manchester i beleive should consider itself multidisk as with having
two copies of each file file in the resilient dcache
On 20/02/06, Owen Synge <[log in to unmask]> wrote:
> The full set of choices are
>
> disk, tape, multidisk, other
>
> I feel that since resilient dcache is different to RAID 5/6 which I assume is "multidisk" and clearly not as unreliable (I hope) as a non redundant system "disk" and its not "tape" so maybe Manchester should be thought of as an "other" type SE.
>
> I shall confirm this with Glue people, and get back to you all later.
>
> Regards
>
> Owen
>
> On Thu, 16 Feb 2006 05:53:19 +0000
> Alessandra Forti <[log in to unmask]> wrote:
>
> > Hi Henry,
> >
> > as a sys admin it is not important but users might care to have different
> > type of data on different type of storage. i.e. "my ntuples on raid5,
> > experiment data on disk".
> >
> > >> SE_ARCH="multidisk"
> > >> So we can expect that this is correct.
> >
> > how do you define resilient dcache multidisk or disk?
> >
> > cheers
> > alessandra
> >
> >
> > On Wed, 15 Feb 2006, Henry Nebrensky wrote:
> >
> > > Obviously I wasn't there; sorry if this retreads long discussion:
> > >
> > > On Wed, 15 Feb 2006, Owen Synge wrote:
> > >
> > >> Minutes of storage phone conference 15 Feb 2006
> > > ...
> > >> 4. AOB
> > >> Should YAIM field SE_ARCH be populated with "multidisk" for Raid systems?
> > >> We suspect this is the case. the options are
> > >> "disk, tape, multidisk, other"
> > >> and the default is
> > >
> > > Where does this value end up being used - it looks like something for the
> > > information system?
> > >
> > > [As an end user, the technology underlying a single filesystems isn't
> > > particularly relevant; OTOH if the SE is a front-end to several separate
> > > disk volumes/partitions, then "total free space" won't be the same as
> > > "biggest file that can be uploaded" which is kinda important!]
> > >
> > > Thanks
> > >
> > > Henry
> > >
> > > --
> > > Dr. Henry Nebrensky [log in to unmask]
> > > http://people.brunel.ac.uk/~eesrjjn
> > > "The opossum is a very sophisticated animal.
> > > It doesn't even get up until 5 or 6 p.m."
> > >
> >
> > --
> > ********************************************
> > * Dr Alessandra Forti *
> > * Technical Coordinator - NorthGrid Tier2 *
> > * http://www.hep.man.ac.uk/u/aforti *
> > ********************************************
>
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