PPT-The M/G/1 Queue and others

Telephone Line Problem Callers queue for outgoing lines This system will allow only eight outgoing connections Telephone Line Problem The outgoing telephone lines could be physical as in the original version or virtual as in ATM and the decision of the CAC function would decide the number of connections available. Waiting. 1. Reminder!. Concurrency problem: . asynchronous . modifications . to object states . lead . to . failure . of . thread . computation . (pre-condition . is not . met) . 2. Overview. Techniques to deal with potential failures . Badi’ Abdul-Wahid. Department of Computer Science. University of Notre Dame. CCL Workshop 2012. Overview. Background. Challenges and approaches. Our Work Queue software. Folding@Work (F@W). Accelerated Weighted Ensemble (AWE). Internet congestion control. Damon . Wischik. , UCL. Mark Handley, UCL. Gaurav. . Raina. , Cambridge / IIT Madras. A little bit about me. I did a PhD in mathematics at Cambridge and I continued there afterwards as a research fellow. Cousin of the Stack. Examples of Queues. Queue. An abstract data type (container class) in which items are entered at one end and removed from the other end. First In First Out (FIFO). No standard queue terminology. Most of the ride is obscured from the path – leaving only the beginning and end of the ride visible.. Around the ride there are objects that appear creepy and start to give unease. Branches have grown over an old abandoned car, there are statues of the wraiths broken around the queue path, left over scaffolding and building equipment are dotted around – like someone has just got up and left. The building itself is dilapidated with walls falling away and stone work showing through cracked plaster. There are the same branches growing over the building as the car earlier.. What is a queue?. It is an . ordered. group of homogeneous . items, . examples: . The . cars at a stop light, . The . check-out line at a grocery store. Queues have two ends: . Items are added at one end. . Directions. Get into TWO TEAMS. Sit in a semi circle. Buzzer Rules. There is a buzzer on the . iPad. in front of you—BE GENTLE. (Don’t break our . iPads. —we have to turn them back in!. ). If you know the answer, hit the buzzer. . Reference. : Chapter . 2, Algorithms,4rd . Edition, Robert . Sedgewick. , . Kevin Wayne . . Outline. Priority Queue. Binary Heaps. Implementation and demo. HeapSort. 7/11/17. Prioriry Queue. 2. Example 1: Scheduling. CS232 – Lecture 9. Chapter 9: Priority Queues, Heaps, and Graphs. 9.1 – Priority Queues. 9.2 – Heaps. 9.3 – Introduction to Graphs. 9.4 – Formal Specification of a Graph ADT. 9.5 – Graph Applications. Proof by Induction. Ezgi . Shenqi. Bran. 4/4/2016. 1. CSE 373 Spring 2016. ADTs so far . List. Stack. Queue. Adding Elements. insert. (at . any. . location. ). push. (only to. the last location,. top of the stack). 5. . SEPTEMBER 2017. TABLE OF CONTENTS. Background and RELIEF sought. PRELIMINARY ISSUES. 3. . Reasons for the dissolution of the board of PAN SOUTH AFRICAN LANGUAGE BOARD (PanSALB). 4. . ORDER MADE BY THE COURT. Haibo. , Li. lihaibo@ihep.ac.cn. Computing Center, the Institute of High Energy Physics, CAS, China. 2012/10/15. Agenda. OpenStack. Overview. Why choose . OpentStack. ?. What to do with . OpenStack. Creates a permanent channel for communication. Process A. Process B. Create a message queue instance. int. . msgget. (. key_t. key, . int. . msgflg. ). Message queue identifies. Name of the message queue. Background:. SCC utilizes AIX printing subsystem to handle majority of the application printing needs. Exceptions are: . . Pathology printing through Pathology Print servers; . . PathDX. and Genetic module label printing are through RDS formatters; .