Overview:   [VC] Store first 1000 items with 10 threads

Platform:   offline
Modlue:     VeryCD Mirror
Description:Now the VeryCD Mirror Program can store first 1000 items with 10 threads
TODO:
            1.Check each 10 threads insert result. Reinsert for the missed ones
            2.Get input the range of items
            3.Topic support.
            4.Command support.