Meta Partition

Create

curl -v "http://10.196.59.198:17010/metaPartition/create?name=test&start=10000"

Split meta partition manually. If max meta partition of the vol which range is [begin,end):

if start larger than begin and less than end parameter, old meta partition range will be [begin,start], new meta partition will be [start+1,end);

if start less than begin, max is the biggest inode num in current mp, old meta partition range will be [begin,max+16777216], new meta partition will be [max+16777217,inf);

if start bigger than end, old meta partition range will be [begin,start], new meta partition will be [start+1,inf); so, if start is too big, that will cause inode count in one partition too many, which will cost large memory.

when inode count is too big on the last meta partition, it will trigger partition range split automatically

Parameters
Parameter	Type	Description
name	string	the name of vol
start	uint64	the start value of meta partition which will be create

Get

curl -v "http://10.196.59.198:17010/metaPartition/get?id=1" | python -m json.tool

Show base information of meta partition, such as id, start, end and so on.

Parameters
Parameter	Type	Description
id	uint64	the id of meta partition

response

{
    "PartitionID": 1,
    "Start": 0,
    "End": 9223372036854776000,
    "MaxNodeID": 1,
    "VolName": "test",
    "Replicas": {},
    "ReplicaNum": 3,
    "Status": 2,
    "IsRecover": true,
    "Hosts": {},
    "Peers": {},
    "Zones": {},
    "MissNodes": {},
    "LoadResponse": {}
}

Decommission

curl -v "http://10.196.59.198:17010/metaPartition/decommission?id=13&addr=10.196.59.202:17210"

Remove the replica of meta partition, and create new replica asynchronous.

Parameters
Parameter	Type	Description
id	uint64	the id of meta partition
addr	string	the addr of replica which will be decommission

Load

curl -v "http://10.196.59.198:17010/metaPartition/load?id=1"

Send load task to the metaNode which meta partition locate on, then check the crc of each replica in the meta partition.

Parameters
Parameter	Type	Description
id	uint64	the id of data partition