scheduling

问题 I want to use a timer in my simple .NET application written in C#. The only one I can find is the Windows.Forms.Timer class. I don't want to reference this namespace just for my console application. Is there a C# timer (or timer like) class for use in console applications? 回答1: System.Timers.Timer And as MagicKat says: System.Threading.Timer You can see the differences here: http://intellitect.com/system-windows-forms-timer-vs-system-threading-timer-vs-system-timers-timer/ And you can see

问题 I plan to use the Quartz scheduler as I read many good opinions about it. My problem is as follows: I will have thousands of triggers living in the system at any given time. Most of the triggers will fire just one event and die. In addition, it is very likely I will have to cancel many jobs after their allocation (based on new input). Can Quartz scale to this? Which JobStore is recommended? I planned to use the JDBC one over mysql. Added Information : My jobs will either send an e-mail or

问题 if we create pthreads (pthread_create) or processes (fork) with default scheduling policies on linux, will the scheduler treats the processes and threads with same priority while scheduling them? let us say there is process P1 with one thread and process P2 with 2 threads T1 T2 lets say there is only one core..will the scheduling be P1 T1 P1 T2 P1 T1 P1 T2 or P1 T1 T2 P1 T1 T2 回答1: Linux no longer schedules processes at all. Within the kernel, threads are scheduled. The concept of a process

问题 I have recently started my OS course. As far as i know the work of dispatcher is to save the context of current process and load context of process to be run next. But how does it do that? When a process is preempted then as soon as dispatcher will be loaded and executed ( as it is also a program ) the context of previous process in registers, PSW etc will be lost. How is it going to save the context before loading itself ? 回答1: The simple answer is that modern processors offer architectural

问题 I want to create some function to schedule php scripts,for example if i want tu run page.php at 12/12/2012 12:12 i can call schedule_script('12/12/2012 12:12','page.php');//or by passing a time/datetime object or for example call one script every minute schedule_interval(60,'page.php');//every 60s=1minute i'll may add some other function to see what script are scheduled or delete one of them. i want this functions to work on both UNIX and WINDOWS platforms,i DO NOT want ugly solutions like

问题 I am running phpmyadmin and installed apache server on my personal computer. My problem is that I am trying to set MySQL event_scheduler to always be enabled even when the server restarts. I was reading that by setting the following command line in the server configuration file ( my.cnf or my.ini ) it should work: event_scheduler=DISABLED . However, where do I locate this my.cnf or my.ini file, and also should the command line be event_scheduler=DISABLED or event_scheduler=ENABLED seeing that

问题 I am running phpmyadmin and installed apache server on my personal computer. My problem is that I am trying to set MySQL event_scheduler to always be enabled even when the server restarts. I was reading that by setting the following command line in the server configuration file ( my.cnf or my.ini ) it should work: event_scheduler=DISABLED . However, where do I locate this my.cnf or my.ini file, and also should the command line be event_scheduler=DISABLED or event_scheduler=ENABLED seeing that

问题 I've written a script that uses two thread pools of ten threads each to pull in data from an API. The thread pool implements this code on ActiveState. Each thread pool is monitoring a Redis database via PubSub for new entries. When a new entry is published, python passes the data to a function that uses python's Subprocess.POpen to execute a PHP shell to do the actual work of calling the API. This system of launching PHP shells is necessary for functionality with my PHP web app, so launching

问题 I'm currently working on a website that will allow students from my university to automatically generate valid schedules based on the courses they'd like to take. Before working on the site itself, I decided to tackle the issue of how to schedule the courses efficiently. A few clarifications: Each course at our university (and I assume at every other university) comprises of one or more sections. So, for instance, Calculus I currently has 4 sections available. This means that, depending on

问题 Can someone explain the differences between SCHED_OTHER, SCHED_FIFO and SCHED_RR? Thanks 回答1: SCHED_FIFO and SCHED_RR are so called "real-time" policies. They implement the fixed-priority real-time scheduling specified by the POSIX standard. Tasks with these policies preempt every other task, which can thus easily go into starvation (if they don't release the CPU). The difference between SCHED_FIFO and SCHED_RR is that among tasks with the same priority, SCHED_RR performs a round-robin with a