elasticsearchHow do I reindex my data in Elasticsearch?
Reindexing in Elasticsearch is the process of changing the existing index structure or settings. This can be done in two ways:
- Using the Reindex API:
The Reindex API allows you to copy documents from one index to another, possibly changing the index settings and/or the mapping along the way.
Example
POST _reindex
{
"source": {
"index": "my_source_index"
},
"dest": {
"index": "my_dest_index"
}
}
Output example
{
"took": 9,
"timed_out": false,
"_scroll_id": "DXF1ZXJ5QW5kRmV0Y2gBAAAAAAAAAD4WYm9laVYtZndUQlNsdDcwakFMNjU1QQ==",
"total": 5,
"updated": 0,
"created": 5,
"deleted": 0,
"batches": 1,
"version_conflicts": 0,
"noops": 0,
"retries": {
"bulk": 0,
"search": 0
},
"throttled_millis": 0,
"requests_per_second": -1.0,
"throttled_until_millis": 0
}
The parts of the code are:
- The
POST
command, to send the request to the server. - The
_reindex
endpoint, which is the Elasticsearch API used for reindexing. - The
source
anddest
objects, which define the source and destination indices. - Parameters such as
_scroll_id
,total
,created
, anddeleted
, which provide information about the reindexing process.
- Using Logstash:
Logstash is a data processing pipeline that allows you to transform data from one format to another. You can use Logstash to reindex Elasticsearch data by setting up a pipeline that reads from the source index, transforms the data if needed, and then writes to the destination index.
Helpful links
More of Elasticsearch
- How can I use Elasticsearch and ZFS together?
- How can I set up and use Elasticsearch on the Yandex Cloud platform?
- How do I configure elasticsearch to use an XMS memory allocator?
- How do I configure Elasticsearch shards?
- How can I configure an Elasticsearch Prometheus exporter?
- How do I set up an Elasticsearch Yum repository?
- How do I use an elasticsearch query builder?
- How can I integrate Elasticsearch into a Yii2 application?
- How can I use Yandex Mirror to access Elasticsearch data?
- How can I use an Elasticsearch tokenizer?
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