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datanode.rst

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Datanode Related

GET

curl -v "http://127.0.0.1/dataNode/get?addr=127.0.0.1:5000"  | 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

{
    "MaxDiskAvailWeight": 3708923232256,
    "CreatedVolWeights": 2705829396480,
    "RemainWeightsForCreateVol": 36960383303680,
    "TotalWeight": 39666212700160,
    "UsedWeight": 2438143586304,
    "Available": 37228069113856,
    "Cell": "default",
    "Addr": "10.196.30.231:6000",
    "ReportTime": "2018-12-06T10:56:38.881784447+08:00",
    "Ratio": 0.06146650815226848,
    "SelectCount": 5,
    "Carry": 1.0655859145960367,
    "Sender": {
        "TaskMap": {}
    },
    "DataPartitionCount": 21
}

Decommission

curl -v "http://127.0.0.1/dataNode/decommission?addr=127.0.0.1:5000"

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