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• Huge or minimal performance hit running game servers on a Virtual Machine? [closed]

  - by Damainman

  I have a two dedicated servers to choose from depending on which one would do a better job. I plan on updating the Hard Drive space and RAM at a later date depending on how I move forward. Server 1: 500GB Hard Drive 8GB RAM 2x 64bit Intel Xeon L5420(Quad Core) @ 2.50Ghz Server2: 500GB Hard Drive 8GB RAM 2x 64bit Intel Xeon E5420(Quad Core) @ 2.50GHz I want to run a virtual machine that will host about 10 game servers, with about 16 active slots per server. It will be a mix and match from: Minecraft Counter Strike( 1.6, Source, Global Offensive) Battlefield Team Fortress I know the general consensus is virtualization is a horrible idea if you plan on running virtual servers on them. The issue is, the discussions I read do not really clearly state whether they are speaking about a virtual server running inside an OS(ie: VMware Player running on Windows with the game server in a VM) or a Hypervisor such as Xen Cloud Platform. I am trying to get a definite answer on how feasible the above would be and how much of a performance hit it might be if the VM running the game servers is on a hypervisor such as Xen Cloud Platform. My initial research lead me to believe that there wouldn't be a performance hit since the virtualization is different than running it via inside of a OS.

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• Run command remotely on Windows computer

  - by Bilal Aslam

  I have a Windows Server 2008 instance on Amazon EC2 (Amazon's cloud compute platform, which provides VMs in the cloud). It has an external IP, and I have an admin account on the box. I would like to 'bootstrap' this instance remotely i.e. I want to run commands to download, install and configure apps on it, all without having to log on even once. Also, I cannot use psexec on the source computer. I have figured out how to do this to a remote, domain-joined computer using WMI. However, I have NOT been able to do for a remote computer on EC2. Here are some specific restrictions: The remote computer is not part of my domain, hence no Kerberos The remote computer does not have a cert I trust, or vice versa I am sure I am running into to some auth/trust restriction. Is there any way I can run a single command on the remote, given that I have admin privileges? I'm not tied down to using WMI, but I do need to run a command somehow. Feels like this should be a solved problem.

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• Web hosting for multiple web sites providing system isolation

  - by Justin

  We have a small number of projects where we expect the client will not be maintaining the installed versions of applications we install to power the site (such as Drupal). Given that an important part of security is keeping things updated, we don't want to host these projects on our Plesk-powered dedicated servers that currently host lots of our other client's websites. Our goal is to find a host where we can deploy isolated instances (be these slices, virtual servers, grid servers, etc) for each individual (or groups of 2-3) web sites as we need them. These instances would be completely separate, so that if one web site were hacked it would not impact any other site. Typical hosting requirements: Linux Apache PHP 5 MySQL Supports Drupal Ability to setup a cron task (but we don't need SSH access) Daily backups Virtualized/cloud hosting (we want to avoid shared) Pricing per site is around $25/month OS is patched automatically Some options we have considered but won't work: MediaTemple: Two major data center-wide security incidents and recent downtime foster doubt about this host's technical ability. Slicehost: This would require us to manage the entire server, which we don't want to do. Rackspace Cloud Sites (formerly Mosso): No backup options. Do you have any recommended hosting options for given these requirements?

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• Incorrect deployment of WSGI app to AWS using Elastic Beanstalk

  - by Dzmitry Zhaleznichenka

  cross-link to AWS forums I have developed a simple Python web service using WSGI and would like to deploy it to AWS cloud using Elastic Beanstalk. My problem is I cannot make all the options I specify in Elastic Beanstalk configuration to be correctly configured in the cloud. For deployment, I use Elastic Beanstalk CLI utility. I have run eb init command and set up the required parameters. After this, a directory named .elasticbeanstalk was created in my source tree. It has two config files that are used for deployment, namely config and optionsettings. The latter one among the other options contains the WSGI configuration that has to update /etc/httpd/conf.d/wsgi.conf at the instances. After some of my adjustments the file has the following settings: [aws:elasticbeanstalk:application:environment] DJANGO_SETTINGS_MODULE = PARAM1 = PARAM2 = PARAM4 = PARAM3 = PARAM5 = [aws:elasticbeanstalk:container:python] WSGIPath = handler.py NumProcesses = 2 StaticFiles = /static= NumThreads = 10 [aws:elasticbeanstalk:container:python:staticfiles] /static = static/ [aws:elasticbeanstalk:hostmanager] LogPublicationControl = false [aws:autoscaling:launchconfiguration] InstanceType = t1.micro EC2KeyName = zmicier-aws [aws:elasticbeanstalk:application] Application Healthcheck URL = [aws:autoscaling:asg] MaxSize = 10 MinSize = 1 Custom Availability Zones = [aws:elasticbeanstalk:monitoring] Automatically Terminate Unhealthy Instances = true [aws:elasticbeanstalk:sns:topics] Notification Endpoint = Notification Protocol = email It turns out that not all of these options are considered when I start the environment or update it. Thus, when I update NumThreads or NumProcesses, the respective parameters get changed in wsgi.conf as expected. But whatever I write to the WSGIPath and StaticFiles parameters, I'm not able to automatically change the respective values of wsgi.conf, they remain Alias /static /opt/python/current/app/ WSGIScriptAlias / /opt/python/current/app/application.py which drives me nuts. Moreover, when I deploy my application using git aws.push and having the following contents of .ebextensions/python.config file, neither of options I specify in it affects the deployment. option_settings: - namespace: aws:elasticbeanstalk:container:python option_name: WSGIPath value: mysite/wsgi.py - namespace: aws:elasticbeanstalk:container:python option_name: NumProcesses value: 5 - namespace: aws:elasticbeanstalk:container:python option_name: NumThreads value: 25 - namespace: aws:elasticbeanstalk:container:python:staticfiles option_name: /static/ value: app/static/ I wonder what I should do to force AWS use all the parameters I specify in the configuration, namely the WSGI Path and path to my static data.

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• Hosting websites in our Workplace custom-built datacentre

  - by i.h4d35

  I'm faced with unique learning opportunity at work at the moment. Due to the slowdown (amongst other reasons), the powers that be at my office have decided to abandon our shared hosting providers (both shared and dedicated hosting) and have decided to host the websites at our office's datacentre. We're running 7 websites, wherein the average unique hits per day at the moment is about 900. We have 2 servers set aside for this - one is a DELL POWER EDGE 1850 (Intel Xeon 3 GHZ*2, 4GB RAM, 73GB HDD and the other is an HP DL 380 G3 (Intel Xeon 2.8 GHz, 6 GB RAM, 73 GB HDD) a) I would like to know the pros and cons of going ahead with this project.All the sites will be hosted on a single IP. In all probability, the OS is going to be CentOS. b) Do you think I should consider Virtualization into this equation (KVM/Xen)? I was thinking in terms of separate instances of the DB server and the frontend though I do not know if this is the best way to go. c) Should I be trying to use cloud stacks like OpenStack and try to make it look like websites hosted on some sort of Public Cloud? (something that I checked out here). Here is something else I came across, which looks similar to what needs to be done at our office. About the websites - Of the 7 websites, 4 are basic static websites which basically gives a whole lot of information about a few local institutions. The remaining 3 are local product-based websites developed in PHP wherein end user can view products and order them online. I am trying to take this as a learning experience wherein I can learn to build something from scratch and save the company a little something in the process. The migration needs to be completed by Easter so I guess it gives us some time (or am I being overly optimistic??). I am confused here and would appreciate all the help I can get. Thanks in advance.

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• ubiquity automatic install stops at keyboard layout chooser

  - by badgerhill

  i am trying to automate an ubuntu (12.04.1 64bit) installation using ubiquity & preseed on a desktop live cd. it almost works fine. i edited the txt.cfg and added label unattended menu label ^Unattended installation kernel /casper/vmlinuz append file=/cdrom/preseed/custom.seed boot=casper initrd=/casper/initrd.lz quiet splash noprompt -- this is my custom.seed file the problem is that, the installer shows the keyboard layout chooser and i have to click next. the correct language & keyboard layout (german) are already preselected. what am i missing, or what's wrong in my custom.seed file, to automate the next click? thomas

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• Run command remotely on Windows computer from C#

  - by Bilal Aslam

  I have a Windows Server 2008 instance on Amazon EC2 (Amazon's cloud compute platform, which provides VMs in the cloud). It has an external IP, and I have an admin account on the box. I would like to 'bootstrap' this instance remotely i.e. I want to run commands to download, install and configure apps on it, all without having to log on even once. Also, I cannot use psexec on the source computer. I have figured out how to do this to a remote, domain-joined computer using WMI. However, I have NOT been able to do for a remote computer on EC2. Here are some specific restrictions: 1) The remote computer is not part of my domain, hence no Kerberos 2) The remote computer does not have a cert I trust, or vice versa I am sure I am running into to some auth/trust restriction. Is there any way I can run a single command on the remote, given that I have admin privileges? I'm not tied down to using WMI, but I do need to run a command somehow. Feels like this should be a solved problem.

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• internet-based sync software that will keep running after Windows Live Sync stops doing PC-to-PC-syncs?

  - by Warren P

  According to the wikipedia page, Microsoft Live Sync will shortly stop offering the PC-to-PC sync service. There are lots of apps to sync two PCs on the same LAN, but I want to sync two PCs that are in different cities, across the internet, traversing two different NATs, and that requires some kind of service running in the internet that both connect into. There is already a few questions about syncing folders and files, but this is not a duplicate because none of them answer this basic question: Microsoft Live Sync works better than RSYNC, or any of the linked SYNC solutions in any of the "not really duplicates" because it works even when the two PCs have NAT and firewalls between them that forbid direct connectivity, because Windows Live Sync has a free always-on internet server that all the client PCs connect into. I'm looking for a FREE (no-fees) Microsoft Live Sync work-alike PC-to-PC sync solution that works between PCs and Macs, at least, as well as between PCs, and works behind NAT and firewalls at least as well as Microsoft's solution. (Note that Microsoft's solution makes only outbound socket calls to a microsoft server, so this solution must necessarily include a server-hub component that is hosted publically on a free site and which does not require that I set up and manage and pay for my own public internet hosting site) Hint: None of the answers in the linked duplicate are equivalent (PureSync,FreeFileSync,BestSync 2010,SyncButler,Comodo BackUp,QuickShadow,Gbridge) in that none of them work for the PC to Mac situation, where firewalls and nats prevent direct connection, or else they require money to be paid. When Microsoft Live Sync / Live Mesh finally kills direct PC-to-PC mode, the limitation will be that you will have to pay for more than 25 GB of cloud service, and you can then only sync PC #1 to PC #2 if you first sync to the cloud, then down to other clients. I can currently sync 100 gb of data from one computer to another, only temporarily "moving the data" through Microsoft's data servers without using up my Skydrive storage quota.

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• How to move Mdadm RAID drive (EBS based) to different AWS Instance

  - by Stanley

  We have a media-rich web application that is hosted on AWS. We have several Web Servers and we have an NFS server. On the NFS server (Linux server) we have several EBS volumes that are mounted and we've used mdadm to implement the different mounted volumes as a single RAID volume. The Web Servers simply access the NFS storage through a mount point. Amazon has now let us know that they will be performing power maintenance on this server in a couple of days time. Since all our media is on here it would render our site unusable for the hours while Amazon is working on it. We want to try and prevent this downtime. I was thinking that we can prevent server downtime by perhaps setting up a new server temporarily and attaching the EBS drives (raid volume) to that server and have our web servers point there during maintenance. This is a very high risk operation since this involves several terabytes of our production data. What would be the safe way to move over our logical raid drive (md0) to a new amazon instance? I was hoping that I could start with building the new server, mounting the ebs volumes and assembling the RAID partition using mdadm --assemble --scan before unmounting from the existing instance so that I can first test that everything works and thus having it mounted on two instances at the same time, but I don't believe that is possible with the way that filesystems work. How do I move a Linux software RAID to a new machine? suggests a way to move drives, but isn't really a cloud-based question. Perhaps there are simpler ways to prevent system downtime with our solution being hosted on the cloud? I have considered taking an EBS snapshot, but that tries to replicate all the many terabytes of mounted storage, so this is not a practical solution. Any ideas?

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• Vagrant doesn't detect chef-solo unless re-installed

  - by nightowl

  I am using Vagrant to test my Chef recipes in Amazon AWS, and I am encountering an irritating issue: I initially assumed that Vagrant would install chef itself (as it does when using Virtual Box as the provider) but it seems that this needs to be done using the cloud-init script. However, even after I successfully installed the chef gem via cloud-init I was still getting the following error: The chef binary (eitherchef-soloorchef-client) was not found A quick google of this error suggested three probable causes: Chef had failed to install It had installed, but the directory was not in the $PATH environment variable It had installed and in the $PATH but with incorrect permissions I logged in and double checked; chef-solo and chef-client were installed; The path variable for the user, sudo and root all included /usr/local/bin and permissions were all fine. I managed to solve this problem by uninstalling and reinstalling the gem using sudo gem install chef. I don't understand why this should resolve the issue and it is a bit of a problem if I have to ssh into a test box and manually install the gem every time. Does anyone have any suggestions why this might be happening?

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• Windows 8 folder to folder sync software

  - by Danny

  I'm looking for direct folder to folder synchronization in Windows 8. I was previously using Live Mesh to accomplish this, but now it looks like that is no longer an option. Note that I'm talking about direct folder to folder sync between different computers, not syncing to the cloud. I'm aware of products like Google Drive, SkyDrive, Dropbox, etc. The problem with them is the space limitation. Basically, I was syncing important files before between my desktop and all of my laptops. One folder for example is My Pictures. This folder has almost 40 gigs of files, which is why the options listed above are not going to work for me. Just need direct syncing, nothing stored on the cloud. I was told by a Microsoft employee that SkyDrive would be replacing Mesh and would provide all the same functionality. So far this looks to be completely false, since the ability to remote desktop is gone along with folder to folder sync. Unless I'm just missing something?

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• XenServer VMs can't reach network

  - by toto

  I'm currently trying to setup a small cloud architecture , I'm using in the installation CloudStack 2.2.14 which need two node : a management server (as node1) to provision the cloud and a hyperviser XenServer 5.6 SP2 to host the VMs (as node2). I succeded to create both node1 and node2 into an ESXi 5 VMWare as VMs. So The ESXi 5 is hosting two VMs node1 + node2 , and node2 which is the XenServer will host also VMs (such as ubuntu or Centos). Both node1 and node2 can ping each other and can get the internet connection from Esxi5 ,but My problem is : that VMs into the node2(XenServer) can't reach the network (can't ping node1 or Esxi or get an internet connection but they can ping VMs IN the node2(XenServer). So I tried to: 1-Setup a DHCP server as node3 in ESXi5 and connect node2(Xenserver) to him , but always the VMs into to node2 can't reach the outer network. 2-Setup a DCHP server into node2 , but always the same problem. So , 1-is there any other configuration i'm missing in node2 (considering that I'm sure about DNS , GW , NETMASK configuration)?. 2-Is it the problem because i'm Creating VMs into node2(XenSever) which is a VM into ESXi 5 ?

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• How to make the ec2 ami work on the Xen on Debian

  - by user67103

  Hi. Here is the scenario. We are creating a cloud App. We have a Debian on which we create a customized image and upload it to the Amazon EC2. After uploading it to the cloud we have made some more customizations and are trying to rebundle it. We are facing some issues in rebundling it. We would like to know if we could do something like this. a. Create an AMI Image on Debian b. Load it on to the Xen Hypervisor which would be over the Debian c. Customize the image d. Save the customized image e. Upload it to EC2. The issue is that I am unable to find a proper solution on how to install Xen on Debian and will the AMI on Xen work on EC2. Any suggestions/Help would be greatly appreciated. thanks. Krishna

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• Invoke host's workspace switcher from inside VM

  - by Paul

  When I start a virtual machine (like VMware or VirtualBox) and set it full screen then, from the host OS (in this case Ubuntu), I can beautifully switch to it with the Workspace Switcher. So I switch to the VM like I switch to a virtual screen. But switching back -- from the VM to the host's virtual screens -- seems to be impossible because by entering the VM I loose the host's workspace switcher. Is there a nifty workspace switcher program that runs inside the VM and is able to switch workspaces of the host machine? Edit in light of Frank Thomas' answer, can we configure VirtualBox (or VMware) to not send certain key combinations to the VM, but keep them to the host? Like Super+S. In that approach I would sadly have to miss the nice workspace switcher icon in the guest OS, but that's OK if at least the keyboard trick would work.

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• Device CAL, User Cal or Processor license needed for SQL 2008 (architecture explained inside)?

  - by nycgags

  So we have a number of servers in the Amazon cloud running SQL Server Standard edition to aggregate data. For that purpose we are fine, the licensing is handled by our contract with Amazon, no problem there. For the beefier work, we want to install Enterprise Edition (EE) on our servers processing raw data so that we can take advantage of table partitioning. We currently have 3 servers aggregating data from about 40 node servers, all 43 of these servers are running standard edition which is fine. We also have 4 servers running standard processing the raw data, but I think we can get away with 2 (for redundancy) running Enterprise Edition. We have 2-3 dba's that access these DW servers for maintenance (using the same windows login via remote desktop). So visually: 40 -- 3 -- [2] -- 2 -- 1 nodes -- aggregators -- raw (which we want to run EE) -- calculators -- datawarehouse Nodes PUSH to aggregators, Raws PULL from aggregators, Calculators PULL from Raw, Calculators PUSH to datwarehouse I am specifying the push vs. pull in case that changes how the # of licenses is calculated. Q1) how many device (or user) CAL's do we need? Q2) do I need to speak with someone from MSFT to find out if it is ok to install in the Amazon Cloud (Amazon said we need to verify it is ok in our license terms)? Q3) what happens if another device tries to access a server with the limited number of device CAL's? Q4) Are the device CAL's simultaneous number of devices or total? Q5) Do Device and User CAL's cost the same or is there a difference? Q6) Would we need to buy a processor license (we are hoping not to)?

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• Software to watch movies at the same time and chat

  - by Thomaschaaf

  Hello! Sometimes I want to watch a movie with friends... them not always being near me makes it hard to do this. Usually everyone will either rent the dvd or get a copy online mostly as .avi files. Usually we all have chat windows open and when one has to pause to get a drink or because of some other reason it is VERY hard to resync. Is there software to handle this? The file could be hosted on linux machines in the cloud if that would be any help :) Greetings, Thomas

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• email attachments [closed]

  - by Alan Doolan

  My company currently use software on a local machine that will take an email from the email server, extract the attachment, rename it and then add it to a folder on a webserver using ftp. This works well but they are currently asking if it can be done 'in the cloud' or what they really mean, not local. Is there any thing that would do this on the server itself? I should clarify a bit. The attachements are various reports that are being sent to different email addresses (mostly google corporate and free accounts). We need the reports to be on a folder on a webserver so that internal pages can take the information in the reports (csv) and use it on the webpages or adds them to a separate database. The key part being that the files need to be in the particular folders. Though it does work to have a computer running software that will take the files, renames them to the required name and uploads them to the folder it relies too heavily on one computer working all the time. This is not something we can depend on at this point. I'll be honest, I'm a web developer and not strong with server systems past my particular standard requirements so this is beyond me. though yes, I am aware that my boss is not 100% sure what 'cloud' means but likes the word.

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• Autossh startup on Ubuntu 10.04 - fails after powering off

  - by grant

  I'm using upstart to keep a reverse ssh tunnel alive using auto ssh similar to Using Upstart to Manage AutoSSH Reverse Tunnel. This works fine, except after a manual power down I can no longer connect to the machine through the "central server" using the tunnel. I receive "ssh_exchange_identification: Connection closed by remote host". The autossh process is running on the client. I can connect again after re-starting networking. I'm trying to figure out why this is failing consistently after a manual shutdown. Is it possible that I need to do some cleanup on startup that would allow the tunnel to work in this situation, or are there some other debugging/troubleshooting steps I can take to determine the problem? Machine A is the client machine, using autossh. This machine sits behind a firewall and uses the following command in upstart to create an ssh tunnel: /usr/bin/autossh -fN -i /keyfile -o StrictHostKeyChecking=no -R 20098:localhost:22 user@centralserver Machine B we'll call the "central server", which sits in the cloud and is the host. This machine is "centralserver" in the command above. When Machine A is hard powered off, and back on, I cannot connect to it by SSH'ing from my machine (C) to Machine B in the cloud, then using the following command to get to Machine A: ssh -p 2098 user@localhost Again, after a reboot of the client (A), this works fine. It is only after a hard power down that the problem occurs. There are autossh processes that are running on the client machine (A) after powering down and back up, but they just don't seem to doing their job.

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• What other ways can I load balance EC2 servers without using Elastic Load Balancing?

  - by undefined

  I have a web application that consists of a web server managed by a web hosting firm, a set of EC2 instances in amazons cloud and a MySQL database (hosted on the webserver). MySQL is behind a firewall and is set to allow access from Localhost and from a single IP address which is an Amazon Elastic IP address that is attached to the EC2 instance I have been running up to now. The problem is that I want to look at my scaling up and load balancing strategy for my EC2 instance. To this end I have been investigating the Elastic Load Balancers and Autoscaling tools that Amazon provides and have managed to set this up fine but for one thing - connecting to the MySQL database running on my webserver. I realised (thanks to answers on Serverfault) that I needed to check firewall settings and add the IP address for the load balancer, however Elastic Load Balancers provide you with a DNS name, not an IP address and infact the IP addresses change over time so this will not work. I have been told by the company hosting the database that the way the firewall works is to look up the IP address of the DNS name and store the IP rather than the DNS name. so basically this will not work and the only way to allow access would be to open up the SQL port to allow access from anyone! Is this a viable idea? Should I look at moving my database into the cloud? Is there another firewall that the server company can use? Should I find another way of load balancing (if so what?) tricky one eh? any help appreciated!

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• Is there anything like Heroku for PHP and/or .NET?

  - by Wayne M

  In my area PHP is very widespread, so is .NET. Ruby not so much; most places have never heard of it. For some personal things I am "forced" to choose Rails because I want to take advantage of Heroku - the ability to deploy and scale on the cloud very easily is the main reason. Also, they offer a small FREE plan, with no ads or strings attached, that I can use for demo sites or, in this case, for my business' static page; as a totally bootstrapped startup I have maybe $50 or so in initial capital and cannot afford to pay monthly fees while I'm getting started. Are there any similar offerings for other languages? Specifically, I really like the small, 5MB site for free that Heroku offers - is there anything like that for PHP and/or .NET? I'm not even that concerned about the "cloud" part, but that would be a nice bonus. If there is, I might be able to kill two birds with one stone and pick up a useful skill as I'm doing my own thing instead of using something that nobody else knows or cares about. I should add I'm specifically interested in something that offers a free plan. As I said, Heroku has a 5mb plan that you can have as many as you want for free; I have yet to find anything similar for any other platform (most of the "free" sites require you to have ugly banners on your page, or don't allow you to use your own domain name), and to be honest I'm not too thrilled about using Ruby on Rails for everything simply to take advantage of this. I'm asking this here because I already asked it on StackOverflow and someone suggested it would be better suited here.

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• Windows 8 / IIS 8 Concurrent Requests Limit

  - by OWScott

  IIS 8 on Windows Server 2012 doesn’t have any fixed concurrent request limit, apart from whatever limit would be reached when resources are maxed. However, the client version of IIS 8, which is on Windows 8, does have a concurrent connection request limitation to limit high traffic production uses on a client edition of Windows. Starting with IIS 7 (Windows Vista), the behavior changed from previous versions.  In previous client versions of IIS, excess requests would throw a 403.9 error message (Access Forbidden: Too many users are connected.).  Instead, Windows Vista, 7 and 8 queue excessive requests so that they will be handled gracefully, although there is a maximum number of requests that will be processed simultaneously. Thomas Deml provided a concurrent request chart for Windows Vista many years ago, but I have been unable to find an equivalent chart for Windows 8 so I asked Wade Hilmo from the IIS team what the limits are.  Since this is controlled not by the IIS team itself but rather from the Windows licensing team, he asked around and found the authoritative answer, which I’ll provide below. Windows 8 – IIS 8 Concurrent Requests Limit Windows 8 3 Windows 8 Professional 10 Windows RT N/A since IIS does not run on Windows RT Windows 7 – IIS 7.5 Concurrent Requests Limit Windows 7 Home Starter 1 Windows 7 Basic 1 Windows 7 Premium 3 Windows 7 Ultimate, Professional, Enterprise 10 Windows Vista – IIS 7 Concurrent Requests Limit Windows Vista Home Basic (IIS process activation and HTTP processing only) 3 Windows Vista Home Premium 3 Windows Vista Ultimate, Professional 10 Windows Server 2003, Windows Server 2008, Windows Server 2008 R2 and Windows Server 2012 allow an unlimited amount of simultaneously requests.

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• How to implement friction in a physics engine based on "Advanced Character Physics"

  - by paldepind

  I have implemented a physics engine based on the concepts in the classic text Advanced Character Physics by Thomas Jakobsen. Friction is only discussed very briefly in the article and Jakobsen himself notes how "other and better friction models than this could and should be implemented." Generally how could one implement a believable friction model on top of the concepts from the mentioned article? And how could the found friction be translated into rotation on a circle? I do not want this question to be about my specific implementation but about how to combine Jakobsens ideas with a great friction system more generally. But here is a live demo showing the current state of my engine which does not handle friction in any way: http://jsfiddle.net/Z7ECB/embedded/result/ Below is a picture showing and example on how collision detection could work in an engine based in the paper. In the Verlet integration the current and previous position is always stored. Based on these a new position is calculated. In every frame I calculate the distance between the circles and the lines. If this distance is less than a circles radius a collision has occurred and the circle is projected perpendicular out of the offending line according to the size of the overlap (offset on the picture). Velocity is implicit due to Verlet integration so changing position also changes the velocity. What I need to do know is to somehow determine the amount of friction on the circle and move it backwards parallel to the line in order to reduce its speed.

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• New Technical Articles on SOA, Mobile, IDM, WebLogic, Coherence

  - by OTN ArchBeat

  For your reading pleasure... In October the following items of techie goodness from members of the architect community were added to the ever-growing library of OTN technical articles. SOA in Real Life: Mobile Solutions by Jürgen Kress, Berthold Maier, Hajo Normann, Danilo Schmeidel, Guido Schmutz, Bernd Trops, Clemens Utschig-Utschig, Torsten Winterberg Consumers are no longer content to be chained to a desktop or laptop computer. This article, teh ninth chapter in the Industrial SOA series, describes ways companies can take SOA to go. [More SOA Articles] SOA and User Interfaces by Juergen Kress, Hajo Normann, Danilo Schmiedel, Guido Schmutz, Clemens Utschig-Utschig, Torsten Winterberg, and Bernd Trops The eighth chapter in the Industrial SOA series addresses the challenges of developing user interfaces in a service oriented architecture, and describes a practical application of Thomas Erl's UI Mediator pattern.[More SOA Articles] Enterprise Grade Deployment Considerations for Oracle Identity Manager AD Connector by Firdaus Fraz Oracle Fusion Middleware solution architect Firdaus Fraz illustrates provides best practice recommendations for setting up an enterprise deployment environment for the OIM connector for Microsoft Active Directory. [More Identity Management Articles] Coherence*Web: Sharing an httpSession Among Applications in Different Oracle WebLogic Clusters by Jordi Villena SOA solution architect Jordi Villena shows how easy it is to extend Coherence*Web to enable session sharing. [More SOA Articles] Multi-Factor Authentication in Oracle WebLogic by Shailesh K. Mishra Using multi-factor authentication to protect web applications deployed on Oracle WebLogic.[More Identity Management Articles] You'll find many more articles on many more topics here.

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• Get to Know a Candidate (10 of 25): Tom Stevens&ndash;Objectivist Party

  - by Brian Lanham

  DISCLAIMER: This is not a post about “Romney” or “Obama”. This is not a post for whom I am voting. Information sourced for Wikipedia. Stevens is an American professor, attorney, politician and blogger. He is the founder and chairman of the Objectivist Party and was that party's nominee for President in the 2008 and 2012 United States Presidential elections. He is the party's presidential nominee in the 2012 election as well. He is also the founder of the Personal Freedom Party of New York. Stevens was the first vice chairman of the political party Boston Tea Party. He resigned from that position in 2008. In 2010, he announced the formation of the Personal Freedom Party of New York. Stevens runs the blog site Liberty Lion. He is a graduate of New York University and Hofstra University School of Law. Stevens is on the ballot in CO, and FL. The Objectivist Party is a political party in the United States that seeks to promote Ayn Rand's philosophy of Objectivism in the political realm. The party was formed on February 2, 2008 by Thomas Stevens; the date was chosen to coincide with Rand's birthday. The party believes in the repeal of the federal income tax; thus the repeal of the 16th Amendment. The income tax would then be replaced by a Flat Tax of 10% or Federal sales tax. The party supports the 2nd Amendment, but only as long as violent criminals are not permitted to own any weapon. Learn more about Tom Stevens and Objectivist Party on Wikipedia.

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• Collaborate 2010 Recap: A lot of Excitement for Oracle Content Management 11g

  - by [email protected]

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} Collaborate brought me to Las Vegas last week and what a week it was.  Each day was jam packed with Oracle Content Management sessions, and almost every session I attended was full.  Across the 35+ sessions that were given by my Oracle peers, Oracle partners, and Oracle customers, the majority of the discussion and questions that were asked had to do with the release of Oracle Content Management 11g.  Just to bring everyone up-to-speed, the first wave of Oracle Content Management 11g releases happened this past January as Oracle Imaging & Process Management and Oracle Information Rights Management went GA.  The next wave, which should be released soon, includes Oracle Universal Content Management and Oracle Universal Records Management. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} Andy MacMillan and Roel Stalman kicked off these discussions last Monday, as they presented Oracle Content Management's product strategy and roadmap.  It seemed that the attendees liked what they heard regarding the strategy and future direction, but the question that seems to always come up after roadmap presentations is "when will the product be released"?  This is a question that none of us have the power to answer, but soon customers will be able to enjoy these new product capabilities: Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} Unified content repository across ECMCentralized installation, access, administration & monitoringCertified application integrations with solution templatesOpen Web Content Management Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} Stay tuned for more news about the release of Oracle Universal Content Management and Oracle Records Management.  There are a lot of new assets currently being built that will help get everyone up-to-speed quickly. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} Outside of the sessions that were presented, there were a lot of other activities that took place at Collaborate.  The Enterprise 2.0 solutions demo pod was busy, and attendees were anxious to see demonstrations of Oracle's end-to-end document imaging solution, WebCenter Spaces, and web site creation using Oracle Universal Content Management.   I also want to thank our partners (Fishbowl Solutions, Redstone Content Solutions, Bezzotech, Team Informatics, and DTI) for their efforts in creating detailed, insightful presentations.  Also, special thanks are in order to Thomas Feldmeier and Markus Neubauer of Silbury IT-Beratung GmbH for their participation.  It seems that Thomas and Markus were doomed to be stranded in Frankfurt after the Icelandic ash storm.  They couldn't get a flight out of their native Germany, and with fear that they would miss Collaborate, they rented a car and drove to Rome - some 800 miles (1,200 kilometers).  Anyway, they made it safe and sound to Las Vegas, and although probably a bit tired, they gave 2 Oracle Content Management presentations.  Talk about commitment. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} Finally, a very special thanks to Al Hoof and Dave Chaffee of the Oracle Content Management Special Interest Group (SIG).  Al and Dave did most of the heavy lifting for Collaborate, including the coordination of all the sessions.  The Independent Oracle Users Group presented Al with the Chris Wooldridge award, recognizing him as the volunteer of the year.  Here is Al with his award: Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} I hope to see you next year at Collaborate as the show returns to Orlando.

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