By Alessandro Bassi, Micah Beck, Terry Moore (auth.), Alain Jean-Marie (eds.)
This ebook constitutes the refereed complaints of the seventh Asian Computing technological know-how convention, ASIAN 2002, held in Hanoi, Vietnam in December 2002.
The 17 revised complete papers offered including invited contributions have been rigorously reviewed and chosen from 30 submissions. The convention used to be dedicated to net computing and modeling, grid computing, peer-to-peer platforms, and cluster computing. one of the concerns addressed are scalable infrastructure for worldwide facts grids, allotted checkpointing, checklist coloring, parallel debugging, combinatorial optimization, video on call for servers, caching, grid environments, community enabled servers, multicast conversation, dynamic source allocation, site visitors engineering, path-vector protocols, Web-based net broadcasting, Web-based middleware, and subscription-based web companies.
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Additional info for Advances in Computing Science — ASIAN 2002: Internet Computing and Modeling, Grid Computing, Peer-to-Peer Computing, and Cluster Computing 7th Asian Computing Science Conference Hanoi, Vietnam, December 4–6, 2002 Proceedings
In this case, the waiting time is the replay time of the uninteresting area as shown in Figure 3, where users want to replay (re-execute) only the area after the distributed breakpoint. This method allows us to construct recovery lines more flexible than other methods by supporting recovery lines at both consistent and inconsistent global checkpoints; the waiting time is thus reduced. The main idea is based on the following observations: - The necessity of using only consistent global checkpoints for establishing recovery lines is to avoid processing a special kind of events called O-event (Output Event).
Therefore, we have Ci DR 2 DR 2 → Cj or Cj → Ci (lemma 1). DR 2 b) Á. Assume that Ci → Cj (i,j³[0,n]). There exists thus an in-transit message of (Ci, Cj) which is not logged (lemma 1). This means that G has an in-transit message, which is not logged. o Theorem 1 can be applied to find the nearest recovery line for a consistent global state with the following 3 steps approach: 1. The initial checkpoint set contains local checkpoints, where each checkpoint is the nearest checkpoint before the consistent global state on each process.
E. if the most recent checkpoint is Cp,k (k1), then the recovery line contains either Cp,k or Cp,k-1. For example, in Figure 7 the recovery line of (B0, B1, B2) are only established between (C0,0, C1,1, C2,1) and (C0,1, C1,2, C2,2). Such the way to establish a recovery line proves that the rollback distance is either less than or equal to two checkpoint intervals. In other words, the rollback distance in both ROS and MRT has an upper bound two checkpoint intervals. Furthermore, MRT ensures that the replay time is also limited in two checkpoint intervals .