EGEE-II INFSO-RI-031688 Enabling Grids for E-sciencE www.eu-egee.org EGEE II - Network Service Level Agreement (SLA) Establishment EGEE’07 Mary Grammatikou.

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Presentation transcript:

EGEE-II INFSO-RI Enabling Grids for E-sciencE EGEE II - Network Service Level Agreement (SLA) Establishment EGEE’07 Mary Grammatikou (GRNET)

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 2 Outline Introduction Model of SLA establishment Monitoring of SLAs GRIDCC project SLA application scenario Measurements Conclusions – Future Work

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest Introduction Whenever a GRID application requires specific levels of QoS for an end-to-end (e2e) path between two Resource Centers (RC) then an e2e SLA has to be established The e2e SLA provides the technical and administrative details to perform –Maintenance –Monitoring –Troubleshooting Synthesis of end-to-end SLA based on individual domain SLAs

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest SLA parts ALO (Administrative Level Object) –Contacts –Duration –Availability –Response times –Fault handling procedures SLO (Service Level Object) –Service instance scope –Flow description –Performance guarantees –Policy profile –Excess traffic treatment –Monitoring infrastructure –Reliability guarantees: max downtime (MDT), time to repair (TTR)

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 5 2 stage SLA provision model Service Reservation and Activation Stage 1: Service Reservation (SR) stage: –PIP reservation in extended QoS network –border-to-border SLA (GEANT/NRENs SLAs)‏ Stage 2: Service Activation (SA) stage : –Configuration of the routers in the last mile network –end-to-end SLA (b2b SLA + NREN client domains’ SLAs)‏ 2-Stage Provisioning Model due to: Manual configuration of the routers Lead time between service request and service reservation (currently 2 working days)

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 6 Stage 1: Service Reservation (SR)‏ Reservation via AMPS (Advanced Multi-domain Provisioning System) servers of hosting NRENs and GEANT AMPS system: –In development stage by the GEANT project –Management of the whole PIP provisioning process from user request through to the configuration of the appropriate network elements ENOC identifies involved GEANT/NREN domains GEANT/NRENs provide individual SLAs Synthesis of b2b SLA: performed by ENOC based on reported GEANT/NRENs SLAs

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 7 Stage 2: Service Activation (SA)‏ ENOC verifies that the reservation in the extended QoS domain is still effective and retrieves it Checks if NREN client domains (MAN/campus/institution) can support the request NREN client domains provide their SLAs ENOC produces e2e SLA based on: –reported NREN client domains’ SLAs –b2b SLA from stage 1

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 8 Monitoring of SLAs ENOC queries perfSONAR monitoring tools (BWCTL, OWAMP application) –BWCTL: BandWidth ConTroLler –OWAMP: One Way Active Measurement Protocol (OWD, Packet Loss) If a problem occurs: –ENOC identifies & notifies responsible domain –Otherwise : ENOC (not able to isolate the problem) informs GEANT PERT (Performance Enhancement Response Team)‏ Reaction-Repair according to SLAs ENOC checks SLA compliance

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 9 SLA monitoring measurements e2e Metrics: –OWD (One Way Delay)‏ –Packet Loss –Bandwidth –TTR (Time To Repair)‏ From trouble ticket issue to recovery, per violation –MDT (Maximum DownTime)‏ Maximum total TTRs for all violations in a given period Performance metrics Reliability metrics

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest GRIDCC project (1)‏ Collaboration between EGEE-II and GRIDCC project GRIDCC (Grid enabled Remote Instrumentation with Distributed Control and Computation), is a EU FP6 project Aims to provide access to and control of distributed complex instrumentation The goal of GRIDCC is to remotely operate and monitor scientific equipment using the grid’s massive memory and computing resources for storing and processing data generated by this kind of equipment

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 11 GRIDCC project (2)‏ IE (Instrument Element): – unique concept to GRIDCC – collection of services to configure, partition and control the physical instrument Remote control and monitoring of Instruments and Sensors Perfect integration between control, data acquisition and grid based data storage and data processing Human interaction with Grids and Enactment of complex workflows via the Virtual Control Room (collaborative environment)

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 12 SLA application scenario Remote control of IE located in Legnaro/INFN (ITALY)‏ and GEANT Transfer of data produced by the IE to a storage node in Athens/IASA (GREECE)‏ E2e path between INFN and IASA: –INFN-GARR-GEANT-GRNET-IASA Network performance guarantees described in e2e SLA (capacity and packet loss)‏ Monitoring of the SLA through available monitoring tools (in this test we used perfSONAR)‏

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 13 Initial SLA test GRIDCC application tests: –1 st test: Between IASA (GRNET) and INFN (GARR)‏ and –2 nd test: Between IASA (GRNET) and GEANT E2e PIP path via AMPS desirable to ensure the network performance metrics (One Way Delay, Packet Loss, Bandwidth)‏ AMPS in production phase in GRNET and GEANT and in progress in GARR –1 st test: non-PIP path between GRNET and GARR –2 nd test: PIP enabled path between GRNET and GEANT

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 14 Status of Current SLA tests PIP request between GRNET and GEANT approved –GRNET uses the ANS (Intra GRNET provisioning) tool as Interface to the AMPS tool (automatically) GRIDCC Grid applications for the remote control of the instruments installed in the end sites (IASA, GEANT, INFN) PerfSONAR monitoring tools installed in end sites RRD tool for the graphical representation of the measure data has been installed E2e network measurements taken without PIP (IASA  INFN) Measurements without & with PIP (IASA  GEANT)

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 15 Current Status (2) Contact individual domains (IASA, GRNET, GEANT, GARR, INFN) to fill the SLA templates PIP configuration of the routers in GRNET and GEANT - completed Monitoring procedure followed during the SLA duration supported by PerfSONAR –No fault identification during the SLA duration

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 16 Non-PIP Measurements IASA-INFN (1/2)‏ Bandwidth Packet loss

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest 17 Non-PIP Measurements IASA-INFN (2/2)‏ OWD from IASA to INFN and backwards

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest Non-PIP Measurements IASA-GEANT Packet LossBandwidth IASA-GEANT Delay IASA-GEANTDelay GEANT-IASA

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest PIP Measurements IASA-GEANT Packet Loss Bandwidth IASA-GEANTDelay GEANT-IASA Delay IASA-GEANT

Enabling Grids for E-sciencE EGEE-II INFSO-RI EGEE’07, 1-5 October, 2007, Budapest Conclusions - Future work More stability and better performance in PIP measurements than non-PIP More NRENs should support PIP service so that e2e path becomes PIP compliant –better performance will be achieved than what it is now Automatic PIP request can be achieved via the AMPS tool installed in all domains SLA installation procedure should also become more automatic We will continue the experiments with bigger amount of control data, in order to test the SLA procedure more effectively (including and PIP in GARR domain)