Re: Core Data : Opt Out of SQLite WAL is nullified after File > Duplicate ?
Re: Core Data : Opt Out of SQLite WAL is nullified after File > Duplicate ?
- Subject: Re: Core Data : Opt Out of SQLite WAL is nullified after File > Duplicate ?
- From: Jerry Krinock <email@hidden>
- Date: Tue, 28 Jan 2014 10:44:14 -0800
On 2014 Jan 25, at 14:23, Mike Abdullah <email@hidden> wrote:
> is there actually any harm in using the new style journal, does anybody know?
The bug reported by Glenn Austin in this thread, that future store migrations may cause data loss for some users, seems pretty serious to me. Here are more reports of this issue:
http://pablin.org/2013/05/24/problems-with-core-data-migration-manager-and-journal-mode-wal/
http://stackoverflow.com/questions/17487306/ios-coredata-are-there-any-disadvantages-to-enabling-sqlite-wal-write-ahead
They say it’s OK if you lightweight migration, but not for “heavyweight” or “advanced” migrations (in which you subclass NSMigrationManager, etc.). However there are reports of a workaround in that case.
Nothing is simple nowadays :))
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