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I have very large log(50T per day),

My log event as follows

url,visitid,requesttime

http://www.aaa.com?a=b&c=d&e=f, 1, 1463387380
http://www.aaa.com?a=b&c=d&e=fa, 1, 1463387280
http://www.aaa.com?a=b&c=d&e=fa, 2, 1463387280
http://www.aaa.com?a=b&c=d&e=fab, 2, 1463387280
http://www.aaa.com?a=b&c=d&e=f, 1, 1463387380


When a user enters a part of the url, and returns the
uv(UniqueVisitor) pv(PageView)。

for example

input: e=f*

output: uv=2,pv=5,

input: e=fa

output:uv=2,pv=3

How to design rowkey?

Thanks.