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From Greg Chase <gch...@pivotal.io>
Subject Re: where is hawq's catalog
Date Wed, 28 Oct 2015 10:03:21 GMT
This might be some food information to add to HAWQ's WIKI if someone wants some contribution
karma.

This email encrypted by tiny buttons & fat thumbs, beta voice recognition, and autocorrect
on my iPhone.

> On Oct 28, 2015, at 2:26 AM, Lei Chang <chang.lei.cn@gmail.com> wrote:
> 
> 
> hawq catalog is on master and it uses local file system. 
> 
> For hawq, catalog only sits on master. GPDB is different. catalog is on all the nodes.
> 
> you can reference paper here for more details:
> 
> Lei Chang et al: HAWQ: a massively parallel processing SQL engine in hadoop. SIGMOD Conference
2014: 1223-1234
> 
> 
> 
>> On Wed, Oct 28, 2015 at 5:08 PM, sequoiadb <mailing-list-recv@sequoiadb.com>
wrote:
>> where is hawq's catalog
>> Is it using master’s local file system or if it’s on hdfs?
>> I’m not very familiar with GPDB or HAWQ, each segment has its own catalog ( including
local tables, indexes, stored procedures, etc… ) or all sitting at master node? Is there
any detailed architecture document I can read?
>> Thx
> 

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