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On Fri, 5 Jun 2009, Burke, S (Stephen) wrote: > Testbed Support for GridPP member institutes >> [mailto:[log in to unmask]] On Behalf Of A.J.Martin said: >>> Does storm have no provision for running multiple gridftp or rfio >>> servers? >> >> One can do this, but to match the raw lustre storage >> bandwidth, I would >> expect it would need ~8-10 10Gb equipped boxes just copying data >> to/from the storage so its clearly not a sensible long-term solution >> (since this would scale further when we add more storage). However, >> it is our full-back and we have a couple of spare machines ready to >> lash up something should posix i/o continue to not work for a while. > > I think it's clearly better if users can use the direct access, and > there shouldn't be any particular difficulty in doing it. However, while > a VO like atlas can adapt its frameworks so that everyone gets the right > access method for each site, there will probably always be VOs where > people just use gridftp everywhere as it's currently the only thing > which every SE supports, and which works whether the file is local or > remote. > > Stephen AFAIK gridftp works?...its just that it would a lot of time and expence to try to make it match the raw Lustre performance...we will look into adding a 10 Gb card to the new se node which improve things in the interim (the one it was supposed to have doesn't physically fit). cheers, Alex