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POCore Data : migration still happens when just adding or renaming only one property?
 

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    <p>As the title says, I just add or rename one property of one entity. So, when the user upgrade to the new version, <code>does Core Data have to read all the existing data into memory and write into the destination store?</code></p> <p>This is too big a price for just a small change on the data model.</p> <p>And one more question : <code>Can I use lightweight migration or custom migration dynamically according to the filesize of persistent store?</code> If the database is too big, I run custom migration to avoid memory warning, otherwise I choose lightweight for better user experience.</p> <p>These confuse me a lot. Thanks for any tips.</p> <p>Nice links for custom migrations:</p> <p><a href="https://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes">example</a></p> <p><a href="http://www.objc.io/issue-4/core-data-migration.html" rel="nofollow noreferrer">another example</a></p>
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