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From sunww <spe...@outlook.com>
Subject about parallel query
Date Tue, 12 Aug 2014 09:13:22 GMT
Hi,I note phoenix can runs queries in parallel automatically.But I don't understand    this
formula:
-------------------------------t is the target concurrencym is the max concurrencyr is the
number of regions we need to scan
if r >= t    scan using regional boundaries else if r/2 > t    split each region in
s splits such that: s = max(x) where s * x < m else    split each region in s splits such
that:  s = max(x) where s * x < t -------------------------------
if there is only one regions to scan and target concurrency态max concurrency  are default
value.how many parallelization  can be excute
Thanks 		 	   		  
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