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dirstate-v2: Change the on-disk format to be tree-shaped
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Authored by SimonSapin on May 17 2021, 6:06 AM.

Details

Summary

Nodes are stored not only for tracked files but also for their ancestor
directories. A node has "pointers" (byte count from the start of the file)
to its direct child nodes. Everything can be accessed with zero copy.

Diff Detail

Repository
rHG Mercurial
Branch
default
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Unit
No Unit Test Coverage

Event Timeline

SimonSapin created this revision.May 17 2021, 6:06 AM
baymax updated this revision to Diff 28002.May 17 2021, 8:39 AM

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Alphare accepted this revision.May 19 2021, 6:19 AM
Alphare added a subscriber: Alphare.
Alphare added inline comments.
rust/hg-core/src/dirstate_tree/dirstate_map.rs
36

4 billion files is not webscale ;)

rust/hg-core/src/dirstate_tree/on_disk.rs
241

This will be done differently when we move to an append-only format anyway, no need to worry about it.

This revision is now accepted and ready to land.May 19 2021, 6:19 AM
baymax updated this revision to Diff 28103.May 19 2021, 7:41 AM

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