Dear sysadmins,
as several people pointed out, there is lack of understanding why do
experiments use Grid. And since sysadmins are not members of all the
experiment-specific mailing lists, they have little chance of learning
it. I feel like I have to clarify several points:
1. Mailing lists are typically opened for posting only by the members,
to protect it from SPAM. So please *join* [log in to unmask] or such
before posting there.
2. Experiment representatives do not usually read LCG-ROLLOUT mailing
list, because it is expected to deal with, well, LCG rollout.
3. Experiments do run in a production mode. The recent LCG review stated
that the LCG is far from being in a production state, but I'd like to
see it proven wrong. So please don't be surprised to see files arranged
"as if they run production". It's not "if", they *DO* run production,
and each bit of data is needed in long term (months and years).
4. Experiments perceive Storage Elements as *STORAGE* elements. They
expect the files to stay there. And they can not move them elsewhere.
Please do not advertise your facility as a Storage Element if it is
*NOT* a Storage Element.
5. When your Storage Element is full, remove it from the Information
System, or press the Data Management folks to develop a better solution.
Do not stop PBS queues, as the jobs may well write to another Storage
Element, not yours.
To summarise, we seem to be asked to move our files from nearly
everywhere. I guess everybody realizes it's very difficult, and BTW,
we'll be producing 150% of what we have now in nearest 3 months. Thus a
removal of 7% or what won't help. We really expected the storage
facilities to be such, esp. Tier1-scale centers.
Oxana
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