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I hadn't realised there was actually any space in the AFS "work" directory. We could probably get rid of that. We can talk about it at the meeting incase someone else asked for it for a reason. On Fri, 27 Apr 2007, Leonard J. Moss wrote: > Renata Maria Dart wrote: >> On Fri, 27 Apr 2007, Young, Charles C. wrote: >> >> > Hi Renata, >> > >> > Thanks! I have a stupid question of what is AFS and what is NFS in this >> > context. Our work space is >> > >> > /afs/slac/g/atlas/work/<something> >> > >> > Where <something> can take you to one of several NFS servers, e.g. >> > >> > lrwxr-xr-x 1 YANGW root 27 Oct 18 2006 a -> >> > /nfs/sulky51/atlaswork.u1/a/ >> > lrwlrwxr-xr-x 1 gowdy root 25 Feb 13 2006 n -> >> > /nfs/surrey14/atlas >> > work/n/xr-xr-x 1 gowdy root 25 Feb 13 2006 c -> >> > /nfs/surrey13/atlaswork/c/ >> > >> > Is it a worry if my batch job writes directly to one of these areas >> > (rather than to local disk and copy at end of job)? Cheers. >> > >> >> Hi Charlie, yes the same concerns apply to writing to nfs space. [...] > > BTW, this is an example where some reorganization and addition > of some cloned volumes may save you a bottleneck later on. Currently, > /afs/slac/g/atlas is the mount point for a 500MB > RW volume and /afs/slac/g/atlas/work is the mount point for a > 5GB RW volume. However, the only thing currently in /afs/slac/g/atlas/work > are the one-letter symlinks to the various > NFS servers hosting the actual Atlas users' work space. The path > to users' work space is quite static, and ideally you'd like it > to be entirely in RO, and possibly replicated, volumes. However > that huge "work" volume is a tempting place to add lots of other > highly volatile RW directories. A very actively written directory in this > volume could slow down access to every Atlas user's work > area. Moreover, it doesn't do you can't clone the work volume > unless you also clone the top level g.atlas volume. > > -- /------------------------------------+-------------------------\ |Stephen J. Gowdy, SLAC | CERN Office: 32-2-A22| |http://www.slac.stanford.edu/~gowdy/ | CH-1211 Geneva 23 | |http://calendar.yahoo.com/gowdy | Switzerland | |EMail: [log in to unmask] | Tel: +41 22 767 5840 | \------------------------------------+-------------------------/