Metadata Shard Management
Create
curl -v "http://10.196.59.198:17010/metaPartition/create?name=test&start=10000"
Manually splits the metadata shard. If the maximum metadata shard inode range of the volume is [begin, end):
- If start is greater than begin and less than end, the inode range of the original maximum metadata shard becomes
[begin, start], and the range of the newly created metadata shard is[start+1,+inf). - If start is less than begin, max is the maximum inode number on the current shard, and the inode range becomes
[begin, max+16777216], and the range of the newly created metadata shard is[max+16777217,+inf). - If start is greater than end, max is the maximum inode number on the current shard, and the inode range becomes
[begin, start], and the range of the newly created metadata shard is[start+1, +inf).
Note
A large start value will cause a large inode on a single shard, occupying a large amount of memory. When there are too many inodes on the last shard, automatic splitting of the metadata partition will also be triggered.
Parameter List
| Parameter | Type | Description |
|---|---|---|
| name | string | Volume name |
| start | uint64 | Split the metadata shard based on this value |
Query
curl -v "http://10.196.59.198:17010/metaPartition/get?id=1" | python -m json.tool
Displays detailed information about the metadata shard, including the shard ID, the starting range of the shard, etc.
Parameter List
| Parameter | Type | Description |
|---|---|---|
| id | uint64 | Metadata shard ID |
Response Example
{
"PartitionID": 1,
"Start": 0,
"End": 9223372036854776000,
"MaxNodeID": 1,
"VolName": "test",
"Replicas": {},
"ReplicaNum": 3,
"Status": 2,
"IsRecover": true,
"Hosts": {},
"Peers": {},
"Zones": {},
"MissNodes": {},
"LoadResponse": {}
}
Decommission Replica
curl -v "http://10.196.59.198:17010/metaPartition/decommission?id=13&addr=10.196.59.202:17210"
Removes a replica of the metadata shard and creates a new replica.
Parameter List
| Parameter | Type | Description |
|---|---|---|
| id | uint64 | Metadata partition ID |
| addr | string | Address of the replica to be removed |
Compare Replica
curl -v "http://10.196.59.198:17010/metaPartition/load?id=1"
Sends a task to compare the replica to each replica, and then checks whether the CRC of each replica is consistent.
Parameter List
| Parameter | Type | Description |
|---|---|---|
| id | uint64 | Metadata partition ID |
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