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From Nikolay Izhikov <nizhi...@apache.org>
Subject Re: Thin clients compatibility policy
Date Wed, 06 Jun 2018 10:20:24 GMT
+1 From me.

As I wrote in previous mail-threads,
I think we need to create test framework to be able to test compatibility for all clients
we have.

AFAIK, currently, there is no possibility to automatically check compatibility.

В Ср, 06/06/2018 в 11:39 +0300, Vladimir Ozerov пишет:
> Igniters,
> 
> I'd like to discuss once again our compatibility policy for thin clients
> (.JDBC, ODBC, .NET, Java, etc.). We have no clear rules for now, so let's
> try to come to agreement.
> 
> Normally database vendors work as follows:
> 1) There is a set of currently supported database versions
> 2) There is a set of currently supported JDBC/ODBC drivers
> 3) Every supported driver can work with every supported database (with
> little exclusions to this rule).
> 
> That is, they are both backward and forward compatible. I can take latest
> Oracle's JDBC and some ancient Oracle version, and it will work, unless
> this version reached EOL and is no longer supported. And vice versa - new
> database, old driver, all is fine.
> 
> This is ideal scheme which I'd like to see in Ignite, but:
> 1) Our protocol is still relatively young and evolve rapidly
> 2) AI does not have any maintenance releases, so we cannot define which
> version is supported and which is not.
> 3)
> 
> I'd like to propose the following compatibility policy:
> 1) Maintain forward and backward compatibility between two nearest minor
> releases only. E.g. 2.5 can work with 2.4, 2.6 with 2.5, etc.
> 2) Think of more strict compatibility rules in AI 3.0 because at this point
> our protocol will be stable enough.
> 
> Thoughts?
> 
> Vladimir.
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