On Sat, Jul 21, 2018, 11:51 Sachin Setiya <sachin.set...@mariadb.com> wrote:
> Hi Kristian! > On Fri, Jul 20, 2018 at 8:38 PM Kristian Nielsen <kniel...@knielsen-hq.org> > wrote: > >> Sachin Setiya <sachin.set...@mariadb.com> 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 ? > May be in this case user have to manually update gtid_slave_pos ? > - Kristian. >> > > Regards > sachin >
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