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From Hyunsik Choi <hyun...@apache.org>
Subject Re: Supporting tablespace feature in HiveStore
Date Mon, 12 Sep 2016 09:15:04 GMT
Hi,

I'm sorry for late. I'm figuring out this problem. I'll give some comments
soon. Then, let's talk about it more.

Warm regards,
Hyunsik

On Tue, Aug 16, 2016 at 8:41 AM Dongjin Lee <dongjin@apache.org> wrote:

> Hello. Currently, I am working to add some missing features in
> HiveCatalogStore.[^1] However, I found that this feature needs the
> implementation of tablespace feature in HiveCatalogStore first so I decided
> that it would be better to ask you some advice before I start writing code
> - I have less experience on Tajo than almost all of you.
>
> As of current version(11.x), tablespace feature seems to be not supported
> in HiveCatalogStore. It only supports default tablespace in
> ${tajo.warehouse.directory}. Because there is no other storage that can
> save the mapping from ${tablespace-name} to {base-uri}, I propose the
> following scheme:
>
> 1. Basic Rule: Store tablespace under ${tajo.rootdir}/${tablespace-name}.
> In other words, ${base-uri} for the tablespace is
> ${tajo.rootdir}/${tablespace-name}.
> 2. The base uri for the default tablespace is ${tajo.warehouse.directory}.
> (no change)
> 3. The tablespace name whose base uri conflicts the default tablespace's
> base uri is disallowed.
>
> I think this strategy can be a roundabout way to the shortcomings of
> HiveCatalogStore, but I cannot certain. Are there any conflicts to my
> proposal with current implementation or our future plan? If you have any
> opinions, don't hesitate to give me a message. Thanks for reading.
>
> Regards,
> Dongjin
>
> [^1]: https://issues.apache.org/jira/browse/TAJO-2171
>
> --
> *Dongjin Lee*
>
>
> *Software developer in Line+.So interested in massive-scale machine
> learning.facebook: www.facebook.com/dongjin.lee.kr
> <http://www.facebook.com/dongjin.lee.kr>linkedin:
> kr.linkedin.com/in/dongjinleekr
> <http://kr.linkedin.com/in/dongjinleekr>github:
> <http://goog_969573159/>github.com/dongjinleekr
> <http://github.com/dongjinleekr>twitter: www.twitter.com/dongjinleekr
> <http://www.twitter.com/dongjinleekr>*
>

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