Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [scheduler]

63 questions
3
votes
1 answer

Setting I/O scheduler for SSD based RAID array on EC2 instances

I created a RAID array using the 2 local SSD drives on a EC2 c3.4xlarge instance. # mdadm --create /dev/md127 --level=0 --raid-devices=2 /dev/xvdf /dev/xvdg # mkfs.ext4 /dev/md127 # mkdir /data # echo 'DEVICE /dev/xvdf /dev/xvdg' > /etc/mdadm.conf #…
BraveHeart
  • 31
  • 3
3
votes
1 answer

What's the proper way to change a process' scheduling policy to IDLE?

I have a long running process on a server running Ubuntu Server 9.10. I would like to make it run under the SCHED_IDLE policy using the chrt command. However, after reading the man page, I can't manage to understand the proper way to issue the…
ΤΖΩΤΖΙΟΥ
  • 1,048
  • 1
  • 10
  • 19
2
votes
1 answer

In CentOS 7, is there a way to specify which block devices should be tuned with the scheduler (or ELEVATOR)?

In CentOS 6, there was /etc/tune-profiles/my-server/ktune.sysconfig with this text(I'm referring to the comments that explain what the code is doing): # This is the I/O scheduler ktune will use. This will *not* override anything # explicitly set on…
Levi Uzodike
  • 125
  • 6
2
votes
1 answer

rcu_sched self-detected stall on CPU + watchdog: BUG: soft lockup - CPU#3 stuck for 22s

Being unable to ssh into a machine I connected it to a monitor and found the following: The machine is running Ubuntu Server 18.04 LTS and is a first generation 8 core Ryzen 1700. I've restarted the machine since and it works fine but am not sure…
Greg
  • 1,657
  • 5
  • 27
  • 38
2
votes
0 answers

Is it possible to set an IO scheduler in KVM Guest with VirtIO?

Is it possible to set an IO scheduler in a KVM Guest with VirtIO? With the following command i don't get any options to choose cat /sys/block/vda/queue/schedule none Kerneloption are set: root@jessie:~# egrep 'CONFIG_IOSCHED_.*=y'…
demonking
  • 131
  • 3
2
votes
0 answers

How to change I/O scheduler for a disk in ubuntu 16.04?

I am trying to set noop I/O scheduler for my disk. However, I am getting this error, -bash: echo: write error: Invalid argument I checked and found that there is no I/O scheduler option in my disk. cat /sys/block/sda/queue/scheduler [none] Is…
Vikas Saini
  • 163
  • 3
2
votes
1 answer

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
  • 681
  • 2
  • 9
  • 27
2
votes
0 answers

Sun Grid Engine (SGE) / limiting simultaneous array job sub-tasks

I am installing a Sun Grid Engine environment and I have a scheduler limit that I can't quite figure out how to implement. My users will create array jobs that have hundreds of sub-tasks. I would like to be able to limit those jobs to only running…
wfaulk
  • 6,878
  • 7
  • 46
  • 75
2
votes
1 answer

Powershell: PSScheduledJob for non-admin

Is there a way for non-admins to use the PSScheduledJob module? For example, I tried Register-ScheduledJob without admin privilege, but it returns "Access is Denied" error. We know that we can allow non-admin to use PSRemoting (such as…
Jeff
  • 61
  • 1
  • 4
2
votes
2 answers

How to schedule a job to run every 10 minutes in TWS

TWS is Tivoli Workload Scheduler. I have scheduled a job, and made it repeatable every 10 minutes. I put it in a job stream with a run cycle of daily. Now, the job runs once every ten minutes on the first day, twice on the second day and so on. What…
Bezz
  • 31
  • 1
  • 1
  • 4
2
votes
2 answers

How to configure Linux for using only one CPU/core of a NUMA system

I'm currently working with an AMD Opteron-based NUMA system. For the needs of my current project, I'd like to make Linux and all of the system processes to utilize only the CPU0 (and preferably, only one of its cores), leaving all other cores for my…
Roman Dmitrienko
  • 155
  • 1
  • 5
2
votes
2 answers

can server 2008's task scheduler run a php file?

I have a server 2008 64 bit machine with php5 via fastcgi installed. I want to run a .php script every day at 3 AM. I set up a task and "Last Run Result" says "%1 is not a valid Win32 application" The event properties describe more failure: "Task…
rg89
2
votes
1 answer

Where can I find a complete list of Windows Scheduler Status Codes?

I am having troubles with a task I added to the Windows Scheduler and now I am trying to debug it. It is returning status code 267011 (in Hex: 41303). Where can I find a complete reference describing the Status Codes of the Windows Scheduler? Only…
Bertolt
  • 297
  • 3
  • 10
1
vote
0 answers

Child application doesn't start when run from windows scheduled task

I'm trying to schedule an automation script. The 1. .bat file starts monitor script (python) 2. monitor script (python) does network request for jobs from other system 3. if job, monitor script (python) starts UI automation script (python) 4. UI…
monkut
  • 255
  • 3
  • 13
1
vote
2 answers

Linux: scheduling processes and threads

When there are multiple single-threaded processes and some multi-threaded processes, all CPU-intensive, how time is divided between them (assuming that all have the same priority)? For example, on 48-core machine, I have 48 single-threaded processes…
Mikhail Kovtun
  • 11
  • 1
1
2
3 4 5