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From Tom Hobbs <tvho...@googlemail.com>
Subject Re: datastructure classes
Date Thu, 16 Dec 2010 16:27:49 GMT
I've taken the liberty of creating a new Jira for the refactoring of
FastList in the Outrigger internals.


Sorry is that's presumptuous or if the wording of ticket is wrong.  I
thought it'd be good to start getting something a bit more structured
down.  Particularly if we can get the details of the kinds of numbers
that Mike is talking about.

Personally, I think that Mike's (and others) comments are exactly what
this dev community needs to see.  Any implementation decision we make
(particular when refactoring existing functionality) needs to have (at
least) an eye on the needs of our users.

On Thu, Dec 16, 2010 at 4:01 PM, Patricia Shanahan <pats@acm.org> wrote:
> Mike McGrady wrote:
>> Intense network systems like our clients cannot work with database
>> calls.  They are too slow and do not scale.  They either reach a cost
>> or a performance ceiling.
> I feel we are mixing requirements and implementation. Response time,
> throughput, ACID properties and the like are requirements. What Outrigger
> uses as persistent storage for tuple space is implementation.
> I would like to get more data on your performance requirements - specifics
> about e.g. x% of JavaSpace reads under these conditions must complete within
> y seconds.
> The most useful and specific way of presenting requirements would be a
> scalable benchmark - something where we can simulate a larger number of
> machines doing real work by having a smaller number dedicated to driving
> transactions at a single JavaSpace and measuring the results.
> Measurements from a small to medium sized environment would be useful input
> for estimating performance at higher loads. Without that sort of data, I
> cannot even guess whether an achievable Outrigger implementation will be
> able to meet all your requirements.
> Patricia

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