Download - Klaster obliczeniowy WLCG – cz.I
Klaster obliczeniowy WLCG – cz.I
Alice::WTU::LCG - skład:
VOBOX alicluster.if.pw.edu.pl VM: saturn.if.pw.edu.pl
CREAM-CE aligrid.if.pw.edu.pl VM: saturn.if.pw.edu.pl
SE alix.if.pw.edu.pl ca 12 TB disk RAID6
DBII bdii.if.pw.edu.pl VM: saturn.if.pw.edu.pl
TORQUE torque.if.pw.edu.pl VM: saturn.if.pw.edu.pl
16x WN node10[57-72].grid4cern.if.pw.edu.pl IntelQ6600 8GBRAM13x WN node10[81-99].grid4cern.if.pw.edu.pl AMD-Athlon 2C 4GBRAM
NFS,WEB,NTP,NAT server neo1.if.pw.edu.pl ca 2 TB disk RAID5
SLC5 – 64bit, gLite 3.2 (ca 10.000 rpms SLC+ 1.000 gLite)3x APC UPS, 3x GB-eth switch
saturn.if.pw.edu.pl - HP DL385 4x Opteron 2.4GHz 4GB RAM + VMWare Infrastructure3
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LCG Information System Levels
• Resource level: Grid Resource Information Server (GRIS)• One GRIS on top of each CE, SE, RB, MyProxy (no WNs).
– Sensors and scripts get status of concrete resources statically (e.g. GlueCEUniqueID) or dynamically (e.g. GlueCEStateWaitingJobs)
• Site level: Grid Index Information Server (GIIS) – Compiles all the information of the different GRISs in a site.– LCG-2 recommends using a BDII instead of a GIIS
• Improves robustness and stability.• Called the site BDII.
• Top level: Berkeley DB Information Index (BDII) – Keeps all Grid information about the VOs (generally only one). – Stores information from local BDIIs or GIISs in its database. – Only queries sites that are included in a configuration file.
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Each site can run
a BDII. It collects the information coming from the BDIIs/GIISs
At each site, a site GIIS collects the information
given by the GRISs
Local GRISs run on CE, SE, RB, MyProxy at each site and report dynamic and static information
Abbreviations:BDII: Berkeley DataBase Information Index
GIIS: Grid Index Information Server
GRIS: Grid Resource Information Server
LCG Information System Hierarchy
From LCG2.3.0 site GIIS has been replaced by“site” BDII
Para ver esta película, debedisponer de QuickTime™ y deun descompresor TIFF (LZW).
Para ver esta película, debedisponer de QuickTime™ y deun descompresor TIFF (LZW).
LCG Information System Hierarchy
RB Local GRIS
SELocal GRIS
CE Local GRIS
BDII-A BDII-B
SELocal GRIS
SELocal GRIS
CE Local GRIS
SELocal GRIS
BDII-C
Site 1 Site 2 Site 3
Site BDII Site BDII Site BDII
Old AliEn Framework
A liE n S e rvic e s
R D B M S
D BD rive r
U se rInte rfac e
B aseC lie nt
C lus te rM o nito r
B as eC lie nt
P roc e s sM onitor
B aseC lie nt
C o m putingEle m e nt
B aseC lie nt
C E
Alic eAtlas
Sto rageEle m e nt
B as eC lie nt
SE
FTD
B aseC lie nt
IS
B aseC lie nt
D BP ro xy
B aseC lie nt
L o gger
B as eC lie nt Authe
n
B aseC lie nt CP U
S erver
B as eC lie nt
Se rve rSe rve r
Se rve r
U se rApplic atio n
(C /C + + )
LD AP
W e bP o rtal
B as eC lie nt
P o r tal
R B
B aseC lie nt
Se rve rSe rve r
100% perl5
SOAP
LocalSiteelements
Centralservices
User
AliEn ‘Pull’ Protocol• One of the major differences between ALiEn and LCG
grids is that AliEn uses the ‘pull’ rather than ‘push’ protcol.• EDG/Globus model:
• ALiEn model:
user server
ResourceBroker
user server
ResourceBroker
job
list
Resource Broker
T ier0
T AS K Q UEUE
CP US erverACCT
REM O T ES IT E
Rem oteQ ueue
Clus terM onitor
Job
1 Pro ce ssM o n ito r
Job
1 P ro ce ssM o n ito r
Job
2 P ro ce ssM o n ito r
J ob
n P ro ce ssM o n ito r
ACCT
REM O T E S IT Eor
AN O T HERG RID
Rem oteQ ueue
Clus terM onitor
AliEnS erver
EDG /G lo b us
“Pull” instead of traditional “Push”
architecture
Broker
Authen
Logger
TransferBroker
IS
TransferOptimiser
EDG/Globus
http://www.if.pw.edu.pl/~alix/