History

Frank Celler a5a25754ed Feature/reduce extraction to projection (#2792 ) * reduce extractions to projections * recycle string buffers in SocketTask * micro optimizations for mmfiles indexes * added special lookup function for _key * moved function into the correct file * speed up key buffer allocations a bit * added noexcept specifier * correctly name variable * explicitly move bounds * fix and speedup from/toPersistent functions * reuse string from ManagedDocumentResult for multiple lookups * use move-assign * a bit less work for single server * speedup AQL function HASH * single fetch optimization * performance optimization for the case when no documents need to be returned * make reduce-extraction-to-projection a RocksDB-only optimizer rule * cppcheck * try to fix compile error on MacOS * bug fix for MacOSX * missing namespace (in Windows compile)		2017-07-14 08:40:29 +02:00
..
CMakeLists.txt	optimize away own transaction management for RocksDB engine	2017-05-04 23:16:53 +02:00
MMFilesAllocatorThread.cpp	…
MMFilesAllocatorThread.h	…
MMFilesAqlFunctions.cpp	…
MMFilesAqlFunctions.h	…
MMFilesCleanupThread.cpp	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesCleanupThread.h	…
MMFilesCollection.cpp	Feature/reduce extraction to projection (#2792 )	2017-07-14 08:40:29 +02:00
MMFilesCollection.h	Feature/reduce extraction to projection (#2792 )	2017-07-14 08:40:29 +02:00
MMFilesCollectionExport.cpp	move common code into its own file	2017-05-22 17:46:12 +02:00
MMFilesCollectionExport.h	move common code into its own file	2017-05-22 17:46:12 +02:00
MMFilesCollectionKeys.cpp	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesCollectionKeys.h	…
MMFilesCollectionReadLocker.h	…
MMFilesCollectionWriteLocker.h	…
MMFilesCollectorCache.h	…
MMFilesCollectorThread.cpp	Bug fix/small issues (#2696 )	2017-07-01 00:30:45 +02:00
MMFilesCollectorThread.h	…
MMFilesCompactionLocker.h	…
MMFilesCompactorThread.cpp	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesCompactorThread.h	…
MMFilesDatafile.cpp	do not include our datafiles in core files (#2630 )	2017-06-22 12:34:27 +02:00
MMFilesDatafile.h	fix WAL file tick updating (happened too late before) (#2762 )	2017-07-10 17:41:08 +02:00
MMFilesDatafileHelper.h	…
MMFilesDatafileStatistics.cpp	…
MMFilesDatafileStatistics.h	…
MMFilesDatafileStatisticsContainer.cpp	…
MMFilesDatafileStatisticsContainer.h	…
MMFilesDitch.cpp	…
MMFilesDitch.h	…
MMFilesDocumentOperation.cpp	…
MMFilesDocumentOperation.h	…
MMFilesDocumentPosition.h	…
MMFilesEdgeIndex.cpp	cleanup error codes a bit	2017-06-09 14:50:05 +02:00
MMFilesEdgeIndex.h	Changed several index/collection APIs to provide better context messages.	2017-06-06 12:27:08 -04:00
MMFilesEngine.cpp	change init order of mmfiles logfile manager and database feature (#2697 )	2017-07-01 08:47:57 +02:00
MMFilesEngine.h	Feature/reduce extraction to projection (#2792 )	2017-07-14 08:40:29 +02:00
MMFilesExportCursor.cpp	move common code into its own file	2017-05-22 17:46:12 +02:00
MMFilesExportCursor.h	…
MMFilesFulltextIndex.cpp	unify index struct return values in cluster and non-cluster for fulltext and geo indexes (#2534 )	2017-06-08 13:35:00 +02:00
MMFilesFulltextIndex.h	Changed several index/collection APIs to provide better context messages.	2017-06-06 12:27:08 -04:00
MMFilesGeoIndex.cpp	Changed several index/collection APIs to provide better context messages.	2017-06-06 12:27:08 -04:00
MMFilesGeoIndex.h	Changed several index/collection APIs to provide better context messages.	2017-06-06 12:27:08 -04:00
MMFilesHashIndex.cpp	Feature/reduce extraction to projection (#2792 )	2017-07-14 08:40:29 +02:00
MMFilesHashIndex.h	Changed several index/collection APIs to provide better context messages.	2017-06-06 12:27:08 -04:00
MMFilesIncrementalSync.h	Bug fix/adjust agency comm timeouts (#2765 )	2017-07-13 00:44:28 +02:00
MMFilesIndexElement.cpp	…
MMFilesIndexElement.h	…
MMFilesIndexFactory.cpp	Feature/reduce extraction to projection (#2792 )	2017-07-14 08:40:29 +02:00
MMFilesIndexFactory.h	…
MMFilesLogfileManager.cpp	Feature/reduce extraction to projection (#2792 )	2017-07-14 08:40:29 +02:00
MMFilesLogfileManager.h	change init order of mmfiles logfile manager and database feature (#2697 )	2017-07-01 08:47:57 +02:00
MMFilesOptimizerRules.cpp	Working geo index + tests	2017-05-09 15:04:51 +02:00
MMFilesOptimizerRules.h	Working geo index + tests	2017-05-09 15:04:51 +02:00
MMFilesPathBasedIndex.cpp	added "deduplicate" attribute for array indexes (#2644 )	2017-06-30 17:53:50 +02:00
MMFilesPathBasedIndex.h	added "deduplicate" attribute for array indexes (#2644 )	2017-06-30 17:53:50 +02:00
MMFilesPersistentIndex.cpp	added "deduplicate" attribute for array indexes (#2644 )	2017-06-30 17:53:50 +02:00
MMFilesPersistentIndex.h	Changed several index/collection APIs to provide better context messages.	2017-06-06 12:27:08 -04:00
MMFilesPersistentIndexFeature.cpp	Bug fix/fix rocksdb options (#2702 )	2017-07-02 23:13:42 +02:00
MMFilesPersistentIndexFeature.h	…
MMFilesPersistentIndexKeyComparator.cpp	…
MMFilesPersistentIndexKeyComparator.h	…
MMFilesPrimaryIndex.cpp	Changed several index/collection APIs to provide better context messages.	2017-06-06 12:27:08 -04:00
MMFilesPrimaryIndex.h	Changed several index/collection APIs to provide better context messages.	2017-06-06 12:27:08 -04:00
MMFilesRemoverThread.cpp	…
MMFilesRemoverThread.h	…
MMFilesRestExportHandler.cpp	move common code into its own file	2017-05-22 17:46:12 +02:00
MMFilesRestExportHandler.h	move common code into its own file	2017-05-22 17:46:12 +02:00
MMFilesRestHandlers.cpp	…
MMFilesRestHandlers.h	…
MMFilesRestReplicationHandler.cpp	Bug fix/adjust agency comm timeouts (#2765 )	2017-07-13 00:44:28 +02:00
MMFilesRestReplicationHandler.h	…
MMFilesRestWalHandler.cpp	issue #2505	2017-05-29 10:29:47 +02:00
MMFilesRestWalHandler.h	…
MMFilesRevisionsCache.cpp	…
MMFilesRevisionsCache.h	…
MMFilesSkiplist.h	…
MMFilesSkiplistIndex.cpp	Feature/reduce extraction to projection (#2792 )	2017-07-14 08:40:29 +02:00
MMFilesSkiplistIndex.h	Changed several index/collection APIs to provide better context messages.	2017-06-06 12:27:08 -04:00
MMFilesSynchronizerThread.cpp	…
MMFilesSynchronizerThread.h	…
MMFilesToken.h	…
MMFilesTransactionCollection.cpp	slightly less allocations for MMFiles transaction ops	2017-06-07 00:30:18 +02:00
MMFilesTransactionCollection.h	slightly less allocations for MMFiles transaction ops	2017-06-07 00:30:18 +02:00
MMFilesTransactionContextData.cpp	…
MMFilesTransactionContextData.h	…
MMFilesTransactionManager.cpp	optimize away own transaction management for RocksDB engine	2017-05-04 23:16:53 +02:00
MMFilesTransactionManager.h	optimize away own transaction management for RocksDB engine	2017-05-04 23:16:53 +02:00
MMFilesTransactionState.cpp	improve waitForSync performance for mmfiles	2017-06-06 12:44:39 +02:00
MMFilesTransactionState.h	added tests for intermediate commits	2017-05-30 12:03:58 +02:00
MMFilesV8Functions.cpp	…
MMFilesV8Functions.h	…
MMFilesView.cpp	…
MMFilesView.h	…
MMFilesWalLogfile.cpp	…
MMFilesWalLogfile.h	…
MMFilesWalMarker.h	…
MMFilesWalRecoverState.cpp	Added recovery tests for views and fixed a few related bugs. (#2682 )	2017-06-29 17:09:43 +02:00
MMFilesWalRecoverState.h	…
MMFilesWalRecoveryFeature.cpp	…
MMFilesWalRecoveryFeature.h	…
MMFilesWalSlot.cpp	fix WAL file tick updating (happened too late before) (#2762 )	2017-07-10 17:41:08 +02:00
MMFilesWalSlot.h	fix WAL file tick updating (happened too late before) (#2762 )	2017-07-10 17:41:08 +02:00
MMFilesWalSlots.cpp	fix WAL file tick updating (happened too late before) (#2762 )	2017-07-10 17:41:08 +02:00
MMFilesWalSlots.h	fix WAL file tick updating (happened too late before) (#2762 )	2017-07-10 17:41:08 +02:00
MMFilesWalSyncRegion.h	…
README.md	…
mmfiles-fulltext-common.h	…
mmfiles-fulltext-handles.cpp	…
mmfiles-fulltext-handles.h	…
mmfiles-fulltext-index.cpp	fix invalid new/free pairings	2017-06-07 13:21:41 +02:00
mmfiles-fulltext-index.h	cppcheck	2017-05-10 18:24:34 +02:00
mmfiles-fulltext-list.cpp	…
mmfiles-fulltext-list.h	…
mmfiles-fulltext-query.cpp	…
mmfiles-fulltext-query.h	…
mmfiles-fulltext-result.cpp	…
mmfiles-fulltext-result.h	…
mmfiles-geo-index.cpp	…
mmfiles-geo-index.h	…
mmfiles-replication-dump.cpp	Squashed commit of the following:	2017-05-12 23:22:22 +02:00
mmfiles-replication-dump.h	Bug fix/cleanup stuff (#2734 )	2017-07-05 19:34:16 +02:00

README.md

MMFilesEngine

How operations are stored - Overview

All operations like insert or remove are written as markers to a write ahead log (WAL). This WAL consists of files of a certain size and if such a file is full (or is manually flushed), all relevant markers are transferred (transferMarkers()) to the journals of the respective collections. During the transfer any obsolete markers will be thrown away: a sequence of insert, remove, insert on the same document will result in the last insert discarding the previous operations. When a journal file of size (journalSize()) is full, it will be sealed and renamed. By applying these operations it will become a datafile that is read-only. Datafiles will eventually be merged by a compactor thread that does about the same work as the transferMarkers function, reducing the size of the stored data.

Ditches

Ditches are used to pin objects in WAL or journal as long as they are used by other operations.