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Merge pull request ClickHouse#64741 from primeroz/add-note-about-zstd…
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Add Note about ZSTD_QAT codec being disabled in ClickHouse Cloud
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nikitamikhaylov authored Jun 3, 2024
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Expand Up @@ -410,6 +410,10 @@ High compression levels are useful for asymmetric scenarios, like compress once,
- For compression, ZSTD_QAT tries to use an Intel® QAT offloading device ([QuickAssist Technology](https://www.intel.com/content/www/us/en/developer/topic-technology/open/quick-assist-technology/overview.html)). If no such device was found, it will fallback to ZSTD compression in software.
- Decompression is always performed in software.

:::note
ZSTD_QAT is not available in ClickHouse Cloud.
:::

#### DEFLATE_QPL

`DEFLATE_QPL`[Deflate compression algorithm](https://github.com/intel/qpl) implemented by Intel® Query Processing Library. Some limitations apply:
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