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A weighted checkpointing protocol for mobile distributed systems

机译:移动分布式系统的加权检查点协议

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Here, we propose a weighted checkpointing approach for Mobile Distributed Computing Systems (MDCSs) that significantly reduces checkpointing overheads on mobile nodes. Checkpointing protocols can be coordinated, log-based or quasi-synchronous. Coordinated checkpointing requires extra synchronisation messages and may block the underlying computation. In quasi-synchronous approach, processes have limited autonomy in checkpointing but all nodes need not checkpoint concurrently. Such protocols guarantee consistent global state but results in dynamic checkpointing overheads. To minimise these overheads, we propose a weighted checkpointing protocol that requires no synchronisation messages, reduces the checkpointing overheads at mobile nodes but requires logging for mobile nodes. Simulation results show that the new approach is better than quasi-synchronous approach.
机译:在这里,我们为移动分布式计算系统(MDCS)提出了一种加权检查点方法,该方法可以显着减少移动节点上检查点的开销。检查点协议可以是协调的,基于日志的或准同步的。协调检查点需要额外的同步消息,并且可能会阻塞基础计算。在准同步方法中,进程在检查点时具有有限的自治权,但是所有节点不必同时执行检查点。这样的协议保证一致的全局状态,但会导致动态检查点开销。为了最大程度地减少这些开销,我们提出了一种加权检查点协议,该协议不需要同步消息,可以减少移动节点的检查点开销,但是需要记录移动节点。仿真结果表明,该新方法优于准同步方法。

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