|From:||Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>|
|To:||Michael Paquier <michael(at)paquier(dot)xyz>|
|Cc:||Michael Banck <michael(dot)banck(at)credativ(dot)de>, Postgres hackers <pgsql-hackers(at)postgresql(dot)org>|
|Subject:||Re: Offline enabling/disabling of data checksums|
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> Yes, that would be nice, for now I have focused. For pg_resetwal yes
> we could do it easily. Would you like to send a patch?
Here is a proposal for "pg_resetwal".
The implementation basically removes a lot of copy paste and calls the
new update_controlfile function instead. I like removing useless code:-)
The reserwal implementation was doing a rm/create cycle, which was leaving
a small window for losing the controlfile. Not neat.
I do not see the value of *not* fsyncing the control file when writing it,
as it is by definition very precious, so I added a fsync. The server side
branch uses the backend available "pg_fsync", which complies with server
settings there and can do nothing if fsync is disabled.
Maybe the two changes could be committed separately.
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