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  • Decisões arquiteturais existenciais (e não-existenciais);
  • Decisões arquiteturais de propriedades; e
  • Decisões arquiteturais executivas.

Decisões existenciais

Uma decisão existencial é aquela que indica a presença de umou vários elementos arquiteturais no design e na implementação.

Os elementos arquiteturais já foram apresentados anteriormente,mas vamos relembrá-los aqui. Estes elementos são as partes em que o softwareé dividido e podem ser classificadosem dois tipos: elementos arquiteturais estáticos e elementos arquiteturaisdinâmicos. Os elementos estáticos descrevem a estrutura do sistema em tempo dedesign e são constituídos de elementos de software (por exemplo, classes,pacotes, procedimentos, serviços remotos), elementos de dados (por exemplo, entidadese tabelas de bancos de dados, arquivos ou classes de dados), e elementos dehardware (por exemplo, servidores em que o sistema vai executar ou armazenardados). Por sua vez, os elementos dinâmicos descrevem o comportamento do sistemaem tempo de execução e entre eles podemos incluir processos, módulos, protocolos,ou classes que realizam comportamento. Note que as relações entre os elementosarquiteturais, tanto estáticos quanto dinâmicos, são representadas tambémcomo elementos arquiteturais. Estes elementos são chamados de conectorese podem ser associações, composições, generalizações, entre outros.

No [link] , observamos uma decisão arquitetural que divideo SASF em diversos módulos menores, constituindo assim uma decisão existencialque define diversos elementos e as relações entre si.

Já no [link] , observamos uma decisão arquitetural que tambémdita a presença de elementos na arquitetura do SASF. No entanto, ao contrário doexemplo citado anteriormente que dita elementos estruturais do software,o [link] dita elementos comportamentais esperados nele. Assim,podemos encontrar decisões existenciais que sejam decisões estruturais ou comportamentais.As decisões comportamentais são mais relacionadas à implementação dos requisitosde qualidade.

[Decisão Arquitetural 005]Os dados do Cadastro de Usuários e do Cadastro de Filmes devem ser particionados horizontalmente.

Objetivo : Distribuir carga, melhorar o desempenhoe aumentar o número de pontos de falhas.

Motivação : Ao particionar horizontalmenteos dados, permite-se a distribuição da carga de requisições entre váriosservidores de armazenamento, que estarão executando instâncias doSGBDR. Com menor carga, o desempenho pode ser melhorado. Além disso,caso uma partição fique inacessível (por falha, por exemplo), partedos dados ainda estarão acessíveis, não inviabilizando o sistema porcompleto.

Questions & Answers

how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Arquitetura de software. OpenStax CNX. Jan 05, 2010 Download for free at http://cnx.org/content/col10722/1.9
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