Ubuntu :: Where To Put IO Scheduler Settings
Apr 24, 2011
I recently got an SSD and want to switch to using the noop IO scheduler permanently. I understand how to change the scheduler at runtime, but where can I put the command to make it apply on bootup?
I know you can pass "elevator=noop" to the kernel, but that sets all the drives to that scheduler, which I don't want as I still have ye olde spinning drives too - I just want a single drive set to noop..
I'm guessing there's an init script somewhere which is ideal for this, but I've no clue which!
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Feb 6, 2010
Is there a DEB of the 2.6.32 Kernel with the BFS Scheduler built in? I'd like to give it a run, but I'm not so sure about compiling it on my own.
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Apr 9, 2010
I have seen tutorials all over the web on how to use this, but I can't find the Task Scheduler anywhere on my system. I'm using 9.10.
Can anyone point me in the right direction?
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Oct 5, 2010
When I try to schedule a task with kcron, It doesnt work. I installed it with sudo apt-get install kcron. Now it appears in advanced system settings.If I test the task with the run now button the task works correctly. However, when the set time arrives, the task is not performed automatically. I have tried both the personal user cron and the system cron.
By the way, when I try sudo service crond restart, It says service not recognized and when I use sudo contab -e, the file is empty. It should have something since I added an entry in the system's cron in the kde schedule manager.
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Jul 20, 2010
I recently loaded ubuntu 10.04 on an older laptop to get a feel for using a GUI version. I would like to setup a recurring job schedule to start sound recorder or Audacity. I would prefer it was from a graphical user interface but would do it with a cron if I could get started.
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Jul 8, 2010
I'm having a problem with Vuze locking up when I use the speed scheduler plugin. I never had this issue when I was using them in windows.
Here is whats happening. I have speed scheduler set to pause my seeds during the day. sometimes when it pauses a finished torrent the status of the torrent will be stuck on "stopping". When it does this my bandwidth up and down drop to 0 and I cannot download new torrents. I cannot removed the "stopping" torrent or even restart it. Vuze just kind of locks up. I have to kill the java process and restart Vuse before I can get it working again.
I'm running the latest version of Vuze and the speed scheduler plugin on Ubuntu 10.04.
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Jul 12, 2010
I'm trying to run a command with the 'at' scheduler in Linux Mint 9. It's basically a ssh connection to my Smoothwall firewall to tell it to shut down, but that part isn't really important. The problem I have is that I can't get the 'at' schedule command to do much. I can type commands into the terminal and they work perfectly. If I enter exactly the same command into 'at' nothing happens.
For example, I can type 'plink -load smoothwall' into a terminal and a new ssh terminal comes up asking for my password to make an ssh connection. If I create an 'at' job with the same command, ie:
Code:
$ at now + 5 minutes
at> plink -load smoothwall
at> <Ctrl-d>
$
then nothing at all happens when the 5 minutes are up. I've checked that the job exists by doing an 'atq' command. Obviously there's something about 'at' that I don't understand. I've googled, I've looked in this forum and I've looked in a copy of 'The Linux Bible 2010' all without success. I've tried various alternative ways of entering the command for a couple of hours and I'm still stuck.
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Feb 9, 2011
I am trying to write a BASH script that will help people print on Linux Servers (CentOS). I am asking the file in the script. We use a print server That have specific named print queue/ports.
The syntax I am using is:
lpr -H at-test.college.edu:Test-BWQ -U test test.doc
and I get a "lpr : Error - Scheduler is not responding!".
[Examples used:]
Server: at-test.college.edu
Port/queues: Test-BWQ
user: test
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Jun 9, 2010
So how do I get real USB performance back? On older kernels, copying files to USB sticks, I'd get 30Mb/s. Struggling to get 4Mb/s now. What settings can I change?
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Nov 16, 2009
I have made a vb6 porgram, it is running without any error in windows platform. However, i want it to be run at Fedora too. I run my program with Wine Windows Program Loader in a Linux pc, but the program stuck with an error message:
Run-time error '429':
ActiveX component can't create object
I thought it was the error message because of missing some dll/reference files, so I tried to copy all those related .dll & .ocx file into my wine file. (Just copy and paste into the system32 of wine, no regsvr32 statement to register the .dll as what we always do in Windows.) However, all my efforts are in vain. I not sure what is the cause of this error.
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May 13, 2011
i am running linux kernel 2.6.32-30 and my aim is to do packet aggregation in linux,so i created a qdisc simple one like sch_fifo.c and i wanted to put upon the dequeue function but when i attach my qdisct with tc qdisc add dev wlan0 root aggregate my screen just go black and in var/log/messages it says 31 m of stolen memory.graphic perfomance may suffer. can you somebody pls help me. Below is my dequeue function.
static struct sk_buff *aggregate_dequeue(struct Qdisc *sch)
{
struct sk_buff *skb;
struct packet_buffer *packet_buffer = {0};
packet_buffer->size=0;
skb = __skb_dequeue(&sch->q);
[Code]...
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Mar 20, 2011
When I boot , I find a line: starting deferred execution scheduler: atd failed. How to do with it? I use Debian 6.
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Apr 30, 2010
I have created a simple download schedular with source-code give below :
---------------------record_strokes.sh-------------------
touch /home/student/packs/lynx/logfile
lynx -cmd_log /home/student/packs/lynx/logfile
[code]....
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Mar 22, 2016
Following VMware recommendations on how to change linux I/O scheduler for guests, I'm trying to do it on my VM machine running Debian Wheezy. At the moment I'm running kernel backports:
Code: Select all$ uname -a
Linux brutus2 3.16.0-0.bpo.4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u3~bpo70+1 (2016-01-19) x86_64 GNU/Linux
The default I/O scheduler at the moment for device /dev/sda is CFQ, and I can change it on the fly to NOOP:
Code: Select all$ cat /sys/block/sda/queue/scheduler
noop deadline [cfq]
$ echo noop > /sys/block/sda/queue/scheduler
$ cat /sys/block/sda/queue/scheduler
[noop] deadline cfq
[CODE]..
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Jan 17, 2011
I am new to the forum and new to Linux.
I am trying to explore if Linux can be run on a multicore platform when the max frequency of one the cores is less than the others.
please give me some pointers or let me know if you have tried such HW configuration.
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Aug 7, 2010
trying to save abit of power where i can, this is from my fileserver/htpc, a zotac gf 9300 itx motherboard and a underclocked e3300 at 100mhz on fsb. is there any way i can lower the amounnt that these processes wake up the cpu?
Code:< Detailed C-state information is not P-states (frequencies)
1250 Mhz 0.1%
1000 Mhz 0.0%
800 Mhz 0.0%
600 Mhz 99.8%
[Code]...
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Apr 30, 2010
I have created a simple download schedular with source-code give below :
---------------------record_strokes.sh-------------------
touch /home/student/packs/lynx/logfile
lynx -cmd_log /home/student/packs/lynx/logfile
[code]....
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Jan 31, 2010
Did you play too much with compiz and after-a-while you realize that certain functions are not working anymore?
Well, just follow the steps below:
Quote:
gconftool-2 --recursive-unset /apps/compiz
Then,
Quote:
Restart your PC / lappy
[URL]
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Aug 21, 2011
i have a computer with 3 users on it, and a folder using samba that everyone on the network has access to. Lets say that, the folder is stored in /etc/sharedfolder. What happens is, when user1 puts a folder in it, then logs off, user 2 attempts to modify it and fails, because permission is set to 755, and they are not in the same group. (even if they were, it should still need to be 775) Anyway, my current solution is, every 5 minutes a crontab changes permission like so: chmod 777 -R /etc/sharedfiles && chown useradmin:superadmin -R /etc/sharedfiles Which works, but seeing as there is getting close to a gig in there, this is a bad solution, as it eats up the computers resources. Solutions that i think might work:
1) create a script that only changes permissions that need be changed.
2) change file permission settings to force all documents to inherit parent document settings
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Jan 21, 2010
I need a download manager software with scheduler and auto-shutdown ability for linux. I google it and found many of them, but all of theme can auto-shutdown after all download finished!I need something like Free Download Manager (FDM) in windows that schedules auto-shutdown at a specific time and date!Now I'm using cron. but I want the download manager do this for me.
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Jul 28, 2010
I recently read about "at" and thought it was neat, so I wanted to try it out. Unfortunately, it doesn't seem to do what it's supposed to. I would type: at now + 1 min
Then in the prompt I would type:
echo hello
zenity --info --text="HELLO"
<Ctrl+D>
I confirm the job is entered with "atq" and sure enough, the job is there, for the correct time. When the time comes around, nothing happens, and the job disappears. I don't see any text in the console, nor do I see a zenity infobox pop up.
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Aug 12, 2010
as we all know Process Scheduler does Process scheduling and its a process as well. I was just wondering that if this happens then the Process "Process Scheduler" should be a part of Process queue as well.
So if there are 5 process are there in Process queue & process scheduler is administrating them then since its also a process, once it puts a process under RUN state it should itself go inside queue because at one instant only one process can get executed on a processor. This is quite confusing for me. Please help me out. I tried to search on this but could not find any relevant topics.
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Jun 23, 2010
I the Linux kernel 2.6.32, The CFQ scheduler has been changed as you probably know. They insert the 'low_latency" mode in it.I read that this option, actually limits the affect of the dirty data write from the buffer cache while the system doing sync IO.
From url:
Quote:
"the amount of async writeback sent to the device will be limited by the time since that last sync IO." "limiting the damage that the async IO can do while sync IO is also happening"
I also read that this option is not recommended to Database server.As I know, DB writes his DB files with O_DIRECT and won't write to the Filesustem buffer cache.SO this option don't need do bother him.
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Aug 21, 2010
I am using Fedora 13 x86_64 on a Acer Aspire 7730ZG laptop with: 01:00.0 VGA compatible controller: nVidia Corporation G98 [GeForce 9300M GS] (rev a1) I have kmod-nvidia-2.6.33.6-147.2.4.fc13.x86_64-195.36.31-1.fc13.2.x86_64 installed from rpmfuison when I plug in the hdmi cable to the tv, my tv says the resoultion is at 720p, and I can not get any of the resolutions settings to look right on seperate x screen with the nvidia X server settings gui. my tv is a vizo 42inch. also another question is their a way to set the video card to output at 1080? this might be part of my problem?
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Sep 28, 2010
I have a triboot windows suse 11.3 stable and suse 11.3 factory pc, I would like to share the browsers and email settings between the suse stable and factory, I succeed with thunderbird and firefox moving the /home/.thunderbird and /home/.mozilla in an ext3 shared partition and linking these in the respecive /homes, I found that there isn't a /home/.chromium folder, I found probably /usr/lib64/chromium could be the same as /home/.mozilla for firefox, but I don't know if is secure or can damage my system to move this in a ext3 partition and then link this to the respective /usr/lib64/chromium, /usr/lib64/chromium has root owner, root group, visible and modifiable for root and only visible for group and other.
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Apr 1, 2011
Is there a way I can save system settings and have yast revert to a config file in case I ever need to reinstall the system again? I hate having to configure the firewall, runlevels, samba shares, samba workgroup, apparmor, and all the other junk after every install. It's not like I install often, but should suse 11.5 or 12 roll out, I'd like it to be a snappy upgrade.
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Oct 18, 2009
I am running a debian squeeze machine on a ibm t40 laptop with window maker as my window manager. I am using gpointing-device-settings as a program to get the scroll bar on my touch pad working. unfortunately, I can't get the settings to stick after i shutdown and turn on. I have to go into the program and unclick then reclick the button. i'm using version 1.3.2 (ive tried both deb and source versions). does anyone have any ideas on how to fix this? and if there is any configure files that I could configure instead of having to use the gui program.
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Aug 12, 2010
I'm trying to create a user account for my children in Ubuntu 10.04
When creating their account, I have turned off the 'Connect to ethernet and wireless' option of the Advanced Settings.
However, when I log into their accounts, they still have full access to the internet through both the wireless and ethernet connections. Is this option for some other purpose?
Is there an alternate way to limit internet access for childrens' accounts in Ubuntu? (I'm used to MS Family Safety as a filter for internet access - is there an eqivalent for Ubuntu?)
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Feb 19, 2010
I have two major issues, and one minor one, after I started using Ubuntu, I tried searching the forum for them, but couldn't find anything relevant to my problems.First issue: Screenshots and the cursor.This is probably a very easily fixed issue, but none-the-less, I can not figure it out.How do I NOT include the cursor in my screenshots on Ubuntu 9.10?What I do is, I press the Prt Scrn button, and my cursor is always there in the image, and I don't want that.Second is pidgin.I love it, but every time I boot it up, my friendly name is reverted back to firefoxfag.I think it has something to do with me using gmail for msn, but I'm not sure...Also, as a last very small issue, the global hotkeys on audacious don't respond unless i open preferences, open settings for global hotkeys, then close down the settings..
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Sep 1, 2011
I'm looking for the easiest or cleanest way to copy a user's settings to a new user's settings. I don't need to copy any files from the original user, but setting up a home directory would be great.
If it's done at the command line, that would be just fine. I'm very familiar with working at the command line.
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