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Scalable concurrency control in a dynamic membership

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Augusto Ciuffoletti
Augusto Ciuffoletti
Technology
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Scalable concurrency control in a dynamic membership A. Ciuffoletti * – A. Asim ** * INFN-CNAF, Bologna, Italy ** University of Paris Sud-XI, Paris, France 3 rd CoreGRID Workshop on Middleware – June 2008
Problem statement ,[object Object],[object Object],[object Object],[object Object],[object Object]
A multi-token approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Our solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Closed loop control ,[object Object],[object Object],[object Object],[object Object],[object Object]
Membership maintenance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental results Decrease exponentially (good) Maximum at the minimum (bad) Average at 1.7 instead of 2.6 (bad) Waving? Due to buffering.
Experimental results The process converges (good!) Its dynamics are extremely fast (unexpectedly good) Number of token exceeds expectation (55 instead of 2!)
Experimental results All join events eventually received (good) Takes a long time (expected)
Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object]

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Scalable concurrency control in a dynamic membership

  • 1. Scalable concurrency control in a dynamic membership A. Ciuffoletti * – A. Asim ** * INFN-CNAF, Bologna, Italy ** University of Paris Sud-XI, Paris, France 3 rd CoreGRID Workshop on Middleware – June 2008
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  • 7. Experimental results Decrease exponentially (good) Maximum at the minimum (bad) Average at 1.7 instead of 2.6 (bad) Waving? Due to buffering.
  • 8. Experimental results The process converges (good!) Its dynamics are extremely fast (unexpectedly good) Number of token exceeds expectation (55 instead of 2!)
  • 9. Experimental results All join events eventually received (good) Takes a long time (expected)
  • 10.