Servers Videos
SELCOtv - Tech Time
from recent posts tagged libraries - blip.tv (beta) on November 17, 2009
Duration: 142
Duration: 142
Donovan Lambright, SELCO's Automation Librarian, talks about the regularly scheduled times set aside for server maintenance.
also in: Selco Selcotv Libraries Library Servers Educational
proxy Generating Software
from WebDevelopmentandSites - recent posts - blip.tv (beta) on November 11, 2009
Duration: 164
Duration: 164
http://proxygenerator.blog.com/ Proxy Generator is a friendly and easy-to-use automated Proxy generating tool that allows you quickly generate thousands of fresh proxies worldwide and very easy to use.
also in: Address Bypass Checker Configuration Development Elite Free Fresh Http List Online Open Proxies Proxy Proxys Public Servers Severs Sites Socks Web
Three Sysadmin Mistakes Start-ups Make
from building43» building43 on November 11, 2009
Duration: 0
Duration: 0
We often get the opportunity to help out our fellow starts-ups with their servers. While being a start-up with scaling issues is a sign that things are going well, sometimes such a small team does not have the expertise to make sure all their servers are in order. We wanted to share a couple pitfalls that we have helped diagnose in hopes to prevent other start-ups from doing the same thing. 1. Switching web servers when in trouble All the sudden your web server has a 10.0 load average and the Apache process is hogging memory and pegging the CPU. What do you do? Switch out Apache for nginx, of course. Just kidding! Although, you would be surprised how often the web server gets swapped out during a time of peril. Under extreme loads (such as benchmarks) some web servers out perform others in subtle ways. However, under normal growing start-up load, slow downs are more likely due to misconfiguration or poorly written application code. If you switch to another web server, you might luck out and get a better default configuration, but that is about it. A few things to keep in mind while administering a web server: Swap is a killer. If you hit swap, your entire machine (including your webserver) will slow down dramatically. To diagnose what is going on: run top, press capital M (on current Ubuntu/Debian), and you will get a list of the top memory users. If your webserver is using more than 20-40MB RSS per process, you probably have something configured incorrectly (too many modules loaded, wacky app code, etc). Memory usage of an web server is just a math equation. If you are using Apache with the prefork MPM, each connection requires a new Apache process. If you have something like PHP loaded up in each of those processes, each one will come in around 10-20MB. This means you could only sustain around 100 concurrent connections before running out of memory on a 1GB machine. To get around this particular example, use the worker MPM with Apache, which adds about 1MB overhead per connection via threading. Serving static content is the easiest possible task for any web server. Doing a reverse proxy from Apache to lighttpd (for example) for just static content will get you nothing but complexity that is unless you have Apache misconfiguration to serve static content through your framework. Do not offload your static content unless it is to get load off your application server such as by using a reverse proxy cache. Check your error log! Error logs are a great way to see what is going wrong, yet often go overlooked. 2. Using sqlite in production Many frameworks, including Django and Rails, make it easy to use sqlite as a test database. However, sqlite should never be used in production. It is important to remember that sqlite is single flat file, which means any operation requires a global lock. Locks will inevitably cause points of contention if the database gets even remotely busy. On top of that, your web server will appear to peg the CPU when under load. This is because of all that contention around the lock. The moral of the story is to use mysql or postgres in production. These relational databases are heavily optimized for production environments, and will make your app much more responsive. 3. Forking in app code Sometimes the first pass at a webapp does some crazy stuff. This crazy stuff might involve system calls, such as renaming a file, or checking the last modified date of an image. While issuing system calls per web request might not be the best idea in the first place, under no circumstances should you fork. If you fork inside an app server, such as mod_python, you will fork the entire parent process (apache!). This could happen by calling something like os.system( mv foo bar ) from a python application. It is important to remember that os.system uses the system libc function, meaning that it forks and passes the args to your default shell. Overlooking the security implications of this (of which there are many), this causes big performance problems. Fork is one of the most expensive system calls, and should never be used on a per request basis. Moral here: If you have to use system calls (which you should try not to anyway), never use use fork. Use the native stuff, like (in python) os.rename, os.stat, etc. Hopefully sharing these examples keep future projects from running into scaling trouble before they need to. If you ever have any questions about this or just running servers in general, feel free to email support@cloudkick.com. This post comes from Alex Polvi (@polvi) from CloudKick. CloudKick is a Rackspace partner and a free way to manage your infrastructure across the Rackspace Cloud, Slicehost, or EC2. Check out their blog for more info as well as a project Alex is working on called LibCloud, a client library that just made writing cloud apps in Python a lot easier. If you have Python friends, be sure to mention this project to them because you might make their day.
also in: Blogs Alex polvi Building43 Cloud tools Cloudkick Free cloud management Libcloud Manage cloud servers Manage servers cloud Manage Servers Ec2 Rackspace Manage servers free Start Manage slicehost servers Rackspace cloud tools Sysadmin startup
ENERGY STAR* for Servers Update – Intel Chip Chat – Episode 65
from Connected Social Media on November 10, 2009
Duration: 0
Duration: 0
In this Intel Chip Chat podcast with Allyson Klein, returning guest Andrew Fanara from the EPA discusses the progress being made on the ENERGY STAR* for servers spec. Server Energy Efficiency Initiatives The Server Room
also in: Social Media Blogging Corporate Marketing Podcasting Podcaster Technology Seo Sem Twitter Facebook Brand Engagement Management Business Business News Technology Tech News Business Management Marketing Business Careers Technology Gadgets Business Business News Tech News Management Marketing Careers Gadgets Intel Intel Chip Chat Data centers Energy Star Environment EPA Servers Sustainability
Megan Fox Playing Call of Duty Modern Warfare 2
from YouTube :: Tag // Megan-Fox on November 10, 2009
Duration: 44
Duration: 44
Author: o0revenger0o Keywords: Call of duty modern warfare call free xbox ps3 lockerz no scam 100% gameplay screenshot demo team death match tdm search and destroy sabotage pc dedicated servers FREE 360 playstatoin cod6 cod4 mw2 cod briteny spears sex porn fuck angelina jolie megan fox miley cyrus plays COD6 Added: November 10, 2009
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IT Sustainability – Taking Sustainability To The Next Level
from Connected Social Media: The Intel Channel on November 06, 2009
Duration: 0
Duration: 0
In college Dean Blevins was recycling, and even met a certain someone across the street because of it. Now he s involved in paring down servers at Intel to save energy and costs. More on IT Sustainability from Intel
also in: Intel VPro WiMAX Wireless Core Duo UMPC Netbook Chip Chat OpenPort Gaming Nehalem Moore Law Technology Tech News Business Business News Business Management Marketing Technology Tech News Business Business News Management Marketing Education Educational Technology IT@Intel Dean Blevins Energy savings Green IT IT Sustainability Recycling Server Refresh Servers Sustainability
Watch Terminator 3 Rise Of the Machines Movie and Download
from recent posts - blip.tv (beta) on October 25, 2009
Duration: 99
Duration: 99
Watch Terminator 3 Rise high quality movie online or download full movie from fast and instant servers right now
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VideoTutorial Instalar Skins CSS Y Steam
from Dailymotion - most recent videos on October 15, 2009
Duration: 743
Duration: 743
Como Descargar y Instalar Skin de Steamy del Counter Strike Sourceen Español para fans del www.clan-cta.comAuthor: eRTr0n0s Tags: comunidad tactica asalto rajuvi servers presentar skin del counter strike source español mas dos steam videotutorial para clan cta Posted: 16 October 2009 Rating: 5.0 Votes: 1
also in: Comunidad Tactica Asalto Rajuvi Servers Presentar Skin Del Counter Strike Source Español Mas Dos Steam Videotutorial Para Clan Cta
Server Farms
from KQED's QUEST Science Radio on May 19, 2008
Duration: 345
Duration: 345
Server farms - those huge collections of computers that run the networks of Google, Yahoo, and other companies - are enormous users of energy. QUEST looks at efforts to make the information superhighway more efficient.
also in: Energy Energy-saving technology Energy conservation KQED Natural Sciences Pbs QUEST Radio Science Medicine Servers Server farm