Me myself and gd
This presentation is the property of its rightful owner.
Sponsored Links
1 / 16

Me, Myself and GD PowerPoint PPT Presentation


  • 57 Views
  • Uploaded on
  • Presentation posted in: General

Me, Myself and GD. Felix Ehm. Location. HARIBO. Little Introduction. Introduction Fellow IT-GD-ITR Oliver, Laurence as supervisors Andreas, Joachim, Gergo, Louis, Maria, Di, Juha, Ricardo (currently) 28 years old Activities EGEE information System GLUE 2.0 GSTAT 2.0 VOMRS.

Download Presentation

Me, Myself and GD

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Me myself and gd

Me, Myself and GD

Felix Ehm


Little introduction

Location

HARIBO

Little Introduction

  • Introduction

    • Fellow

    • IT-GD-ITR

    • Oliver, Laurence as supervisors

    • Andreas, Joachim, Gergo, Louis, Maria, Di, Juha, Ricardo

    • (currently) 28 years old

  • Activities

    • EGEE information System

    • GLUE 2.0

    • GSTAT 2.0

    • VOMRS

Felix Ehm, CERN 2008


Me myself and gd

The EGEE Information System

Felix Ehm, CERN 2008


The egee information system

The EGEE Information System

  • What is it ?

    • Decentralized information system providing ways to discover services in a Grid Infrastructure

    • Hierarchical structure of BDIIs (Berkley Database Information Index)

    • Uses the OpenLDAP server (and Berkley database) internally

    • Essential part of the instrastructure

  • What is it used for ?

    • Publishing Grid resource/service status information

    • Matchmaking of jobs/resources

    • Monitoring

    • Accounting

  • Who uses it ?

    • Nearly every gLite component (SE, CE, WMS, UI, ..)

Felix Ehm, CERN 2008


The egee information system1

Information Flow

The EGEE Information System

  • Architecture

    • Resource-, Site- and Top-Level BDII

    • One core component (BDII)

    • Each level caches information

    • Information flow follows ‘pull’ principle

    • Data format is LDIF

    • DB is recreated every 2min

  • Facts and Figures

    • 70 top level BDIIs worldwide

    • 256 site level BDIIs

    • Refresh rate 2-5 min for top level

    • Data size ~32 MByte LDIF data (30sec to add)

    • Top-level at CERN handles 4 Million requests/day and serves the full database within 2,5sec; 8 head nodes at 20-30% averaged CPU load

    • BDII scales linearly (~32% speedup/additional core)

    • Requesting big data sizes >1MByte slows the system down

    • Many supported platforms

Felix Ehm, CERN 2008


The egee information system2

o=grid

o=infosys

Entries

TimeToAdd

TimeToSearch

ServedRequests

The EGEE Information System

  • How am I involved ?

    • Performance tests

    • Developments

      • Compressed Content Exchange mechanism (32MByte reduced to 3.3MByte)

      • BDII statistics

      • Monitoring Information System infrastructure using Nagios

Felix Ehm, CERN 2008


Me myself and gd

GLUE Schema

Felix Ehm, CERN 2008


Glue schema

GLUE Schema

  • What is it ?

    • Grid Laboratory Unified Environment

    • Defines a common conceptual data model to be used for Grid resource/service discovery

    • Working group part of the OpenGridForum (OGF)

    • Available as Version 1.3 (http://forge.ogf.org/)

  • Latest News :

    • GLUE 2.0 in progress :

      • Elaborated in respect of 1.3 problems

      • Not backward compatible to 1.3

      • Goes to public comments end of April

  • How am I involved ?

    • Chairing storage schema discussion

    • Render relational model of schema

Felix Ehm, CERN 2008


Me myself and gd

GSTAT 2.0

Felix Ehm, CERN 2008


Gstat

GSTAT

  • What is GSTAT ?

    • Displays summarized information about a Grid infrastructure

    • Content checking on IS

    • Monitor dynamic values from the information system

    • Database driven architecture where data is gathered by agents developed by Academica Sinica (Taipei)

Felix Ehm, CERN 2008


Gstat1

GSTAT

Felix Ehm, CERN 2008


Gstat2

GSTAT

Felix Ehm, CERN 2008


Gstat3

GSTAT

  • What is GSTAT ?

    • Displays summarized information about a grid infrastructure

    • Content checking on IS

    • Monitor dynamic values from the information system

    • Database driven architecture where data is gathered by agents developed by Academica Sinca (Taipei)

  • Why another version ?

    • “evolved over the past few years from a simple cgi script which displayed the summary of the grid infrastructure to a production service„

    • Optimizing the visualization: CERN-PROD html page 500KB (only source)+744 pictures each 14KByte = 10,5MByte

    • New Requirements/Use Cases

  • What is the plan ?

Felix Ehm, CERN 2008


Me myself and gd

VORMS

Felix Ehm, CERN 2008


Vomrs

VOMRS

  • Just started

    • Take over work from Lanxin

    • Nothing to report (yet)

Felix Ehm, CERN 2008


Me myself and gd

End

Questions ?

Felix Ehm, CERN 2008


  • Login