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  • How does /burnmemory=XXX boot.ini switch work?

    - by user371602
    I know what the /burnmemory switch does on Windows, but I'd like to understand what Windows is doing under the hood to support it. It's described on msdn as the "amount of memory, in megabytes, that Windows cannot use". Does this mean simply that the kernel does not allow user virtual memory mapping into this area? How is this accomplished in the kernel, and are there other restrictions that the kernel will make when burnmemory is set?

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  • HELP! Snow Leopard's Desktop Icons keeps Resizing Repeatedly

    - by Arashi
    I'm using a new macbook 10.6.5. I've been using mac OS for years. However, the problem that I'm getting is that the desktop icons keep resizing repeatedly. It keeps going to the biggest size possible and its driving me crazy. I've been resizing it back to medium size all the time. But when I start doing something at the finder it starts resizing by itself once again. Is there a fix to this problem? Please help.

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  • XXClone as a tool for migrating Windows XP Home from PATA to SATA HD

    - by raw_noob
    Has anybody had any experience using XXClone as a tool for cloning an existing installation of Windows in order to move it from an old PATA drive to a new, larger SATA without having to reinstall everything? Did you have any problems? Or can you recommend an alternative (free) software tool that you know - preferably from repeated experience - is reliable? I'm looking to move Windows XP Home SP3 to a new disk: same file system, same partition size. Thanks for looking.

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  • Difference between "bit-number" in filesystem and that in OS (like 32,64 bit)?

    - by learner
    I encountered 2 terms ,"FAT32", a file system and "Windows Vista 32 bit". I found that the meaning of a 32 bit OS is that that the OS deals with data in chunks of minimum size 32 bits. I don't quite understand the depth of that, but I figure ,every file in that system with that OS should have a minimum size of 32 bits. I also read that these 32 bits are used to hold data of files' location(reference) and details. Which of it is it? I have also read that 4 GB of RAM is all that is needed at the most if you're on a 32 bit OS. But I don't understand why. If there are 32 bits to hold info about files and their locations,there can be 2^32 possible combinations of it. But I have found in many places,2^32 is divided by 1024 thrice to get 4GB. Why? Did that 2^32 become equal to 2^32 bytes? And about filesystems I read a similar explanation for what 32 means in FAT32. It is supposed to mean that 32 bits are used to number file system block. Now how is different from the number before the OS?

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  • Installing multiple versions of a shared library

    - by nsfyn55
    I am running ubuntu 10.04 and I want to use tmux 1.6. tmux has a dependency on libevent 2. My solution was to compile libevent2 and drop into /usr/local/lib then compile tmux against this lib and drop into /usr/local/bin. This works great until...I restart. This is just an assumption on my part but it seems that other binaries are now linking to the libevent2 library presumably because its on the library path. Because there are 60+ packages with libevent1 dependencies this causes my install to basically lose its mind. Is there an idiomatic way to approach running an application that has a core library dependency on a different version? Should I just statically link the lib?

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  • OS Isolation: Virtualization or Dual-Boot Duplication, a General How To?

    - by Mr_CryptoPrime
    I want to isolate my windows 7 operating system and I have looked into virtualization. This should work with Linux, however, I do want to still have a way to run windows 7 securely, but without significant performance loss, thus eliminating virtualization for that. I know that you can dual boot because I currently do so with my XP/Linux system. Is there a way that I can duplicate my windows 7 system so I can select one at bootup? This way I can ensure that each OS is isolated and not worry about performance loss. However, I am having a lot of trouble finding a solid method for OS duplication?! Is this even possible or must I buy two versions of win7 and somehow install them separately? Any information regarding this would be helpful, thanks! Essentially I want, Two instances of win7 (not necessarily simultaneously running) Each are isolated from one another so that a security breach in one doesn't affect the other. There is no performance loss in either from doing so

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  • Availability of big files on multiple servers

    - by Imises
    I have to handle many (1'000 - 30'000) big files ranging from 200MB up to 2GB. The demand for these files is variable (0 - 300 downloads / file). This is why a single file must saved on 2 or more servers. My servers are placed in different datacenters (France), with different size HDDs (750GB to 4TB). Currently I share the files using PHP and ncftpget / ncftpput, but it's very slow. I need a solution to handle balancing these files across 7+ servers.

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  • How to remove file permissions from an external hard drive?

    - by user2540416
    My macbook recently died and I am currently trying to figure out how to copy my data. What I did was, I took out the hard drive, put it in an enclosure and plugged it in to my other laptop that runs linux. The problem is, I cannot copy files from the hard drive due to file permissions. I tried to access the hard drive as root. But I still cannot copy files. How do I remove file permissions from the harddrive?

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  • Turn 2 USB type A ports (receptacles) into an extension cable with 2 type A receptacles using Linux?

    - by Tianyang Li
    I'm currently trying to connect 2 USB devices together, but both ends are type A plugs. Before I buy a physical extension cords with 2 type A receptacles, I'd like to know if I can connect these 2 devices together at all by passing data "transparently" through a Linux box with = 2 USB ports. I'm actually trying to connect a keyboard to an Android phone, and I want to first try if it can work by using a Linux box as a "virtual" USB extension cord. Has anybody done something like this before? Thanks!

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  • Problems with uninstallation of windows 8

    - by Wolvorin
    I installed windows 8's developer preview version dual boot with win 7 ultimate. I put my win 8's partition to 11 GB (almost), but now when I try to uninstall the win 8 it dont allow me to uninstall it saying no enough space. What to do ?? Then I try to login to win 7 and increase the size of the partition of win 8. This also is not possible. Please help me with it. I want to uninstall it but how and what to do?

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  • O&rsquo;Reilly Half-price Deal to 05:00 PT 14/August/2014 - Malware Forensics Field Guide for Windows Systems

    - by TATWORTH
    Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2014/08/09/orsquoreilly-half-price-deal-to-0500-pt-14august2014---malware-forensics.aspxUntil 05:00 PT 14/August/2014, at http://shop.oreilly.com/product/9781597494724.do?code=WKFRNS, O’Reilly are offering half-price on the E-book Malware Forensics Field Guide for Windows Systems. “Dissecting the dark side of the Internet with its infectious worms, botnets, rootkits, and Trojan horse programs (known as malware) is a treacherous condition for any forensic investigator or analyst. Written by information security experts with real-world investigative experience, Malware Forensics Field Guide for Windows Systems is a "tool" with checklists for specific tasks, case studies of difficult situations, and expert analyst tips.”

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  • git in non-distributed, independent, lone programming ...best practice(s) ?

    - by explorest
    I am currently studying the git documentation to get a hang of distributed version control workflow and use of git command line. I want to first start using git with small, personal, pet projects so to gain experience before doing it on large scale (i.e., bigger projects, team dev). What areas of the git system should I, as a lone player, devote most of my study time to... what parts should I leave for the larger scale work later on. In other words what features of the git system will fully be grasped in team work only, and therefore should not be too involved with at an individual level?

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  • Are there studies about the disadvantages of using issue tracking systems? [closed]

    - by user1062120
    I don't like issue tracking systems because: It takes too much time to describe issues in it. This discourage its usage. You create a place to keep your bugs. And if there is a place for them, people usually don't care too much about fixing a bug cause they can put it there so that someday someone can fix it (or not). With time, the bug lists gets so long that nobody can deal with it anymore, taking up a lot of our time. I prefer handling issues using post-its on a white board, face-to-face conversations and killing important bugs as soon as they appear. I don't care too much to keep track of bug history because I don't think that it is worth the overhead. Am I alone here? Are there studies (book/article/whatever) about the disadvantages (or great advantages) of using issue tracking systems?

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  • scrapy - python question

    - by tom smith
    Hi.. Maybe not the correct place to post. But, I'm going to try anyway! I've got a couple of test python parsing scripts that I created. They work enough for me to test what I'm working on. However, I recently came across the python framework, Scrapy, which is used for web scraping. My app runs in a distributed process, across a testbed of multiple servers. I'm trying to understand scrapy, to see if it provides benefits over what I'm doing. So, if possible, I'd really like to talk with a few people who are grounded in/or who use scrapy. Thanks -tom [email protected]

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  • Best CPUs for speeding up compiling times of C++ w/ DistGCC

    - by Jay
    I'm putting together a distributed build farm with DistGCC to speed up our teams compile times and just looking for thoughts on which processors to use in the hosts. Are we going to get a noticeable decrease in time using 8 cores vs. 4-hyperthreaded cores? Big difference in time between i7 and Xeon? etc, etc. Just need advice from people who've put together kick-a build clusters. We've got a majority of the normal things to speed up builds in place (pre-compiled headers, ccache, local gigabit connections between them, tons of ram, etc) so please just give advice on the best processor to use. And money is a factor, but anythings doable if the performance increase is noticeable. Thanks. Jay

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  • What is the difference between Java RMI and JMS?

    - by Sanoj
    When designing an distributed application in Java there seams to be a few technologies that address the same kind of problem. I have briefly read about Java Remote Method Invocation and Java Message Service, but it is hard to really see the difference. Java RMI seams to be more tightly coupled than JMS because JMS use asynchronous communication, but otherwise I don't see any big differences. What is the difference between them? Is one of them newer than the other one? Which one is more common/popular in enterprises? What advantages do they have over eachother? When is one preferred over the other? Do they differ much in how difficult they are to implement? I also think that Web Services and CORBA address the same problem.

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  • ZooKeeper and RabbitMQ/Qpid together - overkill or a good combination?

    - by Chris Sears
    Greetings, I'm evaluating some components for a multi-data center distributed system. We're going to be using message queues (via either RabbitMQ or Qpid) so agents can make asynchronous requests to other agents without worrying about addressing, routing, load balancing or retransmission. In many cases, the agents will be interacting with components that were not designed for highly concurrent access, so locking and cross-agent coordination will be needed to avoid race conditions. Also, we'd like the system to automatically respond to agent or data center failures. With the above use cases in mind, ZooKeeper seemed like it might be a good fit. But I'm wondering if trying to use both ZK and message queuing is overkill. It seems like what Zookeeper does could be accomplished by my own cluster manager using AMQP messaging, but that would be hard to get really right. On the other hand, I've seen some examples where ZooKeeper was used to implement message queuing, but I think RabbitMQ/Qpid are a more natural fit for that. Has anyone out there used a combination like this? Thanks in advance, -Chris

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  • what is a data serialization system?

    - by Yang
    according to Apache AVRO project, "Avro is a serialization system". By saying data serialization system, does it mean that avro is a product or api? also, I am not quit sure about what a data serialization system is? for now, my understanding is that it is a protocol that defines how data object is passed over the network. Can anyone help explain it in an intuitive way that it is easier for people with limited distributed computing background to understand? Thanks in advance!

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  • Efficient multiple services exposed over c# .NET remoting using more channels or end points?

    - by wb
    I am using remoting over TCP for a prototype distributed server application where I want to have varying multiple services exposed from each remoting server process. In some cases I want the services running from the same process but I don't want whatever is using the service to care about that. I am wondering is it more efficient to have multiple services in the same process going over the same remoting channel distinguished by endpoint URI/URL or should I be creating new channels on different ports for each service in the same process? Using up ports isn't so much of a problem as the number of services will be low and the network and machine configuration is completely controlled. Also its not clear to me if remoting sends the URI string for every single message or just at connection time, and whether if the remoting framework is intelligent enough to reduce work if calls are made on the same machine and even the same process? Thanks in advance.

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  • MPI Large Data all to all transfer

    - by csslayer
    My application of MPI has some process that generate some large data. Say we have N+1 process (one for master control, others are workers), each of worker processes generate large data, which is now simply write to normal file, named file1, file2, ..., fileN. The size of each file may be quite different. Now I need to send all fileM to rank M process to do the next job, So it's just like all to all data transfer. My problem is how should I use MPI API to send these files efficiently? I used to use windows share folder to transfer these before, but I think it's not a good idea. I have think about MPI_file and MPI_All_to_all, but these functions seems not to be so suitable for my case. Simple MPI_Send and MPI_Recv seems hard to be used because every process need to transfer large data, and I don't want to use distributed file system for now.

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  • Which file system to use for portable hard drive shared among different operating systems?

    - by Jonathon Watney
    Something similar has been asked already but my criteria is a little different. I need to share a portable hard drive (USB/Firewire) between Mac OSX, Linux and Windows XP systems where the files being shared are sometimes 4GB. Is there a file system that is available out of the box on all these operating systems that support this and allows read/write access? If not, what's the next best solution in terms of installing additional software on these operating systems?

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