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  • Through the Virtual Microscope–SQL Server and Hyper-V

    - by GavinPayneUK
    In my recent SQLBits conference session, Through the Virtual Looking Glass available to watch here , I spoke about monitoring SQL Server in a virtualised environment.  We looked at good and bad contention, where resource pressures which can adversely affect SQL Server might come from and most importantly how we can monitor the environment to detect them. Since then, I’ve been in discussions with some of the Microsoft product team who are focussed on optimising Windows 8 Hyper-V and SQL Server...(read more)

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  • External Hard Disk's secter could not be read ?

    - by mgpyone
    I've an 500 GB Seagate External Hard Disk (NTFS) . Currently, I can't open it at Windows. Thus, I've tired with chkdsk command .. but still it stopped and can't continue checking disk.. Also I've tired with fsck on Mac . Then, it shows me the Error .. /Volumes/<HD Name>/ is not a character device CONTINUE? yes /Volumes/<HD Name>/ (NO WRITE) CANNOT READ: BLK 16 CONTINUE? yes THE FOLLOWING DISK SECTORS COULD NOT BE READ: 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, ioctl (GCINFO): Inappropriate ioctl for device fsck: /Volumes/<HD Name>/: can't read disk label The volume I've used is around 300 GB , Thus, it's hard to back up and format again . Thus, any helpful suggestions and solutions will be appreciated pretty well.

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  • Is it dangerous for me to give some of my Model classes Control-like methods?

    - by Pureferret
    In my personal project I have tried to stick to MVC, but I've also been made aware that sticking to MVC too tightly can be a bad thing as it makes writing awkward and forces the flow of the program in odd ways (i.e. some simple functions can be performed by something that normally wouldn't, and avoid MVC related overheads). So I'm beginning to feel justified in this compromise: I have some 'manager programs' that 'own' data and have some way to manipulate it, as such I think they'd count as both part of the model, and part of the control, and to me this feels more natural than keepingthem separate. For instance: One of my Managers is the PlayerCharacterManager that has these methods: void buySkill(PlayerCharacter playerCharacter, Skill skill); void changeName(); void changeRole(); void restatCharacter(); void addCharacterToGame(); void createNewCharacter(); PlayerCharacter getPlayerCharacter(); List<PlayerCharacter> getPlayersCharacter(Player player); List<PlayerCharacter> getAllCharacters(); I hope the mothod names are transparent enough that they don't all need explaining. I've called it a manager because it will help manage all of the PlayerCharacter 'model' objects the code creates, and create and keep a map of these. I may also get it to store other information in the future. I plan to have another two similar classes for this sort of control, but I will orchestrate when and how this happens, and what to do with the returned data via a pure controller class. This splitting up control between informed managers and the controller, as opposed to operating just through a controller seems like it will simplify my code and make it flow more. My question is, is this a dangerous choice, in terms of making the code harder to follow/test/fix? Is this somethign established as good or bad or neutral? I oculdn't find anything similar except the idea of Actors but that's not quite why I'm trying to do. Edit: Perhaps an example is needed; I'm using the Controller to update the view and access the data, so when I click the 'Add new character to a player button' it'll call methods in the controller that then go and tell the PlayerCharacterManager class to create a new character instance, it'll call the PlayerManager class to add that new character to the player-character map, and then it'll add this information to the database, and tell the view to update any GUIs effected. That is the sort of 'control sequence' I'm hoping to create with these manager classes.

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  • What should a Python developer know while learning Ruby?

    - by C J
    I have been a Python programmer for about 18 months, consisting of one internship and a few side projects, and I consider myself pretty comfortable in the language. However, there seems to be a lot of attention on Ruby in the programming field, but not a lot on Python anymore. So in learning Ruby, are there going to be Pythonic things that are just bad practices in Ruby? What should I watch out for, and what should I avoid?

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  • PHP Drupal alternatives

    - by Quinma
    Based off answers to this question: Will I pick bad coding habits from PHP books? and many others it is a general consensus that PHP is not the most well suited language for web development anymore (if you are not completely knowledgeable about the language). I use Drupal and write custom modules in PHP, does this viewpoint of PHP being an ill fitted web coding language also apply to Drupal based PHP sites? I generally build community sites and intra-company sites, are there better means of building these than with PHP and drupal frameworks?

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  • Programs and memory consumption [closed]

    - by cobie
    I have a 4gb ram macbook pro but I still run out of memory when I have chrome and a few other light weight applications open such as multiple windows of macvim. These programs are written in C/C++ so technically should be memory efficient but why do they suck up all these memory. is it just bad engineering or graphical user interfaces because I have read about incredible feats performed in software dev back in the early computing days with very limited memory but now it just feels like the applications expand to fill all my memory.

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  • Database implementation question?

    - by gundam
    consider a disk with a sector size of 512 bytes, 2000 tracks/surface, 50 sectors/track, 5 doubled sided platters, average seek time is 10 msec. Assume a block size of 1024-byte is selected. Assume a file that contains 100,000 records of 100-byte each is to be stored on the disk, and NONE of the reocd can be spanned 2 blocks. How many blocks are needed to store the entire file?? If the file is arranged sequentially on disk, how many surfaces are required?? Now, i have calculated that 10,000 blocks are needed to store 100,000 records. But i am not sure how to find out the answer of the surfaces required. I only calculated the capacity of track is 25KB and capacity of surface is 50,000 KB But I don't know how to calculate the number of surfaces... Could anyone help me how to get the answer? Thanks a lot!!

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  • Best books on Managing a Software Development Team? [closed]

    - by JohnFx
    The canonical books on software development is fairly well established. However, after reading through a dreadful book full of bad advice on managing programming teams this weekend I am looking for recommendations for really good books that focus on the management side of programming (recruiting, performance measurement/management, motivation, best practices, organizational structure, etc.) and not as much on the construction of software itself. Any suggestions?

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  • Test Preparation Materials

    - by GavinPayneUK
    I wrote an article on my personal blog a few weeks ago about my preparation for my first Microsoft exam, 70-432.  ( link )  Since then I’ve been reading and demo’ing all the relevant features of SQL Server in the hope that if I get questions on them I’ll be prepared. I’ve learnt a few things in the last couple of weeks, some good, some bad which I’ll now share. The first thing I found is that learning about how SQL Server works is fun and interesting, far better than spending an evening...(read more)

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  • Implenting ActiveRecord with inheritance?

    - by King
    I recently converted an old application that was using XML files as the data store to use SQL instead. To avoid a lot of changes I basically created ActiveRecord style classes that inherited from the original business objects. For example SomeClassRecord :SomeClass //ID Property //Save method I then used this new class in place of the other one, because of polymorphism I didn't need to change any methods that took SomeClass as a parameter. Would this be considered 'Bad'? What would be a better alternative?

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  • Wrong resolution for TV connected via HDMI (32LG3000)

    - by timse201
    I have a LG Electronics 32LG3000 TV. I can't select the right resolution for my TV connected via HDMI. I can select 1360x768 but not 1366x768. The quality on my TV is very bad. HDMI1 connected 1360x768+1280+0 (normal left inverted right x axis y axis) 700mm x 390mm 1360x768 59.8*+ 1920x1080 60.0 1280x1024 60.0 1280x720 59.7 1024x768 75.1 70.1 60.0 832x624 74.6 800x600 75.0 60.3 640x480 75.0 60.0 59.9 720x400 70.1 I have a Intel 3000 graphic card and no settings menu like this there are no restricted drivers for my mac.

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  • Is it possible to measure if someone is a 'good' programmer? [closed]

    - by Alex Angas
    Possible Duplicate: How Can I Know Whether I Am a Good Programmer? There are a number of questions here about recognising or considering someone as a good/bad programmer. These are all subjective. What I'd like to know is if there is a way to measure this. I realise there will and should be a subjective element to it. But is it also possible to have some actual numbers to back up (or contradict) such an assessment?

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  • How to suspend a user from coming back on my website and register again? any ideas? [closed]

    - by ahmed amro
    i am an outsourcing person not a programmer and i am working on shopping website like ebay , so my question might be beginner for everyone.my website will need a user suspension in case he violates the terms and conditions. here is some thoughts on my mind: -IP address tracking -User information ( email address or any information are going to be repeated on second time of registration after suspension) -session Id cookies are also a way to identify the users after log in any more creative suggested ideas to avoid fraud and scammers, it it possible to make 100% impossible to avoid those bad users from coming back ?

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  • How can I make a non-destructive copy of a (NTFS) partition?

    - by violet313
    I want to recover some deleted files from a healthy NTFS partition on an undamaged hard-disk. In order to leave the partition undisturbed, i plan to use dd to clone the partition to a raw image file & then attempt recovery from that mounted clone. Will dd if=/dev/sd<xn> of=/path/to/output.img perform a non-destructive copy ? Is attempting a restore from a clone using dd the best approach? [edit, wrt Deltiks answer, i need to be a bit clearer about what i'm asking] eg: are there some s/w that can do something more with the original sectors ? eg: if it was a damaged hard-disk i am aware that any kind of read is potentially destructive. but assuming my disk head is not going to suddenly spaz out etc, am i reducing my chances of a successful recovery (at any cost) by using an apparently non-destructive single read of my undamaged hard-disk. (btw: i am planning on using ntfsundelete & testdisk for recovery)

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  • Can't use ubuntu 12.04 , after pc crashed while updating

    - by ilias
    few days ago while ubuntu 12.04 was doing a common system uodate , my laptop turned off in the middle of process , due to bad ac power. Since then , i can only login but nothing else. A message about compiz appear , but mouse keyboard , icons , unity are not working. the only thing i was able to do is a boot-repear ,as discribed in ubuntu's site, but neither this helped. Hope you can help me. thanks!

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  • Black screen with cursor after BIOS screen

    - by Radio
    Here is a weird one, Got computer with Windows XP. It's getting stuck on a black screen with cursor blinking. What did I do: - Boot from installation CD (recovery option - command line): chkdsk C: /R copy D:\i386\ntdetect.com c:\ copy D:\i386\ntldr c:\ fixmbr fixboot Chkdsk showed 0 bad sectors and no problems during scan. dir on C:\ shows all directories and files in place (Windows, Program Files, Documents and Settings). BIOS shows correct boot drive. Still does not boot. Not sure what to think of. Please help. UPDATE: Just performed these steps: Backed up current disk C: (without MBR) using True Image to external hard drive Ran Windows XP clean installation with deleting all partitions and creating new one. Hard drive booted fine into Windows GUI installation!!! Then: I interrupted installation. Booted from True Image recovery CD and restored archive of disk C to an new partition. Same issue with black screen.

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  • Database implementation question? [closed]

    - by gundam
    consider a disk with a sector size of 512 bytes, 2000 tracks/surface, 50 sectors/track, 5 doubled sided platters, average seek time is 10 msec. Assume a block size of 1024-byte is selected. Assume a file that contains 100,000 records of 100-byte each is to be stored on the disk, and NONE of the reocd can be spanned 2 blocks. How many blocks are needed to store the entire file?? If the file is arranged sequentially on disk, how many surfaces are required?? Now, i have calculated that 10,000 blocks are needed to store 100,000 records. But i am not sure how to find out the answer of the surfaces required. I only calculated the capacity of track is 25KB and capacity of surface is 50,000 KB But I don't know how to calculate the number of surfaces... Could anyone help me how to get the answer? Thanks a lot!!

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  • What needs updating when moving a bootable Windows 7 (or Vista) partition?

    - by SuperTempel
    When I move a bootable NTFS partition with Windows on it to a different block offset, what needs updating to make it bootable again? In particular, here's what I tried: I have a disk with several partitions, one of which is the NTFS partition with Windows on it, and the disk uses the plain old MBR block 0 for the partitions layout (no more than 4 partitions). Now I format and partition a new, larger, disk. There I make room for the NTFS partition and copy the contents from the old disk's NTFS Windows partition into. And I make the partition "active". However, when I try to boot from this disk, I get a "read error" message immediately and the booting stops, the exact text is: A disk read error occurred Press Ctrl+Alt+Del to restart I verified that both disks have the same boot sector code in block 0. It seems to me that something else might need updating. I guess that somewhere there's a absolute block reference that I need to update, probably pointing to the next level loader or to the NT kernel. Update: I found this article going quite into the depth of what I want to know. However, it says to modify boot.ini, but I have Windows 7 installed here, where such things appear to have changed: No boot.ini but a folder called System Volume Information with GUID and other data in it that sounds related to my problem. Going to keep digging... Update 2: Thanks to the terrible looking but very informative website by starman, I was able to figure out the first step: The NTFS boot sector has a field for "hidden" sectors. This feld has to contain the sector number of the boot sector. This solves the "read error" message. Now, however, I get a "BOOTMGR is missing" error instead. Looks like there's another place where a block number has to be adjusted, but I can't find anything in the code listing about this. I do find a lot of help sites suggesting Windows tools for fixing this "BOOTMGR is missing" problem, but none seem to know what goes on behind the scenes. Kind of like suggesting to re-install Windows when there's a little problem with it. At least, those fixes seem to work, mostly involving the Bcdedit and Bootrec tools. Now, who knows what they do, especially the latter, in regards to a moved partition? Update 3: After lots of trial-and-error attempts, I believe now that the solution lies in the BCD-Template registry file, residing usually inside \Windows\System32\config. If I get this updated using the "bcdboot" command, Windows starts up from it. I am now in the middle of figuring out what information this registry contains relevant to the above question. Any pointers to the contents of this registry are welcome. Update 4: Turns out that while the BCD-Template file gets rewritten and has different binary contents than its predecessor, the values inside do not change. So it must be something else that bcdboot.exe writes. I had previously already checked if it changes the first 32 boot blocks of the partition, but they appear to remain unchanged. Parititon map doesn't get changed, either. So what is it that bcdboot modifies besides the BCD registry? Any tips on how I can trace that? Are there low level tools that show me what files a program writes to? Update 5: The answer seems to be: c:\Boot\BCD is also changed, and that appears to be the key file for the boot manager's process. I'll investigate this later... Update 6: It seems to be an important detail that I had originally two partitions created when I installed Windows 7: A small partition of 204800 sectors which appears to be a bootstrap partition, followed by the actual, large, partition containing the Windows system (drive C:). When I tried to transfer this installation to a new, larger, disk, I had kept the same two partitions intact on the new drive, although they ended up at a different offset. This alone led to the "BOOTMGR is missing" message. Since then, I've used bcdboot.exe only on the Windows partition, which added the \Boot\BCD file on that partition. That file (and folder) did originally only exist on the smaller partition. Hence, this problem may be more complicated in my case as one partition (the boot strapper) referred to another partition (the one containing the OS), whereas other people may only have to deal with one partition containing both, and maybe there the solution is simpler. Update 7: Found one more detail: The \Boot\BCD file records the MBR's serial number. If that number doesn't match, the system won't boot. Next I'll test if there's also an absolute block reference stored in there.

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  • GreenGeeks Customer Review

    GreenGeeks Good or Bad? My opinion on GreenGeeks Hosting? I watched GreenGeeks Web Hosting just after it opened its gates, today the Hosting provider quickly grew to a top provider in the green web... [Author: Chris Bunt - Computers and Internet - May 20, 2010]

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  • Windows Recovery partition unusable after Ubuntu 12.04 install on Eee PC 1005P

    - by Crivat Camilar
    Installed Ubuntu 12.04 over the secondary (D:) partition with Grub2 handling multi-boot. Never accessed the 'Recovery' option in the boot menu until Windows7 Starter became unusable due to HDD failure (bad sectors on C:). Tried creating an USB recovery stick using the OEM's recovery application (F9) on hidden partition: all I got was a clean C:\ and an error telling me the recovery images cannot be found [R:\recovery\windowsre\ - or something very much like that] although everything is there (changed 'hidden' flag to check and copy contents). Nothing happens upon pressing F9, then Grub takes over giving the recovery option. The application starts but halts about 30s after initializing, very briefly displaying the error message above. I guess every time it goes through this it actually wipes C:\ but crashes immediately afterwards not being able to find what-ever .wim image files it needs. How to make it work?

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  • Why You Should Launch Your Own Web Directory

    One of the easiest types of web sites to launch is a link directory. Just download one of the free or inexpensive PHP software packages, install, configure, add some categories, add some links and you're off! Having your own directory isn't a bad idea, despite what some pundits might think, for a number of reasons which I'll outline.

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  • Google Chrome (not chromium) is crashing XFCE on startup. Where can I find some detailed logs of the issue?

    - by MALON
    I'm using xubuntu 12.10 and every time I open Chrome, the desktop enviro crashes then automatically restarts, prompting me to log in again. This is the latest x86 .deb downloaded from Chrome's website. I've tried both installing the .deb using the software package manager and using sudo dpkg -i, same issue for both, except that the package manager puts out an alert that says "This package is of bad quality", but doing a quick google search reveals that particular message is a bug in Chrome and it's safe to ignore.

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