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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 17:26:30 GMT
On Wed, Dec 8, 2010 at 12:06 PM, Ning Zhang <nzhang@fb.com> wrote:
> These are datanucleus paramesters found in hive-default.xml/hive-site.xml. If you change
them to the following the metastore schema won't be changed automatically (may be good for
preventing accidents).
>
>
> <property>
>  <name>datanucleus.autoCreateSchema</name>
>  <value>false</value>
> </property>
>
> <property>
>  <name>datanucleus.fixedDatastore</name>
>  <value>true</value>
> </property>
>
>
> ________________________________________
> From: Edward Capriolo [edlinuxguru@gmail.com]
> Sent: Wednesday, December 08, 2010 7:19 AM
> To: user@hive.apache.org
> Cc: <hive-user@hadoop.apache.org>
> Subject: Re: Safe to upgrade to Hive 0.7.0?
>
> 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
>

https://issues.apache.org/jira/browse/HIVE-1841 -- please comment

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