Merges two adjacent shards that are in the readwrite state. You can specify a shard ID in the request. Then, Log Service locates the adjacent shard and combines the two shards into a single shard.
Usage notes
- Host consists of a project name and a Log Service endpoint. You must specify a project in Host.
- Each shard has an MD5 hash range, and each range is a left-closed, right-open interval. The interval is in the
[BeginKey,EndKey)
format. A shard can be in the readwrite or readonly state. You can split and merge shards. For more information, see Shard. -
An AccessKey pair is created and obtained. For more information, see AccessKey pair.
The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in Log Service is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. Make sure that the RAM user has the management permissions on Log Service resources. For more information, see Create a RAM user and authorize the RAM user to access Log Service.
- The information that is required to query logs is obtained. The information includes the name of the project to which the logs belong, the region of the project, and the name of the Logstore to which the logs belong. For more information, see Manage a project and Manage a Logstore.
Debugging
Request headers
The MergeShard operation does not have operation-specific request headers and uses only common request headers. For more information, see Common request parameters.
Request syntax
POST /logstores/{logstore}/shards/{shard}?action=merge HTTP/1.1
Request parameters
Parameter | Type | Position | Required | Example | Description |
---|---|---|---|---|---|
project | String | Host | Yes | ali-test-project | The name of the project. |
logstore | String | Path | Yes | ali-test-logstore | The name of the Logstore. |
shard | String | Path | Yes | 3 | The ID of the shard. |
Response parameters
Parameter | Type | Example | Description |
---|---|---|---|
Server | String | nginx | The name of the server. |
Content-Type | String | application/json | The format of the response body. |
Content-Length | String | 0 | The length of the response body. |
Connection | String | close | Indicates whether the connection is persistent. Valid values:
|
Date | String | Sun, 27 May 2018 08:25:04 GMT | The time when the response was returned. |
x-log-requestid | String | 5B0A6B60BB6EE39764D458B5 | The request ID. |
Array of shard | The data structure of the shard. |
Examples
Sample requests
POST /logstores/ali-test-logstore/shards/{shard}?action=merge HTTP/1.1
Host:ali-test-project.cn-hangzhou.log.aliyuncs.com
Content-Type:application/json
Sample success responses
JSON
format
HTTP/1.1 200 OK
Content-Type:application/json
[ {
"shardID" : 0,
"status" : "readwrite",
"inclusiveBeginKey" : "e0000000000000000000000000000000",
"exclusiveEndKey" : "ffffffffffffffffffffffffffffffff",
"serverIp" : "10.0.xx.x",
"createTime" : 1453949705
}, {
"shardID" : 1,
"status" : "readwrite",
"inclusiveBeginKey" : "e0000000000000000000000000000000",
"exclusiveEndKey" : "e7000000000000000000000000000000",
"serverIp" : "10.0.xx.x",
"createTime" : 1453949705
}, {
"shardID" : 2,
"status" : "readwrite",
"inclusiveBeginKey" : "e7000000000000000000000000000000",
"exclusiveEndKey" : "ffffffffffffffffffffffffffffffff",
"serverIp" : "10.0.xx.x",
"createTime" : 1453949705
} ]
Error codes
For a list of error codes, see Service error codes.
HttpStatusCode |
ErrorCode |
ErrorMessage |
Description |
---|---|---|---|
404 |
ProjectNotExist |
Project does not exist. |
The specified project does not exist. |
404 |
LogStoreNotExist |
Logstore does not exist. |
The specified Logstore does not exist. |
400 |
ParameterInvalid |
invalid shard id. |
The specified shard ID is invalid. |
400 |
ParameterInvalid |
can not merge the last shard. |
The last shard cannot be merged. |
400 |
LogStoreWithoutShard |
logstore has no shard. |
No shards exist in the specified Logstore. |
500 |
InternalServerError |
Specified Server Error Message. |
An internal server error has occurred. |
For more information, see Error codes.