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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

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,

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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