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crash-recovery-persistence-design

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UpdatedApril 17, 2026 at 07:10

当用户设计文件系统、数据库存储引擎、分布式存储或 RAID 阵列时,需要在崩溃恢复与持久化策略之间做量化权衡。触发信号包括:WAL/journaling 模式选择、ARIES Redo/Undo、LFS 与 COW 对比、fsync 顺序、metadata journaling、断电一致性、small-write penalty 等。 不适用于:纯查询优化(加索引/改写 SQL)、无持久化层的纯网络架构、日常应用层缓存选型。

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