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183857fe7e
git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@1248 29311d96-e01e-0410-9327-a35deaab8ce9
23 lines
783 B
Plaintext
23 lines
783 B
Plaintext
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How Directory Committing Works:
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Each CDir has:
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version - current version of directory
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committing_version - which version was sent to stable storage
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last_committed_version - last version to be safely stored
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Each Inode has:
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parent_dir_version - what dir version i was in when i was dirtied. (*)
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(*) note that if you change an inode, mark_dirty() again, even if it's already dirty!
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How committing works:
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A call to commit_dir(dir, context) will ensure tha the _current_ version is stored safely on disk before the context is finished.
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When a commit completes, inodes in the directory are checked. If they are dirty and belonged to the _committed_ (or earlier) version, then they are marked clean. If they belong to a newer version, then they are _still dirty_.
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