Alex P., Vladimir,

Having CREATE INDEX command we can define indexes in runtime. However, it’s 
unclear how a new index is built.

Let’s imagine I have a field “name” that was in Person’s model for a while and 
there are millions of such objects in the cluster. Now I turned the field into 
the index in runtime. How Ignite is going to built the index? Do we iterate 
over the millions of objects with the field in background or at the time of the 
CREATE INDEX execution blocking the latter? Or is there more sophisticated 
process?

—
Denis 

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