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efi.uchicago.educi.uchicago.edu
FAX update
Rob Gardner
Computation and Enrico Fermi InstitutesUniversity of Chicago
Sep 9, 2013
efi.uchicago.educi.uchicago.edu2
FAX Activities Overview
• Start from https://twiki.cern.ch/twiki/bin/view/AtlasComputing/MonitoringFax – Several notable issues in the SSB requiring attention
• Xrootd 3.3.3 and N2N updates– https://twiki.cern.ch/twiki/bin/view/AtlasComputin
g/Xrootd333Upgrade
– The status table shows a long way to go before this is finished.
efi.uchicago.educi.uchicago.edu3
Functional testing notification
• Problems are now reported to ADC cloud support lists on a daily basis
• Need to change to HC-like offline-online notification– Necessary before going into production
efi.uchicago.educi.uchicago.edu4
Stress testing
• Jobs from Ilija submitted using the HC framework• Submitted jobs to US ANALY queues and CERN_PROD• Conditions at each queue:
– Batch of 10 jobs, each coping data from from 7 remote sites– Each job xrdcp’s 10 ~4.5 GB files, randomly chosen from SMWZ FDR data– Total ~ 2.2 TB data to transfer in 70 parallel transfers
• Time to finish, events/s, MB/s for each job & Panda IDs so jobs can be investigated
• All jobs submitted through FDR web interface– http://ivukotic.web.cern.ch/ivukotic/FDR/index.asp
• n.b. we cannot in practice “guarantee” simultaneous starts of jobs, but the workload should be indicative of what generally could be expected.
• Speeds presented are averages per file, aggregates per link are x10.
efi.uchicago.educi.uchicago.edu5
Stress testing US + CERN
AGLT2 BNL_ATLAS BU CERN-PROD MWT2 OU_OCHEP_SWT2 SWT2_CPB0
20
40
60
80
100
120XRDCP US + CERN AGLT2
BNL-ATLAS
BU
CERN-PROD
MWT2
OU_OCHEP_SWT2
WT2
SOURCES
MB/
s
XRDCP MB/s destinationAGLT2 BNL_ATLAS BU CERN-PROD MWT2 OU_OCHEP_SWT2 SWT2_CPB
source
AGLT2 28.54 51.26 1.53 0.57 16.21 64.65 20.27BNL-ATLAS 26.55 81.22 2.97 8.92 14.22 20.28 5.73
BU 15.06 75.92 58.12 2.91 1.44 36.95 10.06CERN-PROD 1.65 24.82 1.15 82.33 1.89 12.66 11.04
MWT2 8.17 57.08 1.44 1.4 87.87 37.64 4.21OU_OCHEP_SWT2 108.83 78.63 68.78 0 88.26 0 9.64
WT2 5.33 7.2 0.68 1.69 6.11 14.73 7.39
Observations & questions• BNL the best as
destination• OU_OCHEP_SWT2
shows great results but was unable to serve to CERN or itself
• AGLT2 was faster to read from OU than itself
• Even using CERN as source or destination is not unreasonable
efi.uchicago.educi.uchicago.edu6
Stress testing T1s
Observations:• Very nice
rates• The only
problematic connection INFN-T1 to FZK
BNL-ATLAS CERN-PROD FZK INFN-T1 RAL0
10
20
30
40
50
60
70
80
90 XDRCP between T1s BNL-ATLASCERN-PRODFZKIN2P3-CCINFN-T1PIC
Source
MB/
s