On Thu, Jan 24, 2008 at 03:26:12PM +0000, Greig Alan Cowan wrote:
> Hi all,
>
> I've managed to get my hands on some concrete information regarding ATLAS
> space tokens that are required at Tier-2s (see attached mail).
>
> In summary, we want:
>
> - 2 TB for ATLASDATADISK
> - 1 TB for ATLASENDUSER (better with 2 TB)
> - 1 TB for ATLASMCDISK (better with 2 TB)
> - 1 TB for ATLASGRPTOP
>
> The sizes of the spaces are applicable to all ATLAS sites. I still have to
> clarify whether ATLASGRPTOP is required at all sites, or if different
> ATLASGRPxxx token descriptions need created at different T2 sites.
>
> Now, need to get something similar from CMS, assuming they want to use
> spaces...
I have no idea how spaces work in the DPM side but for dcache this is
going to be very tricky since the space allocation is in terms of pools.
What is a site to do if for example the pools allocated to atlas are
1.5TB or worst 3TB each?
What about changes in the future? What am I supposed to do if atlas
requests changing the space allocated for ATLASMCDISK for example to
1.5TB and ATLASDATADISK to 3.3TB at the future? Are we supposed to start
juggling partitions/pools around now?
Cheers,
Kostas
PS> Given that atlas has less than 1TB at IC (it's not one of the
"supported" experiments) it's probably a moot point for us.
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