Disconnected Operation for AFS

Disconnected Operation for AFS
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AFS 的断开操作

DOI:
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发表时间:
1993
期刊:
Symposium on Mobile and Location-Independent Computing
影响因子:
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通讯作者:
P. Honeyman
P. Honeyman
中科院分区:
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文献类型:
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作者:
L. Huston;P. Honeyman

文献摘要

被引文献

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AFS 在我们的移动工作站计划中发挥着重要作用。 AFS 客户端管理最近使用的文件和目录的缓存。但即使缓存很热,对缓存数据的访问也经常涉及与一个或多个文件服务器的某些通信,以维持一致性保证。如果没有网络访问,缓存的数据很快就会变得不可用。 我们修改了 AFS 缓存管理器,以便在无法与文件服务器通信时提供乐观一致性保证。当客户端重新建立与文件服务器的连接时,它会尝试将所有文​​件修改传播到服务器。如果检测到冲突,重播代理会通知用户需要手动解决。 我们的系统将当代分布式计算环境的优势带入移动笔记本电脑,为游牧计算的潜力提供了全新的视角。
AFS plays a prominent role in our plans for a mobile workstation. The AFS client manages a cache of the most recently used files and directories. But even when the cache is hot, access to cached data frequently involves some communication with one or more file servers to maintain consistency guarantees. Without network access, cached data is soon rendered unavailable. We have modified the AFS cache manager to offer optimistic consistency guarantees when it can not communicate with a fileserver. When the client reestablishes a connection with the file server, it tries to propagate all file modifications to the server. If conflicts are detected, the replay agent notifies the user that manual resolution is needed. Our system brings the benefits of contemporary distributed computing environments to mobile laptops, offering a fresh look at the potential for nomadic computing.