# crash-recovery

Published articles for crash-recovery.

This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles.

## 【etcd】WAL 与快照：预写日志、crash recovery 与 commit vs applied

DevFeed: [【etcd】WAL 与快照：预写日志、crash recovery 与 commit vs applied](<https://devfeed.tech/articles/etcd-wal-crash-recovery-commit-vs-applied-33985.md>)

Original publisher: [Read original article](<https://quant67.com/post/etcd/03-wal-snapshot/03-wal-snapshot.html>)

Author: Liao Tonglang

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

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

Tags: [applied-index](<https://devfeed.tech/tags/applied-index.md>), [committed-index](<https://devfeed.tech/tags/committed-index.md>), [crash-recovery](<https://devfeed.tech/tags/crash-recovery.md>), [distributed](<https://devfeed.tech/tags/distributed.md>), [etcd](<https://devfeed.tech/tags/etcd.md>), [kubernetes](<https://devfeed.tech/tags/kubernetes.md>), [latency](<https://devfeed.tech/tags/latency.md>), [persistence](<https://devfeed.tech/tags/persistence.md>), [safety](<https://devfeed.tech/tags/safety.md>), [snapshot](<https://devfeed.tech/tags/snapshot.md>), [v3-5-33](<https://devfeed.tech/tags/v3-5-33.md>), [wal](<https://devfeed.tech/tags/wal.md>)

### AI overview

This tutorial explains how etcd v3.5.33 uses WAL segments and Raft snapshots for persistence, log compaction, and crash recovery. It also describes how committed and applied indexes can diverge, causing Watch delays or extended not-ready periods even when Raft replication appears healthy.

### Source excerpt

拆解 etcd v3.5.33 的 WAL 段文件、Raft snapshot 触发与重启 recovery 顺序；钉清 committed index 与 applied index 分叉对排障与 K8s 控制面的含义。

## LangGraph in production: Temporal's LangGraph Plugin adds Durable Execution

DevFeed: [LangGraph in production: Temporal's LangGraph Plugin adds Durable Execution](<https://devfeed.tech/articles/langgraph-in-production-temporal-s-langgraph-plugin-adds-durable-execution-36020.md>)

Original publisher: [Read original article](<https://temporal.io/blog/temporal-langgraph-plugin-durable-execution>)

Author: Brian Strauch

Published: 2026-07-16T00:00:00Z

Content type: release

Language: en

Sources: [Temporal Blog](<https://devfeed.tech/sources/temporal-blog.md>)

Topics: [Langgraph](<https://devfeed.tech/topics/langgraph.md>), [Orchestration](<https://devfeed.tech/topics/orchestration.md>), [Agent Framework](<https://devfeed.tech/topics/agent-framework.md>), [human review](<https://devfeed.tech/topics/human-review.md>), [Python](<https://devfeed.tech/topics/python.md>), [telemetry](<https://devfeed.tech/topics/telemetry.md>)

Tags: [agent-framework](<https://devfeed.tech/tags/agent-framework.md>), [crash-recovery](<https://devfeed.tech/tags/crash-recovery.md>), [human-review](<https://devfeed.tech/tags/human-review.md>), [langgraph](<https://devfeed.tech/tags/langgraph.md>), [orchestration](<https://devfeed.tech/tags/orchestration.md>), [product-news](<https://devfeed.tech/tags/product-news.md>), [python](<https://devfeed.tech/tags/python.md>)

### AI overview

Temporal announces a public-preview LangGraph integration for Python, allowing LangGraph agents to run on Temporal with automatic failure recovery, durable execution, human-in-the-loop waits, and support for long-running work. The announcement also covers LangSmith integrations for Python and TypeScript.

### Source excerpt

LangGraph agents now run on Temporal: automatic crash recovery, free human-in-the-loop waits, and full observability via new LangSmith integration.

## How Databases Checkpoint to Disk Without Stopping the World

DevFeed: [How Databases Checkpoint to Disk Without Stopping the World](<https://devfeed.tech/articles/how-databases-checkpoint-to-disk-without-stopping-the-world-39653.md>)

Original publisher: [Read original article](<https://www.gauravsarma.com/posts/2026-03-15_checkpointing-without-stopping-the-world>)

Published: 2026-03-15T00:00:00Z

Content type: tutorial

Language: en

Sources: [Gaurav Sarma's Blog](<https://devfeed.tech/sources/gaurav-sarma-s-blog.md>)

Topics: [Databases](<https://devfeed.tech/topics/databases.md>), [PostgreSQL](<https://devfeed.tech/topics/postgresql.md>)

Tags: [checkpoint](<https://devfeed.tech/tags/checkpoint.md>), [crash-recovery](<https://devfeed.tech/tags/crash-recovery.md>), [databases](<https://devfeed.tech/tags/databases.md>), [latency](<https://devfeed.tech/tags/latency.md>), [postgresql](<https://devfeed.tech/tags/postgresql.md>), [snapshot](<https://devfeed.tech/tags/snapshot.md>), [wal](<https://devfeed.tech/tags/wal.md>)

### AI overview

A tutorial on database checkpointing explains why pausing writes to flush all dirty pages causes latency spikes and throughput stalls. It introduces fuzzy or online checkpointing, including PostgreSQL's WAL-based approach, which allows writes to continue while dirty pages are flushed and uses WAL replay during crash recovery.

### Source excerpt

Your database has gigabytes of dirty pages in memory. At some point they need to hit disk...