mirror of https://github.com/apache/druid.git
35 lines
1.4 KiB
Markdown
35 lines
1.4 KiB
Markdown
---
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id: index
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title: "Data management"
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sidebar_label: "Overview"
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---
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Apache Druid stores data [partitioned by time chunk](../design/architecture.md#datasources-and-segments) in immutable
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files called [segments](../design/segments.md). Data management operations involving replacing, or deleting,
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these segments include:
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- [Updates](update.md) to existing data.
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- [Deletion](delete.md) of existing data.
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- [Schema changes](schema-changes.md) for new and existing data.
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- [Compaction](compaction.md) and [automatic compaction](automatic-compaction.md), which reindex existing data to
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optimize storage footprint and performance.
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