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ashwinkumar12345 2021-07-12 09:16:13 -07:00
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_opensearch/data-streams.md
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@ -23,7 +23,7 @@ Even after you perform all these operations, you’re still not enforcing the be
Data streams abstract the complexity and enforce the best practices for managing time-series data.
With data streams, you can store append-only time-series data across multiple indices with a single end-point for ingesting and searching data. It replaces index aliases for time-series data.
With data streams, you can store append-only time-series data across multiple indices with a single endpoint for ingesting and searching data. It replaces index aliases for time-series data.
## About data streams
@ -105,11 +105,6 @@ PUT _data_stream/logs-nginx
You can also directly start ingesting data without creating a data stream.
```json
PUT _data_stream/logs-redis
PUT _data_stream/logs-nginx
```
Because we have a matching index template with a data_stream object, OpenSearch automatically creates the data stream:
```json
@ -183,7 +178,7 @@ GET _data_stream/logs-nginx/_stats
### Step 3: Ingest data into the data stream
To ingest data into a data stream, you can use the regular indexing APIs. Make sure every document that you index has a timestamp field. If you try to ingest a document that doesn't have a timestamp field, you'll get an error.
To ingest data into a data stream, you can use the regular indexing APIs. Make sure every document that you index has a timestamp field. If you try to ingest a document that doesn't have a timestamp field, you get an error.
```json
POST logs-redis/_doc
@ -196,7 +191,7 @@ POST logs-redis/_doc
### Step 4: Searching a data stream
You can search a data stream just like you search a regular index or an index alias.
The search operation applies to all of the backing indices, that’s all of the data present in the data stream.
The search operation applies to all of the backing indices (all data present in the stream).
```json
GET logs-redis/_search
@ -272,7 +267,7 @@ If you now perform a `GET` operation on the `logs-redis` data stream, you see th
You can also set up an [Index State Management (ISM) policy]({{site.url}}{{site.baseurl}}/ism/policies/) to automate the rollover process for the data stream.
The ISM policy is applied to the backing indices at the time of their creation. When you associate a policy to a data stream, it only affects the future backing indices of that data stream.
You also don’t need to provide the `rollover_alias` setting because the ISM policy infers this information from the backing index.
You also don’t need to provide the `rollover_alias` setting, because the ISM policy infers this information from the backing index.
### Step 6: Manage data streams in OpenSearch Dashboards