Status of Globus activities within INFN

Massimo SgaravattoINFN Padova

for the INFN Globus groupglobus@infn.it

Globus @ INFN WP “Installation and Evaluation of the Globus

Toolkit” of the INFN-GRID Project (WP 1) Goal: evaluate the Globus toolkit as a GRID

framework providing basic services Which services can be useful ? What is necessary to integrate/modify ? What is missing ?

Duration: 6 months Results of this first evaluation used to plan future

activities

Globus Project led by Ian Foster and Carl

Kesselman Basic research on GRID (resource

management, security, QoS, ...) Development of Globus Toolkit

Core services for GRID tools and applications

Globus ArchitectureApplications

Core ServicesMetacomputing

Directory Service

GRAMGlobus

Security Interface

Heartbeat Monitor

Nexus

Gloperf

Local ServicesLSF

Condor MPI

NQEEasy

TCP

SolarisIrixAIX

UDP

High-level Services and ToolsDUROC globusrunMPI Nimrod/GMPI-IO CC++

GlobusView Testbed Status

GASS

Tasks Security

To access GRID resources mechanisms for user authentication needed

Evaluation of GSI service

Information Service To discover the GRID resources (CPU, storage, network, …)

mechanisms to “publish” them must be defined Analysis of GIS service to “publish” information using a uniform and

standard interface

Resource Management Necessary a uniform interface to submit jobs on GRID resources

Uniform standard interface to different resource management systems Uniform standard language for task management Assessment of Globus GRAM service for resource allocation and

process management

Tasks Data Access and Migration

High performance and reliable tools needed to “manage” data (data transfers, wide area replica, …)

Assessment of Globus tools for data management (GASS, Globusftp, Replica Management tools)

Fault Monitoring Faults in a GRID environment must be promptly detected and

recovery mechanisms must be implemented Evaluation of HBM service for fault detection

Execution Environment Management Code migration (moving the application where the job will

actually be executed) as a possible implementation strategy Evaluation of GEM service to support code migration

Globus deployment Reduce complexity and manpower for Globus installation and

maintenance

Globus installed on ~ 30 machines in 11 sites

TORINO

PADOVA

BARI

PALERMO

FIRENZE

PAVIA

MILANO

GENOVA

NAPOLI

CAGLIARI

TRIESTE

ROMA

PISA

L’AQUILA

CATANIA

BOLOGNA

UDINE

TRENTO

PERUGIA

LNF

LNGS

SASSARI

LECCE

LNS

LNL

SALERNO

COSENZA

S.Piero

FERRARA

PARMACNAF

Status

ROMA2

Security (GSI) Already done:

Evaluation of the Globus security architecture We like the “one time login” paradigm, but some

improvements needed Globus certificates (for hosts and users) signed by INFN

certification authority On-going activities:

Definition and implementation of architecture of CAs Up to task force of the European DataGrid project

Periodic update of CRL “Management” of grid-mapfile (where the mappings

between local users and GRID users are defined) updates I.e.: a certain Globus resource must be available to all

members of a specific physics group

Information Service (GIS) Already done:

INFN MDS server serving Globus 1.1.1 and 1.1.2 installations (single LDAP server)

Lot of problems using the “default” American MDS server Definition and implementation of test architecture of GIS for

Globus 1.1.3 installations (distributed model) Web interface for browsing

On-going activities: Improvement of performance (Netscape LDAP server as top

level GIIS) Tests on performance and scalability

Results used to define and implement the GIS architecture Review the information gathered from the various

machines and published in the GIS

Dc=bo, Dc=infn,dc=it,o=grid

Bologna

GIIS

INFN ATLAS GIIS

GIIS

Dc=mi,Dc=infn,dc=it,o=grid

Exp=atlas, o=grid

Top Level INFN GIIS

Dc=infn,dc=it,o=grid

Milano

GIS Architecture (test phase)

GRIS

ImplementedImplemented using INFNGRID distribution

To be implemented

Resource Management (GRAM) Already done:

Job submission tests using Globus tools with real applications and in real production environments (GRAM as uniform interface to different underlying resource management systems [LSF, Condor, PBS])

Some bugs found and fixed Many many memory leaks !!! …

Some bugs can be solved without major re-design and/or re-implementation Two major problems:

Scalability Fault tolerance

Submission of Condor jobs to Globus resources (Condor-G and GlideIn) Evaluation of RSL as uniform language to specify resources

More flexibility is required Resource administrators should be allowed to define new attributes and users should be

allowed to use them in resource specification expressions (Condor Class-Ads model) Cooperation” between GRAM and GIS

The information on characteristics and status of local resources and on jobs is not enough (as local resources we must consider Farms)

The default schema must be integrated with other info provided by the underlying resource management systems or by specific agents

Resource Management (GRAM)

On going activities: Tests with GRAM API Identity a set of useful attributes of a

Condor pool, LSF cluster, PBS cluster that should be reported to the GIS, and integrate the default schema

Tests with MPICH-G2

Globus deployment Already done:

INFN-GRID 1.0 Non-precompiled Globus 1.1.3 + bug fixes Installation instructions (in particular for INFN customizations)

INFN-GRID 1.1 Precompiled Globus 1.1.3 for Linux Red Hat 6.x gsiwuftpd Support for LSF and Condor as underlying resource management systems Possibility to implement INFN customizations

Certificates signed by INFN CA Preliminary architecture for GIS

Installation instructions INFN-GRID 1.2

Besides INFN-GRID 1.1’s functionalities Support for Solaris 2.6 Support for PBS as resource management system Support for GDMP (for Linux)

Tool to upgrade INFN-GRID 1.1 INFN-GRID 1.2 Installation instructions

Globus deployment On-going activities:

Web software repository INFN-GRID 1.3

Fixes for Globus jobmanager memory leaks Support for Solaris 7 Full support for GDMP Distribution of various Globus compilations

(Kerberos, MPICH-G2) INFN-GRID toolkit available to DataGrid

partners Globus team interested to this toolkit

Data Management Already done:

Preliminary tests with GASS and gsiftp To do:

Tests with GlobusFTP and Replica Catalog Software (Globus Data Grid Alpha Release 2)

Other tasks Fault Monitoring (HBM)

Evaluation of HBM for fault detection (for “system” and “user” processes)

Data collectors (implementing automatic recovery mechanisms)

… but the HBM package is not seeing active development

Execution Environment Management (GEM) Evaluation of GEM as service for code migration … but the GEM service now provides only limited

capabilities (executable staging)

Other info http://www.infn.it/globus