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From: Gerald Drouillard <gerald@drouillard.ca>
Date: Mon, 4 May 2026 06:10:45 -0400
Message-ID: <CAC_Y+MA5Lxk=GpHf14ZQoJmOUjBj5YREYUvhNdDni9=4-y=+ig@mail.gmail.com>
Subject: Re: Postgres DB backup is taking too much time
To: masheed ullah <masheedullah@gmail.com>
Cc: Ilya Anfimov <ilan@tzirechnoy.com>, pgsql-performance@lists.postgresql.org
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You could setup a replication to another PG server that is setup on a COW
file system like zfs.
Then you can take snapshots on the replica.


On Mon, May 4, 2026 at 5:59=E2=80=AFAM masheed ullah <masheedullah@gmail.co=
m> wrote:

> Thank you every one for your output.
>
> Although pgBeckRest has no more support.
> Should I suggest starting testing backup and restore with pgBectRest?
> I did not find any 3rd Party tool.
>
> On Mon, May 4, 2026 at 12:29=E2=80=AFPM Ilya Anfimov <ilan@tzirechnoy.com=
> wrote:
>
>> On Sun, May 03, 2026 at 12:42:21PM +0300, masheed ullah wrote:
>> >    Hi,
>> >    We have a database of 20TB, and it's taking almost 24 hours to
>> complete.
>> >    While full restore takes 28 hours. Although we have HA enabled with
>> >    primary and multiple replica's.
>> >    So we need a solution/tool to reduce the RTO, incase of disk failur=
e/
>> >    Human error for data/tables deletion.
>> >
>> >    We are using Barman for backup.
>>
>>  First, you'd need engineers to measure -- what's going on.
>>  Who  is the slowest part? The network (most probable)? The post-
>> gres replication process? The disk that postgres reads? The  bar-
>> man  itself?  Receiver  disks/S3  daemon/etc?  TLS  of one of the
>> above?
>>  Measures is the key. Then the solutions may be searched.
>>
>> btw, a modern postgres can definitely supply 1GB/s to barman on a
>> modern  system.   This  is  not a much, and probably could be im-
>> proved by special tricks like rsync or manual prefetch or  incre-
>> mental  copies  --  however,  it's less than 6 hours estimate and
>> therefore is fine for you.
>>
>> >    My question is "Are there any tools like ZDLRA appliances for
>> Oracle" to
>> >    reduce the RTO to less than 10 hours".
>> >    Best Regards,
>> >    Khattak
>>
>>
>>
>
>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,sa=
ns-serif">You could setup a replication to another PG server that is setup =
on a COW file system like zfs.</div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,sans-serif">Then you can take snapshots on the replica.</d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,sans-serif"><br>=
</div></div><br><div class=3D"gmail_quote gmail_quote_container"><div dir=
=3D"ltr" class=3D"gmail_attr">On Mon, May 4, 2026 at 5:59=E2=80=AFAM mashee=
d ullah &lt;<a href=3D"mailto:masheedullah@gmail.com">masheedullah@gmail.co=
m</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"=
><div dir=3D"ltr"><div dir=3D"ltr">Thank you every one=C2=A0for your output=
.<br><br>Although pgBeckRest has no more support.=C2=A0<div>Should I sugges=
t starting testing backup and restore with=C2=A0pgBectRest?<br>I did not fi=
nd any 3rd Party tool.</div></div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Mon, May 4, 2026 at 12:29=E2=80=AFPM Ilya =
Anfimov &lt;<a href=3D"mailto:ilan@tzirechnoy.com" target=3D"_blank">ilan@t=
zirechnoy.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex">On Sun, May 03, 2026 at 12:42:21PM +0300, masheed ullah wrote:=
<br>
&gt;=C2=A0 =C2=A0 Hi,<br>
&gt;=C2=A0 =C2=A0 We have a database of 20TB, and it&#39;s taking almost 24=
 hours to complete.<br>
&gt;=C2=A0 =C2=A0 While full restore takes 28 hours. Although we have HA en=
abled with<br>
&gt;=C2=A0 =C2=A0 primary and multiple replica&#39;s.<br>
&gt;=C2=A0 =C2=A0 So we need a solution/tool to reduce the RTO, incase of d=
isk failure/<br>
&gt;=C2=A0 =C2=A0 Human error for data/tables deletion.<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 We are using Barman for backup.<br>
<br>
=C2=A0First, you&#39;d need engineers to measure -- what&#39;s going on.<br=
>
=C2=A0Who=C2=A0 is the slowest part? The network (most probable)? The post-=
<br>
gres replication process? The disk that postgres reads? The=C2=A0 bar-<br>
man=C2=A0 itself?=C2=A0 Receiver=C2=A0 disks/S3=C2=A0 daemon/etc?=C2=A0 TLS=
=C2=A0 of one of the<br>
above?<br>
=C2=A0Measures is the key. Then the solutions may be searched.<br>
<br>
btw, a modern postgres can definitely supply 1GB/s to barman on a<br>
modern=C2=A0 system.=C2=A0 =C2=A0This=C2=A0 is=C2=A0 not a much, and probab=
ly could be im-<br>
proved by special tricks like rsync or manual prefetch or=C2=A0 incre-<br>
mental=C2=A0 copies=C2=A0 --=C2=A0 however,=C2=A0 it&#39;s less than 6 hour=
s estimate and<br>
therefore is fine for you.<br>
<br>
&gt;=C2=A0 =C2=A0 My question is &quot;Are there any tools like ZDLRA appli=
ances for Oracle&quot; to<br>
&gt;=C2=A0 =C2=A0 reduce the RTO to less than 10 hours&quot;.<br>
&gt;=C2=A0 =C2=A0 Best Regards,<br>
&gt;=C2=A0 =C2=A0 Khattak<br>
<br>
<br>
</blockquote></div><div><br clear=3D"all"></div><div><br></div><div dir=3D"=
ltr" class=3D"gmail_signature"><div dir=3D"ltr"><div><br></div><br></div></=
div></div>
</blockquote></div>

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