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From Denis Magda <dma...@apache.org>
Subject Re: Sizing in Ignite
Date Wed, 10 May 2017 22:59:11 GMT

Honestly, it’s unclear why you use multipliers like 2.5 and 1.3 in the formula. 

Please refer to this capacity guide to make up a rough estimation:
https://apacheignite.readme.io/docs/capacity-planning <https://apacheignite.readme.io/docs/capacity-planning>


> On May 10, 2017, at 8:35 AM, Guillermo Ortiz <konstt2000@gmail.com> wrote:
> What's the reason because it needs so many space Ignite to store data in memory?. 
> For example, if your dataset it's about 4TB and you are going to use backup (1 replica)
the final size it's about
> 5TBx2.5x1.3(indices) x backcup = 26TB more or less... So, it could be 28TB with the memory
of the system to work. 
> It seems insane to have that memory in many cases. How does Ignite store data to spend
3 times the size on disk? is it possible to reduce this?

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