pg.ddx.io pgsql-admin@postgresql.org mailing list archive
help / color / mirror / Atom feedmany "cp: cannot stat xxx No such file or directory" logs in warm standby
5+ messages / 4 participants
[nested] [flat]
* many "cp: cannot stat xxx No such file or directory" logs in warm standby
@ 2020-09-28 05:12 Hong Yao <yahoon1982@gmail.com>
0 siblings, 1 reply; 5+ messages in thread
From: Hong Yao @ 2020-09-28 05:12 UTC (permalink / raw)
To: pgsql-admin@lists.postgresql.org
Hi all
I am setting up a standby server for my PG-12.4 primary server, following
the doc
https://www.postgresql.org/docs/12/warm-standby.html#STANDBY-SERVER-SETUP
(26.2.4.
Setting Up a Standby Server"
The OSes are CentOS-7.8
The steps on the standby:
- install postgresql-12 (not initdb)
- run pg_basebackup to fill the data folder
- clean pg_wal folder
- set restore command in postgresql.conf
- * restore_command = 'cp /var/pg_wal_archive/%f %p' *
- * archive_cleanup_command = 'pg_archivecleanup
/var/pg_wal_archive %r'*
- touch recovery.signal and standby.signal
- start the postgresql-12 service
But in the standalone logs, i see following errors keep repeating:
*cp: cannot stat ‘/var/pg_wal_archive/000000020000000000000014’: No such
file or directory*
*cp: cannot stat ‘/var/pg_wal_archive/00000003.history’: No such file or
directory*
Below is the content of archive folder
-rw-------. 1 postgres postgres 16777216 Sep 28 00:36
000000010000000000000014
-rw-------. 1 postgres postgres 16777216 Sep 28 00:28
000000010000000000000013
-rw-------. 1 postgres postgres 16777216 Sep 28 00:27
000000020000000000000013
-rw-------. 1 postgres postgres 42 Sep 28 00:26 00000002.history
-rw-------. 1 postgres postgres 340 Sep 28 00:22
000000010000000000000012.00000028.backup
-rw-------. 1 postgres postgres 16777216 Sep 28 00:22
000000010000000000000012
-rw-------. 1 postgres postgres 16777216 Sep 28 00:22
000000010000000000000011
-rw-------. 1 postgres postgres 16777216 Sep 28 00:18
000000010000000000000010
Does it mean my setup is not correct? How should I fix it?
Thanks in advance!
BR,
Yahoon
^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: many "cp: cannot stat xxx No such file or directory" logs in warm standby
@ 2020-09-28 05:28 Ian Barwick <ian.barwick@2ndquadrant.com>
parent: Hong Yao <yahoon1982@gmail.com>
0 siblings, 1 reply; 5+ messages in thread
From: Ian Barwick @ 2020-09-28 05:28 UTC (permalink / raw)
To: Hong Yao <yahoon1982@gmail.com>; pgsql-admin@lists.postgresql.org
On 2020/09/28 14:12, Hong Yao wrote:
> Hi all
>
> I am setting up a standby server for my PG-12.4 primary server, following the doc https://www.postgresql.org/docs/12/warm-standby.html#STANDBY-SERVER-SETUP (26.2.4. Setting Up a Standby Server"
> The OSes are CentOS-7.8
>
> The steps on the standby:
(...)
> * set restore command in postgresql.conf
> o / restore_command = 'cp /var/pg_wal_archive/%f %p' /
> o / archive_cleanup_command = 'pg_archivecleanup /var/pg_wal_archive %r'/
(...)
> But in the standalone logs, i see following errors keep repeating:
>
> /cp: cannot stat ‘/var/pg_wal_archive/000000020000000000000014’: No such file or directory/
> /cp: cannot stat ‘/var/pg_wal_archive/00000003.history’: No such file or directory/
This is expected, as PostgreSQL is speculatively looking for files which may have
arrived since the last check.
Per the documentation [1]:
"The command will be asked for file names that are not present in the archive"
[1] https://www.postgresql.org/docs/current//runtime-config-wal.html#GUC-RESTORE-COMMAND
Regards
Ian Barwick
--
Ian Barwick https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: many "cp: cannot stat xxx No such file or directory" logs in warm standby
@ 2020-09-29 03:05 Hong Yao <yahoon1982@gmail.com>
parent: Ian Barwick <ian.barwick@2ndquadrant.com>
0 siblings, 2 replies; 5+ messages in thread
From: Hong Yao @ 2020-09-29 03:05 UTC (permalink / raw)
To: Ian Barwick <ian.barwick@2ndquadrant.com>; +Cc: pgsql-admin@lists.postgresql.org
Thank you, Ian.
Is there a way to get rid of these msgs?
Regards,
Yahoon
On Mon, Sep 28, 2020 at 1:28 PM Ian Barwick <ian.barwick@2ndquadrant.com>
wrote:
> On 2020/09/28 14:12, Hong Yao wrote:
> > Hi all
> >
> > I am setting up a standby server for my PG-12.4 primary server,
> following the doc
> https://www.postgresql.org/docs/12/warm-standby.html#STANDBY-SERVER-SETUP (26.2.4.
> Setting Up a Standby Server"
> > The OSes are CentOS-7.8
> >
> > The steps on the standby:
>
> (...)
>
> > * set restore command in postgresql.conf
> > o / restore_command = 'cp /var/pg_wal_archive/%f %p' /
> > o / archive_cleanup_command = 'pg_archivecleanup
> /var/pg_wal_archive %r'/
>
> (...)
>
> > But in the standalone logs, i see following errors keep repeating:
> >
> > /cp: cannot stat ‘/var/pg_wal_archive/000000020000000000000014’: No
> such file or directory/
> > /cp: cannot stat ‘/var/pg_wal_archive/00000003.history’: No such
> file or directory/
>
> This is expected, as PostgreSQL is speculatively looking for files which
> may have
> arrived since the last check.
>
> Per the documentation [1]:
>
> "The command will be asked for file names that are not present in the
> archive"
>
> [1]
> https://www.postgresql.org/docs/current//runtime-config-wal.html#GUC-RESTORE-COMMAND
>
>
> Regards
>
> Ian Barwick
>
>
> --
> Ian Barwick https://www.2ndQuadrant.com/
> PostgreSQL Development, 24x7 Support, Training & Services
>
^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: many "cp: cannot stat xxx No such file or directory" logs in warm standby
@ 2020-09-29 03:28 Julien Rouhaud <rjuju123@gmail.com>
parent: Hong Yao <yahoon1982@gmail.com>
1 sibling, 0 replies; 5+ messages in thread
From: Julien Rouhaud @ 2020-09-29 03:28 UTC (permalink / raw)
To: Hong Yao <yahoon1982@gmail.com>; +Cc: Ian Barwick <ian.barwick@2ndquadrant.com>; pgsql-admin@lists.postgresql.org
Le mar. 29 sept. 2020 à 11:05, Hong Yao <yahoon1982@gmail.com> a écrit :
> Thank you, Ian.
>
> Is there a way to get rid of these msgs?
>
Please don't top post on this mailing list.
Those logs are harmless, but if you want to get rid of them you simply need
to write a small script that first check if the file exists, and exit with
a non zero return code if the wanted file doesn't exist.
^ permalink raw reply [nested|flat] 5+ messages in thread
* many "cp: cannot stat xxx No such file or directory" logs in warm standby
@ 2020-09-29 03:33 David G. Johnston <david.g.johnston@gmail.com>
parent: Hong Yao <yahoon1982@gmail.com>
1 sibling, 0 replies; 5+ messages in thread
From: David G. Johnston @ 2020-09-29 03:33 UTC (permalink / raw)
To: Hong Yao <yahoon1982@gmail.com>; +Cc: Ian Barwick <ian.barwick@2ndquadrant.com>; pgsql-admin@lists.postgresql.org <pgsql-admin@lists.postgresql.org>
On Monday, September 28, 2020, Hong Yao <yahoon1982@gmail.com> wrote:
> Thank you, Ian.
>
> Is there a way to get rid of these msgs?
>
Use something more robust than the bare cp utility as your
restore_command. You should consider leveraging open source instead of
writing your own.
David J.
^ permalink raw reply [nested|flat] 5+ messages in thread
end of thread, other threads:[~2020-09-29 03:33 UTC | newest]
Thread overview: 5+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2020-09-28 05:12 many "cp: cannot stat xxx No such file or directory" logs in warm standby Hong Yao <yahoon1982@gmail.com>
2020-09-28 05:28 ` Ian Barwick <ian.barwick@2ndquadrant.com>
2020-09-29 03:05 ` Hong Yao <yahoon1982@gmail.com>
2020-09-29 03:28 ` Julien Rouhaud <rjuju123@gmail.com>
2020-09-29 03:33 ` David G. Johnston <david.g.johnston@gmail.com>
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox