In ClickHouse Cloud, tables use the SharedMergeTree engine, which stores data in shared object storage with metadata coordinated through ClickHouse Keeper. This architecture changes the mutation picture: since replicas don't communicate directly with each other and all data lives in shared storage, mutations don't need to be independently applied on each replica — the rewritten parts are written to shared storage and become visible to all replicas through metadata updates. This leads to faster mutation execution and eliminates the replication delays that self-managed clusters can experience during heavy mutation workloads. Both classic mutations and lightweight updates with patch parts are available in ClickHouse Cloud.
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Дибров рассказал о новой возлюбленной20:41，详情可参考谷歌
The Serde remote pattern works well to support explicit implementations when the coherence rules prevent the implementation of the Serialize or Deserialize trait. However, it is not without its drawbacks. If other crates wanted to adopt a similar pattern, they would need to implement their own complex proc macros just for their specific traits. So, with these limitations in mind, let's think about how we can generalize this pattern and make it much easier to support explicit implementations across the board.