Re: [Myexperiment-discuss] Re: Web service metrics: interface granularity and service composition

[Antoon Goderis]

Hi Michael,

This may be something :

On the Definition of Service Granularity and Its Architectural Impact
http://dx.doi.org/10.1007/978-3-540-69534-9_29

I'm on Raf's thesis defense committee ; if you want more info let me know.

Wrt getting data on service granularity, I know this guy :

http://www.win.ua.ac.be/~jvgeet/

is running experiments using traffic data between +/- 1000 components of
the mainframe of a large bank. I don't know if you need your services to
be autonomous and heterogeneous...

Groetjes,

Antoon

On Fri, 17 Jul 2009, Michael Parkin wrote:

> Thanks Duncan.
>
> Had a quick scan of the paper you linked to. It seems the traffic
> light system is concerned with the health of the deployed service.
> Apologies, perhaps I wasn't too clear about what I'm looking for, by
> granularity I meant two things:
>
> * Granularity of a service interface (or the 'size' of a service
> interface). Aka how many operations/portTypes/interfaces/etc. in each
> interface.
>
> * Granularity of a service operation (the 'size' of a particular
> operation). A service operation can perform a single function or more
> than one function. Singular operations can be, for instance,
> primitives like CRUD while composite operations combine other service
> operations.
>
> Our research is concerned with finding the appropriate granularity for
> a service interface and each operations when designing or refactoring
> a service, according to some criteria like reusability, value,
> maintainability, reliability, etc.
>
> Initially we're attempting to find some data - such as number of
> operations per service interface - from existing service interfaces to
> find some real-world data on the first aspect of granularity. Hence
> our interest in the Biocatalogue, myExperiment and others, such as
> EMBRACE and seekda.
>
> Thanks again,
>
> Michael.
>
> p.s. I used 'composition' a bit too loosely in the last email - I
> meant the composition of the service interface wrt operations, not
> compositions of services :).
>
> On 16 Jul 2009, at 14:23, Duncan Hull wrote:
>
> > Hi Michael
> >
> > Good to hear from you.
> >
> > On 16 Jul 2009, at 12:33, Michael Parkin wrote:
> >
> >> Hope you are well and (still) enjoying life in Manchester. Looking
> >> forward to the new season without Ronaldo but with Michael Owen? ;)
> >
> > Good riddance ronaldo! And Tevez has switched from red to blue... so
> > we won't be saying goodbye just yet.
> >
> >>
> >> Enough football though: I've a question about the EBI's
> >> Biocatalogue and don't know where to start. I'm hoping you can help
> >> as you're familiar with the community.
> >>
> >> As part of my work here I'm looking into metrics of services, like
> >> the interface granularity and composition, since there is little
> >> published data about this. I'd like to ask the EBI/UoM if they have
> >> this (or any other useful) data on the service descriptions they
> >> host, or if they could generate it from their repository. (ok, I
> >> could go through all the interfaces myself and get the data, but
> >> really don't fancy it.)
> >
> >
> > Not sure what you mean by granularity.... but there are metrics on
> > use (green, amber and red) some of which are described in this
> > paper: http://dx.doi.org/10.1093/bioinformatics/btp329
> >
> >>
> >> I see that most entries in the bio-catalogue just contain links to
> >> the WSDL, API docs, etc. so it may be that they don't have this
> >> information (it would be interesting to find out what the EBI
> >> stores about these services).
> >>
> >> So, my question is really simple: who should I contact?
> >
> > I've cc'ed this message into myExperiment and biocatalogue mailing
> > lists who should be able to provide more info.
> >
> >
> >>
> >> Supplementary: does myExperiment collect similar data? I understand
> >> they have a more involved curation process and look at the services
> >> in more detail.
> >
> >
> > Yes, AFAIK myExperiment keeps a record of which services have been
> > used together - someone from the myexperiment team could probably
> > supply more details if you are interested.
> >
> > Hope this helps.
> >
> > Duncan
> >
> > ---
> > http://duncan.hull.name
> >
> >
>
>
>
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