Preemptive Online Scheduling with Reordering

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Preemptive Online Scheduling with Reordering

We consider online preemptive scheduling of jobs, arriving one by one, on m identical parallel machines. A buffer of a fixed size K > 0, which assists in partial reordering of the input, is available to be used for the storage of at most K unscheduled jobs. We study the effect of using a fixed sized buffer (of an arbitrary size) on the supremum competitive ratio over all numbers of machines (th...

متن کامل

Optimal Online Preemptive Scheduling

In this lecture we’ll study online preemptive scheduling on m machines of arbitrary speeds. We’ll first review the problem and it’s associated literature, then give an optimal deterministic algorithm known as ”RatioStretch”. RatioStretch uses the optimal competitive ratio R > 1 as an input, and achieves R whenever such an R is obtainable. The exact optimal R maybe computed via a linear program,...

متن کامل

Online Preemptive Scheduling on Parallel Machines

We consider an online version of the classical problem of preemptive scheduling on uniformly related machines. We are given m machines with speeds s 1 ≥ s 2 ≥. .. ≥ s m and a sequence of jobs, each described by its processing time (length). The actual time needed to process a job with length p on a machine with speed s is p/s. In the preemptive version, each job may be divided into several piec...

متن کامل

Approximation in Preemptive Stochastic Online Scheduling

We present a first constant performance guarantee for preemptive stochastic scheduling to minimize the sum of weighted completion times. For scheduling jobs with release dates on identical parallel machines we derive a policy with a guaranteed performance ratio of 2 which matches the currently best known result for the corresponding deterministic online problem. Our policy applies to the recent...

متن کامل

Approximation Results for Preemptive Stochastic Online Scheduling

We present first constant performance guarantees for preemptive stochastic scheduling to minimize the sum of weighted completion times. For scheduling jobs with release dates on identical parallel machines we derive policies with a guaranteed performance ratio of 2 which matches the currently best known result for the corresponding deterministic online problem. Our policies apply to the recentl...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: SIAM Journal on Discrete Mathematics

سال: 2011

ISSN: 0895-4801,1095-7146

DOI: 10.1137/090766139