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git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@1019 29311d96-e01e-0410-9327-a35deaab8ce9
19 lines
719 B
Plaintext
19 lines
719 B
Plaintext
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Primary copy replication.
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Inodes:
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- The primary's list of replicas (cached_by) is inclusive at all times.
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- The primary's list never includes the local node.
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- The primary's list of replicas will only include non-replicas when the relevant CacheExpire notifications are in-flight.
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- Replicas can be created in two ways:
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- via a Discover + DiscoverReply
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- via an export and import. (The old auth keeps a copy, and adds itself to the replica list as it exports.)
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Directories (and their dentries):
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- The primary has an open_by list that is inclusive at all times.
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- ..Never includes local node
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- No per-dentry replica lists. All dentry lock operations (for unlink, etc.) are sent to all nodes in open_by list. |