Datanode Related

GET

curl -v "http://10.196.59.198:17010/dataNode/get?addr=10.196.59.201:17310"  | python -m json.tool

Show the base information of the dataNode, such as addr, disk total size, disk used size and so on.

Parameters
Parameter	Type	Description
addr	string	the addr which communicate with master

response

{
    "TotalWeight": 39666212700160,
    "UsedWeight": 2438143586304,
    "AvailableSpace": 37228069113856,
    "ID": 2,
    "Zone": "zone1",
    "Addr": "10.196.59.201:17310",
    "ReportTime": "2018-12-06T10:56:38.881784447+08:00",
    "IsActive": true
    "UsageRatio": 0.06146650815226848,
    "SelectTimes": 5,
    "Carry": 1.0655859145960367,
    "DataPartitionReports": {},
    "DataPartitionCount": 21,
    "NodeSetID": 3,
    "PersistenceDataPartitions": {},
    "BadDisks": {}
}

Decommission

curl -v "http://10.196.59.198:17010/dataNode/decommission?addr=10.196.59.201:17310"

Remove the dataNode from cluster, data partitions which locate the dataNode will be migrate other available dataNode asynchronous.

Parameters
Parameter	Type	Description
addr	string	the addr which communicate with master

Get disk information

curl -v "http://192.168.0.11:17320/disks"

Get disk information, including disk path, space usage, disk status, etc.

Get data partition information

curl -v "http://192.168.0.11:17320/partitions"

Get data partition information, including partition ID, partition size and status, etc.

Offline Disk

curl -v "http://10.196.59.198:17010/disk/decommission?addr=10.196.59.201:17310&disk=/cfs1"

Synchronously offline all the data partitions on the disk, and create a new replica for each data partition in the cluster.

Parameters
Parameter	Type	Description
addr	string	replica address
disk	string	disk path
count	int	The number of data partitions to offline from disk，default(0) means all be offlined

Migrate

curl -v "http://10.196.59.198:17010/dataNode/migrate?srcAddr=src&targetAddr=dst&count=3"

Migrate the specified number of data partitions from the source data node to the target data node.

Parameters
Parameter	Type	Description
srcAddr	string	Source data node
targetAddr	string	Target data node
count	int	The number of data partitions to migrate，default(50)