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From Nikolay Izhikov <nizhikov....@gmail.com>
Subject Re: Binary compatibility of persistent storage
Date Tue, 19 Sep 2017 11:36:42 GMT
Hello, Vladimir.

I prefer 2 option.

 > 2) No compatibility, but provide migration instruments

I think we have to provide some tool for converting WAL files from any 
older format to current.

19.09.2017 14:16, Vladimir Ozerov пишет:
> igniters,
> 
> Ignite doesn't have compatibility for binary protocols between different
> versions, as this would make development harder and slower. On the other
> hand we maintain API compatibility what helps us move users to new versions
> faster.
> 
> As native persistence is implemented, new challenge appeared - whether to
> maintain binary compatibility of stored data. Many approaches exist:
> 
> 1) No compatibility at all - easy for us, nightmare for users (IMO)
> 2) No compatibility, but provide migration instruments
> 3) Maintain compatibility between N latest minor versions
> 4) Maintain compatibility between all versions within major release
> 
> The more guarantees we offer, the harder them to maintain, the better UX.
> 
> Let's think on what compatibility mode we can offer to our users if any.
> Any ideas?
> 
> Vladimir.
> 

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