Invoking Remote Processes and Killing them

Hi,
I need to invoke c++/java programs remotely using a web browser on multiple computers on a network. I am running web servers on each of the computers. These web servers host servlets to invoke the processes locally on that computer. The web front end provides invocation of these servlets. The servlets are essentially using Runtime.exec(command) to start of the particular program (c++).
the problem is now killing the processes remotely. Is there anyway I could accomplish that?
Please give a example if possible. The last time I asked this question I was given some very tough answers which I could not comprehend at all.
Thanks.

thanks jschell for the quick reply,
I found out a way to do this. I am using kill.exe, a utility to kill a process in windows given the name of the executing process. It seems to be working fine except a new problem. This may sound a bit wierd too. I am using a couple of machines including a few servers running win2k advanced server. I know using kill.exe on these servers is not a very nice thing to do from a security point of view but the present task is purely academic in nature. Back to the problem. I am able to run the batch file, kill.exe and other stuff on the local machine through a servlet hosted at a web server running on the same machine. I am ablr to do this for most machine except one. Now this machine is running win 2k advanced server too. The exact query that would be defined from this discussion could be -
Are there some setttings that allow how much control is given to the servlets running on the web server at the local system?
Can a servlet, once invoked, perform any action on the machine?
I searched some literature/documentation on this. Did not get anything specific. Your reply would be higly appreciated regarding this.
Cheers!

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Kern wrote:
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'''Open a second window (not a second tab, that is different) when Firefox is already running and displayed on the monitor'''
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What are these processes and how do I prevent them?

For many years, many have complained of external drives that are in standby/sleep spinning up for no apparent reason. From the user's point of view this is unnecesssary, but to make matters worse, the system usually stops everything else while waiting for the drives.
I have a Mac mini that I use as a home theater pc. The media and backups are on a 5-bay enclosure (no RAID) attached by USB. While watching a video, the unused drives will go into standby mode, which is good. But then, with no user activity, they will spin up, freezing the video and everything else, which is not good. As these are slow drives and spin up sequentially, this can take 10-20 seconds. This may happen once or twice an hour, but sometimes more frequently.
In looking into the causes, I have turned off time Machine (after putting these drives into the Privacy section for good measure). I also prevented Spotlight and fsevents logging with the following:
mdutil -i off /Volumes/<drive1> /Volumes/<drive2> . . .
cd /Volumes/<drive1 and then repeat for other drives>
 rm -rf .fseventsd .Spotlight-*
 mkdir .fseventsd
 touch .fseventsd/no_log .metadata_never_index
As far as I can tell this has worked to stop those processes from accessing the drives after they are mounted, but the problem persists. To find out what else might be causing them to wake up:
sudo fs_usage -w | grep -e Volumes/<drive1> -e /Volumes/<drive2> . . .
and here is what I found last night (actually didn't use the -w last night, thus it is cut off):
18:35:36 fsgetpath /Volumes/XBMC 0.000026 SSDragHelper
18:35:36 fsgetpath /Volumes/Stuff 0.000006 SSDragHelper
18:35:36 fsgetpath /Volumes/DatOptic_3 0.000005 SSDragHelper
18:35:36 fsgetpath /Volumes/MacBackUp 0.000003 SSDragHelper
18:36:15 fsgetpath /Volumes/XBMC 0.000026 System Prefe
18:36:15 fsgetpath /Volumes/Stuff 0.000004 System Prefe
18:36:15 fsgetpath /Volumes/DatOptic_3 0.000003 System Prefe
18:36:15 fsgetpath /Volumes/MacBackUp 0.000003 System Prefe
18:55:36 fsgetpath /Volumes/XBMC 0.000034 GoogleSoftwa
18:55:36 fsgetpath /Volumes/Stuff 0.000004 GoogleSoftwa
18:55:36 fsgetpath /Volumes/DatOptic_3 0.000003 GoogleSoftwa
18:55:36 fsgetpath /Volumes/MacBackUp 0.000003 GoogleSoftwa
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Thanks for the reply Hen3ry. Looks like you've done a lot of investigation. For me, fs_usage entries accompanying spindown are not problems - I'm happy if the drives spin down. My problem is the spinups. But still, I don't think it is necessary to time the fs_usage entries with spinups. If you grep for the drives you're concerned about, you will see any process that would potentially wake them up.
Because my understanding is limited, I also am more concerned with the process/application that is accessing the drives than with the functions or commands they are sending. And the values that are returned by those functions are way beyond what I can deal with.
It's interesting that you've found a difference between your old and new drives. Could you specify the enclosure and drives in each case?
The StorageStatus app looks interesting; thanks for the tip.
Here's a summary of what I've done so far, which I think is working. I need a few more weeks to know for sure.
How to prevent unwanted drive spin-ups
If you are actively using the computer that the enclosure is attached to, nothing on God’s green earth will stop OS X from waking them up after some user action, even ones that seem to have nothing to do with the external drives. But if you leave the computer alone while some application is running, like watching a movie or downloading a file, you have a fighting chance of coaxing OS X into leaving the uninvolved drives alone.
If the drives are shared with any other computers over a network, eject them on those computers
Otherwise, OS X (AppleFileServer) will poll them every 10 seconds. This might not be bad if you want to just keep the drives spinning and the other computer stays awake.
Third-party apps
Make sure no apps are running that might access your drives. Google runs some processes that do this (maybe I’m naïve, but I was so shocked I removed chrome and every other trace of Google from my Mac mini system). Another is iStat and any utility that monitors SMART status in the background.
Don’t let Spotlight index or search the drives
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In System Preferences > Spotlight, add the drives to the Privacy pane.
Add a file called .metadata_never_index to the root of each drive (note the leading period). The easiest way to do this is in Terminal
touch /Volumes/<drive1>/.metadata_never_index
Tell Spotlight AGAIN to keep away from the drive:
mdutil -i off /Volumes/<drive1> /Volumes/<drive2> . . .
Finally delete the Spotlight folder from the drive.
rm -rf /Volumes/<drive1>.Spotlight-*
Stop fseventsd from logging in the drive
This is easy, just putting a no_log file in its folder. I have found that rarely it still writes some files in there, but it doesn’t seem to do so when it causes problems, so . . .
 rm –rf /Volumes/<drive1>/.fseventsd/*
 touch /Volumes/<drive1>/.fseventsd/no_log
Finder sidebar
Some people say that if the drives show in the Sidebar of Finder windows, the Finder will be checking them. I’m not sure. But to be safe, in Finder Preferences > Sidebar, uncheck External Disks.
Just say no to Time Machine
On the home theater mac itself, regular backups shouldn’t be needed. You should be able to just turn Time Machine off. However, it is probably sufficient to simply open System Preferences > Time Machine > Options and add the drives to the list of locations to exclude from backup.
Second, local backups can be disabled with
sudo tmutil disablelocal
Look for other culprits
If the problem persists, use fs_usage, which generates a real-time log of filesystem activity. There is so much going on that you need to use grep to restrict the output to entries that involve your drives. The entries that accompany your drive spin-ups are the ones you really want.
sudo fs_usage -w | grep -e Volumes/<drive1> -e /Volumes/<drive2> . . .
Now leave the keyboard and mouse alone, as many things you might do will cause the drives to be accessed. You probably want to find what does it when you’re not actively interacting with the computer. It’s not really necessary to wait for your drives to sleep and see what wakes them. Any activity you see would probably wake the drives if they were asleep. When you see some activity and want to stop and examine, type Control-C to stop the output. On the far right of each entry is the process or application that accessed the disks.
I got pointers from http://system-log.tyr.org.uk/2012/01/31/how-to-stop-usb-drives-from-spinning-up- unnecessarily-on-os-x-lion/ and http://www.jackenhack.com/disk-that-refuses-to-sleep-in-mac-os-x-how-to-fix-it/

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JokerGirl,
This is Scott J, I work for Intel and wanted to try and help you out. Sorry to hear about your current PC and your knee!
I agree with the bigger screen. I have the Samsung ATIV Smart PC with a screen 11.6" which is great to watch shows/movies! anything bigger is almost too big for a tablet (personal opinion).
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Here's an article that might help you narrow down your search: http://electronics.howstuffworks.com/gadgets/high-tech-gadgets/5-tips-for-choosing-the-right-tablet....
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How do I process multiple files and turn them from raw to jpeg. Ive tried and it seems to go through the files but doesnt seem to process them or store them in the selected folder

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Invoking Remote Processes and Killing them

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