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  • ZFS recordsize for VirtualBox and other virtual disks

    - by JOTN
    Has anyone run across any good benchmarks or other research on tuning the ZFS recordsize when putting virtual disk files on it for a guest OS? I'm using VirtualBox at the moment. I have notice significant performance improvement when working with a DBMS by setting the ZFS recordsize to the same as the DB blocksize, so I'm guessing matching the blocksize of the guest filesystem would also be a good idea.

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  • Apache, logerror and logrotate: what is the best method?

    - by OlivierDofus
    Hi! Here's a vhost example of my sites: <VirtualHost *:80> DocumentRoot /datas/web/woog ServerName woog.com ServerAlias www.woog.com ErrorLog "|/httpd-2.2.8/bin/rotatelogs /logs/woog/error_log 86400" CustomLog "|/httpd-2.2.8/bin/rotatelogs /logs/woog/access_log 86400" combined DirectoryIndex index.php index.htm <Location /> Allow from All </Location> <Directory /*> Options FollowSymLinks AllowOverride Limit AuthConfig </Directory> </VirtualHost> I've got 12 sites running now. This gives something like: [Shake]:/sources/software/mod_log_rotate# ps x | grep rotate /httpd-2.2.8/bin/rotatelogs /logs/[hidden siteweb]/error_log 86400 /httpd-2.2.8/bin/rotatelogs /logs/[hidden siteweb]/error_log 86400 [snap (as many error_log as virtual hosts)] /httpd-2.2.8/bin/rotatelogs /logs/[hidden siteweb]/access_log 86400 /httpd-2.2.8/bin/rotatelogs /logs/[hidden siteweb]/access_log 86400 [snap (as many access_log as virtual hosts)] grep rotate [Shake]:/sources/software/mod_log_rotate# !!! I've been looking everywhere but I've only found mod_log_rotate. The "little" problem is that the author (very good C developper) explains: "Unfortunately Apache error logs are handled in such a way that we can't work the same log rotation magic on them. Like transfer logs they support piped logging though so you can still use rotatelogs for them. " So my question is: what would be the best way to handle multiple logs? If I just do a very classical log and I use the system's "logrotate" program couldn't this be a good deal? How would/do you deal with that? Thank you!

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  • Installing Visual Studio Express on Windows 8.1

    - by robrene
    I've been trying to install the latest version of Microsoft Visual Studio Express from their website to toy around with the IDE and C# development in general. I have a relatively fresh and completely vanilla installation of Windows 8.1 Professional x64 for this purpose. I come from a Linux background, where installing software (especially software distributed by the maintainer of the OS) is usually done with package managers. First, I tried to look for Visual Studio in the Windows 8 Store. There was one entry, but it did not have an installation button. Instead, it redirected me to their website. From all the products listed under the "Download" section on their website, I decided Visual Studio 2013 Express for Windows Desktop was the best for me. I selected it and clicked on "Install now". An installer program downloaded, and I'm assuming that the installer downloaded the necessary files as it was running. When it was done, it asked for a reboot, to which I obliged. However, I can't seem to find the IDE installed anywhere? It doesn't show up anywhere in the Start menu interface. I can't find any executables that look like they might be the IDE in its installation folder. Running the installer again and selecting "Repair" does download some files, but after its requested reboot, nothing has changed. The only thing that I can find is an advertisement link to "Try other Visual Studio 2013 Products" in my start menu. I suppose my question is what I have to do to run Visual Studio 2013 Express on Windows 8.1? Am I not looking in the right places? Am I doing the installation process wrong? Thanks in advance

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  • How to locate phpmyadmin on ubuntu

    - by Chris
    Okay, I'm usually a windows user and I write quite happily there, unfortunately (or fortunately) I have installed linux on a dual boot and having installed some software I have a question... Where is it? I installed Apache, PHP, MySQL and separately phpmyadmin, Apache is up and running, I've seen my phpinfo page and MySQL is there. MySQL is telling me that there's a database for phpmyadmin, but...erm.. I can't seem to locate it. On a windows machine the directory would be in the www directory and I'd just navigate there... localhost/phpmyadmin/ but on Ubuntu I can't find it in the equivalent. I've been to /var/www/ and there's my index.html (from apache) and my phptest.php file but no phpmyadmin. There is a phpmyadmin in /lib but that only has 2 files in it. So having rambled lots, my question is, what do I have to do to be able to navigate to the phpmyadmin index page? I realise this could fall under the description of a server related question and should be posted elsewhere but as it's software on a home system some help would be appreciated. Do I need to move some files from somewhere? Help! I really don't want to have to go back to developing on Windows as I'll be deploying to a lamp system, my learning curve will be steep.

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  • How Can I Map IIS on My PC with Static IP to my Domain Name?

    - by Subhen
    Hi, Now I have got an internet connection with Static Ip. I want to know How can I map my website to my Static IP(Received from ISP). I know this is not a good Idea for Security and Performance issues, But just Wanted to know as I can set up a test Project. Again, Can't I just by a domain name and map it to my Static Ip, instead of buying them from WebHosting Providers. Now I have bought the space from bizzhost and hosted my site by setting the Name Server. Thanks, Subhen

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  • Terratec Cinergy Hybrid T USB XS is not recognized anymore on Mac OS X

    - by Gabble
    I have used Terratec Cinergy Hybrid T USB XS for years now, alongside with Elgato EyeTV software. I am a happy and completely satisfied user! Since a couple of weeks the USB sitck stopped working on my MacPro1,1 (OS version 10.6.3): EyeTV does not see any device attached, and actually, the green led on the stick stays off. It is not a USB port fault: I have unplugged any other USB/Firewire device and tried with different USB ports, to no avail (any other USB devices work as expected on any port) I have completely uninstalled EyeTV software, including preferences and system daemons/extensions, rebooted and reinstalled the latest EyeTV. No way. Reset the PRAM. Nope. Checked the Apple System Profiler - USB: No device attached, The MacPro does not see it at all. I need to say that: a) The device worked as a charm even with the latest OS 10.6.x (so it's not a OS upgrade cause). b) I have plugged the Terratec Cinergy Hybrid T USB XS to my MacBook5,1 where EyeTV is not installed and was never installed: The green led on the stick turns on, the growl bubble pops up, and the device is perfectly recognized by the system. Apple System Profiler says (sorry, Italian language): Cinergy Hybrid T USB XS (2882): ID prodotto: 0x005e ID fornitore: 0x0ccd Versione: 1.10 Numero di serie: 061102005755 Velocità: Fino a 12 Mb/sec Produttore: TerraTec Electronic GmbH ID posizione: 0x04100000 Corrente disponibile (mA): 500 Corrente necessaria (mA): 500 At this point I am pretty sure the Terratec stick is not damaged and there is something wrong with my MacPro. I kindly ask you: Is there a way to force my MacPro recognize the USB device? What can I check? Is there something that caches USB connection that can be reset? A OS reinstall would be the very last resort for me. Thanks in advance for any help you will offer!

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  • Is it possible/advisable to run VMware Server ESX/ESXi on a laptop?

    - by cletus
    The idea of having a small footprint hypervisor as the primary OS on a laptop or desktop where every "real" OS is a guest appeals to me. Now I realize this software is more typically used on blades and the other servers but can it be done on a normal PC? Should it be? What requirements are there (eg hardware/BIOS/chipset)? Is there a performance impact for doing so? Is it a good/bad idea?

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  • Slow WLAN file transfer between server and tablet

    - by user266985
    My file server is running Ubuntu 12.04 and I'm sharing files from it over samba. It is connected via gigabit ethernet. My desktop, running Windows 8.1, is also connected via gigabit ethernet. I can transfer files between the two and completely saturate that gigabit pipe. However, I just got a Surface Pro 2, and I'm trying to stream HD movies from my server to the device over WiFi. For some reason, I can't break much past 1.5MB/s transferring files over the network. I've tried streaming through XBMC and a standard file copy; no difference. To add the confusion, if I connect to my guest network and then use my VPN server (installed on the router) to access the file server, I get around 3.2MB/s. I've been running diagnostics to determine the root and I think I've found it but I have no idea what is causing it or how to fix it. Router: Asus RT-N66U Surface Pro 2 Network Card: Marvell Avastar 350N (Driver 19/09/2013 v14.69.24044.150) InSSIDer: Link Score: 100 Co-Channels: 0 Overlapping: 0 5GHz Network Channel: 48+44 iperf File Server as Server; Surface Pro 2 as Client - TCP Performance: Acceptable ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.0.90 port 5001 connected with 192.168.0.56 port 57367 [ ID] Interval Transfer Bandwidth [ 4] 0.0- 1.0 sec 10.1 MBytes 84.7 Mbits/sec [ 4] 1.0- 2.0 sec 10.4 MBytes 87.6 Mbits/sec [ 4] 2.0- 3.0 sec 10.6 MBytes 88.8 Mbits/sec [ 4] 3.0- 4.0 sec 10.7 MBytes 89.5 Mbits/sec [ 4] 4.0- 5.0 sec 10.1 MBytes 84.4 Mbits/sec [ 4] 5.0- 6.0 sec 10.2 MBytes 85.8 Mbits/sec [ 4] 6.0- 7.0 sec 7.04 MBytes 59.1 Mbits/sec [ 4] 7.0- 8.0 sec 10.8 MBytes 90.2 Mbits/sec [ 4] 8.0- 9.0 sec 10.6 MBytes 89.1 Mbits/sec [ 4] 9.0-10.0 sec 8.62 MBytes 72.3 Mbits/sec [ 4] 0.0-10.0 sec 99.2 MBytes 83.1 Mbits/sec iperf Surface Pro 2 as Server, File Server as Client Performance: Poor ------------------------------------------------------------ Client connecting to 192.168.0.56, TCP port 5001 TCP window size: 22.9 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.0.90 port 40233 connected with 192.168.0.56 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 1.50 MBytes 12.6 Mbits/sec [ 3] 1.0- 2.0 sec 1.50 MBytes 12.6 Mbits/sec [ 3] 2.0- 3.0 sec 1.50 MBytes 12.6 Mbits/sec [ 3] 3.0- 4.0 sec 1.25 MBytes 10.5 Mbits/sec [ 3] 4.0- 5.0 sec 1.62 MBytes 13.6 Mbits/sec [ 3] 5.0- 6.0 sec 1.50 MBytes 12.6 Mbits/sec [ 3] 6.0- 7.0 sec 1.38 MBytes 11.5 Mbits/sec [ 3] 7.0- 8.0 sec 1.50 MBytes 12.6 Mbits/sec [ 3] 8.0- 9.0 sec 1.50 MBytes 12.6 Mbits/sec [ 3] 9.0-10.0 sec 1.62 MBytes 13.6 Mbits/sec [ 3] 0.0-10.1 sec 15.0 MBytes 12.4 Mbits/sec For some reason, it gets capped and I haven't got a clue why. Any suggestions? Edit: My link speed is reported as 270Mbps by Windows. I'm less than two metres from the router with a clear line of sight.

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  • Windows 2003 X64 Std page file usage

    - by duhaas
    Just trying to understand why I'm seeing what I'm seeing on this system. Pagefile performance counters are telling me i'm @ about 1.5% used with my page file, settings for the file are 2GB-4GB, but task manager was showing 13GB usage: Oddly enough, it just sunk down: This machine has IBM DB2 9.5 workgroup edition running on it. Thoughts??? Actually, just learned the developer had just stopped DB2, hence the huge drop, just not understand the difference in the PF usage in task manager vs perf counters?

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  • How to disable Utility Manager (Windows Key + U)

    - by Skizz
    How do I disable the Windows + U hotkey in Windows XP? Alternatively, how do I stop the utility manager from being active? The two are related. The utilty manager is currently providing a potential security hole and I need to remove it[1]. The system I'm developing uses a custom Gina to log in and start a custom shell. This removes most Windows Key hotkeys but the Win + U still pops up the manager app. Update: Things I've tried and don't work: NoWinKeys registry setting - this only affects explorer hotkeys; Renaming utilman.exe - program reappears next login; Third party software - not really an option, these machines are audited by the clients and additional, third party software would be unlikely to be accepted. Also, the proedure needs to be reasonably straightforward - this has to be done by field service engineers to existing machines (machines currently in Russia, Holland, France, Spain, Ireland and USA). [1] The hole is via the internet options in the help viewer the utility app links to.

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  • How do I setup a proper VPN for my friends to play LAN games AND give them internet access?

    - by Gizmo
    I'm trying to setup a VPN on my local network, but everyone who connects to me DOES have access to my laptop but not to the internet or other devices on the network. How can I properly configure my VPN on windows to work correctly (giving internet + access to all devices on my network to the remote pc)? Or is there software on windows which makes creating a VPN server easier? or maybe a VMWare image linux vpn server? I can't find any of those! My requirement is that my friends don't have to install additional software, they have to be able to connect with default windows stuff. My OS is Windows 8 Standart edition (not pro or enterprise) OEM. Most of my friends have also windows 8, some windows 7. Extra info: My device is DMZ'ed (Demilitarized Zone, [disabled NAT on my device so it's accessible on the WAN]) I can access files, websites and services on other devices on my network, and all devices can access file shares, website and all other services on my device When enabling VPN everything works except the client is unable to get internet access or access to any device on my network, client has only access to my device.

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  • Safe to disable compile options for Nginx (when used only as reverse proxy/cache)

    - by Alex
    I have read that I can do this to make a smaller footprint Nginx when used as static content cache/reverse proxy: --without-mail_pop3_module --without-mail_imap_module --without-mail_smtp_module What other options are safe to disable? SSI, FastCGI? Others? The only requirements for the reverse proxy is to be able to do https and gzip compression. Will disabling all the module really help with footprint and/or performance?

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  • Restore a database with LDF file only

    - by Martin
    First of all, i know how stupid it is not to have a any backup. I can't help it, but i have to (try) to solve it. I have a transaction log (LDF) file from a SQL Server 2000 database that contains all transactions since the creation of the database. No truncation has been done. The MDF file is gone. Probably because of some disk failure. There is no backup. Not from the original database and not from the transaction log. I have tried to link the transaction log to a new clean database. But (ofcourse) that failed because SQL Server checks the identity of both files. I have read about software that can read the transaction log. ApexSQL seems to do that. I tried to install the trial version but it gives weird errors when trying to start the program. Anyone knows a solution for me? It may contain third party software, but i prefer a clean SQL Server solution.

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  • Can a OS be copied from one hard drive to another and still boot?

    - by AlexMorley-Finch
    Background My computer gets stuck on the make and model screen after the BIOS screen, aka the Toshiba screen. After some research I've realized that the problem is the hard drive. I'm using an old 250gb model that USED to be used for backup purposes, however I loaded windows 7 ultimate onto it This hard drive has trouble getting up to full RPM therefore cannot boot correctly until its warmed up. meaning that my pc needs to be restarted several times before it boots (once it took my 13 reboots to get my pc on!) From my research its either that, or lack of power supply, and I've tried multiple PSUs. Question I have my OS and all my files on this 250gb HDD... If I were to literally open the explorer, and copy EVERYTHING (including hidden files obviously) from this 250gb, to a spare 500gb I've got knocking about... Will it boot if I just copy everything? I cannot be bothered to load another OS onto my PC so if there is a way I can just copy the existing one over from one HDD to another and have it boot normally. This would be epic! I've heard about HDD cloning software. But before I purchase and/or download this software, I need to know if i can just copy the OS over through the windows explorer

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  • What are the typical methods used to scale up/out email storage servers?

    - by nareshov
    Hi, What I've tried: I have two email storage architectures. Old and new. Old: courier-imapds on several (18+) 1TB-storage servers. If one of them show signs of running out of disk space, we migrate a few email accounts to another server. the servers don't have replicas. no backups either. New: dovecot2 on a single huge server with 16TB (SATA) storage and a few SSDs we store fresh mails on the SSDs and run a doveadm purge to move mails older than a day to the SATA disks there is an identical server which has a max-15min-old rsync backup from the primary server higher-ups/management wanted to pack in as much storage as possible per server in order to minimise the cost of SSDs per server the rsync'ing is done because GlusterFS wasn't replicating well under that high small/random-IO. scaling out was expected to be done with provisioning another pair of such huge servers on facing disk-crunch issues like in the old architecture, manual moving of email accounts would be done. Concerns/doubts: I'm not convinced with the synchronously-replicated filesystem idea works well for heavy random/small-IO. GlusterFS isn't working for us yet, I'm not sure if there's another filesystem out there for this use case. The idea was to keep identical pairs and use DNS round-robin for email delivery and IMAP/POP3 access. And if one the servers went down for whatever reasons (planned/unplanned), we'd move the IP to the other server in the pair. In filesystems like Lustre, I get the advantage of a single namespace whereby I do not have to worry about manually migrating accounts around and updating MAILHOME paths and other metadata/data. Questions: What are the typical methods used to scale up/out with the traditional software (courier-imapd / dovecot)? Do traditional software that store on a locally mounted filesystem pose a roadblock to scale out with minimal "problems"? Does one have to re-write (parts of) these to work with an object-storage of some sort - such as OpenStack object storage?

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  • How can I use my built-in AMD Radeon 7670m instead of Intel HD 4000 Graphics?

    - by gururaj
    i recently bought a DELL Inspiron 15R 2012m Series Laptop. It comes with a built-in AMD Radeon 7670m graphics card. I installed PES 2012, when I checked the system specification (an option in that PES 2012 game ). I came to know that game runs with Intel HD4000 Graphics and not with my AMD card. I also changed the swithchable graphics and assigned High Performance to PES2012, but the game still runs on Intel HD4000.

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  • Get statistics on how ReadyBoost is being used by Windows

    - by TomA
    I have experimentally started using a flash drive for ReadyBoost. There's no blinking light on it so I don't even know if it's being accessed at all. Is there some way to get statistics on how often or how well Windows actually uses the drive to improve performance? Something like numbers of cache hits/misses or something...

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  • Windows 7 PC freezes frequently with hard disk light constantly on

    - by Senthil
    I recently replaced a defective hard disk with a new one - Windows 7 - "A disk read error occured. Press Ctrl + Alt + Del to restart" I have been using the new hard disk with a Windows 7 installation for about 4 days. Now it has started freezing frequently. Sometimes every 2 minutes and sometimes every 10 seconds. There is lots of software installed - I am a developer and my PC is full of IDEs, database servers, web servers, developer tools, testing tools, all browsers etc.. My windows is up to date as of now. I have installed ALL updates including optional drivers etc. All my installed software is up to date. I scanned my computer using Microsoft Security Essentials and found nothing malicious. I did a chkdsk /r and found no problems. I did a memory diagnostic and found no problems. When I go into safe mode, it doesn't freeze and I am able to use it normally for longer periods of time. What other steps can I take to locate the problem?

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  • Hard drive causing BSOD

    - by JoshIrving
    I've come across a problem after building my new PC and installing a clean Windows 7. I originally planed on a RAID 1 or 0 but after further research I decided against it. So I was left with two 1TB Western Digital Black SATA 6Gb/s hard drives. My plan now was to use my second hard drive as a backup (using Windows Backup or 3rd party software). I set both hard drives to AHCI in the BIOS and installed Windows 7. I went through the lengthy process of downloading and installing each driver manually (latest versions), using the motherboard disk for a list of what I need. After a few restarts and before installing any software, I took an image backup onto DVD and the second hard drive. First witnessed the problem during the first scheduled Windows backup. The progress bar froze at about 70% (doc backup done, image backup in progress). It stayed still for 2 hours until it blue screened. Next time the backup froze, I tried shutting down. It logged me out and got stuck at the last step ("Shutting down" and blue spinner) for an hour, until I hard shutdown. I later realised this hasn't got anything to do with the backup. I ended up blue screening on almost every shut down (same place). Turns out, it's because of the second hard drive spinning down or turning off. The computer will now shutdown properly, as long as I remember to read or write to the second drive before executing shutdown. I've now set "Turn off hard disk after: Never" - No problems, so far. Do I have dodgy hard drive(s) or should I investigate the POWER_STATE_DRIVER_FAILURE BSOD - can it be a driver issue? AHCI?

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  • Oracle Virtualbox on statically compiled kernel

    - by aking1012
    I can't seem to find any documentation on the subject. I'm working on putting together a linux install for a fairly "dirty" environment. Best practice there would be a statically compiled kernel with no module support. I can already do the customizations to strip out unnecessary drivers/etc to get the performance and disable module support. Does anyone have a link or any ideas on how to get the Oracle Virtualbox module (not the OSE one, I need USB passthrough) compiled in?

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  • Why is my computer using so much ram?

    - by Ian
    I have 16gb of ram installed in my computer, and nearly 70% of it is used at all times. Looking at the processes in task manager the memory being used with everything in there doesn't even add up to 2gb. I have RAPID mode enabled on my ssd which may be using 2gb at most so I would understand that. I am thinking there might be a memory leak somewhere, but I don't really know how I would be able to tell. My performance and process list is below:

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