First thanks to all of you for the hints and the detailed explanation of
Craig. Peter I was not into any code in detail yet, but I have had a look on
the (beta) wiki of Neo4j spatial.
Some more questions on the storage format of Neo4j: So the nodes, properties
and relationships are stored in seper
Lots of thoughts,
I just want to add a side note on store "defragmentation".
Mattias and I wrote a little tool for a customer who was in need of recreation
of his
store with some properties/relationships omitted but using the original
node-ids.
We did that by iterating through the existing sto
I think Daniels questions are very relevant, but not just to OSM. Any large
graph (of which OSM is simply a good example) will be affected by
fragmentation, and that can affect performance. I recently was hit by
performance of GIS queries (not OSM) related to fragmentation of the index
tree. I will
Daniel,
for OSM data and GIS, have you looked at
https://github.com/neo4j/spatial, especially the OSM examples at
https://github.com/neo4j/spatial/blob/master/src/test/java/org/neo4j/gis/spatial/pipes/GeoPipesTest.java
and
https://github.com/neo4j/spatial/blob/master/src/test/java/org/neo4j/gis/sp
Hello Chris,
thanks for your postings, they are a great starting point for me to assume a
good performance of this database. However I have some questions left.
Lets say I have a node store and a property store. Both of them are
individual files. I am going to implement a GIS application which fet
>
There is no shame in producing good work and sharing it with others.
Marko.
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Hi,
You can find a decent explanation for pre-1.4 storage layout here:
http://digitalstain.blogspot.com/2010/10/neo4j-internals-file-storage.html
It has not been updated however to explain extended addressing for 4B+
entities in a db (which do not change the layout, just the semantics
of some b
Hello everybody,
I have some questions regarding data storage in neo4j. How does neo4j store
the data on the physical level? Are elements which have a close relationship
in the graph stored in an adjacent way on disk? Any special binary format?
How do you treat SSDs compared to common harddisks? W
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