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Questions tagged [scheduling]

59 questions
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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 the files and the leftover empty directories, I can…
GP92
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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 front merges are likely to occur. One can set it to…
Ely
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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 at 6:47 AM right? But it starts each Wednesday instead. I…
valk
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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 connections. We will have (almost?) all software…
scragar
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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 scheduler would handle this for me. My question is…
jwbensley
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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. I'm currently scheduling the various cronjobs by…
Cerin
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Can you recommend an operational scheduling/workflow management tool?

We have a lot of scheduled jobs that do a variety of things-- moving logs around, ingesting and cooking them, fetching data from external sources, building reports, etc. Some of it happens hourly, some of it daily, and there are lots of…
Patti
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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 using Outlook 2010 or 2007. Can I just get rid of…
Nick
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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%, and, most of the day, when those processes are…
thor
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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 Kubernetes' control plane that I've seen mention…
Jakob Odersky
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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 service A starts, I want service B to also start…
kosta
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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 1: / | \ / |…
Backswitch
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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/file The man page for crontab does not explain in…
Octav O
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open source job/process management/monitoring/control system

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, say 10 times consecutively or within a certain time…
Aaron Frantisak
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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 a job that is non-interactive (I'll go get coffee…
bukzor
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