On Thu, Feb 18, 2010 at 2:49 PM, Ryan King <r...@twitter.com> wrote: > On Thu, Feb 18, 2010 at 11:45 AM, Anthony Molinaro > <antho...@alumni.caltech.edu> wrote: >> +1 >> (although I'm dreading the export from old sstables into new sstables, >> any ideas on how fast that might be?, and I guess any idea if a tool >> for doing this will be provided, or is it sstable2json and json2sstable?) > > I'm not entirely sure of the plans here, but I think the idea is that > any release of cassandra going forward is going to have to be able to > deal with multiple versions of SSTable formats. > > I propose that when we change the format in a release we don't > proactively rewrite the tables– just keep the old tables as-is and > only write with the new format when we're already going to be writing > a table (flushing or compacting). That way you can have a smooth > upgrade if you want, or if you want to force the upgrade, you just > trigger a major compaction.
This is my preference as well. We'll see if we can pull it off. :) -Jonathan
