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  • Average Difference and Direction Between Values in Excel with Blanks

    - by 114
    I have a sheet that looks something like this: Sheet 1 1 2 3 4 5 6 7 8 9 10 11 1 6 2 3 5 3 4 2 4 9 4 5 6 4 6 6 7 5 3 3 3 10 8 4 8 8 9 4 11 12 12 6 10 11 8 5 5 4 9 4 7 6 What I would like to be able to do is find the average difference and direction between values in each column. For example, the first 4 rows would look like: Average Difference # + Movements # -Movements 1 2 2 1 0 3 4 (2+5+5)/3 2 1 Blanks represent N/A values due to insufficient information, and differences are calculated successively i.e. col2-col1, col3-col2, col4-col3 If I just take the differences and make a duplicate table with the formula =C2-B2 copied across issues arise whenever there is a blank space between two values or at the beginning of the row. Is there an easy way to fix this or another way to do this that I might be missing?

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  • Can I run Ubuntu directly under Windows 8?

    - by huahsin68
    Text below is extract from the article, Windows 8 Tip: Virtualize with Hyper-V. Better still, Windows Virtual PC offered a feature called XP Mode, free for users of Windows 7 Professional, Enterprise, and Ultimate, which included a full working copy of Windows XP with Service Pack 3. But the big deal here is that as you installed applications in the virtual copy of XP, they would be made available through Windows 7’s Start Menu. And you could run these applications, side-by-side, with Windows 7 applications on the Windows 7 desktop. It was a seamless, integrated experience, ideal for those one-off application compatibility issues. I was thinking to install VirtualBox in Windows 8 and then run Ubuntu as guess OS. Since Hyper-V is a Type-0 hipervisor, may I know does this bring the same benefit if I have Ubuntu Linux install as a virtual guess OS? Meaning, if I turning the Ubuntu on (the guess OS), does the Ubuntu still able to access the hardware information like nVidia display card or processor information? I'm just curious to know can this be done?

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  • How to monitor nginx proxy cache?

    - by Isaac
    I would like to see which objects get cached by my nginx reverse proxy (with an apache as a backend). So far I could not find a way, only the info that its not implemented yet. The reason is that I would like to tweak my configuration for best performance without putting too much stress on the server, as the backend is a production system. I know benchmarking would be better, but its not an option right now. So I though an alternative measure would be to monitor the cache. Is that possible, and if yes, how? (despite patching nginx with the patch mentioned in the link above)

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  • Freeze during Battlefield 3 - Probable Hardware issue?

    - by HendsteR
    my friend's notebook frequently freezes during BF3 sessions since ~1 1/2 months. It runs Win764Bit and he already reinstalled windows during the process, it didn't help. So we guess it might probably be a hardware issue. Now the question - which part of the hardware could effect a total freeze of the system WITHOUT getting a bluescreen? Or are there any known software issues he could also try? The hardware specs are: Acer 7745G Intel i7 720QM AMD Mobility 5850HD - Running Catalyst 11.6 now btw. (all drivers tested from 11.2 to 12.6 though) 4GB Ram 1.333MHz Oh and yeah, he just added that it crashes playing Diablo3 from time to time, too. Please help :)

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  • Windows 8: Multiple monitors with varying DPI? [closed]

    - by Sid
    Possible Duplicate: Dual monitors on Windows - How do I set a different DPI or text size on each monitor? I'm running Windows 8 on my Macbook Pro Retina (220dpi) which has an external 24" monitor (~96 dpi). In Mac OS 10.8.2, the display settings seem ok and I can actually use both displays without usability issues. I don't know what scaling settings etc it uses but it looks fine. On Windows 8, however when I boost the DPI settings to take advantage of the retina display, it blows up the display on the external monitor - text is giant sized. How can I tell Windows 8 to use the real DPI settings of each monitor? NOTE: I'm not asking for Windows 7.

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  • How to clean up orphaned SID's in ACEs in AD?

    - by geoffc
    As a follow up to my question Do backlinks clear in AD for deleted users I have another related but different question. Since I am informed in the answers there that a deleted object's SID (Group or User, so assigning rights to group only minimizes the issue, and does not fix it) will remain within ACEs they have been assigned, leaving them orphaned. Lotus Domino, which has similar issues with back references, has an adminp process to clean up such orphaned references. Is there a similar process in AD that would allow you to clean up such orphaned SIDs floating around your domain?

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  • Hooking up many different external HDs simultaneously

    - by cbizz
    I need a large amount of external storage for an upcoming project. I'm planning on purchasing 10 2TB external drives. I need them all hooked up to a single machine at the same time. What issues will I run into? I plan on using 2 power strips and having them all externally powered from the wall. I will use a USB hub to plug in all the drives. I need drive access time to be as fast as possible. I am using Ubuntu Linux(64 bit). Will I be able to mount 10 drives?

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  • Sharing RAM resources between 2 or more computers

    - by davee44
    I know there was a somewhat similar question before: How to share CPU or RAM? But, let me just specify it a little more... When Microsoft Windows requires more RAM capacity than available it uses a swap-file to temporarily store the data there, this is actually something like a hard-drive-based RAM. This technology is used for many years. Theoretically, it shouldn't be too hard to implement a similar technology that uses the RAM of different computer(s) in the network for temporary data storage. This just requires a software that runs on computers in the network that accepts and returns data from/to the main computer and keep that data in the RAM; plus the operation system of the main computer must have the ability to use computers in the network instead of (or in addition to) the swap-file. I wonder, are there any implementations of this idea? This would allow users to build RAM clusters using all of their home or office computers, that will boost the performance of a single computer for some development/gaming/video tasks, etc.

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  • Windows 8.1 keeps prompting for Network Share Credentials after every log on or restart

    - by Peret del Trunfa
    I have a Network drive Shared in a Workgroup with 3 clients. Two clients with Windows 7 have persistent connections to the Share. No issues with those two. My windows 8.1 client keeps prompting for credentials at every restart / log on. I spent hours looking around for a solution: I have stored cred in cred manager, and tried every possible combination (WORKGROUP\user , COMPUTERNAME\user, user, .. and so on). I have changed NT and NTLM negotiation in policy manager. I've compared the settings under GPO network security with a working win 7 computer, everything is pretty much the same. -I've captured Wireshark to see SMB negotiation process, honestly I see the messages flowing around, and the share sending AUTH DENIED.. which means is how the 8.1 client formats the request.... that makes the share reject it.. Now I still don't really know why. Any ideas would be appreciated.

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  • Should we regularly schedule mysqlcheck (or databsae optimization)

    - by scatteredbomb
    We run a forum with some 2 million posts and I've noticed that if left untouched the overhead in the mySQL (as listed in phpMyAdmin) can get quite large (hundreds of megabytes). I'm wondering if scheduling a normal mysqlcheck to optimize the tables is good practice? Any reason not to do it, say, once a week at an off-peak hour? There was a time over the summer where our site was constantly crashing because mysql was using up all resources. That's when I noticed the huge amount of overhead and optimized the database and haven't had any problems since then with stability. I figured if that was helping alleviate the issues, I should just setup a cron to automatically do this.

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  • Permissions issue on Fedora with separate home partition

    - by Tres
    I am running Fedora 12 and I've setup a partition separate from my root partition to keep shared files and home directories. Now, I've been having permission issues where it says the user cannot chdir into their home directory (/files/home/*). Now, I fixed this originally by chmodding / to 0755 and the home directories also to 0755. And yes, the user is the owner:group of their home directory. Now get this, I didn't change a thing, rebooted, everything still works. Great, right? I boot the server up a day later, and now same ol issue. This is a home server that wasn't on at all at any point in between the working state and non-working state. Also, nothing else was modified. Any ideas? Thanks!

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  • Copy an Amazon EC2 Instance to use locally

    - by Excolo
    Ok, so we have a spare server I have installed Debian Wheezy on, and setup Xen on for virtual machines. It has better performance than all our ec2 instances combined, and will cost less to run (for a few various reasons) I would like to get the EC2 instances downloaded to my server, and converted to run for Xen, but im having difficulty finding anything specific. I did not setup the EC2 instances myself, and am not very familiar with them. Everything I have found (which isnt much) just says "Do XYZ" and I have no idea how to do those. So being as specific as possible would be helpful. Also, confusingly I see people writing in forums saying you can only export linux images (which mine are, Ubuntu images) but then I see on amazons export tool saying you can only export Windows server? Am I missing something here? Is that not the right place to be looking? Thanks

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  • DFS Replication, Users HOME folder - seems not to catch all files... any hints?

    - by TomTom
    I amm moving stuff out of a file Server. I am using DFS for that - the Folders are anyway in a DFS tree, so I can set up a replication temporarily, then drop the old Folder. Works nice, EXCEPT for the Folder containing the users home drives. Which, incidentally, is also the one I can not see all files in due to my permissions. Small Setup. We have 159mb in the users directories, 1280 files, 133 Folders original. The copy only has 157mb, 1269 files, 133 Folders. Anyone knwos of a way to find out what files are missing? IS this a Problem (could be some Caching files that are regenerated). Users are all offline (weekend) ;) This is pretty much the last share - all others had exactly ZERO issues.

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  • Accessing SVN Repository on external drive

    - by Stephen
    I've installed SVN on my Raspberry PI and configured it to access the repository on an external hard drive. In /etc/fstab, I've have the following: //192.168.1.12/SHARE/repos /media/repos cifs sec=ntlm,username=Guest,password=,_netdev,dir_mode=0777,file_mode=0777 0 0 This mounts with no issues. When I go to add a project to the repository using the following command: sudo svn import mywebsite/ file://media/repos/mainrepository/mywebsite/ -m "Initial Upload" I get the following error: svn: E170000: Unable to connect to a repository at URL 'file://media/repos/mainrepository/mywebsite' svn: E170000: Unable to open an ra_local session to URL svn: E170000: Local URL 'file://media/repos/mainrepository/mywebsite' contains unsupported hostname The only thing I think maybe causing the issue is the file settings: drwxrwxrwx 2 root root 0 Jun 11 2009 repos As you can see the owner is root, I think it needs to be www-data, but for some reason I can't change it. Any help appreciated.

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  • Setting CPU cores off-limits to all threads not specified (preferably in Windows 7)

    - by Shinrai
    I have a really specific machine configuration in the works that would really be helped out if there were any way to do this...basically what I'm looking for is the opposite of setting CPU Affinity for a process. I want to be able to tell Windows "No applications except [x] are allowed on [these cores]." Is there any mechanism whatsoever for doing this? (Yes, I am aware of some of the potential issues this could cause and I normally would never fool with processor affinities, since the OS usually does a damned good job itself, but this is a pretty odd situation involving some software that is very CPU-bound constantly having to wait on interrupts and DPCs and things from other threads.)

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  • what are the rules for SLI ( GTX 550 Ti )

    - by equivalent8
    I got ASUS GTX 550 Ti and I want to SLI it with another graphic card. I heard that not all graphic cards are good idea to SLI, (or not all combinations) because sometimes the final performance could be even worse that with one graphic card. Is that true? What are the rules ? ( maybe chip-set needs to be same or something ? ) I was wondering if you can recommend me what Graphic card should I use as with mine. Should I use same one (GTX 550 Ti) ?

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  • Django on Windows 2003 Slow Initially

    - by John
    I have setup Django to run on a windows 2003 server following the steps on the django wiki. Everything works fine and there are no errors. Only one instance of Django is setup on the server at the moment. However whenever the first page is requested it takes about 10 seconds to load the page. After this every page loads instantly. All my searches about speed issues with Django on windows refer to the local server, but not when using IIS and PyISAPIe. Thanks

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  • Solaris 10: Identify a PID and the CPU it's running on

    - by Marcus
    I have multiple instances of a database running on a Solaris system. I'd like to prove that each database process is being handled by a different CPU. Essentially, I want to be able to do something like a ps -ef | grep <process_name> to get the PIDs and then run another command (if required) to identify the CPU... Is prstat able to do this? I'm making an assumption that as each database instance is started each one uses a different CPU. I'm not sure if I'm understanding this correctly... The reason I want to do this is because Sun hardware has slow CPU's, but lots of them. Therefore, to get the best performance out of it, I need to try and spread the load among CPU's... Thanks

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  • Solaris 10: Identify a PID and the CPU it's running on

    - by Marcus
    I have multiple instances of a database running on a Solaris system. I'd like to prove that each database process is being handled by a different CPU. Essentially, I want to be able to do something like a ps -ef | grep <process_name> to get the PIDs and then run another command (if required) to identify the CPU... Is prstat able to do this? I'm making an assumption that as each database instance is started each one uses a different CPU. I'm not sure if I'm understanding this correctly... The reason I want to do this is because Sun hardware has slow CPU's, but lots of them. Therefore, to get the best performance out of it, I need to try and spread the load among CPU's... Thanks

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  • Hardware recommendations for building an Ubuntu encrypted file server

    - by Robert Mashlan
    I would like to build a file server for my home network using Ubuntu. It will serve files from RAID1 configured disks, either in the OS or in hardware. It will be connected to a Gigabit ethernet LAN. The disks will use an encrypted file system. It will serve samba shares. I would like a recommendation on what kind of processing power/memory I would need to build a box that would be able to sustain the full capacity of the Gigabit ethernet connection in a file transfer for a single connection with the overhead of serving from an encrypted disk. I'm not looking to build a dream server, I just want enough processing capacity for high performance (and reliable) file sharing and spend as little as possible for it. This may be tangential, but what kind of hardware would I need to have a server be able to reliably go into a low power mode when no requests are being made of it?

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  • Should I install an AV product on my domain controllers?

    - by mhud
    Should I run a server-specific antivirus, regular antivirus, or no antivirus at all on my servers, particularly my Domain Controllers? Here's some background about why I'm asking this question: I've never questioned that antivirus software should be running on all windows machines, period. Lately I've had some obscure Active Directory related issues that I have tracked down to antivirus software running on our domain controllers. The specific issue was that Symantec Endpoint Protection was running on all domain controllers. Occasionally, our Exchange server triggered a false-positive in Symantec's "Network Threat Protection" on each DC in sequence. After exhausting access to all DCs, Exchange began refusing requests, presumably because it could not communicate with any Global Catalog servers or perform any authentication. Outages would last about ten minutes at a time, and would occur once every few days. It took a long time to isolate the problem because it was not easily reproducible and generally investigation was done after the issue resolved itself.

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  • Cannot install Java 7 update 9 32-bit on Win 7 64

    - by J. Parrino
    As there were several versons of Java on my laptop, I decided to uninstall them all and reinstall only the current version. I uninstalled all 64-bit and 32-bit versions using Revo Uninstaller. After dowloading the current versions, when attempting to install them, I get a message that both the 64-bit and 32-bit versions cannot be installed as they are already installed. Both the Windows 7 Programs and Features and Revo show no Java installed at al. I then tried the Microsoft Fixit for install and uninstall issues (KB 2438651). I was then able to install the 64-bit version, but continued to have the issue with the 32-bit version. I ran CCleaner, Glary Utilities and Auslogics Registry Cleaner, and noticed Java keys that were to be uninstalled. After cleaning the registry, I attemped to install the 32-bit version of Java once more, to no avail. Any suggestions on how to rectify this problem? Thank you for any guidance you can provide.

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  • Fastest security check of file tree on NFS

    - by fungs
    I am currently experiencing very bad performance using the following on an NFS network folder: time find . | while read f; do test -L "$f" && f=$(readlink -m $f); grp="$(stat -c %G $f)"; perm="$(stat -c %A $f)"; done Question 1) Within the loop permissions are checked using the variables grp and perm. Is there a way to lower the amount of disc I/O for these kind of checks over the network (e.g. read all meta data at once using find)? Question 2) It seems like the NFS isn't tuned very well, the same operation on a similar network link via SSHFS take only one third of the time. All parameters are auto-negotiated. Any suggestions?

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  • Which modules can be disabled in apache2.4 on windows

    - by j0h
    I have an Apache 2.4 webserver running on Windows. I am looking into system hardening and the config file httpd.conf. There are numerous load modules and I am wondering which modules I can safely disable for performance and / or security improvements. Some examples of things I would think I can disable are: LoadModule cgi_module others like LoadModule rewrite_module LoadModule version_module LoadModule proxy_module LoadModule setenvif_module I am not so sure they can be disabled. I am running php5 as a scripting engine, with no databases, and that is it. My loaded modules are: core mod_win32 mpm_winnt http_core mod_so mod_access_compat mod_actions mod_alias mod_allowmethods mod_asis mod_auth_basic mod_authn_core mod_authn_file mod_authz_core mod_authz_groupfile mod_authz_host mod_authz_user mod_autoindex mod_dav_lock mod_dir mod_env mod_headers mod_include mod_info mod_isapi mod_log_config mod_cache_disk mod_mime mod_negotiation mod_proxy mod_proxy_ajp mod_rewrite mod_setenvif mod_socache_shmcb mod_ssl mod_status mod_version mod_php5

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  • Apache on Windows in production environment? Why not?

    - by tillda
    "Everyone" know that Apache is for Linux/Unix and on Windows IIS is the way to go. However, I'm not a pro at Linux and it would be an enormous relief for me to use just the same setup in the production environment that I use during development. I'm a solo developer and I'm trying to make things as simple as possible. I've already got rid of other issues like storage (-cloud) emails (-postmark). So, what are the real drawbacks that can happen when I just put Apache in Windows virtual private server from Rackspace and use it as the main production environment for a PHP project? Money for more VPS resources is not that big issue compared to the possibility of not having to learn a different OS. Super-heavy traffic is not expected. Also my PHP project can be quite optimized. There are some heavy scripts, but only for the inside (logged) users. All else can be served more or less statically.

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