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Kernel Recipes 2015 - Linux kernel IO subsystem - by Jan Kara
 
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Understanding how Linux kernel IO subsystem works is a key to analysis of a wide variety of issues occurring when running a Linux system. This talk is aimed at helping Linux users understand what is going on and how to get more insight into what is happening. First we present an overview of Linux kernel block layer including different IO schedulers. We also talk about a new block multiqueue implementation that gets used for more and more devices. After surveying the basic architecture we will be prepared to talk about tools to peek into it. We start with lightweight monitoring like iostat and continue with more heavy blktrace and variety of tools that are based on it. We demonstrate use of the tools on analysis of real world issues. Jan Kara, SUSE
Views: 4364 hupstream
Tutorial: How To Change Linux Kernel I/O Scheduler at Boot
 
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In this video I detail the necessary steps required to change the I/O Scheduler in the Linux Kernel at boot. Appreciate what I do? Grab me a coffee! http://goo.gl/wmHh4 Twitter: http://twitter.com/OhHeyItsLou Facebook: http://www.facebook.com/OhHeyItsLou Google+: gplus.to/OhHeyItsLou Blogger: http://ohheyitslou.blogspot.com Steam: IDIefiant
Views: 3881 OhHeyItsLou
Scheduling Tasks in Linux - The CRONTAB Command
 
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Scheduling Tasks in Linux - The CRONTAB Command and utilizing the cron daemon to schedule repetitive or chronic tasks on a system.
Views: 149619 Carly Salali
25 Feb 2013: Linux and Linux Scheduling
 
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The evolution of the Linux scheduler is used as a window into the Linux development community. Contributions of Con Kolivas are discussed and the Rotating Staircase Deadline Scheduler is introduced.
Views: 8283 Geoffrey Challen
Task Scheduling in Linux with cron:  Linux Server Training 101
 
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http://www.soundtraining.net-linux/server-training-101 The cron utility allows Linux administrators to schedule tasks such as scripts and utilities to run at specific times in the future. In this video, you'll learn the tools to use to configure and modify cron and where the cron files are stored.
Views: 18415 soundtraining.net
Cron Program Scheduler Frontend - Linux KDE
 
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Package: kde-config-cron Description: program scheduler frontend kde-config-cron is a KDE configuration module for scheduling programs to run at specific intervals using cron, the UNIX scheduling service. This package is part of the KDE administration module. Homepage: http://www.kde.org/ -------- Package: cron Description: process scheduling daemon The cron daemon is a background process that runs particular programs at particular times (for example, every minute, day, week, or month), as specified in a crontab. By default, users may also create crontabs of their own so that processes are run on their behalf. Output from the commands is usually mailed to the system administrator (or to the user in question); you should probably install a mail system as well so that you can receive these messages. This cron package is configured by default to do some basic daily system maintenance tasks, such as creating backups of key system files. Other packages, such as checksecurity, can provide further maintenance tasks. The lockfile-progs package is recommended as it will prevent /etc/cron.daily/standard from running multiple times if something gets jammed. Homepage: http://ftp.isc.org/isc/cron/
Views: 2512 gotbletu
Job Scheduling Using At Command ||Task Scheduling in Linux with cron ||
 
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The cron daemon on Linux runs tasks in the background at specific times; it's like the Task Scheduler on Windows. ... First, open a terminal window from your Linux desktop's applications menu. ... Use the crontab -e command to open your user account's crontab file. ... You may be asked to select an editor.
Views: 41 Linuxedusy edusy
Markus Pargmann: Linux Kernel CPU Scheduler 101
 
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http://media.ccc.de/browse/conferences/eh2015/eh15_-_8_-_de_-_saal_-_201504041300_-_linux_kernel_cpu_scheduler_101_-_markus_pargmann.html Der Linux Kernel läuft auf sehr vielen unterschiedlichen Systemen, vom eingebetteten System mit einer CPU bis zu Supercomputern mit mehr als 1000 CPUs. Der Scheduler muss auf all diesen Systemen zuverlässig und schnell funktionieren mit guten Scheduling Entscheidungen. Der Vortrag gibt eine Einführung in die Thematik des Scheduling im Allgemeinen und im Linux Kernel. Im speziellen wird auf den 'Completely Fair Scheduler' eingegangen, dessen grundlegendes Konzept und die Implementierung im Linux Kernel. Markus Pargmann
Views: 2348 media.ccc.de
Gang Scheduling in Linux Kernel Scheduler - Nikunj A  Dadhania
 
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Operating System scheduler assigns the most eligible process to run on a CPU. On a multi-CPU system, tasks are assigned to CPUs independent of each other. The scheduler may not look into inter-process dependencies while assigning processes. Hence, at any given point in time, the set of processes that is running on the system might not be the optimal one. Gang Scheduling is a method to schedule a group of inter-dependent processes on different CPUs simultaneously.
Scheduling Jobs in Linux
 
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Basic introduction to crontab and at commands.
Views: 16204 Jason Wertz
Task scheduling in Linux
 
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A short tutorial on how tasks are scheduled in linux using crontab (crond daemon). The video tells about schedulin a particular command or task to schedule at the time you specified.
Views: 1562 abhi_11005
YARN - FIFO Scheduler
 
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FIFO Scheduler is the default scheduler in Apache Hadoop .It acts just like a queue.We can change the scheduler to FIFO from Cloudera Manager - YARN - Configuration.For Complete play lists please visit https://www.youtube.com/c/HadoopEngineering/playlists .
Views: 754 Hadoop Engineering
Scheduling Tasks in Linux   The CRONTAB Command
 
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Scheduling Tasks in Linux - The CRONTAB Command #linuxcrontrab #linuxjobs #basiclinux #TechnicalTechs
Views: 589 Technical Techs
A New Mindset: Teradata Priority Scheduler in Linux SLES 11
 
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Teradata Senior Technical Consultant, Carrie Ballinger, offers advice on migrating to the new Teradata priority scheduler.
Views: 798 Teradata
Set up HMA Scheduled IP Change for Linux
 
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Hit http://www.kqzyfj.com/lh101gv30v2IQSKRJMKIKLNNOLRQ to fully set up HMA Scheduled IP Change for Linux by yourself. Learn more? Useful links: * hma-udp-grabber.sh: http://hmastuff.com/hma-udp-grabber.sh * IP changer script: http://hmastuff.com/hma-scheduled-runner.sh Learn more? * https://www.youtube.com/watch?v=vjWADPRxxA8 Set up HMA PPTP/L2TP/OpenVPN on iOS * https://www.youtube.com/watch?v=3gJdVNgcTGc Fix HMA VPN Profile Configuring Error * https://www.youtube.com/watch?v=nwqq7RnQM7g Troubleshoot HMA VPN Frequent Disconnections
Views: 113 HalfGēk
The Linux Scheduler: a Decade of Wasted Cores - Papers We Love SG
 
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Speaker: Yeo Kheng Meng The Linux Scheduler: a Decade of Wasted Cores - Lozi et al. 2016 https://www.ece.ubc.ca/~sasha/papers/eurosys16-final29.pdf Slides: http://www.slideshare.net/yeokm1/the-linux-scheduler-a-decade-of-wasted-cores Event Page: https://www.facebook.com/events/1165587513465235/ Produced by Engineers.SG Help us caption & translate this video! http://amara.org/v/KG2o/
Views: 1451 Engineers.SG
Collaboration Summit 2013 - Using Task Load Tracking to Improve Kernel Scheduler Load Balancing
 
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The Linux Foundation Collaboration Summit 2013 San Francisco, California Using Task Load Tracking to Improve Kernel Scheduler Load Balancing By Morten Rasmussen The increasing focus on power-efficiency in multi-core servers and mobile devices means that it is crucial that the kernel scheduler does its best to balance load across as few active cpus as possible without sacrificing performance. The task load tracking introduced in 3.8 makes it possible to get better estimates of cpu load and individual task load weight. Integrating this with active use of available cpu capacity enables packing of small tasks to minimize wake-ups and better balancing of large tasks. The main theme is increasing focus on scheduler power awareness among developers in the Linux community. The presentation goes through proposed modifications that extends the use of load tracking and cpu compute capacity, and shares experimental results. Key topics: Packing tasks, minimizing wake-ups, DVFS scaling of compute capacity, and compute capacity driven large task placement.
How to Change Default Shell for Linux
 
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How to Change Default Shell for Linux. http://wikis.ece.iastate.edu/it/index.php/Changing_Default_Shell_for_Linux
Views: 203 ISUCSG
Linux Tip | How to Upgrade or Downgrade Kernels in LM 18.2
 
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Please join the discussion at EzeeTalk. https://www.ezeelinux.com/talk/ It's free, secure and fun! Here's a look at how you change kernels in Linux Mint 18.2. Please be sure to give EzeeLinux a 'Like' on Facebook! Thanks! https://www.facebook.com/EzeeLinux Check out http://www.ezeelinux.com and http://www.freedompenguin.com for more about Linux.
Views: 7876 Joe Collins
Veloces : An Efficient I/O scheduler for SSD's
 
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made with ezvid, free download at http://ezvid.com
Views: 225 Sarvesh Rangnekar
Scheduling in Linux (from 2.2 to OS X Mavericks)
 
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cs4414: Operating Systems (http://rust-class.org) Class 12: Scheduling in Linux and Web Servers Embedded notes are available at: http://rust-class.org/class-12-scheduling-in-linux-and-web-servers.html Segment 2: Scheduling in Linux (from 2.2 to OS X Mavericks) Linux Scheduler in 2002: the O(N) scheduler O(1) scheduler "Completely-Fair Scheduler" Saving Energy in OS X Mavericks
Views: 3134 David Evans
Overview of the Linux scheduler framework (Marco Cesati)
 
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http://retis.sssup.it/rts-like/program.html#intro-cesati
Views: 1254 Retis Lab
Run a PHP Script Automatically at a Specified Time
 
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Access the full course: https://www.udemy.com/php-email/?couponCode=YAPA1 So you have a PHP script you want to execute on a regular basis. Although you could run it manually, it would be much easier if you could do it automatically. You can do this with cron on Mac and Linux, and with Task Scheduler on Windows.
Views: 65423 Dave Hollingworth
LCE13: Why all this sudden attention on the Linux Scheduler?
 
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Why all this sudden attention on the Linux schedule
Views: Linaro On Air
Linux Basics -- Scheduling Tasks with Cron
 
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Full Linux Sysadmin Basics Playlist: https://www.youtube.com/playlist?list=PLtK75qxsQaMLZSo7KL-PmiRarU7hrpnwK Check out my project-based Linux System Administration course (free sample videos): https://www.udemy.com/hands-on-linux-self-hosted-wordpress-for-linux-beginners/?couponCode=tl35 Official Site: https://tutorialinux.com/ Twitter: https://twitter.com/tutorialinux Facebook: https://www.facebook.com/tutorialinux About this Video: A quick introduction to cron for people who want to manage scheduled and recurring tasks on Linux systems. This is useful for system administrators, developers/programmers, and everyone who wants to do things like - occasionally cleaning out old files - removing development clutter - scheduling things on servers or other remote machines - If you have something more exciting, leave it in the comments and I'll put it here :-D. We also touch on slightly more advanced topics such as security considerations and cron.{allow,deny}
Views: 63692 tutoriaLinux
Embedded Linux Conference 2013 - Adventures in (Simulated) Asymmetric Scheduling
 
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The Linux Foundation Embedded Linux Conference 2013 Adventures in (Simulated) Asymmetric Scheduling By Pantelis Antoniou San Francisco, California Asymmetric processing, spearheaded by ARM's big.LITTLE architecture, has been touted as a method for solving both the power & performance problem of mobile devices. This architecture requires changes to core scheduling concepts, which are extremely difficult to debug and diagnose, especially since existing tools do not capture useful data for evaluating such a system. A brief overview of the proposed scheduling changes will be presented, with major focus on Paul Turner's load average patches. Methods of simulating an asymmetric system will be described. Additionally a portable process workload capturing method, based on perf, will be presented, i.e. one can capture traces from an Android based system and run it on a standard Linux box. The audience will comprise of kernel scheduler hackers, mobile device developers, and anyone interested in the challenges such a paradigm shift brings.
17 Feb 2012: A Scheduling Story
 
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Introduction to Linux development, tensions in scheduler evaluation, and Con Kolivas' quest to change the Linux scheduler.
Views: 254 Geoffrey Challen
Linux Scheduler visualization
 
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Screencast of "Blink1", a software written by Moritz Klammler. It visualizes the current Linux scheduler. This is used for a German article about Linux schedulers: http://martin-thoma.com/linux-scheduler/
Views: 1726 Martin Thoma
Laravel 5.1 Artisan Command and Scheduler to manage crons
 
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Laravel 5.1 comes with an awesome Scheduler which helps you manage all your application's cron through code base. This is really a helpful tool but your app is big and you have a lot of crons running on the server doing some maintenance tasks.
Views: 35429 Amitav Roy
The Future of Power Management in Linux
 
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Rafael J. Wysocki http://linux.conf.au/schedule/presentation/30/ Power management has been an important part of Linux kernel development for the last several years. Support for many important power management features, such as system suspend and hibernation, CPU idle states management, CPU frequency management, runtime power management of I/O devices and more, has been added to the kernel during that time. However, there still are challenges facing the Linux power management developers. The first challenge is that the majority of power management features available in the kernel today were developed in isolation and while they work reasonably well individually, they may not play so well with each other. At the same time, hardware design trends lead to more and more integration and there is a clear need for the Linux power management features to work more closely together too. For this reason, there have been efforts to integrate runtime PM of I/O devices with system suspend and hibernation for some time. There also is work in progress on integrating CPU power management with the CPU scheduler. All of that work will likely continue into the future. Further challenges are related to new types of hardware that become available, like persistent memory. Traditional power management features, like system suspend and hibernation, will have to be rethought and modified in response to that and some other changes will likely become necessary in the power management area. There also are challenges coming from new display technologies and networking that require relatively high power to be allocated to the transmission of data alone putting the other components of the system under power pressure and causing them to be effectively underutilized. Similar problems appear when system are thermally challenged or when their power supplies are not capable of supporting all of the system components at full capacity at the same time. All of this means that the future of power management in Linux will certainly be interesting. We have many interesting problems to solve and quite a lot of work to do, but hopefully power management in Linux will work really well going forward.
EOS Bits & Bytes - Episode 4 "Kernel Scheduler"
 
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Episode 4 - Kernel Scheduler Comments/Suggestions: https://eos.aristanetworks.com/video-comment
Views: 1305 Learn Arista EOS
Advances in CPU Frequency Management
 
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Rafael J. Wysocki http://linux.conf.au/schedule/presentation/131/ Quite significant and radical changes were made in the kernel's CPU frequency management (CPUFreq) subsystem over the last year. The most significant of them was the switch from using timers to a new control flow based on governor callbacks invoked by the CPU scheduler. That change made it possible to clean up the CPUFreq core quite substantially and to add more functionality on top of it. Among other things, a new CPUFreq governor, called schedutil and making decisions based on the CPU utilization information provided by the CPU scheduler, was introduced. Moreover, the scheduler can pass hints to all of the CPUFreq governors now. That opened up new possibilities and, for instance, work is in progress to implement energy-aware scheduling (EAS) on top of the schedutil governor. Apart from that, improvements are being made in the other parts of the CPUFreq subsystem as well, which leads to an optimistic outlook on its future.
MySQL - Remote Access to MySQL Server on Linux CentOS 6.3 Part 1
 
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In this tutorial I talk you through installing and configuring a MySQL server to allow remote access on Linux using CentOS 6.3. So first, download and install the mysql server: yum install mysql mysql-server Next make it so as the mysql server with be running on server startup, issue the following command: chkconfig mysqld on Next start the mysqld service service mysqld start Next run the command /usr/bin/mysql_secure_installation in order to set the root password and to delete other users and ultimately to stop the root user from having remote access. Then you can access the mysql server, to make a new user, which you can login in as rather than using the root user all of the time. We then editted the /etc/my.cnf, to allow the server to be access remotely only on the address of 10.10.10.30, which was the static ip address of this machine which we install the mysql server on. We add the following line to this file below the area which is [mysqld] bind-address=10.10.10.30 Note: this ip address needs to be static ip address of this single machine. Next we added a rule to the firewall by editting the /etc/sysconfig/iptables file, by adding the following line to it, above the ssh line: -A INPUT -p tcp -m state --state NEW,ESTABLISHED -m tcp --dport 3306 -j ACCEPT Once you have save and closed this file, restart or reload the iptables: service iptables restart Potentially, this is the server ready to be used remotely, although you are still required to add a user which has the correct privileges: No more space available...best just watch the video!!!!
Views: 51171 Davids Videos
Power Linux with Skybot Scheduler
 
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As Linux is edging out to be one of the most flexible servers, so Skybot is becoming one of the most flexible and robust automation tools to scale the types of big data workloads and cross-platform events that Linux is handling with ease.
Views: 146 HelpSystems
I/O Scheduling in CAM
 
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SSD have many unique characteristics not present in spinning drives. Applications have different access patterns and desire different performance trade offs. Geom offers some scheduling facilities, but they are hampered by no visibility into the underlying device's characteristics. Scheduling I/O in CAM allows peripheral drivers to use their detailed knowledge of a drive to schedule I/Os that are optimal for the application's needs (with hints from the application) Netflix operates a small fleet of Video servers for its Video Streaming service . There are two main kinds of server used in our operations. We have a storage appliance, which is used for long-tail access and filling other servers. We have a Flash appliance for serving popular titles. Our service has a certain amount of change each day, as titles change in popularity, contracts expire or come on line, etc. While our workload is read mostly, we also need to write and trim the drive from time to time. With flash drives we found any sustained write activity above a certain level lead to a sudden decrease in the read performance, reducing our effective capacity at times when this happens. By clever scheduling, one can reduce these effects to keep read performance good, but write performance will suffer. The traditional scheduler didn't allow any efficient way to do this, short of write throttling in the application. While this does help mitigate things, when there's many threads or processes acting in parallel it can be hard for the application to coordinate everything, and the many layers between the application and the disk can interfere with even perfect coordination. Moving the throttling to the lowest layer in the system helps smooth out the bumps, as well as adapt dynamically to the changing workloads (you can write more, if you need to read less, for example).
Views: 692 Andrea Ross
Linux Backup with TAR and Cron Jobs
 
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Info Level: Intermediate Presenter: Eli the Computer Guy Date Created: September 21, 2010 Length of Class: 35 Minutes Tracks Linux Prerequisites Introduction to Linux Installing Linux Basic Linux Tasks VIM for File Editing Navigation in Linux Users, Groups and Permissions in Linux Purpose of Class This class teaches students how to backup directories using TAR, and demonstrates how to schedule tasks using Cron Jobs. Topics Covered Backing Up Directories with TAR Recovering Directories with TAR Setting Up Cron Jobs for Scheduled Tasks Class Notes Backup Using TAR Backup = sudo tar --cvpzf backup.taz.gz --exclude/=directory (recursive) PATH --c = create new file (overwrites old file) --v = verbose --p = preserve permissions --z = compress --f = filename (very important) --exclude=DIRCECTORY is Recursive Naming Files with time = filename-$(date +%F-%T) Recover Files from a TAR File Recover = sudo tar --xvpzf FILE --C /DIRECTORY Capital -C = change to directory -x = extract Cron Jobs To Edit the Crontab File = sudo cron --e (first time it will ask you your default editor) Format = minute (0-59), hour (0-23, 0 = midnight), day (1-31), month (1-12), weekday (0-6, 0 = Sunday), command * Wildcard for Every Minute/Day/Hour/Month?Day of Week Example to Backup Entire Server for 1am Every Morning = 0 1 * * * sudo tar -cvpzf /backup.tar.gz --exclude=/mnt /
Views: 182307 Eli the Computer Guy
How to: Automatically move files from one location to another using Task Scheduler
 
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VBS script: With CreateObject("Scripting.FileSystemObject") .MoveFile "\\yourlocation\drive$\source_folder\*.*", "\\yourotherlocation\drive$\target_folder\" End With Note: *.* means all files and all extensions. You can tweak this to suit your needs. For example if you want to move all HTML files, change the parameter to *.html Created with the Youtube Video Editor - all right reserved.
Views: 25948 ravencraft
Linux Crontab task scheduler used to backup mysql data autmatically
 
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Download this video http://thehackhub.com/videos/Linux%20Crontab%20task%20scheduler%20used%20to%20backup%20mysql%20data%20autmatically.mp4 This tutorial shows how to usecrontab in linux to schedule tasks to run automatically. In my case i use crontab to backup my mysql database automatically daily and store the file in a backup directory.
Views: 16182 Jacob Dykstra
Velocity 2017: Performance Analysis Superpowers with Linux eBPF
 
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Talk for Velocity 2017 by Brendan Gregg. Abstract: "Advanced performance observability and debugging have arrived built into the Linux 4.x series, thanks to enhancements to Berkeley Packet Filter (BPF, or eBPF) and the repurposing of its sandboxed virtual machine to provide programmatic capabilities to system tracing. Netflix has been investigating its use for new observability tools, monitoring, security uses, and more. This talk will investigate this new technology, which sooner or later will be available to everyone who uses Linux. The talk will dive deep on these new tracing, observability, and debugging capabilities. Whether you’re doing analysis over an ssh session, or via a monitoring GUI, BPF can be used to provide an efficient, custom, and deep level of detail into system and application performance. This talk will also demonstrate the new open source tools that have been developed, which make use of kernel- and user-level dynamic tracing (kprobes and uprobes), and kernel- and user-level static tracing (tracepoints). These tools provide new insights for file system and storage performance, CPU scheduler performance, TCP performance, and a whole lot more. This is a major turning point for Linux systems engineering, as custom advanced performance instrumentation can be used safely in production environments, powering a new generation of tools and visualizations."
Views: 5436 Brendan Gregg
How to change MySQL default storage engine in CentOS 6.7
 
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The process to change MySQL default storage engine in CentOS is covered in this video. A storage engine is a software module used by a database management system in order to create, read, and update data in a database. For more explanation on this video: https://www.linuxhelp.com/how-to-change-mysql-default-storage-engine-in-centos-6-7/
Views: 532 Linux Help
Linux tuning to improve PostgreSQL performance
 
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Streamed live on Jan 21, 2016 Talk by Ilya Kosmodemiansky Linux operating system has lots of tuning options which can change performance of your PostgreSQL installation drastically. For PostgreSQL, obviously, most important are storage-related options like vm.dirty*, IO elevators or filesystem mount options, but there are many more of them: CPU scheduler options, NUMA settings, or even power saving policy. The goal of this talk is to explain to DBAs and engineers how to use all this settings in order to match hardware configuration and PostgreSQL workload. More info at: http://www.socallinuxexpo.org/scale/14x/presentations/linux-tuning-improve-postgresql-performance
Real-world I/O scheduler benchmarks
 
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Tested on Galaxy S6. This is not the most scientific benchmark out there, but should give you an overall idea of which I/O scheduler you should choose.
Views: 8501 Ju Hyung Park
[linux.conf.au 2014] The changing Linux kernel development process
 
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The changing Linux kernel development process Speaker: Jonathan Corbet The process that leads to Linux kernel releases is an amazing thing: it is able to incorporate tens of thousands of independent changes from thousands of developers into a single, coherent product with regular stable releases. This talk will examine where kernel code comes from and how it gets into the mainline with a strong emphasis on how the community has changed in recent years. The community we have is, in many ways, quite different from what it was five years ago; those differences will be discussed with an eye toward their implications for the future. This talk will be of interest to users, developers, and managers working on or with the Linux kernel at any level in the software stack.
Views: 193 TalksDump
LinuxDay Pisa 2013 :Improving Application Responsiveness with the BFQ I/O Scheduler (Paolo Valente)
 
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BFQ (Budget Fair Queueing) is a production-quality, proportional-share disk scheduler with a relatively large user base. Part of its success is due to a set of simple heuristics that we added to the original algorithm about two years ago. The first heuristic enriches BFQ with one of the most desirable properties for a desktop or handheld system: responsiveness. A companion heuristic also reduces latency for soft real-time applications, such as audio or video players. As a result of our heuristics: 1) whatever the disk load is, interactive applications are virtually as responsive as if the disk was idle; 2) soft real-time applications enjoy lower latencies than CFQ; 3) a high throughput is achieved also in the presence of many concurrent requests and sudden increases of the workload. In this presentation I will first show these results through a demo of the performance of BFQ, as compared to CFQ. Then I will provide a few details both on how the low-latency heuristics of BFQ work, and on why they fit the BFQ service scheme. Paolo Valente: I am an assistant professor of Computer Science at the University of Modena and Reggio Emilia, Italy. The main focus of my research and development activity is the design and analysis of real-time and proportional-share scheduling algorithms for CPU, disk and network. Some of my main results follow. Budget Fair Queueing (BFQ): disk scheduler providing low response times for soft real-time and interactive applications, and at the same time a high throughput. Adopted by various Linux distributions and kernel variants, on both desktops and smartphones (estimated user base in the order of a few hundreds of thousands of users). Quick Fair Queueuing (QFQ): packet scheduler providing near-optim al fairness and packet-delay guarrantees, at very low computational cost. Upstreamed in Linux mainline up to 3.6 (then replaced by QFQ+, see below) and in FreeBSD: Quick Fair Queueuing Plus (QFQ+): faster version of QFQ, with execution time comparable to just a round robin. Replaced QFQ in Linux mainline from 3.8: Efficient Proportional-Share Process Scheduler (EPS2): process scheduler providing strong guarantees on job completion times and CPU-bandwidth distribution. Implemented under FreeBSD. Sito Internet: http://algogroup.unimore.it/people/paolo/ Slide disponibili su: https://bitbucket.org/gulp_pisa/repo_gulp/src/c260e985d17c10086fb2983407d71de5c6265982/LinuxDay/LinuxDay_2013/Improving_Applicat_on_Responsiveness_%20with_the_BFQ_IO_Scheduler/?at=master
Views: 148 Gulp Pisa
Oracle DBA Justin - How to set the Oracle environment on a Unix or Linux system
 
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How to set the Oracle environment on a Unix or Linux system
Views: 46562 jbleistein11
800 MHz kernel, pre-empt, no debug, noop IO scheduler, ondemand cpu scheduler
 
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This kernel offers: * 800MHz maximum frequency * Pre-empt enabled * ondemand CPU scaler * noop IO scheduler * Debugging code removed In particular, pre-empt is one of the holy grails as it allows the next step of a realtime kernel using the -rt patches. Demonstration only, not available for public download. Source code for the kernel patch is at git.webos-internals.org - you can build it yourself if you know how. Kernel patch developed by Steve Bromwich and Marco (unixpsycho). Steve is the narrator.
Views: 1420 webosinternals

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