Re: Setting up of PITR system. - Mailing list pgsql-admin

Whenever you get a finalized script including all the enhancements
you've been talking about,
I would really love to have a copy as I'm sure lots of people here
would. I think this is
something that should be included in the standard distribution.

Can I make a couple of suggestions?

1. Include a mail option to send the admin an email when the backup
succeeds or fails.
2. Call pg_stop_backup() if the script fails for whatever reason. You
can't run the script
    twice unless you stop the backup. I ran the script a few times to
see if I can get a
    PITR backup system going and due to directory permissions and
such and during basic
    testing, I had to manually call pg_stop_backup() after the script
exits abnormally.

Thanks very much for building this script and sharing it with us.
Many of us don't have the skills to
write such a script. I'm a Java programmer, but I have little bash
scripting skills, so this
is very much appreciated.

____________________________________________________________________
Brendan Duddridge | CTO | 403-277-5591 x24 |  brendan@clickspace.com

ClickSpace Interactive Inc.
Suite L100, 239 - 10th Ave. SE
Calgary, AB  T2G 0V9

http://www.clickspace.com

On Apr 2, 2006, at 10:14 AM, Rajesh Kumar Mallah wrote:

> On 4/2/06, Grega Bremec <gregab@p0f.net> wrote:
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>> Rajesh Kumar Mallah wrote:
>> |
>> | Instead of taking a round about method i am using the content of
>> the
>> | file, (This was also suggested by Andy at somepoint)
>>
>> After reading the docs again, that's what I would do as well,
>> indeed. :)
>>
>> | lately i feel that we should not be discussing the topic over here
>> | becoz it has less to do with postgresql and more of bash.
>>
>> I've been considering that seriously in the very first post I
>> wrote, but
>> since there seems to be a lot of people interested in a working,
>> flexible WAL archiving script, I decided to keep it on the list.
>> It is
>> an administration issue, afterall. I will stand corrected if someone
>> feels we're clogging their mailboxes.
>>
>> | ##############################################################
>> | #START WAL LOCATION: E/A9145E4 (file 000000010000000E0000000A)
>> | #CHECKPOINT LOCATION: E/A92939C
>> | #START TIME: 2006-04-01 14:36:48 IST
>> | #LABEL: base_backup_01-04-2006-14-36-45
>> | ###############################################################
>> |
>> | BACKUP_LABEL=$DATADIR/backup_label
>> | # get the like containing line START WAL LOCATION
>> |
>> | START_LINE=`grep -i  "START WAL LOCATION"  $BACKUP_LABEL`
>> | # strip something like 'START WAL LOCATION: E/A9145E4 (file '
>> from begin.
>> | START_LINE=${START_LINE/#START*file /}
>> | # strip ')' from end.
>> | START_LINE=${START_LINE/%)/}
>> | # REF_FILE_NUM is something like 000000010000000A00000068
>> | REF_FILE_NUM=$START_LINE
>>
>> Why not go for the entire filename?
>
>
> it takes a while (i dont know how much) for the .backup file to get
> archived and appear in the wal archive area. thats why i prefer to
> use the wal log filename (000000010000000A00000068) instead of
> something like 000000010000000A00000068.0A348A45.backup.
>
> Do you see any problem in the current approach ?
>  i have seen it working fine till now.
>
> Another area i was thinking to improve this script was to
> make it dig out all the tablespace folders to be archived by looking
> into PGDATADIR/pg_tblspc . This shall make the script more generic.
>
> pg_tblspc as contents like below:
>
>  $ ls -l
> total 0
> lrwxrwxrwx 1 postgres postgres 19 Mar 27 21:45 16391 -> /mnt/
> indexspace_new
> lrwxrwxrwx 1 postgres postgres 18 Mar 27 21:45 16392 -> /mnt/
> bigtables_new
>
> can you suggest the sane/recommended way to get the destination
> folders?( i was thinking find $PGDATADIR/pg_tblspc -type l -printf
> "%???????" )
> or do i parse output of ls !
>
> if above is done i see the script INPUT/OUTPUT'ACTIVITY as below
>
> INPUTS: PGDATADIR , WAL_ARCHIVE_DIR , LOCAL DUMP DIRECTORY
> OUTPUT: n/a
> ACTIVITY:
>
> 1. it shall take a base backup of PGDATADIR (minus pg_xlog) and
>     all tablespaces into *LOCAL* DUMP Directory
> 2. Frees disk space by removing unwanted LOG files in WAL_ARCHIVE_DIR
>
> i am waiting for my another machine to get fitted with 2 more drives
> so that i can test/develop scripts for the restoration part and modify
> the script for remote base backups and archiving. that shall
> happen in a week or so.
>
> thanks for your support till now.
>
> Regds
> Rajesh Kumar Mallah.
>
>
>>
>> Kind regards,
>> - --
>> ~    Grega Bremec
>> ~    gregab at p0f dot net
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