Performance Analysis of the Optical Link. The Storage Resource Manager (SRM). Detailed performance analysis of the CERN-RAL link was carried out using UDPmon (http://www.hep.man.ac.uk/u/rich/net/) . Tests ensured that no significant packet loss was occurring.
The Storage Resource Manager (SRM)
Detailed performance analysis of the CERN-RAL link was carried out using UDPmon (http://www.hep.man.ac.uk/u/rich/net/). Tests ensured that no significant packet loss was occurring.
dCache provides a massive parallel gridftp service to over 120TB of storage.This provides an SRM front end and HSM capability to a Storage Tape Robot. Local tests show that the base configuration (4 disk servers) is capable of almost 4Gb/s I/O rate. (http://www.dcache.org/)
The UK Particle Physics Tier1 Service
High Performance Data Transfer for the LHC Service Challenges
The LHC Service Challenge Timeline and Milestones
LHC Service Challenge
By September 2006, Tier-1 Centres such as the GRIDPP Tier-1 Centre at RAL must develop and put in place infrastructures to cope with sustained data rates of 400MB/s from CERN. In order to meet this challenge, a number of “Service Challenges” are planned between now and the start of LHC data taking in 2007 (https://uimon.cern.ch/twiki/bin/view/LCG/LCGServiceChallenges)
The UK’s prototype optical private network (OPN) to CERN
The prototype OPN service has been provided by the UKLIGHT project managed by UKERNA. Four dedicated 1Gb/s links have been provisioned between RAL and CERN. This is planned to be replaced by a dedicated 10Gb link over SuperJanet 5 in the second half of the year.(http://www.uklight.ac.uk/).
The LCG 3D project
Globally replicated, low volume (tens of terabytes) relational databases will compliment the streamed physics data. (http://lcg3d.cern.ch/)
Throughput monitoring by RGMA
Sustained data rates of over 170MB/s have been achieved between CERN and RAL.The LCG project uses R-GMA (http://www.r-gma.org/) to capture this data from global producers such as the RAL Tier-1 for presentation in near to real time monitoring pages available on the LCG Service Challenge website.