SORT key [BY pattern] [LIMIT offset count] [GET pattern [GET pattern ...]] [ASC|DESC] [ALPHA] [STORE destination] 
 SORT mylisturl by url-*->pv desc get # get pv-* get url-*->rank 
string
pv-Google.com
19.60
pv-Facebook.com
11.62
pv-Baidu.com
8.87
pv-Yahoo.com
7.44
pv-Youtube.com
4.58
myurl(set)
Google.com
Facebook.com
Baidu.com
Yahoo.com
Youtube.com
hash
url-Google.com
pv
 19.60
 rank
 1
 url-Facebook.com
pv
    11.62
rank
 2
 url-Baidu.com
pv
   8.87
rank
5
url-Yahoo.com
pv
   7.44
rank
 4
url-Youtube.com
pv
   4.58
rank
 3
get pv-*
get #
by url-*->pv
url-*->rank