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From: Nagy László Zsolt <gandalf@shopzeus.com>
To: Rui DeSousa <rui.desousa@icloud.com>
Cc: pgsql-admin@lists.postgresql.org
Subject: Re: Reliable WAL file shipping over unreliable network
Date: Wed, 28 Feb 2018 20:11:33 +0100
Message-ID: <10bea809-cf89-4e5d-6064-95dd95164e20@shopzeus.com> (raw)
In-Reply-To: <285DC762-7035-4313-B550-5DA2273D7066@icloud.com>
References: <dd116172-3ddf-ee56-57f3-6e18d49abf8e@shopzeus.com>
	<400AC9CD-1E43-422C-A689-70BDBAFF231E@elevated-dev.com>
	<ee3ae4be-ab24-8443-82c1-95bcd4f86a63@shopzeus.com>
	<debd4205-e27a-cd9d-9169-6748e65083a2@shopzeus.com>
	<BA4A1866-95B0-49C6-8CD1-3D1B60A7837E@elevated-dev.com>
	<CF30D15A-BD42-42A7-9AD3-BB69AF9E8047@icloud.com>
	<954e01b6-b240-eb9a-5feb-8efd202fef5a@shopzeus.com>
	<285DC762-7035-4313-B550-5DA2273D7066@icloud.com>



2018. 02. 28. 19:11 keltezéssel, Rui DeSousa írta:
> Easiest thing to do is to keep the replica from seeing the file until
> it’s successfully transferred; i.e.
>
> 1. Transfer the file successfully first with a temporary extension:  
> $ARCH_DIR/$WALFILE.swap
> 2. If successfully transferred then move it into place:
>     mv $ARCH_DIR/$WALFILE.swap $ARCH_DIR/$WALFILE
This works ONLY if the directory is mounted on the master, and you can
execute "mv" on the master (as part of the archive_command) to rename
the file that is stored on the slave.

But the original question specified that mounting is not an option.





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