scheduler

What is the relation between `task_struct` and `pid_namespace`?

谁说我不能喝 提交于 2019-12-06 02:10:29
问题 I'm studying some kernel code and trying to understand how the data structures are linked together. I know the basic idea of how a scheduler works, and what a PID is. Yet I have no idea what a namespace is in this context, and can't figure out how all of those work together. I have read some explanations (including parts of O'Reilly "Understanding the Linux Kernel") and understand that it could be that the same PID got to two processes because one has terminated and the ID got reallocated.

How to run airflow scheduler as a daemon process?

我的梦境 提交于 2019-12-06 02:08:12
问题 I am new to Airflow. I am trying to run airflow scheduler as a daemon process, but the process does not live for long. I have configured "LocalExecutor" in airflow.cfg file and ran the following command to start the scheduler.(I am using Google compute engine and accessing server via PuTTY) airflow scheduler --daemon --num_runs=5 --log-file=/root/airflow/logs/scheduler.log When I run this command, the airflow scheduler starts and I can see the airflow-scheduler.pid file in my airflow home

How to set “run only if logged in” and “run as” with TaskScheduler in C#?

北慕城南 提交于 2019-12-05 13:17:31
I've got code that uses the C# TaskManager object to create a task. On Windows 7 it works fine but on Windows XP (and presumably other Windows) it doesn't work at all because the default user for the task is system and thus there's no session for the GUI to be displayed. If I modify the created task manually in the control panel widget to set the job to run only when user is logged in and only for the particular user, then everything works perfectly. But despite hours of searching I see no options for setting these options in the C# objects. Anyone know a solution with the existing objects? I

How Laravel knows when the scheduler has been updated?

半腔热情 提交于 2019-12-05 09:56:55
My question is more of a general wondering. I have two commands created using Laravel, let's call them A and B. Each one of these commands are scheduled with the ->dailyAt($par) method. But the $par parameter comes from a query. I mean something like this: protected function schedule(Schedule $schedule) { $schedulerTime_commandA = App\Model\CommandsTime::where('id', 1)->first()->time; $schedulerTime_commandB = App\Model\CommandsTime::where('id', 2)->first()->time; $schedule->command('A') ->dailyAt($schedulerTime_commandA); $schedule->command('B') ->dailyAt($schedulerTime_commandB); } This is

Workload Scheduler for Node.js script - is it equivalent to cron jobs in Bluemix?

馋奶兔 提交于 2019-12-05 07:47:01
I'm trying to call node file.js with Bluemix Workload Scheduler every morning; file.js is in the root of my node.js project; file.js is not my server file. I used to use cron but it seems like "BlueMix doesn't have a concept of cron jobs." As result for the (only) step of my process, I got "node : command not found" I think I missed something. Is it even possible to do this with Workload Scheduler or should I find alternative options? MORE INFORMATION I'm trying to do : var wls = new WorkloadService(credentials); var wp = new WAProcess("MyProcessName", "DescriptionProcess"); wp.addStep(new

Execute repository functions in scheduler task

让人想犯罪 __ 提交于 2019-12-05 07:19:38
Currently I have an scheduler task, but I want to use function from my extbase repository (in the same extension). I keep getting "PHP Fatal error: Call to a member function add() on a non-object", no matter how I try to include my repo or controller from extbase. My SampleTask.php: namespace TYPO3\ExtName\Task; class SampleTask extends \TYPO3\CMS\Scheduler\Task\AbstractTask { public function execute() { $controller = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('\TYPO3\ExtName\Controller\SampleController'); $new = new \TYPO3\ExtName\Domain\Model\Sample; $new->setName('test');

Open Source Job Scheduler with REST API

折月煮酒 提交于 2019-12-05 04:42:39
Are there any open source Job Scheduler with REST API for commercial use which will support features like: Tree like Job dependency Hold & Release Rerun failed steps Parallelism Help would be appreciated :) NOTE: we are looking for open source alternative for TWS , Control-M , AutoSys . JobScheduler would seem to meet your requirements: Open Source see: Open Source and Commercial Licenses Rest API see: Web Service Integration Parallelism see: Organisation of Jobs and Job Chains I think that these areas are also covered (I downloaded and trialled the application): See here Tree like Job

Quartz.NET setting MisfireInstruction

假如想象 提交于 2019-12-05 02:21:28
I'm working in C# using Quartz.NET and am having problems setting the misfire instruction on a CronTrigger. I'm running an SQL backend with the Quartz DB installed. I have the following code which works fine for creating a job and running a scheduler. IScheduler _scheduler; IJobDetail job; ISchedulerFactory sFactory; ICronTrigger trig; sFactory = new StdSchedulerFactory(); _scheduler = sFactory.GetScheduler(); _scheduler.Start(); job = JobBuilder.Create<Test>().WithIdentity("testJob", "testGroup").Build(); trig = (ICronTrigger) TriggerBuilder.Create().WithIdentity("testTrigger", "testGroup")

Linux, need accurate program timing. Scheduler wake up program

最后都变了- 提交于 2019-12-05 00:55:13
I have a thread running on a Linux system which i need to execute in as accurate intervals as possbile. E.g. execute once every ms. Currently this is done by creating a timer with timerfd_create(CLOCK_MONOTONIC, 0) , and then passing the desired sleep time in a struct with timerfd_settime (fd, 0, &itval, NULL); A blocking read call is performed on this timer which halts thread execution and reports lost wakeup calls. The problem is that at higher frequencies, the system starts loosing deadlines, even though CPU usage is below 10%. I think this is due to the scheduler not waking the thread

Understading the Linux Kernel Scheduler

北城以北 提交于 2019-12-05 00:50:26
问题 I'm studying the Linux Kernel and am trying to figure out how the Round Robin scheduling algorithm works. In the kernel\sched_rt.c file, there's a method called task_tick_rt defined like this: static void task_tick_rt(struct rq *rq, struct task_struct *p, int queued) { update_curr_rt(rq); watchdog(rq, p); /* * RR tasks need a special form of timeslice management. * FIFO tasks have no timeslices. */ if (p->policy != SCHED_RR) return; if (--p->rt.time_slice) return; p->rt.time_slice = DEF