Auto Scaling with Spot Instances; Figuring Out the Correct Bid/Spot Price

Posted June 9th @ 7:30 pm by Boyan Tsolov

I’ve been using Amazon Web Services for about 2 years now. I find it extremely easy and user-friendly. I have full control of my VM and Amazon offers so many ancillary features to help with the IaaS. Unfortunately I also find it a little bit expensive as you start ramping up for a production environment. The pricing of their EC2 instances depends on the Operating System mainly. I use Windows which happens to be the most expensive.

<sarcasm> GREAT! </sarcasm>

Their micro instances for Windows can cost $15/month [all prices are for Virginia]. And their micro instances are not very good on performance: < 1 shared ECU, 750MB RAM. Once you get 3 users hitting an IIS website on that EC2 instance the CPU shoots to 100%.

An instance that I found useful for a production environment is the c1.medium. This one has 5 ECU’s and 1.5 GB of RAM. This is instance is great for high volume internet traffic, BUT this EC2 instance costs $160/month.

When you need to use auto scaling and increase your servers automatically according to traffic demand, $160/server/month can get very expensive. And then when you consider that this is just in 1 region and you need to copy the auto scaling set up in other geographical regions, it can get ever more expensive.

This is where SPOT INSTANCES come in. Spot instances are a life saver in terms of money.

Read the rest of this entry »


Guide to AWS Auto Scaling with Command-Line Tools

Posted January 7th @ 11:49 am by Boyan Tsolov

AWS Auto Scaling Guide

AWS Auto Scaling Guide

The previous blog post spoke about a great tool called EZAutoScaling which offers a web-based interface for AWS Auto Scaling. Amazon currently makes AWS Auto Scaling available only as command line tools or APIs and EZAutoScaling offers an online tool to make managing Auto Scaling easier. There are other companies that offer a web-based interface for AWS Auto Scaling, but EZAutoScaling is definitely the cheapest ($1/month).

To follow up on that blog post, EZAutoScaling has put up a great guide for using the command line tools for setting up AWS Auto Scaling. The steps detail the pre-requisites, how to set up the command line tools (with many screenshots), and what commands to use in order to set up your auto scaled environment.

By posting this guide they are showing two things:

  1. That setting up AWS Auto Scaling is not straight-forward - though it is not super hard either.
  2. If you don’t feel like paying for EZAutoScaling then you can use the guide to set up and use the command line tools for free.

Here is an excerpt from the guide from the “Summary” section which summarizes all of the steps and commands:

Read the rest of this entry »

Amazon AWS Auto Scaling done easy

Posted January 5th @ 12:39 pm by Boyan Tsolov

Auto Scaling Online Tool

Auto Scaling Online Tool

This blog started out as a SaaS blog. After a while it moved into Android. I’m going to bring it back to its roots (sort of) with a post on IaaS (infrastructure as a service). I’ve been using Amazon AWS (Amazon Web Services) for about 2 years now. It has been fantastic. I’ve done research on other IaaS and PaaS providers (Microsoft, Rackspace, etc.) and I am extremely happy with the service, usability, and price that I get from Amazon.

One of Amazon’s cool services is called Auto Scaling. It allows you to automatically add/remove servers from an “Auto Scaling Group” as user load increases or decreases. The Auto Scaling group monitors itself (using a service called CloudWatch) and if an alert occurs then a server is automatically added or removed from the group. (Server are added to handle more user load; they are removed to save you money.)

And for the most part, setting this up is a huge pain in the butt… until now.

But before I describe why it’s a pain, here is an example of how Auto Scaling works:

- You have 1 server running in an Auto Scaling Group
- User load suddenly spikes and that server’s CPU usage is at 90%
- You are asleep, so you have no way of knowing this is happening and thus no way of quickly increasing the number of servers to improve performance for the user spike
- Fortunately, CloudWatch is set up to check if CPU usage is over 90% on that server and if it is it sends an alert/trigger…
- A new server is added to the Auto Scaling Group and added to a Load Balancer that is part of that Auto Scaling Group
- Now, automatically, 2 servers exist in your farm, load balanced, and user load can be handled literally without a hitch. CPU usage is down to 40% on each server and CloudWatch ends the alert.

I use EC2 servers exclusively for some of my projects and for me Auto Scaling is one of the main reasons for using Infrastructure as a Service with Amazon.

Read the rest of this entry »

Android Samsung Nexus S: Short Review

Posted July 10th @ 11:21 pm by Boyan Tsolov

Android Samsung Nexus S

Android Samsung Nexus S

I’ve been neglecting the blog for a while.. sorry RSS subscribers.

I bought the HTC Magic 2 years ago when it first came out in Canada. That’s why most of my blog posts about Android development are from 2 years ago :).

I decided it was time to get the latest and greatest Android phone in Canada: the NEXUS S. A friend currently working at Google on Android highly recommended the device. And the fact that the phone is unlocked, Rogers will not put its apps on it, and Google will push updates directly to the phone without Rogers mandating when, made it even easier to pay the $300. In Canada the phone currently sells for $99 on a brand new contract, but you know how North America works: if you already have a contract you are not as enticing to the carriers as a brand new client with no contract. So, I had to pay a few fees to get the phone for $300 instead of $100.

I won’t go into a full review of the phone. There are plenty of sites that review the phone and have been doing it since the beginning of the year. I will only review a couple of items that I was worried about and you might be too if you are looking at getting this phone (or just got it).

Read the rest of this entry »

Windows Phone 7: Beginner’s Guide to Developing on Windows Phone 7

Posted September 26th @ 4:05 pm by Boyan Tsolov


The official release date for Windows Phone 7 is October 11th (in the US). Word around the internet is that it will be released in Canada around the end of October / beginning of November. LG, Samsung, HTC, and Dell have all developed handsets that will be available in Canada. One of the services we offer at my place of employment is mobile development and since we are a Microsoft Gold Partner, developing on Windows Phone 7 is our forte (actually it’s the only mobile development we do). I assume as this platform gets bigger more people will jump to learn how to program on it, so this is a quick-and-dirty list of resources that will help you to learn about programming on Windows Phone 7.

    If you are a developer, the first thing you need to do is visit the developer’s home page. You can download tools from here, read about the SDK, look at sample code, and get questions answered in the forums.
    You must download the Silverlight Toolkit for Windows Phone 7. It has alot of great Silverlight controls that will make your app much cooler. For example, the version of the SDK and Silverlight that you get from the first link does not have a calendar control. The Toolkit from this link has a DatePicker and a TimePicker control that you can just plop on your page and use.
    The best place I have found for guides, best practices, code samples, etc was Channel9. This is the home page.
    I particularly like the home page for Silverlight on WP7. There are a ton of tutorials here, the ones I found most useful are listed below.
    How to handle navigation, going back and forth between pages, the best practices for setting up your pages.
    Very important read on the application life cycle of a WP7 app.
    Working with launchers and choosers. Launchers and choosers are parts ofthe API that allow you interact with the Windows Phone 7 first-partyapps, such as the email client, calendar/agenda, contact list, messaging app, etc.
    This tutorial shows you how to make your apps have the cool Windows Phone 7 feel with the sliding between screens (called pivot and panorama controls).
    Great tutorial video on how to set up the application bar at the bottom of your app. The video also shows the different customizations that you can do to the application bar.
    Getting the cool fade-in, fade-out page transitions to work. This effect is done by using the TransitioningContentControl that comes with the Silverlight toolkit (an extra install from link #2). Note: this tutorial was done on the April release of the Windows Phone 7 SDK, the latest SDK is slightly different.
  11. Read the rest of this entry »

Samsung may drop Windows Mobile and switch to Android

Posted November 10th @ 11:36 pm by Boyan Tsolov

I just found this article from reddit…
Samsung may drop Windows Mobile for Android

Apparently Samsung is going to stop using Windows Mobile on its cellphones and will concentrate on Android!! I have been a supporter of Android since its inception and stories like these bring tears of joy to my eyes.

Oh, and there’s something about Samsung rolling out their own open source OS called “Bada”. Good for them.

Android: Simplified source code for parsing and working with XML data and web services in Android

Posted July 19th @ 10:05 pm by Boyan Tsolov

In my previous post I linked to a terrific website (Working with XML on Android) which describes how you can read and parse XML documents in Android. The code supplied by that website used polymorphism to show 4 different methods for parsing the XML data. I vowed to simplify that and share the new source code.

To download the AndroidXmlSimple project click here. You will be taken to another page where you can click to download to the ZIP file.

Below are some instructions on setting yourself up with this source code and customizing it for your own XML data.

Read the rest of this entry »




  • homemade naughty girls on video
  • anime kimono pussy
  • free full reality sex movis
  • redtube girls with tight ass
  • young italian teen girl video
  • Finnish girls porn
  • cute young ass
  • ebony amature video
  • Nude recreation photos
  • shemale pornstar angel blonde
  • indian girls free pics
  • book of naked black girls
  • free young xxx megs
  • Sex and boobs
  • white wife fucking blacks
  • asian mast movie
  • free stressed sex videos
  • dolly and sloan tits movies
  • pussy underwear sex young legal bbs
  • movie porn s m
  • cute tight black ass
  • free chicks with dicks photos
  • nudist young girls breasts pics
  • free vids of cumshots on clothes
  • black teens nude
  • girls surprising man xxx
  • free sex picsfree porn sex pics
  • hq naked girls hairy backs
  • horny teen girl tube
  • free blowjob cum porn vids
  • small teen lesbian
  • waterproof womans jacket petite size
  • pussy in tucson
  • black churches in youngstown ohio
  • slave eating pussy tubes
  • party at kitty s porn
  • Cindy margolis nude pictures
  • free extreme hardcore sex movies
  • Grandpa fucking teens
  • long porn movies videos
  • brazil retro porn videos
  • little cute teen pussy
  • free young nude girls giving handjobs
  • naked pics jiri tlusty
  • australian girls fuck for money
  • guys sucking girls tits
  • asian models porn
  • party sex greedy
  • fuck school girl squirt
  • lick my teen pussy
  • humans having sex with s videos
  • gy teen movies
  • Naked model photo
  • katie cassidie sex scene video
  • young pussy panties
  • ugly girls like to fuck too
  • tight teen naked in hd
  • lly allen pussy
  • Naked ladyboy pics
  • lottle teen video
  • live sex boobs
  • Jordan capri naked videos
  • max hardcore full videos free
  • daily nude wife movies
  • amature interacial teen sex
  • sexy devil girl cartoons
  • young naked asain girls
  • drew barrymore porn movie
  • indian sex gallery video
  • pregnant girls fingering g
  • hot lesbian pornstar galleries
  • sharon stone topless pictures
  • sexy teens mature
  • xxx young pron
  • pussy eaters porn
  • Black girls looking for sex
  • silay city pussy
  • woman pulling nipples free pictures
  • thai suck movie
  • sex girl deeply seduced porn video
  • pornstar trinity hardcore
  • on daughter fuck video
  • college boobs home video amateur
  • new age japanese girls
  • pic of party drunk girls
  • girls houston texas
  • black big ass fucking
  • emma stone pussy photos
  • post wife amateur
  • introduce sex to girlfriend
  • free young squirting movies
  • Sexy asian girls bikini
  • white guys black girls
  • free moms fuck girls videos
  • hot amateur high school pics
  • Bunny teens hot
  • black teen group sex
  • Teenager sex picture
  • group sex movie thumbs
  • homosexual jewish teen web site nyc
  • white women butt pictures
  • sexy skinny girls in bikinis
  • sex beautiful girl
  • beach threesome sex
  • air hostess anal xxx
  • girls flashing on the streets
  • Biker girls naked
  • black pageant girls
  • tori black and amateur
  • hsv facial lesion pictures
  • shemale pictures blow jobs
  • young small tits
  • Sexy teen porn for free
  • mature women masturbation voyeur video
  • Man sex girls
  • big floppy boobs free vids
  • japan asian model of capitalist development
  • top porn gallery
  • two teen girls fuck piano teacher
  • man your virgin pussy cock terri
  • free teen lesbo videos
  • blonds free hardcore porno
  • free creampie porn video
  • asian fuck wife
  • Naughty sexy girls
  • amateur video of woman feeding man
  • subtlety sexy mature free pics
  • american pie naked mile naked pics
  • asian pussy gallery
  • blacks in teens
  • sexy pics of reality stars
  • mature rides cock videos
  • xxx girls with toys
  • milf dreamnet anal sex
  • black and white tle pics
  • naked girl slo
  • interracial sex pic free web sites
  • drunk bikini boat sex
  • adult threesome pics
  • phat ass latina girl
  • Hot ass ebony
  • free gang bang porn
  • good hard core porn movies
  • petite nude boys
  • black porn video post
  • handjob spectacles girl
  • Swedish teen pussy
  • shemale jamie vids
  • Naked tattoo girl
  • index wow sex video
  • teen girls big lips
  • pantera pictures black and whirte
  • sweetest shaved pussy
  • massive squirting orgasm movies
  • high school girls breasts
  • silver galleries sex cartonns
  • hot young model milfs vids xxx
  • see naked pussy
  • teen pussy unwilling
  • sexy teen in pool
  • Exploited teens sex
  • cash back movie sex scene
  • she shows pussy
  • petit teen sex vids
  • avrage young pussy
  • free latina anal pussy
  • venture brothers dr girlfriend porn
  • blowjob girl ellie kemper
  • lesbian couples pics
  • i fucked my neighbors young wife
  • swinger milf porn galleries
  • hermaphadite porn free videos
  • blonde teens video porn
  • erotic glory pussy hole stories
  • extra large pussy and dick
  • hairy muslim pussy
  • Girls next door nude gallery
  • young playing with ass
  • massive black cock anal
  • sweet teen asian movies
  • hot sexy masturbating fingering
  • sex videos amateur porn
  • Sleep nude teens
  • homemade threesome movies viedo
  • girl with a big dick
  • young sweet naked teen legal
  • sex video to get baby
  • bubble butts puffies teen xxx
  • casual teen sex porn tube
  • atk anal galleries
  • ebony teen tube site
  • small girls large nipples ffm
  • black white sex pics
  • grinding with a sexy girl
  • old tits video
  • Xxx sex xxx video
  • Sex and the city the movie samantha
  • bikini pictures of paris hilton
  • black tits fucked
  • hispanic teen girls nude
  • Redhead sex vid
  • discuss married sex about wife
  • internet sex video
  • free real black anal videos
  • How to kiss a girl for first time
  • free amateur women sex picture
  • ass to mouth galleries
  • big tits cumshot movies
  • wife first threesome pic
  • free pic sex teens
  • ffrree porn video trailers
  • girls periods pictures
  • dirty pussy bitch
  • young gymnast girls models
  • little blonde porn
  • black beauty bbw
  • tsunade and sakura sex pics
  • free transexual orgy porn videos
  • Hot lady nude
  • girl on top sex porn
  • younger brother handjob
  • any mma girls that does porn
  • black pregnant and banged pics
  • upskirt voyeur beach ass pussy
  • perfect brown pussy
  • cum in jamaican pussy
  • amateur voyer porn
  • lesbians dildo fuck
  • latin hottie vida ass free galleries
  • Naked petite teens
  • naked woman batgirl
  • do girls like shaved
  • girl descripe fiest interracial fuck
  • petite stretch cap wigs
  • amateur teen on webcam strip
  • movie download free anal
  • sexy sluts fucked hardcore
  • threesome free porn tube
  • the theory of beauty movie
  • next door naked swimming videos
  • cooege sex party
  • mature wife bareback pics
  • very young arab porn
  • czech girls nude party
  • blow job oral sex how to
  • free voyeur pussy pictures
  • adult videos lots of cumshots
  • ebony anal masterbation
  • drunk girl sleep fuck
  • mature knickers pictures thumbnails
  • big boobs black babes vids
  • school girls experimenting video
  • sexy lesbian feet and tits
  • naked uk housewives
  • mature women two black dicks
  • xxx hot porn sex fucking vedio
  • thumbnail pictures mature legs in stockings
  • free blac on white sex pics
  • Perfect boobs videos
  • winter haven lake bikini pictures
  • celeb shaved pussy
  • girls suck dick at party
  • x amateur home adult video
  • blue eye ebony porno twins
  • young girls sharing one cock
  • wicked picture fuck torrent
  • japenese lesbian sex
  • teen video on demand
  • oral while driving videos
  • Breast feeding with big boobs
  • pornstar bachelor party
  • girl gives oiley handjob
  • mom and daughter fuck boyfriend video
  • young pussy felching
  • sex video asian teens
  • black and decker video boroscope
  • party girls masturbating video
  • video wife and her girlfriend
  • asian slums porn
  • girl next store porn star
  • free black orgasm videos
  • cuckold pics wife
  • free amateur porn japanese
  • mature pussy labia
  • wife summited sex movie
  • Sex young people
  • asian gaping pussy teen
  • las vegas topless show girl photos
  • lesbian fuck pic
  • naked black girls photos
  • sex wight girl urop free movies
  • asian girl fucked by father
  • blonde shemale pornstar
  • budweiser can with pussy
  • free pig tail porn pics
  • busty petite brunette fucks
  • funny cartoon porn video
  • black pussy and white dick
  • sex big booty black
  • flashing teens free
  • white wives cuckold black cock
  • cumshot on hairy pussy compilation
  • Vanessa hudgens ass naked
  • sex with japanese too tight
  • Hot sex pic
  • pussy girl cheerleader video
  • vibrator threesome porn
  • find girlfiend naked pics
  • alana moore black porn star
  • black young hairy women
  • Big bouncy boobs video
  • my naked sex slave
  • free teen sock movies
  • anouk pascale topless pics
  • straight manly muscular naked stud pictures
  • free real home sex videos
  • mature lesbian breast sucking top
  • different oral sex
  • story erotic touch girl dreamon
  • lita ford black blonde highlights
  • free xxx ebony pron hub
  • Double d breast pics
  • big nipples and hairy pussy
  • long teen brutal movies
  • women make men suck cock videos
  • Playmates nude pictures
  • cumshot big dick closeup
  • young nude chicks free
  • young moms sex video
  • suck cum anal boob
  • free school girl sex scenes
  • free young teen orgasm
  • black big tits tube
  • cute high school pussy
  • girls gone wild beach party
  • girls big boobs pressing video
  • free asian sex vid
  • black chicks who suck white cock
  • lessons sex mature
  • Naked pizza video
  • young teens boobs voyeurism
  • young hot big boobed teen porn
  • carla bruni naked pictures
  • undressing porn pictures chubby bbw
  • the movie black panthers
  • porn star homemade video
  • shauna sand sex tape pussy pictures
  • natural tit mom fuck videos
  • teen panties ppics
  • Brother sister sex pics
  • asian biker lesbian
  • nonnude pussy shots
  • kimono girl sex
  • black ebony free gallery
  • wife full video
  • hillary scott lesbian threesome
  • hot christmas babes partying
  • high school butt crack pictures
  • Black hairy vagina
  • girls beauty pearls
  • milf and teen galleries
  • bald black pussy closeup
  • chubby girl with small tits
  • Big tit thumbs
  • Telugu tv maa tv actress swathi showing breast indian sex
  • free hairy slut pussy
  • Malayalam sex video
  • xxx free movie tube young teen
  • older women and younger guys sex
  • sexy black actors
  • petite ebony sex
  • macbeth movie sex
  • stream asian videos
  • old black and white porn
  • lesbian bad girls
  • young sluts worlds biggest breasts
  • old couples porn galleries
  • anal discipline videos
  • swingers wife charlene
  • teen girls materbating
  • sexual story fuck
  • sex arabian girl video
  • sex boob dickless pee
  • youngest girl to ever get pregnant
  • sex club holland couples
  • milf threesome with strapon video
  • girls loves big dicks
  • Nude pics of emily deschanel
  • girls inflating videos
  • free lesbian sex teen video
  • photos topless girls
  • sexy busty blonde pornstar getting pounded
  • sexyand busty girls videos
  • glamour nude you porn
  • Asian lesbian girl
  • free mature womens galleries
  • free fat black granny porn pics
  • who has the biggest pussy
  • amatour sex videos anal young old
  • Naked golf girls