Shock Resistant Time Warp

13 years 8 months ago

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In an attempt to cope with time-varying workload, traditional adaptive Time Warp protocols are designed to react in response to performance changes by altering control parameter conﬁgurations, like the amount of available memory, the size of the checkpointing interval, the frequency of GVT computation, fossil collection invocations, etc. We call those schemes “reactive” because all control decisions are undertaken based on historical performance information collected at runtime, and come into effect in future system states. What must be considered a drawback of this class of approaches is that Time Warp logical processes (LPs) have most likely reached a state different from the one for which the control action was established - thus inducing performance control activities which are always outdated. This paper develops environment aware, self adaptive Time Warp LPs implementing a pro-active performance control scheme, addressing the timeliness of control decisions. Opposed to rea...

Alois Ferscha, James Johnson

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