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18 lines
1.4 KiB
Markdown
18 lines
1.4 KiB
Markdown
---
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toc_folder_title: MergeTree Family
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toc_priority: 28
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toc_title: Introduction
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---
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# MergeTree Engine Family {#mergetree-engine-family}
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Table engines from the MergeTree family are the core of ClickHouse data storage capabilities. They provide most features for resilience and high-performance data retrieval: columnar storage, custom partitioning, sparse primary index, secondary data-skipping indexes, etc.
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Base [MergeTree](../../../engines/table-engines/mergetree-family/mergetree.md) table engine can be considered the default table engine for single-node ClickHouse instances because it is versatile and practical for a wide range of use cases.
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For production usage [ReplicatedMergeTree](../../../engines/table-engines/mergetree-family/replication.md) is the way to go, because it adds high-availability to all features of regular MergeTree engine. A bonus is automatic data deduplication on data ingestion, so the software can safely retry if there was some network issue during insert.
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All other engines of MergeTree family add extra functionality for some specific use cases. Usually, it’s implemented as additional data manipulation in background.
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The main downside of MergeTree engines is that they are rather heavy-weight. So the typical pattern is to have not so many of them. If you need many small tables, for example for temporary data, consider [Log engine family](../../../engines/table-engines/log-family/index.md).
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