Hi, It will be incorrect, because entries are not stored sequentially, there are a lot of infrastructure that requires additional space. For example, memory is divided into pages and each page has header, each entry has key and value, version and other service information. For quick access to entries is created b+tree (which consists of pages too), synchronization primitives, links and binary object overhead to allow access to it's fields.
It's quire hard to say how much memory will be required, just approximately [1]. The best way will be to load some number of data and measure how much memory was consumed. You need to make many such measures, because only on large number of entries memory consumption will increase linearly. [1] https://apacheignite.readme.io/docs/capacity-planning Thanks! -Dmitry -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
