History

jsteemann b1aae2efdd remove unused options		2017-05-12 12:12:09 +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	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesCollection.h	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesCollectionExport.cpp	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesCollectionExport.h	…
MMFilesCollectionKeys.cpp	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesCollectionKeys.h	…
MMFilesCollectionReadLocker.h	honor exclusive locks	2017-04-25 12:56:56 +02:00
MMFilesCollectionWriteLocker.h	honor exclusive locks	2017-04-25 12:56:56 +02:00
MMFilesCollectorCache.h	…
MMFilesCollectorThread.cpp	optimize away own transaction management for RocksDB engine	2017-05-04 23:16:53 +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	Various warnings	2017-04-26 11:26:08 +02:00
MMFilesDatafile.h	…
MMFilesDatafileHelper.h	…
MMFilesDatafileStatistics.cpp	…
MMFilesDatafileStatistics.h	…
MMFilesDatafileStatisticsContainer.cpp	…
MMFilesDatafileStatisticsContainer.h	…
MMFilesDitch.cpp	…
MMFilesDitch.h	…
MMFilesDocumentOperation.cpp	…
MMFilesDocumentOperation.h	…
MMFilesDocumentPosition.h	…
MMFilesEdgeIndex.cpp	fix crashes	2017-04-25 15:47:11 +02:00
MMFilesEdgeIndex.h	fix crashes	2017-04-25 15:47:11 +02:00
MMFilesEngine.cpp	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesEngine.h	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesExportCursor.cpp	…
MMFilesExportCursor.h	…
MMFilesFulltextIndex.cpp	Geo index update, renaming	2017-05-11 13:19:51 +02:00
MMFilesFulltextIndex.h	Fixing fulltext deduplication	2017-05-10 16:17:46 +02:00
MMFilesGeoIndex.cpp	…
MMFilesGeoIndex.h	…
MMFilesHashIndex.cpp	fix crashes	2017-04-25 15:47:11 +02:00
MMFilesHashIndex.h	fix crashes	2017-04-25 15:47:11 +02:00
MMFilesIndexElement.cpp	…
MMFilesIndexElement.h	…
MMFilesIndexFactory.cpp	Removed code paths that wrote objectIds into the Agency. This did break replication.	2017-05-02 14:59:19 +02:00
MMFilesIndexFactory.h	Removed code paths that wrote objectIds into the Agency. This did break replication.	2017-05-02 14:59:19 +02:00
MMFilesInitialSync.h	move engine specific syncer code into engines	2017-05-02 16:36:27 +02:00
MMFilesLogfileManager.cpp	optimize away own transaction management for RocksDB engine	2017-05-04 23:16:53 +02:00
MMFilesLogfileManager.h	optimize away own transaction management for RocksDB engine	2017-05-04 23:16:53 +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	…
MMFilesPathBasedIndex.h	…
MMFilesPersistentIndex.cpp	…
MMFilesPersistentIndex.h	…
MMFilesPersistentIndexFeature.cpp	remove unused options	2017-05-12 12:12:09 +02:00
MMFilesPersistentIndexFeature.h	…
MMFilesPersistentIndexKeyComparator.cpp	…
MMFilesPersistentIndexKeyComparator.h	…
MMFilesPrimaryIndex.cpp	fixes for non-array IN lookups, added tests	2017-04-25 01:47:07 +02:00
MMFilesPrimaryIndex.h	…
MMFilesRemoverThread.cpp	…
MMFilesRemoverThread.h	…
MMFilesRestExportHandler.cpp	…
MMFilesRestExportHandler.h	…
MMFilesRestHandlers.cpp	…
MMFilesRestHandlers.h	…
MMFilesRestReplicationHandler.cpp	removing unused and unimplemented methods	2017-05-10 18:25:41 +02:00
MMFilesRestReplicationHandler.h	more dictributeShardsLike code mergedfrom 3.1	2017-04-24 15:13:40 +02:00
MMFilesRestWalHandler.cpp	…
MMFilesRestWalHandler.h	…
MMFilesRevisionsCache.cpp	…
MMFilesRevisionsCache.h	…
MMFilesSkiplist.h	…
MMFilesSkiplistIndex.cpp	fix gcc 4.9 compilation issue	2017-04-24 11:25:10 +02:00
MMFilesSkiplistIndex.h	…
MMFilesSynchronizerThread.cpp	…
MMFilesSynchronizerThread.h	…
MMFilesToken.h	…
MMFilesTransactionCollection.cpp	turn off deadlock detector in obvious cases in which it is not necessary	2017-04-27 14:47:19 +02:00
MMFilesTransactionCollection.h	…
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	…
MMFilesTransactionState.h	…
MMFilesV8Functions.cpp	fix db._engineStats()	2017-05-04 00:33:36 +02:00
MMFilesV8Functions.h	fix db._engineStats()	2017-05-04 00:33:36 +02:00
MMFilesView.cpp	…
MMFilesView.h	…
MMFilesWalLogfile.cpp	…
MMFilesWalLogfile.h	…
MMFilesWalMarker.h	…
MMFilesWalRecoverState.cpp	…
MMFilesWalRecoverState.h	…
MMFilesWalRecoveryFeature.cpp	try to fix startup order	2017-04-25 11:14:10 +02:00
MMFilesWalRecoveryFeature.h	…
MMFilesWalSlot.cpp	…
MMFilesWalSlot.h	…
MMFilesWalSlots.cpp	…
MMFilesWalSlots.h	…
MMFilesWalSyncRegion.h	…
README.md	…
mmfiles-fulltext-common.h	…
mmfiles-fulltext-handles.cpp	…
mmfiles-fulltext-handles.h	…
mmfiles-fulltext-index.cpp	cppcheck	2017-05-10 18:24:34 +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	added more marker types	2017-04-26 11:15:33 +02:00
mmfiles-replication-dump.h	…

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.