کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6874181 | 1441027 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Vacationing server model for M/G/1 queues for rebuild processing in RAID5 and threshold scheduling for readers and writers
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نظریه محاسباتی و ریاضیات
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We present two methods to obtain the mean delay cycle for the M/G/1 queueing system with the Vacationing Server Model - VSM, which starts with an arrival during a vacation and ends when the queue is emptied and a vacation starts. In the case of VSM with multiple vacations the server returning from a vacation takes another vacation if the queue is empty, otherwise it starts serving requests. The M/G/1 queue has arrivals with rate λ, mean service time xâ¾, so that its utilization factor is Ï=λxâ¾, and its mean busy period is gâ¾=xâ¾/(1âÏ). The VSM delay cycle starts with a requested whose mean service time is augmented by the mean residual vacation time: yâ¾=xâ¾+vâ¾r, so that the mean delay cycle is dâ¾v=yâ¾/(1âÏ). This is the method used to determine rebuild time in RAID5 disk arrays. In a second study which deals with threshold scheduling of readers and writers dâ¾v is obtained as the product of the mean number of requests arriving during the residual vacation time plus one (the request starting the residual vacation time) times gâ¾, which yields dâ¾vâvâ¾r=(1+λvâ¾r)Ãgâ¾ as before. The analysis of VSM for rebuild processing in RAID5 and threshold scheduling of readers and writers is provided.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Information Processing Letters - Volume 135, July 2018, Pages 41-46
Journal: Information Processing Letters - Volume 135, July 2018, Pages 41-46
نویسندگان
Alexander Thomasian,