Metanode Related

GET

curl -v "http://10.196.59.198:17010/metaNode/get?addr=10.196.59.202:17210"  | python -m json.tool

Show the base information of the metaNode, such as addr, total memory, used memory and so on.

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

response

{
    "ID": 3,
    "Addr": "10.196.59.202:17210",
    "IsActive": true,
    "Zone": "zone1",
    "MaxMemAvailWeight": 66556215048,
    "TotalWeight": 67132641280,
    "UsedWeight": 576426232,
    "Ratio": 0.008586377967698518,
    "SelectCount": 0,
    "Carry": 0.6645600532184904,
    "Threshold": 0.75,
    "ReportTime": "2018-12-05T17:26:28.29309577+08:00",
    "MetaPartitionCount": 1,
    "NodeSetID": 2,
    "PersistenceMetaPartitions": {}
}

Decommission

curl -v "http://127.0.0.1/metaNode/decommission?addr=127.0.0.1:9021"

Remove the metaNode from cluster, meta partitions which locate the metaNode will be migrate other available metaNode asynchronous.

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

Threshold

curl -v "http://127.0.0.1/threshold/set?threshold=0.75"

If the used memory percent arrives the threshold, the status of the meta partitions which locate the metaNode will be read only.

Parameters
Parameter	Type	Description
threshold	float64	the max percent of memory which metaNode can use

Migrate

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

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

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