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Questions tagged [scheduling]

The tag has no usage guidance.

3
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1answer
47 views

Debugging and fine-tuning the linux process scheduler

When debugging sporadic web application slowdowns, I've found that all the processes have quite high maximum scheduling delay. # perf sched record -- sleep 10 && perf sched latency --sort max ...
-1
votes
0answers
23 views

How to configure the Linux Scheduler to do no Load Balancing between 2 Nodes on a NUMA System?

i am experiencing some strange memory bandwidth issues on a new system. Configuration: 2xXeon Silver 4114 2x6*16GB 2666MTS RDIMM (symmetric) CentOS7.0 minimal HT disabled I have already read into ...
0
votes
1answer
33 views

Can a linux process be configured to run ANY time it is ready?

I have a process that does a small amount of work, then goes to sleep for 1-5ms. When that sleep time is up, I want that process to get the CPU IMMEDIATELY! Whatever process is already on the CPU ...
0
votes
2answers
106 views

User's Free/Busy status not viewable in “Scheduling Assistant” in Outlook client only

This is a weird one, and I've been Googling for days without any luck. I have a client who runs Exchange/Outlook 2016. Jane Doe is in the Marketing department, and her AA (John Smith), and a few ...
1
vote
0answers
16 views

Gentoo running unknown scheduler

I inherited management of a Gentoo based server (Gentoo Base System release 2.3, 4.4.26-gentoo) that is invoking a number of php scripts each night but I can't figure out how. I don't see them ...
1
vote
1answer
299 views

Does ionice has any effect on NFS client?

I need to remove millions of directories recursively on a NFS share and to avoid any performance issues, I ran the command with: ionice -c 3 -t find /dir -type f -exec rm {}; which will delete all ...
0
votes
0answers
25 views

Allocating processes to VMs and scheduling

My host has 32 cores. To maximise hardware utilisation I've assigned 150% of it to 12 VMs (4 cores each). So far application owners do not complain though my question is not about the ratio. One of ...
0
votes
3answers
3k views

Schedule email forwarding in Office 365

Is it possible to schedule email forwarding start/stop in Office 365? I see a way to enable/disable in both the Office 365 and Exchange sides, but no way to schedule it. Exchange mail flow rules don't ...
0
votes
3answers
400 views

How to prevent a particular CPU core from being used?

Is it possible to prevent a CPU core from being used by the OS in Linux? The maxcpus=<n> boot parameter prevents specified number of cores from being seen in the OS. I want that all cores be ...
1
vote
1answer
15 views

Making Linux processes schedule based on other prcoesses

I am using CentOS release 6.7. I have 2 services, say A and B. Service B is dependent on service service A. For example, if service A stops, I want service B to stop automatically. Similarly, if ...
1
vote
1answer
180 views

tc filters not working with DRR

I am trying to control the outgoing traffic from two VMs with the DRR qdisc. This is the hierarchy I want to have: root | qdisc drr ...
1
vote
2answers
1k views

What are front merges in I/O scheduling and how can I tune this parameter?

My Linux uses the Deadline algorithm for I/O scheduling. One of the parameters is the front_merges parameter under /sys/block/sda/queue/iosched/front_merges. By default it is set to 1, which means ...
0
votes
0answers
3k views

Why my task has 0x5 Access denied exit code with Task Scheduler if script was finished?

I have following batch script: copy \\remotehost.ip\c$\dumps\TEST_%date%.dmp C:\dumps\TEST_%date%.dmp sqlplus sys/password as SYSDBA @C:\dumps\recreate_test.sql > C:\dumps\recreate_test.log ...
0
votes
1answer
562 views

Bacula alternative weekly schedule?

How to schedule Job1-Job5 to be run as shown below? Sun Mon Tue Wed Thu --------------------------- Job1 Job2 Sun Mon Tue Wed Thu --------------------------- Job3 Job4 ...
11
votes
1answer
7k views

Count number of allowed CPUs in a Docker container

My specific scenario is the following. I launch a docker container with a specific cpuset: docker run --cpuset-cpus="0-2" # ... inside that container I run a shell script as the entry point and that ...
2
votes
0answers
798 views

cron.weekly runs on wrong day of week on Ubuntu

I have this line in my /etc/crontab: 47 6 * * Sat root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly ) So the cron.weekly should be started every Saturday ...
2
votes
2answers
67 views

Delayed software release using pre-fetched update data?

I am currently specing out the software requirements for a new project which will be in locations with intermittent network connections. Since some of our locations will have intermittent network ...
0
votes
1answer
207 views

How can I run a few tasks consecutively that I usually execute manually

Ok, first of all let me describe my working situation so that is is clear why this is a question pertaining to system administration. I work at a larger IT solution company that is running operations ...
0
votes
0answers
89 views

need at jobs identified by name (advanced atd daemon)

Sometimes I'd like to delete or overwrite (or simply cat) an at job. Unfortunately, the at jobs are identified by a sequential number (file in /var/spool/cron/atjobs), which makes those operations ...
1
vote
3answers
110 views

Crontab schedule monthly

I would like to schedule my tasks every x months on day 1 starting for example, March. I am unsure if this is the syntax I'm looking for (for repeating the job every 4 months): 0 0 1 3/4 * /path/to/...
0
votes
3answers
132 views

crons are not working, but scripts are… any idea what is it?

I checked on internet , this might be a common problem, but I dont know how to solve it, all things that they said are not my case... The cron is running, I checked, still, I have no log files (at ...
0
votes
1answer
781 views

I/O limits in FreeBSD

I am searching for a method to implement per Jail I/O limits in FreeBSD, as linux have from a long time now. During my research I stumbled upon: http://info.iet.unipi.it/~luigi/geom_sched/ My ...
1
vote
2answers
3k views

Can KVM CPU assignment count differ from physical hosts CPU count?

I have read this question. I knew already that I could for example, have a quad core machine with four guests each having two vCPUs. As they don't all be require 100% CPU usage all the time, the ...
1
vote
1answer
771 views

open source job/process management/monitoring/control system [closed]

I'm looking for an open source solution for the following: I have jobs that need to run continuously. The jobs are applications or scripts. If they fail, they need to be restarted. If they fail, ...
7
votes
5answers
25k views

Why is Windows Task Scheduler trying to launch multiple instances?

We have a number of Windows Scheduled tasks that run on one Server 2008 Webserver (not R2) which is in a cluster. We recently moved from an original webserver Cluster to a new webserver Cluser (...
0
votes
1answer
327 views

Lightweight distributed job queuing system for independent realtime jobs

We are a small team in a Microsoft-only corporate environment. Our core task involves running a sets of about 100 independent runs of an in-house tool. Each run has one input file and multiple output ...
0
votes
2answers
234 views

cron time is not correct or cron is running with delay

my cron jobs are executed half an hour later than when they are supposed to. Does cron refer to the system time when it executes its jobs or refers to its own time(if it has one)?
1
vote
1answer
179 views

Guideline for `nice` priority number?

I'd like a more systematic way for prioritizing my tasks with nice(1). Obviously 0 is "normal", 19 is "lowest priority" and -19 is "highest priority", but what about all the other numbers? If I have ...
-1
votes
1answer
74 views

how to start scheduling tasks

"How to start a different task when other task stops" in windows xp.By using task scheduler it has to happen. either programmetically or through command line.
2
votes
1answer
324 views

Intelligent Task Scheduler

Is anyone aware of a tool for creating optimal schedules for tasks? I have numerous servers, running multiple databases, with various scripts that import and transform data to and from each database. ...
4
votes
2answers
583 views

Program to manage process workflow across machines?

I have an in-house Perl script that is in great need of refactoring. In the interest of not reinventing the wheel, I'm looking to see if an open-source equivalent to it exists, and I'm having trouble ...
5
votes
1answer
130 views

AD: Roll out an MSI application at midnight

Using Windows Server's Active Directory and Group Policy, is there a way to roll out an MSI file at a scheduled time, like midnight?
2
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0answers
736 views

Exchange 2003 to 2010 migration: Can I remove free/busy public folder once all users are moved?

Now that all my mailboxes are on the 2010 server, can I remove the schedule+free/busy public folder? I am having scheduling synchronization issues, and I believe it may be at fault. All clients are ...
1
vote
1answer
610 views

What is a “virtual context switch”

IBM's AIX has a "virtual context switch" column in lparstat but neither IBM's redbooks nor google searches will tell me what exactly a virtual context switch is and how its different from a regular ...
3
votes
2answers
61k views

Outlook 2010 Calendar - Unable to See Free/Busy Scheduling

I am having an issue where random user cannot see others Free/Busy Scheduling in Outlook Calendar 2010. The set up is pretty simple with one domain. I have been Googling all morning, I am unable to ...
2
votes
1answer
433 views

Three server processes consume no more than 50% of Dual Core CPU

I have three processes running on Intel Core 2 Duo CPU. From watching output of 'top' and graphs of CPU load (drawn by MRTG, data collection via SNMP) I can see that CPU load is never more than 50%, ...
2
votes
2answers
3k views

nice renice and ionice

I've read about nice renice and ionice to control the scheduling priority of running processes. However, I still don't understand when and how are they useful for. For instance doing something like: ...
1
vote
4answers
9k views

MYSQL Scheduled backups?

I have mysql installed on my web server, which I am accessing using PHPMyAdmin. My client asked me following: Install PhpBB Setup MYSQL Scheduled backup I have installed PhpBB successfully but hwo ...
2
votes
2answers
5k views

What is the difference between renice and chrt commands in Linux?

What is the difference between renice and chrt commands in Linux?
0
votes
1answer
81 views

How does WIndows Scheduled Task detect that the scheduled application has not started?

in windows server 2003. Does it assume that if it hasn't returned an error code, it must be running? or is there some kind of start code? Thanks, P
1
vote
1answer
266 views

Howto check on arcgisserver if service (published map) is started?

I have an ArcGIS Server from Esri running and I need to check every hour if some published services (maps) are running. WMS and WFS.
0
votes
1answer
118 views

Hardware Status update

I am running vcentre 4.0.0 and the Hardware Status page is showing good information about my hosts but it doesn't appear to automatically update. If I hit the update link it does so but is there a way ...
1
vote
1answer
3k views

Give pthread_setschedparam() permissions to non-root user (linux)

How can I give a non-root user permission to execute pthread_setschedparam() to set thread priorities? Thank you
3
votes
3answers
245 views

SQL Server Job system silently fails

We run numerous scheduled jobs using MS SQL 2005 job scheduler. Over the past few weeks, we've been witnessing that a running job will simply STOP and will not record any history in the Log File ...
84
votes
9answers
48k views

Prevent duplicate cron jobs running

I have scheduled a cron job to run every minute but sometimes the script takes more than a minute to finish and I don't want the jobs to start "stacking up" over each other. I guess this is a ...
5
votes
1answer
748 views

ionice vs. Software-RAID

Does ionice work in Software-RAID environments? I cannot set the CFQ scheduler for the md devices, because there is no file /sys/block/md0/queue/scheduler . It seems that the scheduler settings for ...
-1
votes
2answers
594 views

Exchange Resource Scheduling Display Screen

One of my clients is requesting an LCD screen outside of their conference room displaying the availability of that Exchange Room Resource. Does anybody know of an easy way to do this? I've found a ...
9
votes
4answers
31k views

How can I prevent a scheduled task from running if the same task is already running?

I have written a php script to check if there are any new files in a folder and, if any new files exist, upload them to a server. These files can be quite large. I want to run this script frequently-...
4
votes
3answers
15k views

Preventing double booked appointments in Outlook

At our organization we use a series of shared Outlook calendars to schedule out our conference rooms. All domain users are setup as authors of these calenders. We are now running into a problem ...
0
votes
2answers
499 views

How can I schedule background tasks for delayed execution in IBM 4690 OS?

Background applications can be configured to start automatically when a controller is powered on, or when the controller assumes the role of master/file server. Is it possible to schedule activation ...