Redis add Transaction

1、Reids对list类型的数据增加去重处理
2、增加tch存储hash结构数据
3、读取新的List数据，分离key和value
cancel sets

hold the zsets
add replace method of tch

Synopsis

require('Memcached')
memcache = Memcached.Connect('some.host.com', 11000)
memcache:set('some_key', 1234)
memcache:add('new_key', 'add new value')
memcache:replace('existing_key', 'replace old value')
cached_data = memcache:get('some_key')
memcache:delete('old_key')
combinate the flt and psg
dip read from the slave redis server