> -----Original Message-----
> From: LHC Computer Grid - Rollout
> [mailto:[log in to unmask]] On Behalf Of Burke, S (Stephen)
> Sent: maandag 17 januari 2005 17:46
> To: [log in to unmask]
> Subject: Re: [LCG-ROLLOUT] [ATLAS-LCG] Disk failure at Prague
>
> LHC Computer Grid - Rollout
> > [mailto:[log in to unmask]] On Behalf Of Jules
> Wolfrat said:
> > The VO doesn't have to notice, the sysadmins are supposed to
> > detect that
> > the RLS is broken (e.g. a disk crash) and have to restore,
> at least at
> > our site. And we keep backups at least for several weeks.
>
> I wasn't thinking of crashes so much as deliberate or
> accidental corruption
> by a user/hacker, which might well go un-noticed until
> someone tries to
> access one of the missing files.
That's true, but you must make a distinction between the database that
RLS is and the physical file itself. The file itself can be destroyed
while the RLS itself still thinks that the file is present. What you
need is some mechanism to check the integrity of the RLS, e.g. run every
night a consistency check on the RLS!
Jules
>
> Stephen
>
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