From: | "osumi(dot)takamichi(at)fujitsu(dot)com" <osumi(dot)takamichi(at)fujitsu(dot)com> |
---|---|
To: | 'Masahiko Sawada' <sawada(dot)mshk(at)gmail(dot)com> |
Cc: | "'pgsql-hackers(at)lists(dot)postgresql(dot)org'" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
Subject: | Enhance traceability of wal_level changes for backup management |
Date: | 2021-01-06 09:57:08 |
Message-ID: | OSBPR01MB4888B94DF1C9325033C26D00EDD00@OSBPR01MB4888.jpnprd01.prod.outlook.com |
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Lists: | pgsql-hackers |
Hi,
This thread came from another thread about wal_level [1].
Mainly from backup management tools perspective
such as pgBackRest, EDB's BART and pg_probackup,
it seems worth talking about a way comprehensively
to trace and recognize wal_level changes for various purposes and values
like necessity of invalidating old backups for example.
In the thread [1], I talk about wal_level='none' but
these kind of topic applies changing wal_level to 'minimal'
from higher level too. Accordingly, I made this topic as a new independent thread.
Currently, these backup management tools described above
work when wal_level is higher than minimal
because these use physical online backup or wal archiving
but giving any useful ideas for backup management
related to wal_level changes is welcomed.
Best Regards,
Takamichi Osumi
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