maria-developers team mailing list archive

[Sachin Setiya <sachin.setiya@xxxxxxxxxxx>]

Hi Kristian!
On Fri, Jul 20, 2018 at 8:38 PM Kristian Nielsen <knielsen@xxxxxxxxxxxxxxx>
wrote:

> Sachin Setiya <sachin.setiya@xxxxxxxxxxx> writes:
>
> > This issue is regarding Mdev-9107 , where we have 3 master master with
> > do_domain_ids of
>
> > I have created a abstract test case for this probem.
> >                                       (3)
> >                                     ^     ^
> >                                    /         \
> >                                  (2)----->(1)
> >
> > 3 and 1 is configured with log slave updates.
> > 3 has 2 replication channel m2_s3(do_domain_id=2 ), m1_s3(do_domain_id=1)
> > 1 has one replication channel m2_s1(do_domain_id=2)
>
> This seems to be just user error. All these --do-xxx / --ignore-xxx
> replication filter options are always dangerous, and this usage seems
> clearly wrong. I also did not see a clearly explained reason in the bug
> report why this should work. On the contrary, Elena's suggestion to use
> --gtid-ignore-duplicate (if one really wants to do something as complex as
> this) seems appropriate.
>
> I tried with --gtid-ignore-duplicates and it worked perfectly. I guess
this is just user error.

> Is there a reason this is considered a bug (other than that the reporter
> somehow assumed a different behaviour for --do-domain-id)? What does the
> documentation say?
>
According to documentation it is correct behavior , it will not apply
events but update
gtid_slave_pos table.

>
> > May be we should have one more option in master_use_gtid =
> > binlog_state ? which will compare its binlog_state to
>
> I think that sounds like a very bad idea. The current_pos/slave_pos is the
> single biggest source of confusion regarding GTID. (In fact, I think it
> would be best to deprecate/eventually remove current_pos). Better not add
> to
> the confusion...
>
> If we remove current pos then how will how will master turned slave will
work ?

>  - Kristian.
>

Regards
sachin