Re: Relocated Postgres - Mailing list pgsql-admin

El mié, 11-03-2015 a las 17:33 +0000, Rossi, Maria escribió:
> Jaime,
>
> Yes, I stopped the instance before the copy.  Here's the archive at the postgressql.conf:
>
> archive_mode = on               # allows archiving to be done
> archive_command = 'cp -i "%p" /dba/psg/gs07/pg_tranlog/pg_archlog/"%f"'

I recommend you to avoid using modifier -i of cp command, because it
will ask you if you want to overwrite a file (interactive mode inside a
script ?) and although the file isn't overwriten cp returns with 0 exit
code, and it means than archiver process has properly archived
00000001000000000000004C and that is false.
why are you using double quotes on %p and %f?

>
>
> Also,   Here’s how I relocated.
> 1)     Shutdown postgres
> 2)    Copied pg_data to another directory
> 3)    Copied pg_xlog to yet another directory  (we wanted to put the pg_data and tranlog in separate directories)
> 4)    At the new pg_data  directory, create symbolic link
>     ln -s /dba/pgsql /gs07/pg_tranlog/pg_xlog pg_xlog    (this is where my problem started,  I had it pointing to the
oldlocation) 
I don't understand why are you using this command with threes arguments,
I have never used before. But It seems that symbolic links weren't
created correctly. The wal file: 00000001000000000000004C already exists
in pg_xlog and maybe you're pointing pg_archlog to pg_xlog directory and
this is why archive_command throwed errors.

> 5)    Updated postgressql.conf   for the new location (unaware that my symbolic link was pointing to the  old
location)
> 6)    Start postgres
>
> So any logs went to the old location.
>
> Thanks/

Regards, Jaime
>
> Maria A Rossi
> Database Administration
> PGDS (US)
> email: maria.rossi@us.pgds.com
> cell phone: 517.256.4392
> work phone: 517.367.3099
> work phone extension: 23099
>
> -----Original Message-----
> From: jaime soler [mailto:jaime.soler@gmail.com]
> Sent: Wednesday, March 11, 2015 12:35 PM
> To: Rossi, Maria
> Cc: 'pgsql-admin@postgresql.org'
> Subject: Re: [ADMIN] Relocated Postgres
>
> El mié, 11-03-2015 a las 01:02 +0000, Rossi, Maria escribió:
> > HI,
> >
>
> Hi,
> >
> >
> > I relocated an postgres instance.  The pg_data, pg_tranlog,
> > pg_hba.conf, etc were copied to new directories.
>
> did you stop the instance, before start the copy ?
> >   Then, I updated the postgresql.conf accordingly.  Postgres started
> > ok, and I can connect.   However when I stopped it,  the following msg
> > appeared at the errorlog:
> >
> >
> >
> > cp: overwrite
> > `/dba/psg/gs07/pg_tranlog/pg_archlog/00000001000000000000004C'? <
> > 2015-03-10 20:50:38 EDT >LOG:  database system is shut down
> >
> Could you share with us archive_command and archive_mode of postgresql.conf ?
> It seems than you are using "cp -i" in your archive_command, doesn't it ?
>
> >
> >
> > Postgres proceeded to shutdown.
> >
> >
> >
> > ‘ls’ showed that the file still have the old timestamp, which is the
> > timestamp when I copied it over:
> >
> >
> >
> > ls -ltr /dba/psg/gs07/pg_tranlog/pg_archlog/00000001000000000000004B
> >
> > -rw------- 1 gs07 dbagroup 16777216 Mar 10
> > 12:07 /dba/psg/gs07/pg_tranlog/pg_archlog/0000000100
> >
> >
> >
> > I did not have any transctions, though between the start-up and
> > shutdown.  I would have expected the timestamp of the logfile to have
> > been changed.
> >
> > Looks like it was waiting for a response to ‘cp’.
> >
> >
> >
> > I am concerned that if there were any transactions, I would have lost
> > it.
> >
> > Pls advice.
> >
> >
> >
> > Thanks.
> >
> >
> >
> > Maria
> >
> >
> >
> >
>
>