Computer Science – Distributed – Parallel – and Cluster Computing
Scientific paper
2011-02-15
Computer Science
Distributed, Parallel, and Cluster Computing
6 pages, 1 figure, 4 tables. Conference proceedings for CHEP2010
Scientific paper
Solid State Disk technologies are increasingly replacing high-speed hard disks as the storage technology in high-random-I/O environments. There are several potentially I/O bound services within the typical LHC Tier-2 - in the back-end, with the trend towards many-core architectures continuing, worker nodes running many single-threaded jobs and storage nodes delivering many simultaneous files can both exhibit I/O limited efficiency. We estimate the effectiveness of affordable SSDs in the context of worker nodes, on a large Tier-2 production setup using both low level tools and real LHC I/O intensive data analysis jobs comparing and contrasting with high performance spinning disk based solutions. We consider the applicability of each solution in the context of its price/performance metrics, with an eye on the pragmatic issues facing Tier-2 provision and upgrades
Bhimji Wahid
Kenyon Mike
Skipsey Samuel C.
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