{"id":148392,"date":"2008-08-01T00:00:00","date_gmt":"2008-08-01T00:00:00","guid":{"rendered":"https:\/\/cm-edgetun.pages.dev\/en-us\/research\/msr-research-item\/exo-leasing-escrow-synchronization-for-mobile-clients-of-commodity-storage-servers\/"},"modified":"2018-10-16T21:17:23","modified_gmt":"2018-10-17T04:17:23","slug":"exo-leasing-escrow-synchronization-for-mobile-clients-of-commodity-storage-servers","status":"publish","type":"msr-research-item","link":"https:\/\/cm-edgetun.pages.dev\/en-us\/research\/publication\/exo-leasing-escrow-synchronization-for-mobile-clients-of-commodity-storage-servers\/","title":{"rendered":"Exo-leasing: Escrow Synchronization for Mobile Clients of Commodity Storage Servers"},"content":{"rendered":"<div class=\"asset-content\">\n<p>Exo-leasing provides a new way to implement escrow synchronization for disconnected applications. A key problem facing disconnected applications is the need to coordinate concurrent operations on shared data objects to avoid conflicts. Escrow synchronization is a well-known technique, useful for inventory control, that avoids conflicts by taking into account the semantics of fragmentable object types. Unfortunately, current techniques cannot be used on generic &#8220;commodity&#8221; servers because they require the servers to run the type-specific escrow synchronization code. This is a severe limitation for systems that require application-specific synchronization but rely on generic components to exploit economies of scale. Our exo-leasing method provides escrow synchronization without running any type-specific code in the servers. Instead, escrow synchronization code runs in the client, resulting in a modular system with the ability to use generic commodity servers. Running synchronization code in the client provides an additional benefit. Unlike any other system, our system allows a disconnected client to avoid conflicts by coordinating with another disconected client, reducing the need to coordinate with the servers. Measurements of a prototype system indicate that our approach achieves escrow-based conflict avoidance at moderate performance overhead on common expected workloads.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Exo-leasing provides a new way to implement escrow synchronization for disconnected applications. A key problem facing disconnected applications is the need to coordinate concurrent operations on shared data objects to avoid conflicts. Escrow synchronization is a well-known technique, useful for inventory control, that avoids conflicts by taking into account the semantics of fragmentable object types. 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