Add backward compatible option in GetLiveFiles to choose whether to not Flush first

Summary:
As explained in comments in GetLiveFiles in db.h, this option will cause flush to be skipped in GetLiveFiles because some use-cases use GetSortedWalFiles after GetLiveFiles to generate more complete snapshots.
Using GetSortedWalFiles after GetLiveFiles allows us to not Flush in GetLiveFiles first because wals have everything.
Note: file deletions will be disabled before calling GLF or GSWF so live logs will not move to archive logs or get delted.
Note: Manifest file is truncated to a proper value in GLF, so it will always reply from the proper wal files on a restart

Test Plan: make

Reviewers: dhruba, haobo

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D13257
This commit is contained in:
Mayank Agarwal
2013-10-03 14:38:32 -07:00
parent 200c05a23f
commit 854d236361
8 changed files with 32 additions and 17 deletions

View File

@@ -133,9 +133,9 @@ class StackableDB : public DB {
return sdb_->EnableFileDeletions();
}
virtual Status GetLiveFiles(std::vector<std::string>& vec, uint64_t* mfs)
override {
return sdb_->GetLiveFiles(vec, mfs);
virtual Status GetLiveFiles(std::vector<std::string>& vec, uint64_t* mfs,
bool flush_memtable = true) override {
return sdb_->GetLiveFiles(vec, mfs, flush_memtable);
}
virtual SequenceNumber GetLatestSequenceNumber() override {