multiple-instances

What techniques are people using to utilize multiple processors/cores when running a TwistedWeb server? Is there a recommended way of doing it? My twisted.web based web service is running on Amazon EC2 instances, which often have multiple CPU cores (8, 16), and the type of work that the service is doing benefits from extra processing power, so i would very much like to use that. I understand that it is possible to use haproxy, squid or a web server, configured as a reverse proxy, in front of multiple instances of Twisted. In fact, we are currently using such a setup, with nginx serving as a

So, I have a windows service which can have multiple instances installed on a single server. The installer needs to be able to upgrade a single instance. The installer uses Instance Transforms, but I am unsure how to get major upgrades working as I would like. For a major upgrade to work, my understanding is that I should have the Product Code change, so instances are defined in this form: <Instance ProductCode="*" UpgradeCode="{SOMEGUID}" ProductName="Instance 1" Id="Instance1"/> The msi can be launched to install a new instance by: msiexec.exe /i "installer.msi" TRANSFORMS=:Instance1

I am trying to run multiple instances of Tomcat, but even after configuring different ports for listening and shutting down the second instance, it keeps trying to listen on 8080 (configured for 8081). I read that I have to set a different value for CATALINA_BASE . From all the articles there are online, none of them actually show in which file this variable can be set. Where and how can I set CATALINA_BASE for my Tomcat instance in C:\apache-tomcat-7.0.39 The easiest way I have run two copies of Tomcat involved the following steps (I was trying to run two distinct versions of tomcat, 6 and 7)

I want to prevent multiple instances of application being launched in java. I know 2 methods for this: locking file locking socket But which is one is more efficient and good to use? Which one should I use? Any other solution to do the same are also welcome. EDIT: I tried that with Win200864b(version isn't important) and alive JFrame and move toFront() or Iconified in SystemTray with JFrame.DO_NOTHING_ON_CLOSE public interface ApplicationStartedListener { void applicationStarted(); void foreignApplicationStarted(String name); void messageArrived(Object obj); } // import java.io.Serializable;

I'm working with Selenium, and am wondering if it's possible to use multiple TABS at once? I do not want to use multiple browser instances (i.e., 2 copies of IE pun). IF IT IS NOT possible, how would one go about switching between individual tabs, that are running sequentially? Thanks! If there is a link that opens up a new window/tab, then you can use driver.switchTo().window(); However, if you want to run something on multiple windows, then I recommend having multiple instances of webdriver. It is much easier to manage, and is supported (There are workarounds on opening a new tab/window,