public WriteAheadJournal(StorageEnvironment env) { _env = env; _dataPager = _env.Options.DataPager; _currentJournalFileSize = env.Options.InitialLogFileSize; _headerAccessor = env.HeaderAccessor; _updateLogInfo = header => { var journalFilesCount = _files.Count; header->Journal.CurrentJournal = journalFilesCount > 0 ? _journalIndex : -1; header->Journal.JournalFilesCount = journalFilesCount; header->IncrementalBackup.LastCreatedJournal = _journalIndex; }; _compressionPager = _env.Options.CreateScratchPager("compression.buffers"); _journalApplicator = new JournalApplicator(this); }