Message-ID: <1426099223.6353.19.camel@gmail.com>
Subject: Re: Relocated Postgres
From: jaime soler <jaime.soler@gmail.com>
Reply-To: jaime.soler@gmail.com
To: "Rossi, Maria" <maria.rossi@us.pgds.com>
Cc: "'pgsql-admin@postgresql.org'" <pgsql-admin@postgresql.org>
Date: Wed, 11 Mar 2015 19:40:23 +0100
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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 old location)
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
> > 
> >  
> > 
> > 
> 
> 


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