This feature can help to reduce the data transferred about 60%, and the migration time can also be reduced about 70%.
Summary of changed from v3->v4 -Update the test data in the document -Fix some typo errors -Use compressBound instead of MACRO define -Optimize the performance when compression co-work with XBZRLE -Added some comments -Rename some functions and variables -Incorrect coding style fix -QMP type change for compatibility -- 1.9.1