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  • How can one domain route to an always-changing pool of servers?

    - by ryeguy
    I'm sure this is an easy solution, I'm just not too familiar with how DNS works or if that's even related to this problem. If I'm running a web service on amazon ec2, distributed across many instances, how can I make it so a single domain name can be used to access the entire pool of servers, which will be changing from time to time? Since the instances may be present one second but gone the next (and vice versa), I need a way to randomly pick an active member of the cluster to route to. The updates would have to be instantaneous. Is this even possible, with dns caching and all?

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  • Is Tomcat Shared Session / Cluster between two machine possible?

    - by Snorri
    I have a setup of several Tomcat servers distributed between a few servers, all running the same thing. Apache is on top of Apache and a loadbalancer in front of the Apache servers. I want to cluster the Tomcats using Shared Session to minimize downtime and user interruption while deploying apps. I know clustering works within the same server but is it possible to setup Tomcat in a way that it shares sessions between servers on different machines? = Server 1 == Apache 1 === Tomcat 1 = Server 2 == Apache 2 === Tomcat 2 When Server/Tomcat 1 would be taken down, users and their sessions would transfer over to Server/Tomcat 2 and vice versa.

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  • Open Source App Stor

    - by Kortex786
    Hy Everyone, I want to manage a kind of private App Store. All users of my company can download apps or software from the Intranet. Here is a sample of what I want for a private use : http://www.01net.com/telecharger/ Does anyone know a open source service that can do that ? Thx.

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  • On Linux/Unix, does .tar.gz versus .zip matter?

    - by rwallace
    Cross-platform programs are sometimes distributed as .tar.gz for the Unix version and .zip for the Windows version. This makes sense when the contents of each must be different. If, however, the contents are going to be the same, it would be simpler to just have one download. Windows prefers .zip because that's the format it can handle out of the box. Does it matter on Unix? That is, I tried today unzipping a file on Ubuntu Linux, and it worked fine; is there any problem with this on any current Unix-like operating system, or is it okay to just provide a .zip file across the board?

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  • What is the best multiple monitors app for Windows 7?

    - by AndyMcKenna
    What is the best app for supporting multiple monitors in Windows 7? Ultra mon was perfect in Vista and XP but I don't think it works with Windows 7 yet. The main features I'm looking for are: Taskbar for each monitor with only the apps that are running there. This might not be doable based on how the Windows 7 taskbar works now. A button next to Minimize to send the window to the other monitor Separate wallpapers for each monitor

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  • On Linux/Unix, does .tar.gz versus .zip matter?

    - by rwallace
    Cross-platform programs are sometimes distributed as .tar.gz for the Unix version and .zip for the Windows version. This makes sense when the contents of each must be different. If, however, the contents are going to be the same, it would be simpler to just have one download. Windows prefers .zip because that's the format it can handle out of the box. Does it matter on Unix? That is, I tried today unzipping a file on Ubuntu Linux, and it worked fine; is there any problem with this on any current Unix-like operating system, or is it okay to just provide a .zip file across the board?

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  • using gmail as your email hosting provider?

    - by ajsie
    i've got a external domain and i want gmail to handle all the incoming emails. i know that its free for me to let gmail handle all the outgoing mails, since you can add your external domain in their settings. but how incoming mails? is it free or do i have to use their google apps for business?

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  • In-house Trusted Certificate

    - by MrEdmundo
    Hi there I'm a developer looking at introducing ClickOnce deployment for an internal .NET Winforms application that will be distributed via the corporate network. Now I would like to deploy this application under the full trust model however in order for that to happen I need to sign the software with a certificate. I can do that with a "test" certificate that has no information of the publisher etc, however that means an extra step will occur on the users workstation where they will have to confirm that the software is OK. So what I want to know is. is there a way I can get my IT Infrastructure guys to create me a an "internal" certificate from the domains Certificate Authority, or do I have to go and pay for a certificate from somebody like VeriSign? Thanks

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  • "Raid 0 SAS" versus "2nd generation SSD"

    - by Stefano
    Hi everybody, i was planning to buy a SAS system made of two 15k RPM disks in Raid 0 configuration to give a boost to my s.o. and my apps... but after i saw that article on Coding Horror, i've started to thinking if a new 2nd generation SSD could do the same job, or even better... Does anybody have any information to help me decide?

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  • On ubuntu 10.04, what is the recommended RoR stack?

    - by Kurucu
    I can't find clear answers / methods on this. As seen elsewhere, passenger and RoR under apache gobble up ram on my VPS. I've tried a multitude of stacks and implementations, currently resting on a sub optimal apache/cgi/rails configuration, which has swapped my ram usage for CPU time and slow response to requests. Can anyone recommend an efficient and preferably simple to administer method of setting up rails apps in ubuntu 10.04 server?

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  • What causes "system call failed" and there are hanging ie processes?

    - by TecBrat
    System: Windows 7 Home Premium IE: 11.0.9600.17107 When I have had many, many apps and windows open, sometimes I'll try to access a folder and get a dialog that says "System Call Failed". I have found the fix for it is to open the task manager and End Process Tree on iexplore.exe and iexplore.exe *32. Often times there will be several of these even when I have closed all my browser windows. Does anyone have any experience with this error?

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  • Equalizing Agent and Master Nagios on state change alone

    - by punith
    We have a setup where there are distributed Nagios running on multiple sites and are equalizing their data to the main Nagios server. The problem is it sends back the data to main Nagios server no matter if there is a state change in host or service. Is it possible to configure the slave Nagios to check the service/Host every 5 sec but send back the data only if there is a state change. Currently it is implemented by Obsess Over Hosts/Service which always runs the command which will equalize. Nagios version is 3 I am no administrator but a developer so I don't know the exact jargon so please bare with me.

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  • What is a realistic average time difference between servers in the same LAN?

    - by monster
    Until recently, we had at work a small cluster of about 20 small Windows servers (which have now all been virtualized). They were all configured to synchronize with the local time server. It was on an 1Gb sub-network in our own DC. I never got them to be less than about 100ms away from each other, which I consider to be an incredibly big difference. Is that a normal value? What is a realistic expectation of time difference between machines running on a 1Gb network, and all connected to the same time server, and updating frequently, say every 5 minutes? I would like to know this as setting timeouts and other parameters in a distributed application requires to take that difference into consideration.

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  • Finding documentation for /etc/**/*.dpkg-*

    - by intuited
    During upgrades, files with these extensions appear in /etc and its subdirectories. I gather that *.dpkg-dist contains the file that was distributed with the currently-installed version of a package, and *.dpkg-new contains the version from the version being installed, however I'd like to see the docs to be sure that I'm getting it right. Also there are occasionally other similarly named files, eg *.dpkg-original, and I'd like to be able to read up on these. I've checked /usr/share/doc/dpkg for documentation on this, and come up empty; there's no dpkg-doc package; Google doesn't have anything except unanswered questions. Can someone point me to the documentation for this aspect of debian package management?

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  • Powerpoint paste option from other applications

    - by huggie
    In MS Word, there is an option to choose the pasting behavior between the same application and different applications. It's under the Office button-word options-advanced. However I don't see the same option for Powerpoint. Is there one available? I hate it when they don't make it consistent between apps.

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  • Performance boost for MacBook: Hybrid hard drive or 4GB RAM?

    - by user13572
    I have an aluminium 13" MacBook with 2GB or RAM and 5400RPM 500GB hard drive. The main tasks I perform are developing iPhone and Mac apps in Xcode and websites in Coda. I want to improve the performance so I am considering buying 4GB of RAM or a 500GB Seagate solid-state hybrid drive. What is likely to provide the biggest performance boost?

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  • Windows8.1 create shortcuts with a custom group in My Computer

    - by user222010
    I have did many research about this. And what I could gather is something like this http://lifehacker.com/add-any-shortcut-to-my-computer-with-this-simple-tweak-479751317. The problem with that is it put the shortcuts under the Network Shortcuts, and this is not what I want. I want to create a shortcut in the My Computer explorer under a specific group such as Important Apps. So, how can I get that?

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  • Don't show hidden applications when using Command-Tab

    - by ash
    Hi, I'm wondering if there's a way to not show hidden applications in the list of running apps when using Command-Tab ? LiteSwitch (http://www.proteron.com/) sort of does what I want, except it grays out hidden applications, but I want them to not appear at all. I use hidden applications as a sort of 'I'll get to later, or don't bother me now' method, so it would be great if Command-Tab could honor that (the same was Expose does). Thanks.

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  • Small Business Setup SSO LDAP VPN [closed]

    - by outsmartin
    We are not sure how to setup an efficient network. Things we got so far: Linux Server ( probably Debian ) 3 Desktops + some Laptops ( Win / linux ) NAS ~10 people working 50/50 devs/normal people :) Things we want to achieve: Working from home should be easy, VPN and firewall single username/password for everybody windows/linux desktops should have automatic synched home folders / preferably from the NAS automated hostnames for apps so others can access them like http//john.dev_app from everywhere in the VPN Need starting point and documentation on setting up with Open source tools like OpenVPN and OpenLDAP Any recommendations or links to further literature are welcome.

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  • Performance boast for MacBook: Hybrid hard drive or 4GB RAM?

    - by user13572
    I have an aluminium 13" MacBook with 2GB or RAM and 5400RPM 500GB hard drive. The main tasks I perform are developing iPhone and Mac apps in Xcode and websites in Coda. I want to improve the performance so I am considering buying 4GB of RAM or a 500GB Seagate solid-state hybrid drive. What is likely to provide the biggest performance boast?

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  • Excel axis problem

    - by itid
    I am graphing the height above sea level obtained by GPS at 12 measuring stations, which are distributed along a straight line but NOT equidistantly. Excel does a nice job of creating a suitable Y axis. But, it insists on placing the 12 stations equidistantly along the X axis. Consequently, the line graph does not represent the true cross section of the terrain. It is only true at the stations themselves. Surely there must be a way that I can enter the actual distances between the stations into a column, and get Excel to read from that column and space the values accordingly? It is such a basic mapping procedure for geologists and many others. Thanks

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