[Neo4j] SDN w/ write and readonly Graph Database Service?

Rick Bullotta rick.bullotta at thingworx.com
Tue Nov 1 17:50:18 CET 2011


Cool.  If you can control access to the data (e.g. no access until the entire subgraph/dataset has been imported) you can probably avoid a lot of the concurrency issues.

-----Original Message-----
From: user-bounces at lists.neo4j.org [mailto:user-bounces at lists.neo4j.org] On Behalf Of Tero Paananen
Sent: Tuesday, November 01, 2011 12:49 PM
To: Neo4j user discussions
Subject: Re: [Neo4j] SDN w/ write and readonly Graph Database Service?

On Tue, Nov 1, 2011 at 12:26 PM, Rick Bullotta
<rick.bullotta at thingworx.com> wrote:
> Probably the opposite (if you could even do it).  You'd lose the LRU caching across
> the boundary.
>
> Is the data being written the same as the data being read, or is there a natural
> segmentation?  If so you could implement a crude form of sharding/partioning
> to avoid "hot spots" (concurrency related) during these periods.

It's largely going to be the same data. It's definitely the same type of data.

Basically there will be discreet sets of same type of data (kinda like
sub-graphs,
but they can be connected) inserted in a batch-like manner. Those discreet sets
of data will then immediately be consumed by processes that use it to calculate
additional data and store the results to various data stores, incl.
the same Neo4J
db. After the initial consumption, the data sets will be consumed on-demand, but
I'm not sure about how frequently at this point. It'll likely be
something like once
or twice a day or even less frequently, but I'll have to see how the
usage patterns
emerge after the solution goes live to be sure.

Thanks for the answer Rick. I'll do some quick-and-dirty testing later this week
to guide the decision making on this. I'll see if I can post what I find on this
thread afterwards.

-TPP
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