Split index
Introduced 0.1.0
The split index API operation splits an existing read-only index into a new index, cutting each primary shard into some amount of primary shards in the new index.
Example
PUT /sample-index1/_split/split-index1
{
"settings": {
"index": {
"number_of_shards": 4,
"number_of_replicas": 2
}
},
"aliases": {
"sample-alias1": {}
}
}
Path and HTTP methods
POST /<source-index>/_split/<target-index>
PUT /<source-index>/_split/<target-index>
Index naming restrictions
Lucenia indexes have the following naming restrictions:
- All letters must be lowercase.
- Index names can’t begin with underscores (
_) or hyphens (-). -
Index names can’t contain spaces, commas, or the following characters:
:,",*,+,/,\,|,?,#,>, or<
URL parameters
Your request must include the source and target indexes. All split index parameters are optional.
| Parameter | Type | Description |
|---|---|---|
| <source-index> | String | The source index to split. |
| <target-index> | String | The index to create. |
| wait_for_active_shards | String | The number of active shards that must be available before Lucenia processes the request. Default is 1 (only the primary shard). Set to all or a positive integer. Values greater than 1 require replicas. For example, if you specify a value of 3, the index must have two replicas distributed across two additional nodes for the operation to succeed. |
| cluster_manager_timeout | Time | How long to wait for a connection to the cluster manager node. Default is 30s. |
| timeout | Time | How long to wait for the request to return. Default is 30s. |
| wait_for_completion | Boolean | When set to false, the request returns immediately instead of after the operation is finished. To monitor the operation status, use the Tasks API with the task ID returned by the request. Default is true. |
| task_execution_timeout | Time | The explicit task execution timeout. Only useful when wait_for_completion is set to false. Default is 1h. |
Request body
The split index API operation creates a new target index, so you can specify any index settings and aliases to apply to the target index.
Response
{
"acknowledged": true,
"shards_acknowledged": true,
"index": "split-index1"
}
Index codec considerations
For index codec considerations, see Index codecs.