How to order data sets for the PSI Tier-3
CMS uses the
PhEDEx system for its data management. The site's
local CMS administrator an order a data set for you.
- Identify the data by its official name (For current naming conventions, see this CERN Wiki entry) . You can look up the available data sets via the DAS. Make sure, that they exist. If a site has not correctly published the data, it cannot be fetched.
- Use the PhEDEx create transfer request page to order the dataset. You need to log in via your hypenews name/password (login link can be found in upper right screen corner ).
- The request will be approved/disapproved by the local PhEDEx data manager of the site. You will receive emails about the updates to your request.
- Please understand that at some point we will start to refuse requests with undefined group or retention time information, because the lack of this information severely impacts an efficient management of the storage space and will involve all of us in an email ping pong.
To see the currently stored data sets for the Tier-3 and the Swiss Tier-2 you can look at these
PhEDEx pages.
Note, that for the T3_CH_PSI we do only have channels from a limited number of sites (mainly CSCS and FZK, look
here for a table). Currently PhEDEx will only download data sets which it can get via such a direct link. So, if a set is not already located at one of these directly linked centers, it is necessary to order the data to one of them as well (
order it to both T2_CH_CSCS and T3_CH_PSI. We cannot guarantee that FZK would carry out a request to stage the data on their storage). The request page will show you all locations of copies of the data set you want to order.
Note: Even though PhEDEx had the capability to transfer data through multiple hops, this has been currently deactivated, since it causes problems with the management of the storage space of the centers that are used as caches.
CMS Dataset Bookeeping Service - aka DBS