Lars Kroll comments

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                                            Lars Kroll

Update Protocol Spec for Deletion Vectors

I added a reader version now, so we have *something* there, but my intention is still to hold this until @xupefei introduces the feature thingy discussed above.

Roaring64NavigableMap serialized binary format is not compatible with CRoaring's 64bit version

Should close it then, I guess.

Support reading records in roaringbitmap from iteratively serialized persistent files

Sounds like this is what you are looking for? https://github.com/RoaringBitmap/RoaringBitmap#working-with-memory-mapped-bitmaps

[Spark] Automatically add legacy features to table when setting legacy protocol versions

> Asking the user to set `delta.minReaderVersion` and `delta.minWriterVersion` is not user-friendly. This means users need to understand how to map a feature to `minReaderVersion/minWriterVersion`. True...but it's even worse if...

[Spark] Protocol version downgrade in the presence of table features

> Is the description correct? Reader v1 doesn’t support DV I think the intent of "can be downgraded" was an implicit "after removing the DV feature".