By C.J. Date
Offers an authoritative source for readers drawn to gaining perception into and realizing of the foundations of database platforms. offers strong grounding within the foundations of database expertise and offers a few rules as to how the sphere is probably going to increase sooner or later. New seventh variation. DLC: Database administration.
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Additional info for An Introduction to Data Base Systems
DCAF in Korea is much more difficult than CAF due to data files, which are physically apart by more than 10,000 km. In order to run the remote data that is currently stored in Fermilab, USA, we use SAM (Sequential data Access via Meta-data)  which consist of Kerberos rcp, bbftp, gridftp and rcp as transfer methods. We use the same GUI (Graphic User Interface) of CAF. The difference is only to select the analysis farm for the DCAF in Korea. Now, DCAF around world processes 40% of total CPU of the CDF experiment .
Coles Fig. 4 Site availability plots from April 2006 to March 2007 for two GridPP Tier-2 sites. The left plot shows that achieving high availability, at least according to the ops VO SAM test results is possible availability are indeed achievable as measured by the Site Availability Monitoring (SAM) tests. One draw back of this approach is that the tests currently only look at the operations (ops) Virtual Organisation (VO) results and do not correspond directly with user experience. Fig. 5 The average GridPP ATLAS test success rates seen across all GridPP sites during the first months of 2007.
The first represents the pledged disk in TB, the second the actual deployed from a snapshot in Q2 2007 and the third shows the disk actually being used by the LHC experiments at that snapshot time. The picture for disk shown in Fig. 3 is less good though it is clear that some sites are playing a more significant role than others. However, what is also clear from these results is that even where a lot of disk has been deployed it is not being used. HEP Grid Computing in the UK: MOVING Towards the LHC Era 51 Fig.