Which value should you use with each configuration?

DRAG DROP
You administer a cloud service named contosoapp that has a web role and worker role.
Contosoapp requires you to perform an in-place upgrade to the service.
You need to ensure that at least six worker role instances and eight web role instances are
available when you apply upgrades to the service. You also need to ensure that updates are
completed for all instances by using the least amount of time.
Which value should you use with each configuration? To answer, drag the appropriate value
to the correct configuration. Each value may be used once, more than once, or not at all.
You may need to drag the split bar between panes or scroll to view content.

DRAG DROP
You administer a cloud service named contosoapp that has a web role and worker role.
Contosoapp requires you to perform an in-place upgrade to the service.
You need to ensure that at least six worker role instances and eight web role instances are
available when you apply upgrades to the service. You also need to ensure that updates are
completed for all instances by using the least amount of time.
Which value should you use with each configuration? To answer, drag the appropriate value
to the correct configuration. Each value may be used once, more than once, or not at all.
You may need to drag the split bar between panes or scroll to view content.

Answer:

Explanation:



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TTTfreeTTT

TTTfreeTTT

Could some one explain me how can we obtain these values ? (12, 9 , 3)
Knowing that the upgrade domains last from 5 (default) to 20 ?
Thank you in advance.

Dmitriy

Dmitriy

It’s because the question say “using the least amount of time”. So knowing that you need to modify the quantity of upgrade domain used. If you do the math, with three upgrade domains you are good!

David

David

Can someone explain where these numbers are comming from?

Sean

Sean

I don’t understand the answer to this question at all.

Rolla

Rolla

3 upgrade domains = 4 Web role instances each total = 12, 4 down while upgrading, 8 running as per the requirement, then the next 4 are upgraded and then the next 4

3 upgrade domains = 3 Worker role instances each total = 9, 3 down while upgrading, 6 running as per the requirement

Romil

Romil

thanks a lot

quiet

quiet

Finally figure out the number:
update domain 1: 4 web role and 3 work role
update domain 2: 4 web role and 3 work role
update domain 3: 4 web role and 3 work role
total: 3 update domain, 3*4 web role and 3*3 work role

only need to run update 3 times for each domain

Mohamed Ghaleb

Mohamed Ghaleb

Its complicated question, but check this link: https://blogs.msdn.microsoft.com/plankytronixx/2015/05/01/azure-exam-prep-fault-domains-and-update-domains/

Its really prefect.

in Short, think about update domains like “please update one update domain at a time” so if you have 3 update domains (0,1,2) you will update 0 then 1 then 2.

Now, let’s say you have 12 instances and a Max number of 3 update domains, Azure will distribute them as below:
Instance Nr. 1 – UD0
Instance Nr. 2 – UD1
Instance Nr. 3 – UD2
Instance Nr. 4 – UD0
Instance Nr. 5 – UD1
Instance Nr. 6 – UD2
Instance Nr. 7 – UD0


and so on.

Now 12 instances and 3 update domains, how many instances will be update in the same time? in other words how many Instances will take UD0 ? (Update Domain Zero) ?? in 12 instances 4 will take UD0 so 4 will be updated in the same time leaving 8 instances online during the upgrade.

9 instances and 3 update domain, same logic will leave you with 6 instances always online during the update.

Got the point?

Mohamed

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mrcoffee2020

mrcoffee2020

Hi, i think that answer is 9 instances for web role, 7 instances for worker role and 6 domain upgrades because the default domain upgrades is 5 and azure manage and distribute uniformly the instances in the domain upgrades .So to get the minimum necessary to meet the requirement is this configuration.

Jeff

Jeff

I get all this: my only question why cant we do this:
UD0 has 6 Worker roles and 8 Web
UD1 has 6 worker roles and 8 WeB

6 down while 6 up
8 down while 8 up
and 2 UDS?
Just curious…