[workshop welcome graphics]

Transcription

1 [workshop welcome graphics] 1

2 Hands-On-Globus Overview Agenda I. What is a grid? II. III. IV. Globus structure Use cases & Hands on! AIP: Status and Plans 2

3 Introduction I: What is a Grid? 3

4 Old and new networks 7

5 Next step: Resource sharing: information processing power out of the socket $ submit_job submitting job requisitioning 7.3 Exaflops job successful. $ publish_paper compiling & publishing review process 2006.nature.447.pp OK. 8

6 What Resources can be shared? Efficient use of: CPU-Power storage space special hardware (sensors, telescopes, robots) installed applications and licenses Advantages: load balancing, scaling redundancy increased reliability uniform protocol interface for arbitrary resources 9

7 Again: What is a Grid? a.k.a. meta computing, distributed [parallel] computing A buzz word? A grid distributes, manages and coordiates resource sharing and collaboration without centralised control. A grid uses standardised, open, general-purpose protocols and interfaces. It can be (very) inhomogenious It includes security mechanisms, even though being spread out over multiple diverse domains. It is used for professional work It is more than the sum of ist parts and non-trivial. A grid is computers plus the internet plus some more things 10

8 A grid or not a grid? Operating Systems + the internet?? - client-server architecture, no automated network-wide components Botnets (for spamming or DOS-Attacks)? - centrally organised Peer-to-peer networks? - function limited to data sharing Cluster? - too homogenius, specialised and centralised. Localised, different operating and security systems (but a good thing anyway) SETI project or BOINC ( CPUs!)? - limited function, no cooperation. A low-end grid? 11

9 Peak of inflated expectations WherePeak are we on the Hype Curve? Gardner Group (US IT consulting company) August 2005 Trough of disillusionment 12

10 Middleware can you see it? or: that s all very nice, but the devil is in the details Grid middleware is a set of programs: demons, shell scripts, servers, java servlets, etc. Middleware software is focused to perform specific tasks within the grid The middleware extends the operating system to allow: dedicated servers to perform automated management tasks a machine to become part of the grid and share resources a user to access and use the grid. 13

11 Introduction II: Globus Components 14

12 Globus history 1998: Globus V1.0; currently V4.03. Work in progress Communities: Globus Alliance, Open Grid Forum de-facto standard in science, core elements are stable written mostly in C, web service layers Java and Python uses XML for web service documents open source Globus is the plumbing standard of the grid, a set of blocks and tools. Remember that grid resources are not very homogenious. 15

13 Main Globus Elements User Execution Management Status Information Service Globus Security Infrastructure Data Management Job Management Job Monitoring Resource Hardware: computers, storage, sensors provide: operating system, network access allow: program execution, local user management Globus Toolkit Middleware 17

14 The Globus Toolkit: Component Overview About a dozen core commands for command line Many services are available in different versions: as command line service and additionally as web (augmented) service. Some are just grid-improved versions of unix a commands They often use batch scripts (RLS, XML), models exist Lots of acronyms see handout! 19

15 Does all that work together (at least in theory)? [Cern grid flash] 23