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From: KK CHN <kkchn.in@gmail.com>
Date: Fri, 19 Jun 2026 17:36:12 +0530
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 <CAKgGyB_TX8hNQFFpjFohFJnT=L78ACPoznrsLq9Wg6h3+Cnhmg@mail.gmail.com>
Subject: Can use NFS mount partition for Pgbackrest Repo -path ?
To: pgsql-general@lists.postgresql.org
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Hi folks,

I am using the repo1-path as follows   for the pgbackrest  backup of more
than 6 DB clusters in a single remote repo server as follows.

ON MY REPO SERVER

[global]
repo1-path=/data/DB_BACKUPS
repo1-block=y
repo1-bundle=y
repo1-retention-full=3
repo1-retention-diff=3
repo1-cipher-type=aes-256-cbc
repo1-cipher-pass=acbd

The issue here is The repo1-path =  /data/DB_BACKUPS directory is the local
file storage of this repo server (A Virtual Machine running RHEL 9.4,
pgbackrest 2.25.1, PG16) which is almost  83 %  full now.
.
Note:   */dev/mapper/rhel-data   15T   13T  2.6T  83% /data   is almost
getting full  and it is not possible to extend the local storage partition
further. *

*To overcome the storage space,   my sys admin added an NFS  mount point
from  an external storage as follows.*

10.255.254.113:/Data    51T  384K   50T   1% /datanew         this is with
50 TB space.


*My Query is  :*

 1. *Can I use this NFS mount point  /datanew  as the repo1-path for
pgbackrest  to overcome the storage space shortage ?   *

2. *What are the drawbacks  in doing this approach ?  *

 3. *What command line tool  to use  either   mv  or tar  command which is
advisable and fast for copying all the existing /data/DB_BACKUPS    archive
and backup folders of the currently running backups of the six different
production  Database clusters  to the new NFS mount point  /datanew  by
minimal downtime (If  the NFS mount point for repo1-path is
possible/advisable ?) *

4.  *Also  setting permissions  for the repo server user ( in my case it is
pgbackrest itself)  for the NFS mount point is straight forward or do I
need to set permissions differently  in the NFS server side and client VM
side also ?* ( sorry for ignorance).


PS: -  Any hints and directions much appreciated to correct myself, If I am
doing wrong/direction.


Thank you,
Krishane.


[root@dbbackup ~]# df -h
Filesystem             Size  Used Avail Use% Mounted on
devtmpfs               4.0M     0  4.0M   0% /dev
tmpfs                   16G     0   16G   0% /dev/shm
tmpfs                  6.3G  655M  5.7G  11% /run
/dev/mapper/rhel-root  100G   38G   63G  38% /

*/dev/mapper/rhel-data   15T   13T  2.6T  83% /data   // Getting full*/dev/sda2
             960M  265M  696M  28% /boot
/dev/sda1              599M  7.1M  592M   2% /boot/efi
tmpfs                  3.2G   36K  3.2G   1% /run/user/1001
tmpfs                  3.2G   60K  3.2G   1% /run/user/0

*10.255.254.113:/Data    51T  384K   50T   1% /datanew   // New NFS mount
point added 50T*tmpfs                  3.2G   52K  3.2G   1% /run/user/42
[root@dbbackup ~]#

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<div dir=3D"ltr"><div>Hi folks,</div><div><br></div><div>I am using the rep=
o1-path as follows=C2=A0 =C2=A0for the pgbackrest=C2=A0 backup of more than=
 6 DB clusters in a single remote repo server as follows.</div><div><br></d=
iv><div>ON MY REPO SERVER</div><div><br></div><div>[global]<br>repo1-path=
=3D/data/DB_BACKUPS<br>repo1-block=3Dy<br>repo1-bundle=3Dy<br>repo1-retenti=
on-full=3D3<br>repo1-retention-diff=3D3<br>repo1-cipher-type=3Daes-256-cbc<=
br>repo1-cipher-pass=3Dacbd<br></div><div><br></div><div>The issue here is =
The repo1-path =3D=C2=A0 /data/DB_BACKUPS directory is the local file stora=
ge of this repo server (A Virtual Machine running RHEL 9.4, pgbackrest 2.25=
.1, PG16) which is almost=C2=A0 83 %=C2=A0 full now.=C2=A0</div><div>.</div=
><div>Note:=C2=A0 =C2=A0<b style=3D"background-color:transparent">/dev/mapp=
er/rhel-data =C2=A0 15T =C2=A0 13T =C2=A02.6T =C2=A083% /data=C2=A0 =C2=A0i=
s almost getting full=C2=A0 and it is not possible to extend the local stor=
age partition further.=C2=A0</b></div><div><b style=3D"background-color:tra=
nsparent"><br></b></div><div><b>To overcome the storage space,=C2=A0 =C2=A0=
my sys admin added an NFS=C2=A0 mount point=C2=A0 from=C2=A0 an external st=
orage as follows.</b></div><div><br></div><div>10.255.254.113:/Data =C2=A0 =
=C2=A051T =C2=A0384K =C2=A0 50T =C2=A0 1% /datanew=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0this is with 50 TB space.=C2=A0</div><div><br></div><div><b><br><=
/b></div><div><b>My Query is=C2=A0 :</b></div><div><br></div><div>=C2=A01.=
=C2=A0<span style=3D"background-color:transparent"><b>Can I use this NFS mo=
unt point=C2=A0 /datanew=C2=A0 as the repo1-path for=C2=A0 pgbackrest=C2=A0=
 to overcome the storage space shortage ?=C2=A0 =C2=A0</b></span></div><div=
><span style=3D"background-color:transparent">=C2=A0</span></div><div><span=
 style=3D"background-color:transparent">2. <b>What are the drawbacks=C2=A0 =
in doing this approach ?=C2=A0=C2=A0</b></span></div><div><span style=3D"ba=
ckground-color:transparent"><br></span></div><div><span style=3D"background=
-color:transparent">=C2=A03. <b>What command line tool=C2=A0 to use=C2=A0 e=
ither=C2=A0 =C2=A0mv=C2=A0 or tar=C2=A0 command which is advisable and fast=
 for copying all the existing /data/DB_BACKUPS=C2=A0 =C2=A0 archive and bac=
kup folders of the currently running backups of the six different productio=
n=C2=A0 Database clusters=C2=A0 to the new NFS mount point=C2=A0 /datanew=
=C2=A0 by minimal downtime (If=C2=A0 the NFS mount point for repo1-path is=
=C2=A0 possible/advisable ?)=C2=A0</b></span></div><div><span style=3D"back=
ground-color:transparent"><br></span></div><div>4.=C2=A0 <b>Also=C2=A0 sett=
ing permissions=C2=A0 for the repo server user ( in my case it is pgbackres=
t itself)=C2=A0 for the NFS mount point is straight forward or do I need to=
 set permissions differently=C2=A0 in the NFS server side and client VM sid=
e also ?</b> ( sorry for ignorance).=C2=A0</div><div><br></div><div><br></d=
iv><div>PS: -=C2=A0 Any hints and directions much appreciated to correct my=
self, If I am doing wrong/direction.=C2=A0=C2=A0</div><div><br></div><div><=
br></div><div>Thank you,</div><div>Krishane.=C2=A0</div><div><br></div><div=
><br></div><div><br></div>[root@dbbackup ~]# df -h<br>Filesystem =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Size =C2=A0Used Avail Use% Mounted on<br>de=
vtmpfs =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 4.0M =C2=A0 =C2=A0 =
0 =C2=A04.0M =C2=A0 0% /dev<br>tmpfs =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 16G =C2=A0 =C2=A0 0 =C2=A0 16G =C2=A0 0% /dev/shm<=
br>tmpfs =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A06.3G=
 =C2=A0655M =C2=A05.7G =C2=A011% /run<br>/dev/mapper/rhel-root =C2=A0100G =
=C2=A0 38G =C2=A0 63G =C2=A038% /<br><b>/dev/mapper/rhel-data =C2=A0 15T =
=C2=A0 13T =C2=A02.6T =C2=A083% /data=C2=A0 =C2=A0// Getting full<br></b>/d=
ev/sda2 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0960M =C2=A0265M =C2=
=A0696M =C2=A028% /boot<br>/dev/sda1 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0599M =C2=A07.1M =C2=A0592M =C2=A0 2% /boot/efi<br>tmpfs =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03.2G =C2=A0 36K =C2=
=A03.2G =C2=A0 1% /run/user/1001<br>tmpfs =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03.2G =C2=A0 60K =C2=A03.2G =C2=A0 1% /run/us=
er/0<br><b>10.255.254.113:/Data =C2=A0 =C2=A051T =C2=A0384K =C2=A0 50T =C2=
=A0 1% /datanew=C2=A0 =C2=A0// New NFS mount point added 50T<br></b>tmpfs =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03.2G =C2=A0 5=
2K =C2=A03.2G =C2=A0 1% /run/user/42<br>[root@dbbackup ~]#=C2=A0<br><br></d=
iv>

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