[linux-lvm] Simple scripts for use in automated backups?

[linux-lvm] Simple scripts for use in automated backups?

[Charles Marcus]

Hello again,

Sorry to flood the list with newbie questions... if there is a better 
list for things like this, please let me know...

I'm still fairly new to linux (coming from windows world), and enjoying 
the freedom, but as far as scripting goes - well, to call me a noob is 
being kind...

Would any kind souls be willing to share some basic scripts that can be 
used to activate a snapshot, then 'do x' (this would be my rsnapshot 
command), then release the snapshot? The part that I don't have a clue 
about is how to check for errors - ie, did the snapshot activate ok? Did 
it release ok?...

Thanks for any responses, including decent how-to's, etc...

-- 

Best regards,

Charles

Re: [linux-lvm] Simple scripts for use in automated backups?

[Dan Kegel]

Charles Marcus <CMarcus@media-brokers.com> wrote:
>  Would any kind souls be willing to share some basic scripts that can be
> used to activate a snapshot, then 'do x' (this would be my rsnapshot
> command), then release the snapshot? The part that I don't have a clue about
> is how to check for errors - ie, did the snapshot activate ok? Did it
> release ok?...

Here's a few links I dug up a couple weeks ago on how
people use lvm to back up mysql:

http://en.oreilly.com/mysql2008/public/schedule/detail/252
http://forum.mysqlperformanceblog.com/s/m/782/
http://lenz.homelinux.org/mylvmbackup/
http://jcole.us/blog/archives/2006/04/25/plugin-based-backup-for-mysql/
http://www.mysqlperformanceblog.com/2006/08/21/using-lvm-for-mysql-backup-and-replication-setup/

Re: [linux-lvm] Simple scripts for use in automated backups?

[Tomasz Chmielewski]

Charles Marcus schrieb:
> Hello again,
> 
> Sorry to flood the list with newbie questions... if there is a better 
> list for things like this, please let me know...
> 
> I'm still fairly new to linux (coming from windows world), and enjoying 
> the freedom, but as far as scripting goes - well, to call me a noob is 
> being kind...
> 
> Would any kind souls be willing to share some basic scripts that can be 
> used to activate a snapshot, then 'do x' (this would be my rsnapshot 
> command), then release the snapshot? The part that I don't have a clue 
> about is how to check for errors - ie, did the snapshot activate ok? Did 
> it release ok?...

*Usually*, a command exits with code 0 if it finishes with a success.

In bash, you can check the exit code with $? variable.

So:


lvmcommand --option1 --option2

if [ $? -eq 0 ] ; then
    do_this
else
    do_that
fi

Re: [linux-lvm] Simple scripts for use in automated backups?

[Charles Marcus]

>> Would any kind souls be willing to share some basic scripts that can 
>> be used to activate a snapshot, then 'do x' (this would be my 
>> rsnapshot command), then release the snapshot? The part that I don't 
>> have a clue about is how to check for errors - ie, did the snapshot 
>> activate ok? Did it release ok?...

> *Usually*, a command exits with code 0 if it finishes with a success.

<snip>

> Here's a few links I dug up a couple weeks ago on how
> people use lvm to back up mysql:

Thanks! helps a lot...

-- 

Best regards,

Charles

Re: [linux-lvm] Simple scripts for use in automated backups?

[Stuart D. Gathman]

On Wed, 23 Apr 2008, Tomasz Chmielewski wrote:

> *Usually*, a command exits with code 0 if it finishes with a success.
> 
> In bash, you can check the exit code with $? variable.
> 
> So:
> 
> 
> lvmcommand --option1 --option2
> 
> if [ $? -eq 0 ] ; then
>     do_this
> else
>     do_that
> fi

Even easier, the shell considers exit code 0 as "true", so the above is simply:

if lvmcommand --option1 --option2; then
    do_this
else
    do_that
fi

-- 
	      Stuart D. Gathman <stuart@bmsi.com>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
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