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Posted to dev@trafodion.apache.org by "Lijian (Q)" <ji...@huawei.com> on 2015/11/02 03:59:22 UTC

What's the role of TRAFODION._DTM_LOG* tables?

Hi,
         When I run the command "get get system hbase objects", I find there's some system tables prefixed by TRAFODION._DTM_LOG.
But these tables can't query, what does these tables do?

Thanks.

答复: What's the role of TRAFODION._DTM_LOG* tables?

Posted by "Lijian (Q)" <ji...@huawei.com>.

Thanks very much, Narendra!

-----邮件原件-----
发件人: Narendra Goyal [mailto:narendra.goyal@esgyn.com] 
发送时间: 2015年11月2日 12:09
收件人: dev@trafodion.incubator.apache.org
主题: Re: What's the role of TRAFODION._DTM_LOG* tables?

The Trafodion DTM (distributed transaction monitor) stores transactional audit log in these HBase tables. These cannot be queried by Trafodion SQL.

As these are HBase tables, one can definitely use HBase APIs/HBase shell to look at them.

Thanks,
-Narendra

On Sun, Nov 1, 2015 at 6:59 PM, Lijian (Q) <ji...@huawei.com> wrote:

> Hi,
>          When I run the command "get get system hbase objects", I find 
> there's some system tables prefixed by TRAFODION._DTM_LOG.
> But these tables can't query, what does these tables do?
>
> Thanks.
>

Re: What's the role of TRAFODION._DTM_LOG* tables?

Posted by Narendra Goyal <na...@esgyn.com>.

The Trafodion DTM (distributed transaction monitor) stores transactional
audit log in these HBase tables. These cannot be queried by Trafodion SQL.

As these are HBase tables, one can definitely use HBase APIs/HBase shell to
look at them.

Thanks,
-Narendra

On Sun, Nov 1, 2015 at 6:59 PM, Lijian (Q) <ji...@huawei.com> wrote:

> Hi,
>          When I run the command "get get system hbase objects", I find
> there's some system tables prefixed by TRAFODION._DTM_LOG.
> But these tables can't query, what does these tables do?
>
> Thanks.
>