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Distributed SCM Repositories

Distributed SCM Repositories. Justin R. Erenkrantz ICS 280 December 4th, 2002. Subversion. “Compelling replacement for CVS” Still has a centralized server model WebDAV is the core transport protocol How can we distribute the repositories? Geographical dispersion Offline access.

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Distributed SCM Repositories

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  1. Distributed SCM Repositories Justin R. Erenkrantz ICS 280 December 4th, 2002

  2. Subversion • “Compelling replacement for CVS” • Still has a centralized server model • WebDAV is the core transport protocol • How can we distribute the repositories? • Geographical dispersion • Offline access

  3. Internal or External Replication • Subversion internally uses Berkeley DB • Has primitive notion of replication • Can we use its replication? • Another strategy is leverage WebDAV • Intercept calls to the original server • Proxies are well-defined by HTTP • Virtually ignored by WebDAV

  4. Proposed Solution • Combination of two approaches • Master pushes out database changes • Requires registration of slave servers • Slaves handle all operations • Read-only slaves • Handles read on its own • Transparently divert write to master

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