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Import x1 on dbstore2001
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x1 needs to be imported into dbstore2001.
It is not as easy as just dumping the tables from one of the x1 hosts, as depending on the wiki, some tables do live on production instead of x1.


Event Timeline

Mentioned in SAL (#wikimedia-operations) [2017-03-08T09:39:32Z] <marostegui> Stop replication on db2033 - T159707

In order to start the import I have renamed the tables that aren't supposed to be in use on dbstore2001, that is, all the echo_% tables in all the databases but the following:

root@dbstore2001:/srv/sqldata# for i in mediawikiwiki metawiki officewiki; do echo $i; ls -lhS $i/echo* | grep ibd;done
-rw-rw---- 1 mysql mysql 1.3G Mar  8 10:07 mediawikiwiki/echo_notification.ibd
-rw-rw---- 1 mysql mysql 156M Mar  8 09:28 mediawikiwiki/echo_target_page.ibd
-rw-rw---- 1 mysql mysql 124M Mar  8 10:07 mediawikiwiki/echo_event.ibd
-rw-rw---- 1 mysql mysql 8.0M Mar  8 07:30 mediawikiwiki/echo_email_batch.ibd
-rw-rw---- 1 mysql mysql 1.1G Mar  8 10:06 metawiki/echo_notification.ibd
-rw-rw---- 1 mysql mysql 668M Mar  8 09:54 metawiki/echo_event.ibd
-rw-rw---- 1 mysql mysql 116M Mar  8 10:06 metawiki/echo_target_page.ibd
-rw-rw---- 1 mysql mysql 1.0M Mar  8 00:09 metawiki/echo_email_batch.ibd
-rw-rw---- 1 mysql mysql  36M Mar  8 04:34 officewiki/echo_notification.ibd
-rw-rw---- 1 mysql mysql  18M Mar  8 06:12 officewiki/echo_event.ibd
-rw-rw---- 1 mysql mysql 9.0M Mar  8 08:29 officewiki/echo_target_page.ibd
-rw-rw---- 1 mysql mysql 1.0M Mar  7 13:09 officewiki/echo_email_batch.ibd

On the rest of the wikis they have been renamed, example:

| Tables_in_eswikiversity (%echo_%) |
| T159707_echo_email_batch          |
| T159707_echo_event                |
| T159707_echo_notification         |
| Tables_in_eswikivoyage (%echo_%) |
| T159707_echo_email_batch         |
| T159707_echo_event               |
| T159707_echo_notification        |
| Tables_in_etwikibooks (%echo_%) |
| T159707_echo_email_batch        |
| T159707_echo_event              |
| T159707_echo_notification       |

I will leave it like that for a few hours to make sure replication doesn't break, and will start to import those tables from db2033 (x1), ignoring mediawikiwiki metawiki officewiki on db2033

Mentioned in SAL (#wikimedia-operations) [2017-03-09T11:24:32Z] <marostegui> Stop replication db2033 - T159707

After all the checks to make sure we do not break dbstore2001 I am importing x1 into it.

Change 342171 had a related patch set uploaded (by Marostegui):
[operations/puppet] Add replication filter for wikis

Change 342171 merged by Marostegui:
[operations/puppet] Add replication ignore filters

The replication broke because it is missing some tables?

Mentioned in SAL (#wikimedia-operations) [2017-03-10T15:03:22Z] <marostegui> Stop slave db2033 for maintenance - T159707

The replication broke because it is missing some tables?

As we spoke, that was due to a bad regex where it matched test2wiki and excluded it from the MySQL dump, that is the reason it broke. The new import is now half way

x1 is now replicating on dbstore2001. We will see if it breaks again (hopefully not!) - I will leave it replicating during the weekend.

This looks good and have been working fine since Friday evening.