Grid Job Routing Algorithms - Phosphorus

Grid Job Routing Algorithmssynchronize computation data. Therefore, p2p service may be insufficient for some final user groups, whichmust be adjustable to the needs of demanding Grid users.Three types of connections with more than two end points are identified:• Point-to-multipointP2MP is the connection type where a single source of information is sending data to multiple destination points.A special case of this scenario is found in VLBI projects, where data is sent in the reverse direction frommultiple sources to a single destination point. The point-to-multipoint connection can easily be represented as anetwork star topology model.Figure 3.4: Point-to-multipoint connection.• MulticastingMulticasting is the connection type where a single source of information distributes the same data to multipledestination point simultaneously, optimizing link usage. Optimization in this case means that data is transferredover each link only once and is copied only where links split to deliver content to single receivers. The mainidea of multicasting is to deliver the same content, at the same time to multiple users with minimum linkutilization. Therefore multicasts transmission is often used for multimedia data streaming but also forcomputation data distribution (ftp) to multiple cluster infrastructures.Project:PHOSPHORUSDeliverable Number: D.5.3Date of Issue: 31/06/07EC Contract No.: 034115Document Code: Phosphorus-WP5-D5.323