martini
Reputation: 3
Ensembles: unnecessary round-trip(s) when syncing with CloudKit file system
I have integrated Ensembles v2.5 into my App and I am using the CloudKit file system. Merges are triggered automatically via push notifications as described in the Ensembles documentation.
In general syncing works, but my problem is that after a change is synced via CloudKit to the 2nd device, the 2nd device seems to upload new transaction logs to CloudKit which triggers another merge (via push notification) on the 1st device. Sometimes another merge is followed on the 2nd device, resulting in two unnecessary merges.
A practical example:
1) device 1 (iPad) makes a change
2) changes propagate to CloudKit
3) push notification triggers merge on device 2 (iPod Touch)
iPad and iPod Touch have the same data now and no more merges should occur, but:
4) iPod Touch creates new transaction logs
5) push notification triggers merge on iPad
6) iPad creates new transaction logs
7) push notification triggers merge iPod Touch
Here is the Ensembles trace on device 2 (iPod Touch)
18:16:28.202 Enqueuing merge <<< -[CDEPersistentStoreEnsemble mergeWithOptions:completion:]
18:16:28.215 Beginning merge <<< __47-[CDEPersistentStoreEnsemble newMergeSetupStep]_block_invoke
18:16:28.234 Priming CloudKit cache <<< -[CDECloudKitFileSystem primeForActivityWithCompletion:]
18:16:28.235 Beginning change processing for CloudKit. <<< -[CDECloudKitFileSystem primeForActivityWithCompletion:]
18:16:28.872 Processed cloudkit change (insert/update): /DemoAppMainStore/events/33_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_21.cdeevent <<< __56-[CDECloudKitFileSystem primeForActivityWithCompletion:]_block_invoke
18:16:28.876 Completing CloudKit fetch record changes <<< __56-[CDECloudKitFileSystem primeForActivityWithCompletion:]_block_invoke.311
18:16:28.887 Checking identity in cloud system <<< -[CDEPersistentStoreEnsemble checkCloudFileSystemIdentityWithCompletion:]
18:16:29.314 Passed identity check with identity: <CKRecordID: 0x1660a840; _7fd2f6a37e22282e02a1d8fb52ba2d8e:(_defaultZone:__defaultOwner__)> <<< __73-[CDEPersistentStoreEnsemble checkCloudFileSystemIdentityWithCompletion:]_block_invoke
18:16:29.324 Checking registration info <<< -[CDEPersistentStoreEnsemble checkStoreRegistrationInCloudWithCompletion:]
18:16:29.325 Checking existence of registration info <<< -[CDECloudManager checkExistenceOfRegistrationInfoForStoreWithIdentifier:completion:]
18:16:29.326 Checking existence of file: /DemoAppMainStore/stores/0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA <<< -[CDECloudKitFileSystem fileExistsAtPath:completion:]
18:16:29.329 Retrieving records for paths: (
"/DemoAppMainStore/stores/0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA"
) <<< -[CDECloudKitFileSystem fetchRecordsAtPaths:completion:]
18:16:29.330 File exists. Is dir? 0 <<< __53-[CDECloudKitFileSystem fileExistsAtPath:completion:]_block_invoke
18:16:29.343 Localizable string "(A Document Being Saved By %@)" not found in strings table "Document" of bundle CFBundle 0x166429d0 </System/Library/Frameworks/Foundation.framework> (not loaded).
18:16:29.380 Getting contents of directory at path: /DemoAppMainStore/baselines <<< -[CDECloudKitFileSystem contentsOfDirectoryAtPath:completion:]
18:16:29.383 Getting contents of directory at path: /DemoAppMainStore/events <<< -[CDECloudKitFileSystem contentsOfDirectoryAtPath:completion:]
18:16:29.386 Getting contents of directory at path: /DemoAppMainStore/data <<< -[CDECloudKitFileSystem contentsOfDirectoryAtPath:completion:]
18:16:29.394 Removing incomplete remote file sets <<< -[CDECloudManager removeLocallyProducedIncompleteRemoteFileSets:]
18:16:29.447 Transferring new data files from cloud to event store <<< -[CDECloudManager importNewDataFilesWithProgress:]
18:16:29.459 Transferring new baselines from cloud to event store <<< -[CDECloudManager importNewBaselineEventsWithProgress:]
18:16:29.486 Consolidating baselines <<< -[CDEBaselineConsolidator consolidateBaselineWithCompletion:]
18:16:29.498 Found baselines with unique ids: (
"848B3010-D3D0-4928-BFA9-249D2CE617A0-777-000002E2704C7408"
) <<< __61-[CDEBaselineConsolidator consolidateBaselineWithCompletion:]_block_invoke
18:16:29.499 Baselines remaining that need merging: 1 <<< __61-[CDEBaselineConsolidator consolidateBaselineWithCompletion:]_block_invoke
18:16:29.501 Finishing baseline consolidation <<< __61-[CDEBaselineConsolidator consolidateBaselineWithCompletion:]_block_invoke_2
18:16:29.506 Transferring new events from cloud to event store <<< -[CDECloudManager importNewRemoteNonBaselineEventsWithProgress:]
18:16:29.588 Downloading files to transit cache: (
"/DemoAppMainStore/events/33_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_21.cdeevent"
) <<< __83-[CDECloudManager downloadFiles:fromRemoteDirectory:batchCompletionBlock:progress:]_block_invoke_2
18:16:29.591 Downloading from paths (
"/DemoAppMainStore/events/33_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_21.cdeevent"
) to path (
"/var/mobile/Containers/Data/Application/3EA6BB44-7135-4C5D-91D3-D36878005B1C/Library/Application Support/ch.appzoo.DemoApp/com.mentalfaculty.ensembles.eventdata/transitcache/DemoAppMainStore/download/33_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_21.cdeevent"
) <<< -[CDECloudKitFileSystem downloadFromPaths:toLocalFiles:completion:]
18:16:32.120 Migrating event in to event store from files: (
"33_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_21.cdeevent"
) <<< __84-[CDECloudManager migrateNewEventsWhichAreBaselines:fromTransitCacheWithCompletion:]_block_invoke.292
18:16:32.121 Migrating events in from files <<< -[CDEEventMigrator migrateEventInFromFileURLs:completion:]
18:16:32.124 Migrating file events to event store <<< -[CDEEventImport main]
18:16:32.125 Importing file at URL: file:///var/mobile/Containers/Data/Application/3EA6BB44-7135-4C5D-91D3-D36878005B1C/Library/Application%20Support/ch.appzoo.DemoApp/com.mentalfaculty.ensembles.eventdata/transitcache/DemoAppMainStore/download/33_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_21.cdeevent <<< __22-[CDEEventImport main]_block_invoke.22
18:16:32.382 Determining events to include in integration <<< -[CDEEventIntegrator storeModificationEventIDsForIntegration:]
18:16:32.546 Including these events in the integration: (
"<CDEStoreModificationEvent: 0x167b3590> (entity: CDEStoreModificationEvent; id: 0x167d6720 <x-coredata://7EC8021F-B83B-4A27-B9B9-D1645A533448/CDEStoreModificationEvent/p37> ; data: {\n eventRevision = \"0x167a7280 <x-coredata://7EC8021F-B83B-4A27-B9B9-D1645A533448/CDEEventRevision/p72>\";\n eventRevisionsOfOtherStores = (\n \"0x167ddf40 <x-coredata://7EC8021F-B83B-4A27-B9B9-D1645A533448/CDEEventRevision/p71>\"\n );\n globalCount = 32;\n modelVersion = \"<?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?>\\n<!DOCTYPE plist PUBLIC \\\"-//Apple//DTD PLIST 1.0//EN\\\" \\\"http://www.apple.com/DTDs/PropertyList-1.0.dtd\\\">\\n<plist version=\\\"1.0\\\">\\n<dict>\\n\\t<key>DMBuddy</key>\\n\\t<data>\\n\\t\";\n objectChanges = \"<relationship fault: 0x17878a60 'objectChanges'>\";\n timestamp = \"16:49:55 +0000\";\n type = 300;\n uniqueIdentifier = \"E432A13E-3825-4833-A306-F84044492252-498-0000010ED9BE7E88\";\n})",
"<CDEStoreModificationEvent: 0x167b3620> (entity: CDEStoreModificationEvent; id: 0x16730ac0 <x-coredata://7EC8021F-B83B-4A27-B9B9-D1645A533448/CDEStoreModificationEvent/p38> ; data: {\n eventRevision = \"0x166b4420 <x-coredata://7EC8021F-B83B-4A27-B9B9-D1645A533448/CDEEventRevision/p73>\";\n eventRevisionsOfOtherStores = (\n \"0x167ecb10 <x-coredata://7EC8021F-B83B-4A27-B9B9-D1645A533448/CDEEventRevision/p74>\"\n );\n globalCount = 33;\n modelVersion = \"<?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?>\\n<!DOCTYPE plist PUBLIC \\\"-//Apple//DTD PLIST 1.0//EN\\\" \\\"http://www.apple.com/DTDs/PropertyList-1.0.dtd\\\">\\n<plist version=\\\"1.0\\\">\\n<dict>\\n\\t<key>DMBuddy</key>\\n\\t<data>\\n\\t\";\n objectChanges = \"<relationship fault: 0x1651f9a0 'objectChanges'>\";\n timestamp = \"17:16:23 +0000\";\n type = 200;\n uniqueIdentifier = \"83664AB6-F3FE-4454-B794-12858EB3215C-501-00000110A14995E1\";\n})"
) <<< __62-[CDEEventIntegrator storeModificationEventIDsForIntegration:]_block_invoke
18:16:32.550 Checking which events can be integrated <<< -[CDEEventIntegrator integrableEventIDsFromEventIDs:informativeErrorCodes:]
18:16:32.554 Determining integrable events <<< -[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]
18:16:39.046 Checking store: 826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3 <<< __71-[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]_block_invoke
18:16:39.047 Revision range: store id: 826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3
revision: 20
global count: 32 store id: 826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3
revision: 21
global count: 33 <<< __71-[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]_block_invoke
18:16:39.098 Checking store: 0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA <<< __71-[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]_block_invoke
18:16:39.099 Revision range: store id: 0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA
revision: 15
global count: 32 store id: 0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA
revision: 15
global count: 33 <<< __71-[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]_block_invoke
18:16:39.131 Checking if ready for integration <<< -[CDEEventIntegrator integrationIsNeededForEventIDs:]
18:16:39.254 Beginning integration <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.256 Integrating entity: DMBuddy <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.267 Integrating entity: DMCertificate <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.287 Integrating entity: DMDiveLogEntry <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.309 Number of objects remaining to integrate for this entity: 0 <<< __46-[CDEEventIntegrator integrateEventIDs:error:]_block_invoke
18:16:39.431 Integrating entity: DMDiver <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.555 Integrating entity: DMEquipment <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.603 Integrating entity: DMPhoto <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.672 Integrating entity: DMPlace <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.765 Integrating entity: DMTagValue <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.784 Integrating entity: DMTankData <<< -[CDEEventIntegrator integrateEventIDs:error:]
18:16:39.851 Repairing context after integrating changes <<< -[CDEEventIntegrator repair:]
18:16:39.856 Committing merge changes to store <<< -[CDEEventIntegrator commit:]
18:16:39.863 Storing pre-save changes from updated objects <<< -[CDESaveMonitor storePreSaveChangesFromUpdatedObjects:]
18:16:40.045 Transferring data files from event store to cloud <<< -[CDECloudManager exportDataFilesWithProgress:]
18:16:40.094 Transferring baseline from event store to cloud <<< -[CDECloudManager exportNewLocalBaselineWithProgress:]
18:16:40.176 Transferring events from event store to cloud <<< -[CDECloudManager exportNewLocalNonBaselineEventsWithProgress:]
18:16:40.322 Migrating events out to files <<< -[CDEEventMigrator migrateStoreModificationEventWithObjectID:toTemporaryFilesWithCompletion:]
18:16:40.369 Exporting files for entity: DMBuddy <<< -[CDEEventExport main]
18:16:40.382 Exporting files for entity: DMCertificate <<< -[CDEEventExport main]
18:16:40.394 Exporting files for entity: DMDiveLogEntry <<< -[CDEEventExport main]
18:16:40.406 Exporting files for entity: DMDiver <<< -[CDEEventExport main]
18:16:40.414 Exporting files for entity: DMEquipment <<< -[CDEEventExport main]
18:16:40.423 Exporting files for entity: DMPhoto <<< -[CDEEventExport main]
18:16:40.431 Exporting files for entity: DMPlace <<< -[CDEEventExport main]
18:16:40.441 Exporting files for entity: DMTagValue <<< -[CDEEventExport main]
18:16:40.451 Exporting files for entity: DMTankData <<< -[CDEEventExport main]
18:16:40.485 Uploading files to remote path: (
"/DemoAppMainStore/events/34_0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA_16.cdeevent"
) <<< __73-[CDECloudManager transferFilesInTransitCacheToRemoteDirectory:progress:]_block_invoke_3
18:16:40.487 Uploading from paths (
"/var/mobile/Containers/Data/Application/3EA6BB44-7135-4C5D-91D3-D36878005B1C/Library/Application Support/ch.appzoo.DemoApp/com.mentalfaculty.ensembles.eventdata/transitcache/DemoAppMainStore/upload/34_0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA_16.cdeevent"
) to paths (
"/DemoAppMainStore/events/34_0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA_16.cdeevent"
) <<< -[CDECloudKitFileSystem uploadLocalFiles:toPaths:completion:]
18:16:42.525 Removing outdated files <<< -[CDECloudManager removeOutdatedRemoteFilesWithCompletion:]
18:16:42.607 Removing cloud files: <<< -[CDECloudManager removeOutdatedRemoteFilesWithCompletion:]
18:16:42.625 Removing items at paths: (
) <<< -[CDECloudKitFileSystem removeItemsAtPaths:completion:]
18:16:42.626 Retrieving records for paths: (
) <<< -[CDECloudKitFileSystem fetchRecordsAtPaths:completion:]
18:16:42.628 Fetched records for removal: (
) <<< __55-[CDECloudKitFileSystem removeItemsAtPaths:completion:]_block_invoke
18:16:42.630 Removing items with recordIDs: (
) <<< -[CDECloudKitFileSystem removeItemsWithRecordIDs:completion:]
18:16:42.651 Completing Merge <<< __58-[CDEPersistentStoreEnsemble mergeWithOptions:completion:]_block_invoke.694
18:16:48.068 Enqueuing merge <<< -[CDEPersistentStoreEnsemble mergeWithOptions:completion:]
18:16:48.082 Beginning merge <<< __47-[CDEPersistentStoreEnsemble newMergeSetupStep]_block_invoke
18:16:48.096 Priming CloudKit cache <<< -[CDECloudKitFileSystem primeForActivityWithCompletion:]
18:16:48.097 Beginning change processing for CloudKit. <<< -[CDECloudKitFileSystem primeForActivityWithCompletion:]
18:16:48.464 Processed cloudkit change (insert/update): /DemoAppMainStore/events/34_0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA_16.cdeevent <<< __56-[CDECloudKitFileSystem primeForActivityWithCompletion:]_block_invoke
18:16:48.474 Processed cloudkit change (insert/update): /DemoAppMainStore/events/35_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_22.cdeevent <<< __56-[CDECloudKitFileSystem primeForActivityWithCompletion:]_block_invoke
18:16:48.477 Completing CloudKit fetch record changes <<< __56-[CDECloudKitFileSystem primeForActivityWithCompletion:]_block_invoke.311
18:16:48.489 Checking identity in cloud system <<< -[CDEPersistentStoreEnsemble checkCloudFileSystemIdentityWithCompletion:]
18:16:48.884 Passed identity check with identity: <CKRecordID: 0x1660a840; _7fd2f6a37e22282e02a1d8fb52ba2d8e:(_defaultZone:__defaultOwner__)> <<< __73-[CDEPersistentStoreEnsemble checkCloudFileSystemIdentityWithCompletion:]_block_invoke
18:16:48.889 Checking registration info <<< -[CDEPersistentStoreEnsemble checkStoreRegistrationInCloudWithCompletion:]
18:16:48.890 Checking existence of registration info <<< -[CDECloudManager checkExistenceOfRegistrationInfoForStoreWithIdentifier:completion:]
18:16:48.891 Checking existence of file: /DemoAppMainStore/stores/0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA <<< -[CDECloudKitFileSystem fileExistsAtPath:completion:]
18:16:48.892 Retrieving records for paths: (
"/DemoAppMainStore/stores/0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA"
) <<< -[CDECloudKitFileSystem fetchRecordsAtPaths:completion:]
18:16:48.893 File exists. Is dir? 0 <<< __53-[CDECloudKitFileSystem fileExistsAtPath:completion:]_block_invoke
18:16:48.907 Localizable string "(A Document Being Saved By %@)" not found in strings table "Document" of bundle CFBundle 0x166429d0 </System/Library/Frameworks/Foundation.framework> (not loaded).
18:16:48.942 Getting contents of directory at path: /DemoAppMainStore/baselines <<< -[CDECloudKitFileSystem contentsOfDirectoryAtPath:completion:]
18:16:48.944 Getting contents of directory at path: /DemoAppMainStore/events <<< -[CDECloudKitFileSystem contentsOfDirectoryAtPath:completion:]
18:16:48.947 Getting contents of directory at path: /DemoAppMainStore/data <<< -[CDECloudKitFileSystem contentsOfDirectoryAtPath:completion:]
18:16:48.954 Removing incomplete remote file sets <<< -[CDECloudManager removeLocallyProducedIncompleteRemoteFileSets:]
18:16:49.016 Transferring new data files from cloud to event store <<< -[CDECloudManager importNewDataFilesWithProgress:]
18:16:49.028 Transferring new baselines from cloud to event store <<< -[CDECloudManager importNewBaselineEventsWithProgress:]
18:16:49.057 Consolidating baselines <<< -[CDEBaselineConsolidator consolidateBaselineWithCompletion:]
18:16:49.068 Found baselines with unique ids: (
"848B3010-D3D0-4928-BFA9-249D2CE617A0-777-000002E2704C7408"
) <<< __61-[CDEBaselineConsolidator consolidateBaselineWithCompletion:]_block_invoke
18:16:49.069 Baselines remaining that need merging: 1 <<< __61-[CDEBaselineConsolidator consolidateBaselineWithCompletion:]_block_invoke
18:16:49.071 Finishing baseline consolidation <<< __61-[CDEBaselineConsolidator consolidateBaselineWithCompletion:]_block_invoke_2
18:16:49.075 Transferring new events from cloud to event store <<< -[CDECloudManager importNewRemoteNonBaselineEventsWithProgress:]
18:16:49.150 Downloading files to transit cache: (
"/DemoAppMainStore/events/35_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_22.cdeevent"
) <<< __83-[CDECloudManager downloadFiles:fromRemoteDirectory:batchCompletionBlock:progress:]_block_invoke_2
18:16:49.153 Downloading from paths (
"/DemoAppMainStore/events/35_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_22.cdeevent"
) to path (
"/var/mobile/Containers/Data/Application/3EA6BB44-7135-4C5D-91D3-D36878005B1C/Library/Application Support/ch.appzoo.DemoApp/com.mentalfaculty.ensembles.eventdata/transitcache/DemoAppMainStore/download/35_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_22.cdeevent"
) <<< -[CDECloudKitFileSystem downloadFromPaths:toLocalFiles:completion:]
18:16:50.214 Migrating event in to event store from files: (
"35_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_22.cdeevent"
) <<< __84-[CDECloudManager migrateNewEventsWhichAreBaselines:fromTransitCacheWithCompletion:]_block_invoke.292
18:16:50.215 Migrating events in from files <<< -[CDEEventMigrator migrateEventInFromFileURLs:completion:]
18:16:50.218 Migrating file events to event store <<< -[CDEEventImport main]
18:16:50.219 Importing file at URL: file:///var/mobile/Containers/Data/Application/3EA6BB44-7135-4C5D-91D3-D36878005B1C/Library/Application%20Support/ch.appzoo.DemoApp/com.mentalfaculty.ensembles.eventdata/transitcache/DemoAppMainStore/download/35_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_22.cdeevent <<< __22-[CDEEventImport main]_block_invoke.22
18:16:50.456 Determining events to include in integration <<< -[CDEEventIntegrator storeModificationEventIDsForIntegration:]
18:16:50.600 Including these events in the integration: (
"<CDEStoreModificationEvent: 0x178b45e0> (entity: CDEStoreModificationEvent; id: 0x165342e0 <x-coredata://7EC8021F-B83B-4A27-B9B9-D1645A533448/CDEStoreModificationEvent/p40> ; data: {\n eventRevision = \"0x178a4cc0 <x-coredata://7EC8021F-B83B-4A27-B9B9-D1645A533448/CDEEventRevision/p77>\";\n eventRevisionsOfOtherStores = (\n \"0x178a4cd0 <x-coredata://7EC8021F-B83B-4A27-B9B9-D1645A533448/CDEEventRevision/p78>\"\n );\n globalCount = 35;\n modelVersion = \"<?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?>\\n<!DOCTYPE plist PUBLIC \\\"-//Apple//DTD PLIST 1.0//EN\\\" \\\"http://www.apple.com/DTDs/PropertyList-1.0.dtd\\\">\\n<plist version=\\\"1.0\\\">\\n<dict>\\n\\t<key>DMBuddy</key>\\n\\t<data>\\n\\t\";\n objectChanges = \"<relationship fault: 0x1651e8d0 'objectChanges'>\";\n timestamp = \"17:16:45 +0000\";\n type = 300;\n uniqueIdentifier = \"3F19C4EE-816D-425F-99BC-BE991EEE1476-501-00000110C03D4133\";\n})"
) <<< __62-[CDEEventIntegrator storeModificationEventIDsForIntegration:]_block_invoke
18:16:50.601 Checking which events can be integrated <<< -[CDEEventIntegrator integrableEventIDsFromEventIDs:informativeErrorCodes:]
18:16:50.603 Determining integrable events <<< -[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]
18:16:54.843 Checking store: 826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3 <<< __71-[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]_block_invoke
18:16:54.845 Revision range: store id: 826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3
revision: 22
global count: 35 store id: 826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3
revision: 22
global count: 35 <<< __71-[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]_block_invoke
18:16:54.872 Checking store: 0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA <<< __71-[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]_block_invoke
18:16:54.874 Revision range: store id: 0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA
revision: 16
global count: 35 store id: 0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA
revision: 16
global count: 35 <<< __71-[CDERevisionManager integrableEventsFromEvents:informativeErrorCodes:]_block_invoke
18:16:54.903 Checking if ready for integration <<< -[CDEEventIntegrator integrationIsNeededForEventIDs:]
18:16:54.975 Transferring data files from event store to cloud <<< -[CDECloudManager exportDataFilesWithProgress:]
18:16:54.996 Transferring baseline from event store to cloud <<< -[CDECloudManager exportNewLocalBaselineWithProgress:]
18:16:55.058 Transferring events from event store to cloud <<< -[CDECloudManager exportNewLocalNonBaselineEventsWithProgress:]
18:16:55.163 Removing outdated files <<< -[CDECloudManager removeOutdatedRemoteFilesWithCompletion:]
18:16:55.249 Removing cloud files: <<< -[CDECloudManager removeOutdatedRemoteFilesWithCompletion:]
18:16:55.269 Removing items at paths: (
) <<< -[CDECloudKitFileSystem removeItemsAtPaths:completion:]
18:16:55.270 Retrieving records for paths: (
) <<< -[CDECloudKitFileSystem fetchRecordsAtPaths:completion:]
18:16:55.273 Fetched records for removal: (
) <<< __55-[CDECloudKitFileSystem removeItemsAtPaths:completion:]_block_invoke
18:16:55.274 Removing items with recordIDs: (
) <<< -[CDECloudKitFileSystem removeItemsWithRecordIDs:completion:]
18:16:55.298 Completing Merge <<< __58-[CDEPersistentStoreEnsemble mergeWithOptions:completion:]_block_invoke.694
...and here are the push notifications:
IPOD TOUCH
18:16:28.199 | iCloudSyncActivity | Thread 16 | did receive remote notification, userInfo = '{
aps = {
"content-available" = 1;
sound = "";
};
ck = {
ce = 2;
cid = "iCloud.com.example.app";
nid = "cc0f33fc-0488-4abb-b9aa-2bfd7c8db88b";
qry = {
dbs = 1;
fo = 1;
rid = "CDEFileSystemNode_/DiveMateMainStore/events/33_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_21.cdeevent";
sid = CDEFileAddedSubscription;
zid = "com.mentalfaculty.ensembles.zone.schema2";
zoid = "_7fd2f6a37e22282e02a1d8fb52ba2d8e";
};
};
}'
IPAD:
18:16:42.258 | iCloudSyncActivity | Thread 15 | did receive remote notification, userInfo = '{
aps = {
"content-available" = 1;
sound = "";
};
ck = {
ce = 2;
cid = "iCloud.com.example.app";
nid = "2bb1a2f0-5dbb-47b7-b6e1-1e6de9afdac9";
qry = {
dbs = 1;
fo = 1;
rid = "CDEFileSystemNode_/DiveMateMainStore/events/34_0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA_16.cdeevent";
sid = CDEFileAddedSubscription;
zid = "com.mentalfaculty.ensembles.zone.schema2";
zoid = "_7fd2f6a37e22282e02a1d8fb52ba2d8e";
};
};
}'
IPOD TOUCH
[260 ] 18:16:48.064 | iCloudSyncActivity | Thread 16 | did receive remote notification, userInfo = '{
aps = {
"content-available" = 1;
sound = "";
};
ck = {
ce = 2;
cid = "iCloud.com.example.app";
nid = "4ee5383d-9a94-4596-99f2-18ae7da6e0ca";
qry = {
dbs = 1;
fo = 1;
rid = "CDEFileSystemNode_/DiveMateMainStore/events/35_826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3_22.cdeevent";
sid = CDEFileAddedSubscription;
zid = "com.mentalfaculty.ensembles.zone.schema2";
zoid = "_7fd2f6a37e22282e02a1d8fb52ba2d8e";
};
};
}'
What seems odd to me is that the Ensembles trace refers to 2 stores:
-one with id 826D4BD2-2ED2-4C3B-9A89-22E3D910EC55-476-000000FAF9F774C3
-one with id 0B96EB62-03B1-414F-BBA5-3FCBDD2E9CD4-777-000002E26205C2DA
For reference, this is how I setup Ensembles:
_ensemble = [[CDEPersistentStoreEnsemble alloc] initWithEnsembleIdentifier:DM_ENSEMBLE_IDENTIFIER
persistentStoreURL:storeURL
managedObjectModelURL:[self _getManagedObjectModelURL]
cloudFileSystem:_iCloudFileSystem];
Any help/pointers in the right direction are greatly appreciated.
Upvotes: 0
Views: 171
Answers (1)
Drew McCormack
Reputation: 3592
This is expected behavior, and the last merge should be very fast. If you find it too much, you can easily choose to throttle back your merges that are triggered by push notifications. Eg. If a push comes in within a minute of doing a merge, you could choose to ignore it.
The 3 merges per change are not no-ops. They are doing important accounting to ensure that devices all end up with the same data.
Think of Ensembles like Git. Internally, that is basically what it is. Now, you make a change on one device, which triggers a new commit (S1_D1) on that device. Then you do a merge to push the data to the cloud.
The second device now merges to get that data due to a push notification, and creates a commit for that (M1_D2). This may or may not include conflict resolutions, but it is important to the concurrency system. It is the equivalent in Git of merging two branches, and you have to have a new commit to represent that in the history.
The merge (M1_D2) is pushed to the cloud, and now the original device sees a new commit, and has to do a merge operation to import it, though it doesn't produce any new commits itself.
So a single save should require a merge on the original device, a merge on the other device, and another merge on the original device, in order to complete fully. That is how it works in a system like Git, and also in Ensembles.
Note that although 3 merge operations are needed, you have complete control over when they happen. You can delay them as long as you like, or ignore certain pushes as I mentioned. The system is smart enough to figure it all out when you do eventually merge (just like Git can).
Upvotes: 3
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