Thanks for you suggestion, it is a good idea!

zhangli...@apache.org <zhangli...@apache.org> 于2019年12月3日周二 下午4:56写道:

> Yes, it is a good design.
> I have a suggestion, mailing list can not display picture, how about paste
> the picture in to github issue?
>
> ------------------
>
> Liang Zhang (John)
> Apache ShardingSphere & Dubbo
>
>
> Zhiyi Yan <cathyzh...@gmail.com> 于2019年12月3日周二 上午11:08写道:
>
> > Hi ShardingSphere community,
> >
> > We are going to add a new feature - shadow database, this feature is
> > designed to allow dirty data to be written to the shadow database when
> > applying the online environment for pressure measurement,  the relevant
> > issue is :
> > https://github.com/apache/incubator-shardingsphere/issues/3269
> >
> > We want to do this through SQL parse and add router, add a tag field in
> > sql, and according to this field, route to shadow database.
> >
> > Here is a simple design,and we chose the second way.  because ThreadLocal
> > might introduce other problems.
> >
> > [image: sharding-shadow.png]
> >
> > Comments or Suggestions on this design are welcome!
> >
> > Thanks!
> > --
> > Zhiyi Yan (Zhyee)
> > Apache ShardingSphere
> >
>


-- 
Zhiyi Yan (Zhyee)
Apache ShardingSphere

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