Hi,
p.s. I always find the following article helpful when thinking about
dependency issues:
@inproceedings{803218,
author = {David L. Parnas},
title = {Designing software for ease of extension and contraction},
booktitle = {ICSE '78: Proceedings of the 3rd international conference
on Software engineering},
year = {1978},
isbn = {none},
pages = {264--277},
location = {Atlanta, Georgia, United States},
publisher = {IEEE Press},
address = {Piscataway, NJ, USA},
}
you can find the full-text version at various places on the net.
J "ohhh no" T
Fotis Georgatos wrote:
> Dear all,
>
> I am trying to find a way to describe the different aspects
> of interconnection among various grid components of the gLite stack.
>
> For this reason I have made an attempt to create a Dependability Matrix,
> which albeit preliminary includes some factual aspects of the system,
> or at least tries to present a probable draft picture of it,
> assuming four base services (IP=network service, DNS, NTP, BDII):
>
> IP DNS NTP BDII GSI RB LFC UI SE WN CE FTS/FPS
> Depends on:
> IP - X X X X X X X X X X X
> DNS - X X X X X X X X X X
> NTP - X
> BDII - X ? X X X X
>
> GSI - X X X X X X X
> RB - X
> LFC - X X
> UI -
> SE X -
> WN - X
> CE X X -
> FTS/FPS -
>
> First, let me readily recognize that the matrix is perhaps incomplete,
> if not at cases misleading :) (eg. WN can be as complex as UI)
> Also, I have deliberately omitted services like VOMS, CA, MYPROXY,
> although I am interested in them and intend to include them later on.
>
> Here is my question now:
>
> Is there any definite guide which could help us in finding out
> the exact dependencies of all the middleware components, reliably?
> Maybe there is something wrong up in that matrix, but who is to tell?
>
> I know the ETICS project is doing a mapping of software components
> and their dependencies, as seen in a single system installation,
> but in this case I'm looking for the whole distributed system's relations!
>
> btw.
> If anybody is doing some related work, or any following keyword rings a
> bell:
> PRA, FTA, FME(C)A, ETA, ESD, HRA, MLD, CCF and friends.... please
> contact me!
>
> ps. - ref.
> Probabilistic Risk Assessment Procedures Guide for
> NASA managers and Practitioners, Dr. Michael Stamatelatos, August 2002
>
> thank you in advance,
> and enjoy your vacation for the ones still on the go :),
>
> Fotis
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