Hi,
On 2022-11-08 00:07:09 +0100, Jérémie Grauer wrote:
> On 06/11/2022 03:38, Andres Freund wrote:
> > Hi,
> >
> > On 2022-11-03 16:54:13 +0100, Jérémie Grauer wrote:
> > > Currently pg_rewind refuses to run if full_page_writes is off. This is to
> > > prevent it to run into a torn page during
On Tue, Nov 8, 2022 at 12:07 PM Jérémie Grauer
wrote:
> On 06/11/2022 03:38, Andres Freund wrote:
> > On 2022-11-03 16:54:13 +0100, Jérémie Grauer wrote:
> >> Currently pg_rewind refuses to run if full_page_writes is off. This is to
> >> prevent it to run into a torn page during operation.
> >>
>
Hello,
First, thank you for reviewing.
ZFS writes files in increment of its configured recordsize for the
current filesystem dataset.
So with a recordsize configured to be a multiple of 8K, you can't get
torn pages on writes, that's why full_page_writes can be safely
deactivated on ZFS
Hi,
On 2022-11-03 16:54:13 +0100, Jérémie Grauer wrote:
> Currently pg_rewind refuses to run if full_page_writes is off. This is to
> prevent it to run into a torn page during operation.
>
> This is usually a good call, but some file systems like ZFS are naturally
> immune to torn page (maybe
Hello,
Currently pg_rewind refuses to run if full_page_writes is off. This is
to prevent it to run into a torn page during operation.
This is usually a good call, but some file systems like ZFS are
naturally immune to torn page (maybe btrfs too, but I don't know for
sure for this one).
