EMI Compute Elements comparison chart

Information, accounting  
Publishing information about itself GLUE2, GLUE1.2/1.3, ARC GLUE2, GLUE1.3 GLUE2, UNICORE
Providing job status information (remote query)
Notifying about job status changes by notifications a b c
Collecting accounting information (usage record) APEL, SGAS, OGF-UR APEL, DGAS, OGF-UR OGF-UR
Authorisation, security  
User authorisation using Grid credentials and local policies
Mapping users to local UIDs
Act on behalf of users (delegation)
Possibility to use external policy decision service d
Task execution  
Downloading job description documents (pulling on behalf of users) - - e
Accepting job description documents pushed by users xRSL, JSDL, JDL JSDL, JDL JSDL
Converting Grid jobs to LRMS submission scripts PBS, LSF, SGE, SLURM, LoadLeveler, Condor, fork PBS, LSF, SGE, Condor (incomplete) PBS, LSF, SGE, SLURM, LoadLeveler, fork
Initialising pre-installed application environment -
Schedule job start (LRMS submission) for a certain time f -
Support for LRMS reservation features - -
Interrupting jobs upon user request
Restarting jobs upon user request
Cleaning up user/job session
Self-limiting behavior (no new jobs if the system is overloaded)
Data handling  
Accepting input files pushed by users
CE downloads job input files from arbitrary user-defined locations
CE provides job outputs to users (pulled by users)
CE uploads job outputs to arbitrary user-defined location on behalf of users
Multiple protocols supported for data transfer HTTP(S), GSIFTP, FTP, SRM, LFC HTTP(S), GSIFTP HTTP, GSIFTP, FTP, SCP, UNICORE
Caching input files - -
Throttle data transfer priorities - -
Integrated file management and data transfer capabilities g g
Configuration, administration  
Possibility to set up multiple front-ends for the same resource (load sharing)
Possibility to adjust LRMS submission script h h
Support for administrator-defined file systems (WORK, SCRATCH, ...) i
Works even if there is no common file system between the head node and the worker nodes -
Server logs
Log rotation
Job draining for maintenance
Remote service management using Grid credentials -
Monitoring instrumentation - - j

a e-mail only
b via CEMON service
c depends on LRMS
d In development
e Requires an extension
f Will not submit the job before the specified time
g Only for data associated with current jobs
h By manual intervention
i Within the A-REX file system structure

-- OxanaSmirnova - 11-Nov-2011

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Topic revision: r2 - 2011-11-11 - OxanaSmirnova
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