Testbed Support for GridPP member institutes
> [mailto:[log in to unmask]] On Behalf Of Alessandra Forti said:
> It doesn't change the fact that the Tier2 storage is not a
> safe/permanent
> storage and this is not clear to the experiments. The only
> way to express
> it is to have a volatile flag or.... maybe we should introduce a new
> "nobackup" value.
I certainly don't think it's a good solution to try to change the
meaning of something which is already defined, even if it isn't used
yet. As I say you could publish something with the new "Capability"
attribute, but it would still need some agreement in the project or you
have the same problem, you publish it and everyone ignores it! (Also I
would suggest publishing "backup", implicitly making "nobackup" the
default ...) Also we introduced an extra SE type for the new schema,
disk-based SEs can be defined as "disk" or "multidisk" with the
intention that the latter would apply to RAID arrays or similar.
However, you might still want to publish the RAID type as a Capability.
> From somewhere we have to start. What do you suggest that we
> go to CERN and spend our time at the cantine? ;)
My personal attitude is that it isn't worth spending much time on
something unless I can see some chance of success. In the case of the
schema I'm trying to do things from the bottom up: we have managed to
get at least a small change in the schema, the next thing is to get
sites publishing the right things, then try to persuade the data
management people to add support in the middleware, and only then try to
persuade the experiments, once there's some faint chance that they might
be able to use these things and have them work properly. However, "glue"
is a fairly appropriate term, the speed of progress would make a snail
feel ashamed ... and essentially all of this has to be done by direct
advocacy, there is just no forum or body in LCG which decides these
things. So yes, going to CERN and hassling people is probably more
likely to be productive than discussing it in the dteam!
Stephen
|