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-rw-r--r--src/leveldb/db/version_set.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/leveldb/db/version_set.h b/src/leveldb/db/version_set.h
index 9d084fdb7d..20de0e2629 100644
--- a/src/leveldb/db/version_set.h
+++ b/src/leveldb/db/version_set.h
@@ -78,6 +78,12 @@ class Version {
// REQUIRES: lock is held
bool UpdateStats(const GetStats& stats);
+ // Record a sample of bytes read at the specified internal key.
+ // Samples are taken approximately once every config::kReadBytesPeriod
+ // bytes. Returns true if a new compaction may need to be triggered.
+ // REQUIRES: lock is held
+ bool RecordReadSample(Slice key);
+
// Reference count management (so Versions do not disappear out from
// under live iterators)
void Ref();
@@ -114,6 +120,15 @@ class Version {
class LevelFileNumIterator;
Iterator* NewConcatenatingIterator(const ReadOptions&, int level) const;
+ // Call func(arg, level, f) for every file that overlaps user_key in
+ // order from newest to oldest. If an invocation of func returns
+ // false, makes no more calls.
+ //
+ // REQUIRES: user portion of internal_key == user_key.
+ void ForEachOverlapping(Slice user_key, Slice internal_key,
+ void* arg,
+ bool (*func)(void*, int, FileMetaData*));
+
VersionSet* vset_; // VersionSet to which this Version belongs
Version* next_; // Next version in linked list
Version* prev_; // Previous version in linked list