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Kirill Smelkov
wendelin.core
Commits
44a2e6db
Commit
44a2e6db
authored
Sep 23, 2021
by
Kirill Smelkov
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-161
wcfs/internal/xbtree/treediff.go
wcfs/internal/xbtree/treediff.go
+189
-158
wcfs/internal/xbtree/δbtail.go
wcfs/internal/xbtree/δbtail.go
+3
-3
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wcfs/internal/xbtree/treediff.go
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wcfs/internal/xbtree/δbtail.go
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@@ -38,7 +38,7 @@ package xbtree
// users, which are expected to call ΔBtail.Track(treepath) to let ΔBtail know
// that such and such ZODB objects constitute a path from root of a tree to some
// of its leaf. After Track call the objects from the path and tree keys, that
//
we
re covered by leaf node, become tracked: from now-on ΔBtail will detect
//
a
re covered by leaf node, become tracked: from now-on ΔBtail will detect
// and provide BTree-level changes caused by any change of tracked tree objects
// or tracked keys. This guarantee can be provided because ΔBtail now knows
// that such and such objects belong to a particular tree.
...
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@@ -54,8 +54,8 @@ package xbtree
//
// A new Track request potentially grows tracked keys coverage. Due to this,
// ΔBtail needs to recompute potentially whole vδT of the affected tree. This
// recomputation is managed by
rebuild* family of functions and uses the sam
e
// treediff algorithm, that Update is using, but modulo PPTreeSubSet
// recomputation is managed by
"rebuild..." family of functions and uses th
e
//
same
treediff algorithm, that Update is using, but modulo PPTreeSubSet
// corresponding to δ key coverage. Update also potentially needs to rebuild
// whole vδT history, not only append new δT, because a change to tracked tree
// nodes can result in growth of tracked key coverage.
...
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