# exclusion-tree

Published articles for exclusion-tree.

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## 【kube-apiserver】选型收束与开放问题：排除树、Kine 与 events 分集群

DevFeed: [【kube-apiserver】选型收束与开放问题：排除树、Kine 与 events 分集群](<https://devfeed.tech/articles/kube-apiserver-kine-events-33972.md>)

Original publisher: [Read original article](<https://quant67.com/post/apiserver/16-selection/16-selection.html>)

Author: Liao Tonglang

Published: 2026-08-28T00:00:00Z

Content type: tutorial

Language: zh

Sources: [土法炼钢 - 系统与基础设施](<https://devfeed.tech/sources/source-4.md>)

Topics: [Kubernetes](<https://devfeed.tech/topics/kubernetes.md>), [Caching](<https://devfeed.tech/topics/caching.md>), [etcd](<https://devfeed.tech/topics/etcd.md>), [SQL](<https://devfeed.tech/topics/sql.md>), [MySQL](<https://devfeed.tech/topics/mysql.md>), [PostgreSQL](<https://devfeed.tech/topics/postgresql.md>), [SQLite](<https://devfeed.tech/topics/sqlite.md>), [Raft](<https://devfeed.tech/topics/raft.md>)

Tags: [apiserver](<https://devfeed.tech/tags/apiserver.md>), [churn](<https://devfeed.tech/tags/churn.md>), [distributed](<https://devfeed.tech/tags/distributed.md>), [errcompacted](<https://devfeed.tech/tags/errcompacted.md>), [etcd](<https://devfeed.tech/tags/etcd.md>), [events](<https://devfeed.tech/tags/events.md>), [exclusion-tree](<https://devfeed.tech/tags/exclusion-tree.md>), [kine](<https://devfeed.tech/tags/kine.md>), [kubernetes](<https://devfeed.tech/tags/kubernetes.md>), [mysql](<https://devfeed.tech/tags/mysql.md>), [open-questions](<https://devfeed.tech/tags/open-questions.md>), [postgresql](<https://devfeed.tech/tags/postgresql.md>), [quota](<https://devfeed.tech/tags/quota.md>), [raft](<https://devfeed.tech/tags/raft.md>), [selection](<https://devfeed.tech/tags/selection.md>), [sql](<https://devfeed.tech/tags/sql.md>), [sqlite](<https://devfeed.tech/tags/sqlite.md>), [storage](<https://devfeed.tech/tags/storage.md>), [ttl](<https://devfeed.tech/tags/ttl.md>), [v1-30-3](<https://devfeed.tech/tags/v1-30-3.md>), [watch-cache](<https://devfeed.tech/tags/watch-cache.md>)

### AI overview

This concluding article presents a mechanism-based decision tree for diagnosing Kubernetes control-plane issues across kube-apiserver and etcd layers. It explains Kine's differing Watch semantics when using SQLite, PostgreSQL, or MySQL backends, discusses routing Kubernetes Events to a separate etcd cluster, and identifies open questions around watch-cache SLOs, compaction, linear reads, and Lease fencing.

### Source excerpt

用机制排除树收束何时查 apiserver 轴、何时穿透 etcd 轴、何时两轴联查；回收 etcd/13 写下的 apiserver 停损线；Kine SQL backend 的 Watch 语义差与 Jepsen 覆盖空白；events --etcd-servers-overrides 分集群运维；列出 watch cache SLO 联合模型、线性读期望与 Lease+fencing 全链路三个开放问题；以 ADR 语言关闭系列边界。

## 【etcd】选型收束与开放问题：排除树与系列边界关闭

DevFeed: [【etcd】选型收束与开放问题：排除树与系列边界关闭](<https://devfeed.tech/articles/etcd-33998.md>)

Original publisher: [Read original article](<https://quant67.com/post/etcd/16-selection/16-selection.html>)

Author: Liao Tonglang

Published: 2026-08-26T00:00:00Z

Content type: article

Language: zh

Sources: [土法炼钢 - 系统与基础设施](<https://devfeed.tech/sources/source-4.md>)

Topics: [etcd](<https://devfeed.tech/topics/etcd.md>), [Raft](<https://devfeed.tech/topics/raft.md>), [Kubernetes](<https://devfeed.tech/topics/kubernetes.md>)

Tags: [apiserver](<https://devfeed.tech/tags/apiserver.md>), [backup](<https://devfeed.tech/tags/backup.md>), [compaction](<https://devfeed.tech/tags/compaction.md>), [distributed](<https://devfeed.tech/tags/distributed.md>), [etcd](<https://devfeed.tech/tags/etcd.md>), [exclusion-tree](<https://devfeed.tech/tags/exclusion-tree.md>), [foundationdb](<https://devfeed.tech/tags/foundationdb.md>), [guide](<https://devfeed.tech/tags/guide.md>), [k8s](<https://devfeed.tech/tags/k8s.md>), [kubernetes](<https://devfeed.tech/tags/kubernetes.md>), [lease](<https://devfeed.tech/tags/lease.md>), [open-questions](<https://devfeed.tech/tags/open-questions.md>), [raft](<https://devfeed.tech/tags/raft.md>), [selection](<https://devfeed.tech/tags/selection.md>), [tikv](<https://devfeed.tech/tags/tikv.md>), [v3](<https://devfeed.tech/tags/v3.md>), [v3-5-33](<https://devfeed.tech/tags/v3-5-33.md>), [zookeeper](<https://devfeed.tech/tags/zookeeper.md>)

### AI overview

This concluding article presents a mechanism-based decision tree for deciding when to retain etcd and when to migrate to TiKV or FoundationDB. It defines etcd's fit for small data sets with Watch and Lease dependencies, identifies disqualifying conditions such as quota pressure, sharding needs, cross-key transactions, Watch backpressure, and insufficient operational capacity, and clarifies the boundaries between related article series.

### Source excerpt

用机制排除树收束何时该留 etcd、何时迁 TiKV/FDB/ZK；回收 distributed/39、tikv-htap/18、foundationdb/18 的 etcd 叶；列出 Watch 背压、Lease+fencing、quota 迁移等开放问题；以 ADR 语言关闭续作边界。