Doing Cyrus *right* for a large installation

[LALOT Dominique]

2009/1/15 Rudy Gevaert <Rudy.Gevaert at ugent.be>

> Andrew Morgan wrote:
>
> > For those of you running large installations, how do you back them up?
>
> We have 7 backends:
>                       400G  320G   81G  80% /mail/mail1
>                       400G  273G  128G  69% /mail/mail2
>                       450G  390G   61G  87% /mail/mail3
>                       400G  322G   79G  81% /mail/mail4
>                       400G  270G  131G  68% /mail/mail5
>                       450G  397G   54G  89% /mail/mail6
>                        50G  4.8G   46G  10% /mail/mail7
>
>
> For mail1-6 incremental backup time takes between 2h and 7h, we suspect
> a storage (misconfiguration) issue.


You can have a look at file fragmentation. We noticed severe degradation on
ext3fs. More than 60% of the spool was fragmented. Try a filefrag on your
data. To correct it, you have to copy to a fresh new spool

Dom


>
>
> Fulls take a lot longer, but I can't give you any time estimates now.
>
> For the moment we don't backup the replica's.  Nor use them.  But we
> could do it.
>
> We are 'planning' a storage migration too the coming months.
>
> Rudy
> --
> -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> Rudy Gevaert          Rudy.Gevaert at UGent.be          tel:+32 9 264 4734
> Directie ICT, afd. Infrastructuur ICT Department, Infrastructure office
> Groep Systemen                    Systems group
> Universiteit Gent                 Ghent University
> Krijgslaan 281, gebouw S9, 9000 Gent, Belgie               www.UGent.be
> -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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>



-- 
Dominique LALOT
Ingénieur Systèmes et Réseaux
http://annuaire.univmed.fr/showuser?uid=lalot
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