[Neo4j] 10 questions
tali.wang at gmail.com
Thu Sep 1 03:29:00 CEST 2011
got some questions not found simple answers from the documents. i bet
some of them are pretty primitive, bear with me please.
1, what's the general rule for choosing properties or relationship?
say a User lives in a City, which just contains a simple int id
value. to find users live in a city, i can do a simple traversal, of
all user nodes, or find the city node first, then collect all the
users. seems to me both ways work and share same level of performance.
(am i right here?)
2, does index operation add/remove/modify threadsafe, don't need
3, does it simple property writing operations also need to be wrapped
inside transaction? if so, in the imdb exmaple
tutor/domain/MovieImpl.java underlyingNode.setProperty is used neither
within transaction, nor put into a save method, do all setProperty
works inside a transaction?
4, what's the best practice to do bulk insertion when running (not
seed initial data)? i read post says that too many insertions within a
transaction may lead to memory problem? what's the proper mount of
insertion within a transaction?
5, is there a suggested max length for string/array property? would it
be better to put into sql?
6, say a facebook user may "likes" thousands of things, and these
things are sparsly connected. in this case, things should be modeled
as nodes or array property?
7, where can i find an example to use domain models with serverplugin?
i want to put my data in a standalone server and just use the
serverplugin, unmanaged extension. should i just put the domain models
into the same serverplugin jar?
8, the warning in the documentation about unmanaged extension is
scary. what i can see is that people may use bad ways, instead of
Iterator/IteratorWrappers. any comment on this?
9, i'm not sure if it's trival: find out users who are only 2
relationships a way (use twitter example: my followees' followers),
live in same city, group by age and gender. also retrieve all their
followees. i want to do the traversal in java, where can i find an
10, i've had horrible experience in turning jvm options. have neo4j
been running on Zing JVM, hp nonstop jvm? are they better options?
thanks in advance
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