卷回，读音juàn hu，是一个汉语词汇，释义道路弯曲回旋貌，出处明 陈子龙 《秣陵杂诗》。
分布式系统故障卷回恢复技术研究与实践_医网打尽文献搜索 关键词：双工；故障恢复；卷回；故障检测 [gap=530]Key words：duplex system;fault recovery;rollback;fault detection
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... up the wind 顶着风，逆着风 wind back 卷回，绕回，把（钟表）往回拨 wind down (发条)转松，即将停下来；放松，休息；逐渐减少 ...
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As an effective method of fault-tolerance,technologies of coordinated checkpoint and rollback recovery are widely used on the parallel or distributed computer systems.
协同式检查点设置及卷回恢复技术是一种简单有效的容错手段,被广泛地运用于并行/分布式系统中。
参考来源 - 一种低开销非阻塞的协同式检查点算法 in C·2,447,543篇论文数据，部分数据来源于NoteExpress
上述系统的开销主要来自两方面：其一是每个检查点的比较和保存开销，其二是因故障而引起的卷回。
The overhead of such systems comes from two aspects: comparing and saving operations at each checkpoint, and the rollbacks caused by faults.
一个被修改的行永远被锁(互斥的)，除非产生这个锁的事务被提交或者卷回，其他事务不能修改这个行。
A modified row is always locked exclusively so that other transactions cannot modify the row until the transaction holding the lock is committed or rolled back.
提出一种基于客户-代理-服务器的卷回调算法来解决传统回调算法所面临的两个主要问题：可扩充性和客户端断连。
In this paper, client-proxy-server based volume callback algorithms are introduced to address two key issues that face the traditional algorithms: scalability and client disconnection.
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