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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: Safe to upgrade to Hive 0.7.0?
Date Wed, 08 Dec 2010 15:19:42 GMT
On Wed, Dec 8, 2010 at 9:55 AM, Ryan LeCompte <lecompte@gmail.com> wrote:
> Hey guys,
> We would like to experiment with some of the features in the current trunk
> (0.7) release. Do you think at this point it's nearing "production-ready" ?
> Are there any metastore migration scripts or anything like that before
> upgrading to 0.7 from 0.6?
> Thanks,
> Ryan
>

Ryan,

This is hard to say. There are many changes going in around indexing
and authorization. IMHO everyone is taking a lot of care in the design
however, it is still subject to change.

If i were compelled to update I would spin up a new instance into a
new meta-store back end. Then compare the schema of current with 0.6.X
like a diff of 'show create tables'.

Just an FYI. I applied two different hive trunks between 0.5 and 0.6.
and I never needed the update scripts because hive happily updated the
schema for me. After my final upgrade to 0.7.0 I re-ran everything in
the upgrade script just to be safe. Nothing noticeably bad happened to
me during the duration.

I suspect many people will not need to run the update scripts since in
the stock configuration hive seems to auto-update anyway. (Someone
correct me if I am wrong here.) Does anyone know how to specifically
which variable controls this?

Edward

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