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From Jonathan Ellis <>
Subject Re: Changing comparators
Date Fri, 25 Feb 2011 15:26:12 GMT
Compaction assumes that the sstables it has as input are ordered
correctly (otherwise it would have to read the full row into memory to
re-sort).  So it would have to be a new operation, and not feasible in
general for larger-than-memory rows.  I don't think we'll ever add

On Wed, Feb 23, 2011 at 6:23 PM, Narendra Sharma
<> wrote:
> Today it is not possible to change the comparators (compare_with and
> compare_subcolumns_with). I went through the discussion on thread
> Does it make sense to atleast allow one way change i.e. from specific types
> to generic type? For eg change from TimeUUIDType or UTF8 to BytesType. This
> could be a manual process where users will do the schema change and then run
> major compaction on all the nodes to fix the ordering.
> Thanks,
> Naren

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support

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