Questions tagged [scheduling]
The scheduling tag has no usage guidance.
59
questions
2
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2
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374
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Why is the Kubernetes scheduler a separate process from the controller manager?
This is a question about the design of Kubernetes, I don't have a specific technical problem to solve, but I'm trying to understand the thoughts behind some of its architecture.
All explanations about ...
- 121
0
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1
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113
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How to ping backup interface?
this is my network configuration:
bond interface 192.168.101.50/24 has two salaves: eth1 (192.168.101.1) that is connected to 192.168.101.2 and eth2 (192.168.101.10) that is connected to 192.168.101....
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0
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66
views
How to see contents of output queue of NIC in Linux and introspect frame delay
I am experimenting with tc tool to implement prioritization of specific data coming from my computer and would like to see exatly how the frames are scheduled and how much time they spend in the qdisc ...
- 13
0
votes
1
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397
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No Pods reachable or schedulable on kubernetes cluster
I have 2 kubernetes clusters in the IBM cloud, one has 2 Nodes, the other one 4.
The one that has 4 Nodes is working properly but at the other one I had to temporarily remove the worker nodes due to ...
- 131
0
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1
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66
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Can kubernetes move pods that begin to have interfering workloads?
Consider that I have two pods: one is serving webpages and another is performing consistent computation, like a Flask server on one pod and a Spark Executor as the other.
Suddenly a new feature ...
- 3
0
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1
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914
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WSUS GPO - Specific week specified, but ignored
I have configured a GPO to force updates via GPO in a scheduled maintenance window since these boxes were previously getting updates and just rebooting outside of active hours. I would prefer that ...
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-1
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1
answer
241
views
How to schedule VMs in few specific host?
I have 4 nodes, 1 controller nodes and 3 compute node.
I divined into 2 AZ, AZ1 (compute1) and AZ2(compute2, compute3)
I can use create instance w/ --avaibilty-zone AZ1 (AZ2) to make the instance ...
- 301
1
vote
1
answer
543
views
Finding wasteful or over-provisioned pods on a "full" but underutilized Kubernetes cluster
I work on a Kubernetes cluster where, right now, about 95% of the CPUs and 90% of the memory have been allocated to pods. However, according to the Kubernetes Dashboard, the overall instantaneous CPU ...
- 313
1
vote
3
answers
4k
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Prevent multiple cron jobs from running concurrently [duplicate]
My server runs a number of cron jobs at midnight. Each job creates a backup of something, by creating a tarball and compressing it with xz.
Since xz is a CPU and memory pig, I added a random delay to ...
- 898
3
votes
1
answer
1k
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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
...
- 338
0
votes
1
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70
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 ...
- 312
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votes
2
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13k
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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
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0
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34
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 ...
2
votes
1
answer
2k
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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 ...
- 681
0
votes
3
answers
12k
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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 ...
- 182
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3
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2k
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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 ...
- 174
1
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1
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18
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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 ...
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1
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1
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335
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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
...
- 11
2
votes
2
answers
3k
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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 ...
- 150
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0
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8k
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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
...
- 125
0
votes
1
answer
954
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 ...
- 103
15
votes
1
answer
17k
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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 ...
- 425
2
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0
answers
1k
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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 ...
- 497
2
votes
2
answers
71
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 ...
- 106
0
votes
1
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220
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 ...
- 217
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0
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103
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 ...
- 81
1
vote
3
answers
230
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/...
- 113
0
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3
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140
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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 ...
- 99
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1
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941
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 ...
- 872
2
votes
2
answers
5k
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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 ...
- 4,212
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969
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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, ...
- 111
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6
answers
47k
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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 (...
- 277
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1
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402
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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 ...
- 261
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2
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599
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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
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1
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403
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 ...
- 263
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1
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78
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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.
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1
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346
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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.
...
- 3,590
5
votes
2
answers
638
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 ...
- 718
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votes
1
answer
149
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?
- 153
2
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0
answers
846
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 ...
- 21
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vote
1
answer
716
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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 ...
- 412
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2
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62k
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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 ...
- 173
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1
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458
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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%, ...
- 658
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votes
3
answers
5k
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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:
...
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6
answers
12k
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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 ...
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3
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10k
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What is the difference between renice and chrt commands in Linux?
What is the difference between renice and chrt commands in Linux?
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88
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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
Peter Goras
1
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1
answer
267
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.
- 333
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1
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121
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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 ...
- 352
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1
answer
7k
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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
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