Mention use of docvalue skippers in TSDS documentation #4412
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leemthompo
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manage-data/data-store/data-streams/time-series-data-stream-tsds.md
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…ds.md Co-authored-by: Liam Thompson <leemthompo@gmail.com>
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manage-data/data-store/data-streams/time-series-data-stream-tsds.md
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| * **Dimension-based routing:** The routing logic uses dimension fields to map all data points of a time series to the same shard, improving storage efficiency and query performance. Duplicate data points are rejected. | ||
| * **Sorting:** A TSDS uses internal [index sorting](elasticsearch://reference/elasticsearch/index-settings/sorting.md) to order shard segments by `_tsid` and `@timestamp`, for better compression. Time series data streams do not use `index.sort.*` settings. | ||
| * **Source field:** A TSDS uses [synthetic `_source`](elasticsearch://reference/elasticsearch/mapping-reference/mapping-source-field.md#synthetic-source), and as a result is subject to some [restrictions](elasticsearch://reference/elasticsearch/mapping-reference/mapping-source-field.md#synthetic-source-restrictions) and [modifications](elasticsearch://reference/elasticsearch/mapping-reference/mapping-source-field.md#synthetic-source-modifications) applied to the `_source` field. | ||
| * {applies_to}`stack: ga 9.3` **Docvalue Skippers:** A TSDS enables [docvalue skippers](elasticsearch://reference/elasticsearch/mapping-reference/doc-values.md#doc-values-skippers) on its `_tsid`, `@timestamp`, [dimension](#time-series-dimension) and [metric](#time-series-metric) fields. Because `tsid` and `@timestamp` are part of the index sort, this allows {{es}} to avoid building backing indexes for these fields, meaning lower disk usage and faster ingest speed. |
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| * {applies_to}`stack: ga 9.3` **Docvalue Skippers:** A TSDS enables [docvalue skippers](elasticsearch://reference/elasticsearch/mapping-reference/doc-values.md#doc-values-skippers) on its `_tsid`, `@timestamp`, [dimension](#time-series-dimension) and [metric](#time-series-metric) fields. Because `tsid` and `@timestamp` are part of the index sort, this allows {{es}} to avoid building backing indexes for these fields, meaning lower disk usage and faster ingest speed. | |
| * {applies_to}`stack: ga 9.3` **Doc values skippers:** A TSDS enables [docvalue skippers](elasticsearch://reference/elasticsearch/mapping-reference/doc-values.md#doc-values-skippers) on its `_tsid`, `@timestamp`, [dimension](#time-series-dimension) and [metric](#time-series-metric) fields. Because `tsid` and `@timestamp` are part of the index sort, this allows {{es}} to avoid building backing indexes for these fields, meaning lower disk usage and faster ingest speed. |
Updating to sentence case capitalization + they're called "doc values skippers" in the page you are linking to
wajihaparvez
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Thanks @romseygeek! Just two minor suggestions
…ds.md Co-authored-by: wajihaparvez <wajiha.parvez@elastic.co>
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Summary
Update TSDS docs to mention the use of doc values skippers, and cross-link to the internal ES docs.
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