Re: Proposal: pg_rewind to skip config files

> 5 сент. 2017 г., в 14:04, Michael Paquier <michael(dot)paquier(at)gmail(dot)com> написал(а):
>
>> For example, in archive_command we put WALs for archiving from
>> pg_xlog/pg_wal into another directory inside PGDATA and than another cron
>> task makes real archiving. This directory ideally should be skipped by
>> pg_rewind, but it would not be handled by proposed change.
>
> I would be curious to follow the reasoning for such a two-phase
> archiving (You basically want to push it in two places, no? But why
> not just use pg_receivexlog then?). This is complicated to handle from
> the point of view of availability and backup reliability + durability.

We do compress WALs and send them over network. Doing it via archive_command in single thread is sometimes slower than new WALs are written under heavy load.

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