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Move level0 sorting logic from Version::SaveTo() to Version::Finalize()

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Summary: I realized that "D14409 Avoid sorting in Version::Get() by presorting them in VersionSet::Builder::SaveTo()" is not done in an optimized place. SaveTo() is usually inside mutex. Move it to Finalize(), which is called out of mutex.

Test Plan: make all check

Reviewers: dhruba, haobo, kailiu

Reviewed By: dhruba

CC: igor, leveldb

Differential Revision: https://reviews.facebook.net/D14607
This commit is contained in:
Siying Dong 2013-12-11 15:40:22 -08:00
parent a8b8b11dc4
commit 14995a8ff3
1 changed files with 6 additions and 6 deletions
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12
db/version_set.cc
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@ -1110,12 +1110,6 @@ class VersionSet::Builder {
MaybeAddFile(v, level, *base_iter);
}
}
// Pre-sort level0 for Get()
if (vset_->options_->compaction_style == kCompactionStyleUniversal) {
std::sort(v->files_[0].begin(), v->files_[0].end(), NewestFirstBySeqNo);
} else {
std::sort(v->files_[0].begin(), v->files_[0].end(), NewestFirst);
}
CheckConsistency(v);
}
@ -1681,6 +1675,12 @@ void VersionSet::MarkFileNumberUsed(uint64_t number) {
void VersionSet::Finalize(Version* v,
std::vector<uint64_t>& size_being_compacted) {
// Pre-sort level0 for Get()
if (options_->compaction_style == kCompactionStyleUniversal) {
std::sort(v->files_[0].begin(), v->files_[0].end(), NewestFirstBySeqNo);
} else {
std::sort(v->files_[0].begin(), v->files_[0].end(), NewestFirst);
}
double max_score = 0;
int max_score_level = 0;