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  • Data structure for an ordered set with many defined subsets; retrieve subsets in same order

    - by Aaron
    I'm looking for an efficient way of storing an ordered list/set of items where: The order of items in the master set changes rapidly (subsets maintain the master set's order) Many subsets can be defined and retrieved The number of members in the master set grow rapidly Members are added to and removed from subsets frequently Must allow for somewhat efficient merging of any number of subsets Performance would ideally be biased toward retrieval of the first N items of any subset (or merged subset), and storage would be in-memory (and maybe eventually persistent on disk)

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  • Override jre_lib classes

    - by Filip
    What is the best way to override jre_lib classes? Let's say I need to store all ArrayLists not in RAM but on disk or anywhere else. I wanna write my own ArrayList class to code this functionality and make sure that every instantiations of ArrayList use my class. I thought about class loading mechanism to change order of classpath, but as I see java checks standard classes first.

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  • How can the AssemblyName class be used for existing Assemblies?

    - by IbrarMumtaz
    This is another exam related question. I want to know how can I use the AssemblyName class to represent an existing assembly that already exists on disk??? I am talking about from the perspective of using the AppDomain's instance method .Load(), that takes an AssemblyName object as a parameter. I know what MSDN has to say about what the .Load() method was designed for but that aside, I still want to know how to use it !!!

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  • Why does my simple hello world console app use so much memory?

    - by CodingThunder
    Looking in Process Explorer it uses; Virtual Size: 550,000k , Working Set: 28000k Why does my simple hello world console app use so much memory? I take it the difference between the Working Set and Virtual Size means that difference will be paged to disk? /I am running 64 bit XP. Thanks class Program { static void Main(string[] args) { Console.WriteLine("Hello world"); Console.ReadLine(); } }

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  • Where to look for regular scripts?

    - by fontan
    It seems to me that our server freezes every 30 days around noon due to the huge utilization of xvda data transfer partition - writes are 50 times higher than normally (according to the health monitor in plesk). This seems to me as the reason why the apache & co becomes instable as (for example) all apache's processes are waiting to write their log (according to the service's full status). I am, however, unable to find any scheduled task that would be executed during that period. I have checked both cron and anacron setup and there is only one monthly anacron task which is not executed (according to the /var/log/cron - and there is nothing unusual) around noon. Are there any other places where to look for periodical processes? (I am just about to ask server's provider the same question about any external maintenance run around this time but I don't expect them to run anything time/resource consuming during the day.)

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  • Installing grub2 on ubutntu with software raid mirroring

    - by Marko
    Hi guys, Can someone help me out on this? I accidentally installed grub on usb flash drive during ubuntu server installation. Now I cant boot system without drive attached to server. I want to install grub on hard drive with grub-install but i don't know what to set as location for boot loader? my fstab looks like this: file system mount point type options dump pass proc /proc proc nodev,noexec,nosuid 0 0 /dev/mapper/pdc_jdbeghhjg1 / ext4 errors=remount-ro 0 1 /dev/mapper/pdc_jdbeghhjg5 none swap sw 0 0 and partition tables for hard drives as this: Device Boot Start End Blocks Id System /dev/sda1 2048 1215662079 607830016 83 Linux /dev/sda2 1215664126 1249998847 17167361 5 Extended /dev/sda5 1215664128 1249998847 17167360 82 Linux swap / Solaris Device Boot Start End Blocks Id System /dev/sdb1 1 75672 607830016 83 Linux /dev/sdb2 75672 77809 17167361 5 Extended /dev/sdb5 75672 77809 17167360 82 Linux swap / Solaris ?

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  • JavaScript Output to a File

    - by clops
    I am creating quite a bit of XML with JavaScript which is then processed by variuos components. I would like to send this XML to some file and prompt the user to save it on their disk (all this happens in the browser at the client, no server interaction whatsoever). Is this at all possible? Google is not a lot of help here :(

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  • Removing 'bundled' software to make a slow laptop faster?

    - by spdegabrielle
    My brother-in-law has a cheap HP laptop used by his kids for schoolwork. It had got into a bit of a state and was running slowly with some dubious software. I removed a bunch of stuff that had been installed, that was obviously not required (three different driver scanners!), had been downloaded in error or looked like malware. I also disabled as many 'start on login' apps as I could and removed AVG replacing it with MSE. (AVG is uninstalled and replaced with MSE after failing to detect malware) What remains is a significant quantity of bundled HP and 'nero backup' software, including a HP restore utility (apparently something like the osx hidden partition restore), the trackpad driver. is there anything else I can do to breath a little more life into the old 'celeron' laptop? Should I bit the bullet and just put win8 on it? Will the trackpad still work?

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  • What could be causing LVM errors on first boot after install in Debian?

    - by ianfuture
    Hi, I've installed Debian (lenny) on a machine at home. It was set up during install to have a /boot partition, then the rest was encrypted, then had an LVM ontop of that, then all the other partitons inside LVM. After install completed and on first boot it asked for password to un-encrypt(same password for both drives) then it showed an error which said LVM could not find a physical device with a particular UUID or something similar. LVM install is over two HDs. One is 120GB and one 40GB. 120GB is Master on its IDE cable and this has /boot on it. 40GB is slave on the other IDE cable. Is there anything that could be done to rescue this install? Or diagnose problem? It took ages to get installed due to time spent enrypting drives and I'd rather not go through that again. :( Thanks.. Ian

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  • How can I restore GRUB without a live CD?

    - by Looterguf
    I realize that this is a duplicate of a question asked before, but in that question the asker managed to find his live CD and no real answer appeared, thus I am re-asking it. I managed to screw up my GRUB by deleting two linux partitions on my hard drive from windows. After this, GRUB gives the error "partition not found", and gives me the grub-rescue prompt. The only command I have found to work in this is 'ls', which spits out my partitions. I would use the live CD fix, but I am in India, and all my live CDs are back home in the US... What I've got is an internet connection, a 4GB flash drive with Flow OS installed (which I am currently using but can wipe if need be), and a working laptop that I can borrow. What should I do?

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  • Can you remap "C:\Program Files" like you can with "My Documents"?

    - by Danny
    I'm not sure if this is possible, but I'm hoping you guys will know one way or the other! I'm going to be reinstalling windows xp, and the primary master IDE is a smaller 10 gig drive. I'm pretty sure that if I tried to install all my programs back onto the C:\ drive that they'd not all fit. Is it possible to get my Program Files directory to point to a partition on one of my larger drives, so I don't end up with some of my programs on C:\ and others on D:\, E:\, etc?

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  • how to restore windows 7 to a know working state every time it boots

    - by Artanis
    A couple of days ago my mother asked me to set up a computer at his house, she wants to use it to basic web browsing, video chat and nothing more. The problem is, neither my mother nor my sister know anything about using or maintaining a computer. What I want is to have a working base install of windows 7 and just discard everything installed, downloaded, ... when it reboots. That way I can set up a partition just for saving files and whatever they do the computer will always return to a working state at start up. can that be done? PS: Sadly linux is not an option since my sister wants to be able to play some games with my steam account and not all of them run with wine.

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  • Running a script at startup as root?

    - by Usman Ajmal
    Hi i developed a script which I set to run at startup i.e. when the Desktop appears. In the script I mounted a partition using sudo mount /dev/sda1 /mnt &> result.txt After executing script a file named result.txt was created which contained sudo: no tty present and no askpass program specified In other words the mounting failed. If I run the script using sudo ./myProgram i don't face this problem and the drive gets mounted successfully. Any suggestions please....

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  • Grub loading, please wait. . . Error 22

    - by Aexyn
    Yesterday I got a problem which I posted here. Trying to solve it, I installed slitaz live CD to desktop. After that I tried to use boot other live CD's (Ubuntu, Tiny core) but they didn't boot. So I deleted the the slitaz partition through gparted(or something like that) and restarted. After that I am seeing this error message:` GRUB Loading stage 1.5. Starting cmain() ... GRUB loading, please wait... Error 22` UPDATE: I have tried Backtrack live CD to live boot laptop but that doesn't work too.

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  • Download pdf programatically...

    - by Perplexed
    Hi, How can I download a pdf and store to disk using vb.net or c#? The url (of the pdf) has some rediection going on before the final pdf is reached. I tried the below but the pdf seems corrupted when I attempt to open locally, Dim PdfFile As FileStream = File.OpenWrite(saveTo) Dim PdfStream As MemoryStream = GetFileStream(pdfURL) PdfStream.WriteTo(PdfFile) PdfStream.Flush() PdfStream.Close() PdfFile.Flush() PdfFile.Close() many thanks, KS

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  • Ubuntu 6.06 Boot problem

    - by nijikunai
    I tried to boot my pc using ubuntu 6.06 in the live cd mode but it refuses to boot. It throws the error Uncompressing Linux.. ok, booting from kernel [ 54.168828] ACPI Unable to load the System Descriptor Tables The live cd works perfectly okay in other computers. Out of curiosity, I also tried to boot using Slax live cd, It too threw some errors incomplete literal tree invalid compressed format (err=1) UDF-fs: No partition found (1) XFS: bade magic number XFS: SB validate failed Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0) The slax errors are a bit worrying to me. Thanks for the help in advance!

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  • Red Hat Kickstart: How do I Prevent partitioning?

    - by frio
    Hey all, I'm currently working on a new virtualisation setup using Xen, and Centos for my workplace. We intend to deploy the domUs into LVM volumes. Currently, the only thing preventing this from working as smoothly as we'd like is the Kickstart script's insistence on partitioning. This is the relevant part from our current KS template (which I've been messing with): # Partitioning clearpart --all --initlabel --drives=xvda part / --size=0 --grow --ondisk=xvda --fstype=ext3 This sets up a single partition and installs to it - which would be fine, but I'd prefer if there were no partitions, and installed directly to the existing LVM (so that we could then mount the LVM from the dom0 for backup and maintenance purposes). It's possible I'm doing something wrong, and should be exporting the volume as xvda1 rather than xvda - which I'm more than happy to amend - but I'm still not sure how I'd navigate the Kickstart! I'd really appreciate any help :). Cheers in advance!

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  • Booting a native Windows install in Virtualbox: is it possible?

    - by Aron Rotteveel
    I am looking for something similiar to Bootcamp. Currently, I run Ubuntu Maveric as my primary operating system and run Windows 7 in Virtualbox. For some tasks, however, running Windows virtualized just seems to result in too much overhead and speed loss, and I'd like to be able to boot natively. The ideal situation would be to setup Windows and Ubuntu in dual boot on seperate partitions, with the ability to boot the Windows partition in Virtualbox on Ubuntu as well. Is this possible? Also, how it is that Bootcamp seems to be the only system capable of this?

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