sizes", and were able to eliminate the heap error and get about a 10X
improvement in insert speed. It would be helpful to better understand the
interactions of the various Neo startup parameters, transaction buffers,
Hi, all.
When trying to load a few hundred thousand nodes & relationships (chunking
it in groups of 1000 nodes or so), we are getting an out of memory heap
error after 15-20 minutes or so. No big deal, we expanded the heap settings
for the JVM. But then we also noticed that the nioneo_logical
Hi, all.
Here are a few questions and comments that I'd welcome feedback on :
Questions:
- If you delete the reference node (id = 0), how can you recreate
it?
- If you have a number of "loose" or disjoint graphs structured as
trees with a single root node, is there a
Hi,
Lots of questions :)
1. This iterator will just prevent duplicates from being returned from
the iterator? If there's a condition (bug in my code) that causes
shutdown w/ open transactions, will the Lucene indexes continue to
double until they're huge?
2. Would it be possible to detect this s
Hi, Tobias.
Actually, I think we'll use your approach for the "known relationships" and
"known types" (there are quite a few in our domain model) in addition to the
dynamic approach.
Thanks for the help!
Rick
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lis
Hi Adam,
We're aware of such problems and I just now committed a fix which
basically is a cover-up until those bugs are fixed... the iterable
from getNodes() now runs through a filter (lazily before each next())
so your problem should go away.
2009/12/8 Adam Rabung :
> Hi,
> I've recently run int
I see. I realized that this was what you were after. What I was proposing
was that you would know the types for the properties given the type of the
node. The types for the nodes in your case would be more abstract, perhaps
just defined by the set of properties. I used concrete types in my
explanat
Hi, Tobias.
Thanks for your thoughts and ideas.
My requirement is not only to know the "type" of something, but also to
store metadata for "types" so that I can catalog the "property type" of
each individual property in a node for a given "type". It's a bit
complicated, but
Associating nodes with a type node is a good approach, especially if you
want to be able to do queries like "give me all nodes of type X". But for
knowing the semantic type of a node when found through a general traversal I
prefer to use the navigational context of the node. For example if I have a
Hi Mattias,
I have already done it 10 minutes ago. If you need an example to see the
format of the 4 csv files, I can send it to you.
Thanks again,
Núria.
2009/12/9 Mattias Persson
> Oh ok, It could be our attachments filter / security or something...
> could you try to mail them to me directl
Oh ok, It could be our attachments filter / security or something...
could you try to mail them to me directly at matt...@neotechnology.com
?
2009/12/9 Núria Trench :
> Hi Mattias,
>
> In my last e-mail I have attached the sample code, haven't you received it?
> I will try to attach it again.
>
>
Hi Mattias,
In my last e-mail I have attached the sample code, haven't you received it?
I will try to attach it again.
Núria.
2009/12/9 Mattias Persson
> Hi again, Núria (it was I, Mattias who asked for the sample code).
> Well... the fact that you parse 4 csv files doesn't really help me
> se
Hi again, Núria (it was I, Mattias who asked for the sample code).
Well... the fact that you parse 4 csv files doesn't really help me
setup a test for this... I mean how can I know that my test will be
similar to yours? Would it be ok to attach your code/csv files as
well?
/ Mattias
2009/12/9 Núr
Hi Todd,
The sample code creates nodes and relationships by parsing 4 csv files.
Thank you for trying to trigger this behaviour with this sample.
Núria
2009/12/9 Mattias Persson
> Could you provide me with some sample code which can trigger this
> behaviour with the latest index-util-0.9-SNAPS
Could you provide me with some sample code which can trigger this
behaviour with the latest index-util-0.9-SNAPSHOT Núria?
2009/12/9 Núria Trench :
> Todd,
>
> I haven't the same problem. In my case, after indexing all the
> attributes/properties of each node, the application creates all the edges
Todd,
I haven't the same problem. In my case, after indexing all the
attributes/properties of each node, the application creates all the edges by
looking up the tail node and the head node. So, it calls the method
"org.neo4j.util.index.
LuceneIndexBatchInserterImpl.getSingleNode" which returns -1
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