[Fact]
        public void aa()
        {
            var dir = @"c:\dev\cloud\bugy\BTDBrollback\oms500test\Diagnostic_0\";
            using (var fileCollection = new OnDiskFileCollection(dir))
            {
                var options = new KeyValueDBOptions
                {
                    Compression = new SnappyCompressionStrategy(),
                    FileCollection = fileCollection,
                    FileSplitSize = 100 * 1024 * 1024,
                    OpenUpToCommitUlong = 151,
                    PreserveHistoryUpToCommitUlong = 151,
                    CompactorScheduler = CompactorScheduler.Instance,
                };

                using (var kvDb = new KeyValueDB(options))
                using (var objDb = new ObjectDB())
                {
                    objDb.Open(kvDb, false);

                    using (var tr = objDb.StartReadOnlyTransaction())
                    {
                        Assert.Equal(tr.GetCommitUlong(), 151UL);
                    }
                }
            }
        }