Incremental Dumps question

[Robert Denton <ro...@headsprout.com>]

I would like to leverage dumpfiles as a backup mechanism for my repo.  I would like to do a weekly dump with nightly incremental dumps.  Would the following accomplish this goal?

in crontab:
1 12 * * 0 root svnadmin dump /svn/repo > /svn/dumpfiles/repo_dump

in cron.daily:
svnadmin dump --incremental /svn/repo >> /svn/dumpfiles/repo_dump

I guess my questions are:  Is the --incremental switch capable of determining where the dumpfile left off, such that I do not need to specify revision numbers via the -r switch?  Also, can I use the append operator (>>) to append the incremental dump to the original dumpfile, or is it necessary to create a new dumpfile each night?

Thanks!

Robert

Re: Incremental Dumps question

[Vasili Sviridov <vs...@exceede.com>]

Robert Denton wrote:
> I would like to leverage dumpfiles as a backup mechanism for my repo.  
> I would like to do a weekly dump with nightly incremental dumps.  
> Would the following accomplish this goal?
>
> in crontab:
> 1 12 * * 0 root svnadmin dump /svn/repo > /svn/dumpfiles/repo_dump
>
> in cron.daily:
> svnadmin dump --incremental /svn/repo >> /svn/dumpfiles/repo_dump
>
> I guess my questions are:  Is the --incremental switch capable of 
> determining where the dumpfile left off, such that I do not need to 
> specify revision numbers via the -r switch?  Also, can I use the 
> append operator (>>) to append the incremental dump to the original 
> dumpfile, or is it necessary to create a new dumpfile each night?
>
> Thanks!
>
> Robert
svnadmin help text clearly states that

"If --incremental is passed, then the first revision dumped will be
a diff against the previous revision, instead of the usual fulltext."

so it's not gonna track where you've left off. you need a bit more 
elaborate scheme. like storing last revision dumped in a text file, and 
then using that value as a "svnadmin dump -r $lastRev /svn/repo > 
/svn/dumpfiles/repo_dump.from$lastRev" or something like that.

V.

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Re: Incremental Dumps question

[Blair Zajac <bl...@orcaware.com>]

Robert Denton wrote:
> I would like to leverage dumpfiles as a backup mechanism for my repo.  I 
> would like to do a weekly dump with nightly incremental dumps.  Would 
> the following accomplish this goal?
> 
> in crontab:
> 1 12 * * 0 root svnadmin dump /svn/repo > /svn/dumpfiles/repo_dump
> 
> in cron.daily:
> svnadmin dump --incremental /svn/repo >> /svn/dumpfiles/repo_dump

It would be better to have the incremental dumps in your post-commit script so 
you don't loose any work if there is an issue.  Then we have a crontab use find 
-mtime +14 to remove incrementals.

Regards,
Blair

-- 
Blair Zajac, Ph.D.
CTO, OrcaWare Technologies
<bl...@orcaware.com>
Subversion training, consulting and support
http://www.orcaware.com/svn/

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