[doc] remove single replica compaction documentation#3870
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Remove all documentation and example references to the single replica compaction feature (enable_single_replica_compaction / max_single_replica_compaction_threads) across dev and 4.x, EN and ZH: - compaction.md: drop the "Single replica compaction" section and the max_single_replica_compaction_threads bullet - be-config.md: drop the max_single_replica_compaction_threads entry - CREATE-TABLE.md: drop the enable_single_replica_compaction property row - key-features/data-compaction.mdx: drop the related paragraph and bullet - connector tutorials, array-contains, basic-concepts, ccr/feature: drop the example/reference occurrences of the property Unrelated single-replica storage / data-import mentions are left intact. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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gavinchou
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Remove the single replica compaction (SRC) feature end-to-end across BE, FE and regression tests. Doc: apache/doris-website#3870 ### Why remove it The main reason is **correctness risk in peer selection**. A follower replica had to pick a peer holding a "proper" version (`_find_rowset_to_fetch`) and fetch its compacted result, based on replica info that was only refreshed periodically. Because replicas progress through versions independently and this "leader" selection ran against a stale, time-sensitive view of the cluster, the hoice of which peer to fetch from — and which version — was racy and could select a peer whose state no longer matched, leading to subtle inconsistencies.
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Remove the single replica compaction (SRC) feature end-to-end across BE, FE and regression tests. Doc: apache/doris-website#3870 ### Why remove it The main reason is **correctness risk in peer selection**. A follower replica had to pick a peer holding a "proper" version (`_find_rowset_to_fetch`) and fetch its compacted result, based on replica info that was only refreshed periodically. Because replicas progress through versions independently and this "leader" selection ran against a stale, time-sensitive view of the cluster, the hoice of which peer to fetch from — and which version — was racy and could select a peer whose state no longer matched, leading to subtle inconsistencies.
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Remove the single replica compaction (SRC) feature end-to-end across BE, FE and regression tests. Doc: apache/doris-website#3870 ### Why remove it The main reason is **correctness risk in peer selection**. A follower replica had to pick a peer holding a "proper" version (`_find_rowset_to_fetch`) and fetch its compacted result, based on replica info that was only refreshed periodically. Because replicas progress through versions independently and this "leader" selection ran against a stale, time-sensitive view of the cluster, the hoice of which peer to fetch from — and which version — was racy and could select a peer whose state no longer matched, leading to subtle inconsistencies.
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Remove all documentation and example references to the single replica compaction feature (enable_single_replica_compaction / max_single_replica_compaction_threads) across dev and 4.x, EN and ZH:
Unrelated single-replica storage / data-import mentions are left intact.
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