| From: | Sergei Kornilov <sk(at)zsrv(dot)org> |
|---|---|
| To: | Joshua D(dot) Drake <jd(at)commandprompt(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Michael Banck <michael(dot)banck(at)credativ(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Daniel Gustafsson <daniel(at)yesql(dot)se>, Robert Haas <robertmhaas(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Greg Stark <stark(at)mit(dot)edu>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Online enabling of checksums |
| Date: | 2018-08-01 18:03:22 |
| Message-ID: | 704731533146602@sas1-a3690af4eda2.qloud-c.yandex.net |
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| Lists: | pgsql-hackers |
Hi
> They fail over to a secondary to do maintenance on a primary.
But this is not problem even in current patch state. We can restart replica before failover and it works. I tested this behavior during my review.
We can:
- call pg_enable_data_checksums() on master
- wait change data_checksums to inprogress on replica
- restart replica - we can restart replica before promote, right?
- promote this replica
- checksum helper is launched now and working on this promoted cluster
regards, Sergei
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