GiantKing

https://github.com/apache/incubator-pegasus/issues/845 Adapt to the modification in rdsn(https://github.com/XiaoMi/rdsn/pull/1014), add a new command to Pegasus shell: "unlock_meta_op_status"

As we promote BulkLoad feature to our business, downloading files will cause a lot of negative effects on our service. I will ues direct I/O as writing files to disk,...

## Feature Request There are some time-consuming operations in Pegasus: recall, balance, backup, bulk load, restore, manual compact, partition split It will have an impact on online service while it...

https://github.com/apache/incubator-pegasus/issues/845 Add a command to unlock meta_op_status manually. And show meta_op_status in Pegasus shell : "cluster_info".