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Question about files only around for sho

Posted by Anonymous 
Question about files only around for sho
May 10, 2006 08:01PM
Thanks all who replied to this.

Seeing as I'm just stepping into the world of backups, I wasn't too
sure about this kind of thing.

On 5/9/06, Eric Anderson <anderson < at > centtech.com> wrote:
Quote

Tim, I generally consider those transient files, meaning that if they
are only around for a single backup point, then they are probably not
needed long term.
I guess this is a good way to view it.

Quote

What I do in practice, is have 60 daily backups online, and 12 weekly
backups, along with 6 monthly. That way, I have 60 days to go back and
grab that transient file, then it's lost. If someone can recall a file
that existed for a single backup point over 2 months ago, I'd be
surprised. My users can barely recall the name of the file, let alone
what *month* it was created in.
Is this with rsnapshot? I thought it renamed the oldest daily to
create the weekly, which would make your weekly 60 days old ;-)
Or have you done something funky to it? I would be interested in how
that is setup.

Once again, thanks all who replied! Excellent answers, and you've
helped me understand what I was getting confused about!

Tim
--
Linux Counter user #273956

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Question about files only around for sho
May 10, 2006 07:33PM
Timothy White wrote:
Quote

Thanks all who replied to this.

Seeing as I'm just stepping into the world of backups, I wasn't too
sure about this kind of thing.

On 5/9/06, Eric Anderson <anderson < at > centtech.com> wrote:
Quote

Tim, I generally consider those transient files, meaning that if they
are only around for a single backup point, then they are probably not
needed long term.
I guess this is a good way to view it.

Quote

What I do in practice, is have 60 daily backups online, and 12 weekly
backups, along with 6 monthly. That way, I have 60 days to go back and
grab that transient file, then it's lost. If someone can recall a file
that existed for a single backup point over 2 months ago, I'd be
surprised. My users can barely recall the name of the file, let alone
what *month* it was created in.
Is this with rsnapshot? I thought it renamed the oldest daily to
create the weekly, which would make your weekly 60 days old ;-)
Or have you done something funky to it? I would be interested in how
that is setup.

That's correct - my weekly backups are 60 days old. I think of it not
like 'a week ago', but the farther back in time, the less likely it is
that I will need a file from a specific day, so removing 6 of 7 of the
backups is ok, and then even further out I go down to removing the rest
(so only 1 of 30 are left, ie the monthly's). I also have written a
perl script to build a 'restore' directory, that builds a softlink
structure that I can easily navigate by server, filesystem, and time of
backup, to find files, instead of looking at the daily/weekly/monthly
directories.

Eric

--
------------------------------------------------------------------------
Eric Anderson Sr. Systems Administrator Centaur Technology
Anything that works is better than anything that doesn't.
------------------------------------------------------------------------

-------------------------------------------------------
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Question about files only around for sho
May 09, 2006 05:36AM
Timothy White wrote:
Quote

OK, basically, if you have daily and weekly backups... Consider this.

Create a file on day 3, so it gets into that night's 'daily' backup.
Then delete it on day 4. That night, the backup will not have a link
to that file.
When the weekly occurs, that file will NOT be in the weekly backup!
The only chance of recovering that file, is before the next daily
backup for day 3!

What do people do about this? How do you solve it?

Thanks!

Tim
p.s. Please CC me as I'm not on the list

Tim, I generally consider those transient files, meaning that if they
are only around for a single backup point, then they are probably not
needed long term.

What I do in practice, is have 60 daily backups online, and 12 weekly
backups, along with 6 monthly. That way, I have 60 days to go back and
grab that transient file, then it's lost. If someone can recall a file
that existed for a single backup point over 2 months ago, I'd be
surprised. My users can barely recall the name of the file, let alone
what *month* it was created in.

Eric

--
------------------------------------------------------------------------
Eric Anderson Sr. Systems Administrator Centaur Technology
Anything that works is better than anything that doesn't.
------------------------------------------------------------------------

-------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
[sel.as-us.falkag.net]
_______________________________________________
rsnapshot-discuss mailing list
rsnapshot-discuss < at > lists.sourceforge.net
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Question about files only around for sho
May 09, 2006 05:01AM
OK, basically, if you have daily and weekly backups... Consider this.

Create a file on day 3, so it gets into that night's 'daily' backup.
Then delete it on day 4. That night, the backup will not have a link
to that file.
When the weekly occurs, that file will NOT be in the weekly backup!
The only chance of recovering that file, is before the next daily
backup for day 3!

What do people do about this? How do you solve it?

Thanks!

Tim
p.s. Please CC me as I'm not on the list
--
Linux Counter user #273956

-------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
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Question about files only around for sho
May 09, 2006 07:07AM
Timothy,

On Tue, 9 May 2006 19:41:15 +0800, Timothy White wrote:
Quote

OK, basically, if you have daily and weekly backups... Consider this.

Create a file on day 3, so it gets into that night's 'daily' backup.
Then delete it on day 4. That night, the backup will not have a link
to that file.
When the weekly occurs, that file will NOT be in the weekly backup!
The only chance of recovering that file, is before the next daily
backup for day 3!

What do people do about this? How do you solve it?
It sounds as normal behaviour for any backup system. If I create a file, then delete it the next minute, I bet it is not in my backup. Only if I had configured my backups to snapshot each minute, I would have a chance. So the solution is in the configuration. In my personal setup, I have only hourly backups, some 500 total. Each hour I get a backup, but I am not sure how long it will last, for I use my pc irregularly. But at least 500 hours...

regards,
Marc
--
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Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
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