Jay Zhuang

Would exposing `DBImpl::WaitForCompact()` as a public API help? (currently it's for internal test only). Or is there any other requirement? https://github.com/facebook/rocksdb/blob/27f3af596609f3b86af5080cc870c869e836e7f2/db/db_impl/db_impl.h#L1032-L1035

Yes, it will wait for flush too.

Updated to #10562

@Longarithm make sense, either print it separately or using ostream to buffer. Are you interested in contributing a PR?

> Everything works fine when we iterate through the new database. But when it comes to the problematic database, we always lose data between xxx100 and xxx1001. does the issue...