[Mulgara-dev] The future of Mulgara. What is 'XA2' and how will it benefit you.

[Tate Jones]

An accurate understanding of the problem.  From memory Kowari was  
heavily IO bound after 250 million.

Some additional thoughts for the document

- Isolation levels - should XA2 support phantom and repeatable reads?  
Configurable at the session transaction level?
- Simple test plan (how to confirm the scalability, performance and  
robustness)


On 27/11/2006, at 11:27 AM, Andrae Muys wrote:

>
> Anytime the Mulgara developers have discussed the future of  
> Mulgara, prominent in any roadmap has been an item known only as  
> 'XA2'.  Anyone following the discussions will have realised that we  
> are very excited about it, but there has been very little public  
> discussion as to precisely what it is, or what benefits it would  
> bring to Mulgara's present and future users.
>
> Now that the transaction architecture has been redesigned and re- 
> implemented, and the Resolver-SPI is stabilised, the necessary  
> preconditions for the implementation of XA2 are in place.  I have  
> therefore prepared a discussion paper on "Version 2 of the Mulgara  
> Transactional Store Layer", to give XA2 its full name.  It gives a  
> brief outline of what XA2 is; how it works; and why it is important  
> to Mulgara.  If you read it you will understand why we are so  
> excited about it, and why we cannot discuss the future of Mulgara  
> without also discussing XA2.
>
>
> http://www.netymon.com/papers/XA2-Discussion-Paper.pdf
>
>
> As I mentioned last week, I am enjoying a brief period without the  
> demands of a contract, so I am  preparing another document that  
> provides a more in depth discussion of the design, and a proposed  
> set of implementation milestones - some of which are useful in  
> their own right.
>
> It is my belief that every Mulgara user will see substantial  
> benefit from XA2.
>
> Andrae Muys
>
> -- 
> Andrae Muys
> andrae at netymon.com
> Principal Mulgara Consultant
> Netymon Pty Ltd
>
>
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Tate Jones
tate at bluedog.com.au