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Copy file name to clipboardExpand all lines: cmd/mcp-victorialogs/resources/vm/docs/victorialogs/FAQ.md
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weight: 6
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title: FAQ
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menu:
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docs:
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identifier: "victorialogs-faq"
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parent: "victorialogs"
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weight: 6
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title: FAQ
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tags:
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- logs
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## What is the difference between VictoriaLogs and ClickHouse?
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ClickHouse is an extremely fast and efficient analytical database. It can be used for logs storage, analysis and processing.
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VictoriaLogs is designed solely for logs. VictoriaLogs uses [similar design ideas as ClickHouse](#how-does-victorialogs-work) for achieving high performance.
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VictoriaLogs is designed solely for logs. VictoriaLogs uses [similar design ideas as ClickHouse](https://docs.victoriametrics.com/victorialogs/faq/#how-does-victorialogs-work) for achieving high performance.
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- ClickHouse is good for logs if you know the set of [log fields](https://docs.victoriametrics.com/victorialogs/keyconcepts/#data-model)
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and the expected query types beforehand. Then you can create a table with a column per each log field, and use the most optimal settings for the table -
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then make sure the selected time range covers the last day. Otherwise, the query above returns
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results on the intersection of the last day and the selected time range.
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See [why the log field occupies a lot of disk space](#why-the-log-field-occupies-a-lot-of-disk-space).
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See [why the log field occupies a lot of disk space](https://docs.victoriametrics.com/victorialogs/faq/#why-the-log-field-occupies-a-lot-of-disk-space).
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## Why the log field occupies a lot of disk space?
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See [how to determine which log fields occupy the most of disk space](#how-to-determine-which-log-fields-occupy-the-most-of-disk-space).
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See [how to determine which log fields occupy the most of disk space](https://docs.victoriametrics.com/victorialogs/faq/#how-to-determine-which-log-fields-occupy-the-most-of-disk-space).
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Log field may occupy a lot of disk space if it contains values with many unique parts (aka "random" values).
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Such values do not compress well, so they occupy a lot of disk space. If you want reducing the amounts of occupied disk space,
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then either remove the given log field from the [ingested](https://docs.victoriametrics.com/victorialogs/data-ingestion/) logs
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