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How can I determine the number of nodes I should deploy for an active active cluster of nodes? [closed]

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-1

I am looking at deploying a bunch of nodes all over the world that each replicate the exact same data.

These are all active-active and let's say the probability of a given node going down in given time period t is p.

How do I figure out then, the minimum number of nodes (n) I need to deploy, to achieve a global availability v, with these parameters t and p?

This may or may not be a math question but I am certain this is something someone has dealt with.

For example, with 99.99% ("four nines") availability, my network only is unavailable for a max of 52.60 minutes a year, which is 4.38 minutes per month, 1.01 minutes per week, or 8.64 seconds per day.

Thanks.

cluster

share|improve this question

edited Apr 18 at 1:39

Neeraj Murarka

asked Apr 18 at 1:10

Neeraj MurarkaNeeraj Murarka

1039

closed as too broad by joeqwerty, womble♦ Apr 18 at 12:18

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

add a comment | 

-1

I am looking at deploying a bunch of nodes all over the world that each replicate the exact same data.

These are all active-active and let's say the probability of a given node going down in given time period t is p.

How do I figure out then, the minimum number of nodes (n) I need to deploy, to achieve a global availability v, with these parameters t and p?

This may or may not be a math question but I am certain this is something someone has dealt with.

For example, with 99.99% ("four nines") availability, my network only is unavailable for a max of 52.60 minutes a year, which is 4.38 minutes per month, 1.01 minutes per week, or 8.64 seconds per day.

Thanks.

cluster

share|improve this question

edited Apr 18 at 1:39

Neeraj Murarka

asked Apr 18 at 1:10

Neeraj MurarkaNeeraj Murarka

1039

closed as too broad by joeqwerty, womble♦ Apr 18 at 12:18

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

add a comment | 

I am looking at deploying a bunch of nodes all over the world that each replicate the exact same data.

These are all active-active and let's say the probability of a given node going down in given time period t is p.

How do I figure out then, the minimum number of nodes (n) I need to deploy, to achieve a global availability v, with these parameters t and p?

This may or may not be a math question but I am certain this is something someone has dealt with.

For example, with 99.99% ("four nines") availability, my network only is unavailable for a max of 52.60 minutes a year, which is 4.38 minutes per month, 1.01 minutes per week, or 8.64 seconds per day.

Thanks.

cluster

share|improve this question

edited Apr 18 at 1:39

Neeraj Murarka

asked Apr 18 at 1:10

Neeraj MurarkaNeeraj Murarka

1039

share|improve this question

edited Apr 18 at 1:39

Neeraj Murarka

asked Apr 18 at 1:10

Neeraj MurarkaNeeraj Murarka

1039

share|improve this question

edited Apr 18 at 1:39

Neeraj Murarka

asked Apr 18 at 1:10

Neeraj MurarkaNeeraj Murarka

1039

asked Apr 18 at 1:10

Neeraj MurarkaNeeraj Murarka

1039

asked Apr 18 at 1:10

Neeraj MurarkaNeeraj Murarka

1039

1 Answer
1

active

oldest

votes

1

There's no exact answer - but you should at least read up on CAP theorem to design your network so it can handle a global scale fault. I'd hazard to guess that if you are asking this question, it would be best to keep the architecture simple and local to a given region to minimize latency impact.

Keep in mind that stateful geo-distribution is incredibly complex - there's a reason why many major sites (Reddit, Imgur, etc.) are single core location only. It took us many years of planning and execution for us to activate Speedtest.net in Active/Active mode globally.

share|improve this answer

answered Apr 18 at 3:16

Brennen SmithBrennen Smith

1,315311

add a comment | 

1

There's no exact answer - but you should at least read up on CAP theorem to design your network so it can handle a global scale fault. I'd hazard to guess that if you are asking this question, it would be best to keep the architecture simple and local to a given region to minimize latency impact.

Keep in mind that stateful geo-distribution is incredibly complex - there's a reason why many major sites (Reddit, Imgur, etc.) are single core location only. It took us many years of planning and execution for us to activate Speedtest.net in Active/Active mode globally.

share|improve this answer

answered Apr 18 at 3:16

Brennen SmithBrennen Smith

1,315311

add a comment | 

1

There's no exact answer - but you should at least read up on CAP theorem to design your network so it can handle a global scale fault. I'd hazard to guess that if you are asking this question, it would be best to keep the architecture simple and local to a given region to minimize latency impact.

Keep in mind that stateful geo-distribution is incredibly complex - there's a reason why many major sites (Reddit, Imgur, etc.) are single core location only. It took us many years of planning and execution for us to activate Speedtest.net in Active/Active mode globally.

share|improve this answer

answered Apr 18 at 3:16

Brennen SmithBrennen Smith

1,315311

add a comment | 

There's no exact answer - but you should at least read up on CAP theorem to design your network so it can handle a global scale fault. I'd hazard to guess that if you are asking this question, it would be best to keep the architecture simple and local to a given region to minimize latency impact.

Keep in mind that stateful geo-distribution is incredibly complex - there's a reason why many major sites (Reddit, Imgur, etc.) are single core location only. It took us many years of planning and execution for us to activate Speedtest.net in Active/Active mode globally.

share|improve this answer

answered Apr 18 at 3:16

Brennen SmithBrennen Smith

1,315311

share|improve this answer

answered Apr 18 at 3:16

Brennen SmithBrennen Smith

1,315311

answered Apr 18 at 3:16

Brennen SmithBrennen Smith

1,315311

answered Apr 18 at 3:16

Brennen SmithBrennen Smith

1,315311