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  • ZFS on top of iSCSI

    - by Solipsism
    I'm planning on building out a file server using ZFS and BSD, and I was hoping to make it more expandable by attaching drives stored in other machines in the same rack via iSCSI (e.g., one machine is running ZFS, and others have iSCSI targets available to be connected to by the ZFS box and added to zpools). Looking for other people who have tried this has pretty much lead me to resources about exposing iSCSI shares on top of ZFS, but nothing about the reverse. Primarily I have the following questions: Is iSCSI over gigabit ethernet fast enough for this purpose, or would I have to switch to 10GbE to get decent performance? What would happen when one of the machines running iSCSI targets disconnects from the network? Is there a better way to do this that I just am not clever enough to have realized? Thanks for any help.

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  • Whats the best way to deal with backups for my php/mysql application

    - by spirytus
    I'm creating php application for my client and now thinking what would be the best way to do backups, automatically if possible? I don't have much experience in this area and in case something goes wrong, or if I need to migrate, I would like to have fast way of getting it all back online. I understand "something goes wrong" is a very wide term, but lets say that someone hacks my site and wipes out database and all the files. My app. is written in php/mysql and I got access to cpanel (hosted with justhost.com if that makes any difference :). I used Joomla and it has JoomlaPack that does complete backup almost automatically and in case site fails, its easy to revert, or migrate if necessary. Is there anything like that for my configuration that would make reverting/migration, easy?

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  • Add users in Windows machine without AD

    - by guillem
    I have several development machines where I am the administrator. We are using AD in my organization but is maintained by and offshore IT group any request takes a long time. We are currently granting access to developers on development machines manually so it's a bit annoying to maintain although at least it's fast. We have also a lot of external consultants that need to use those machines for some time. Is there any tool or method to maintain a set of users synced on those machines without the need add them to an AD group?

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  • Moving files with batch files from one pc to a server, to a another pc - worried about disk corruption

    - by AnchientAnt
    I use scheduled tasks that calls a batch file, that calls more batch files to move about three files from a pc, to a server, then to multiple other pcs. It all happens very quickly, as they are small files. Are there any pitfalls for how fast these transfers happen? I'm just mildly concerned about causing some disk corruption somehow. I use logic like 1. Call MapToPc if files exist then move file to folder on server. Disconnect 2. Call SendtoPCs If files exist (the files just moved to the server) then MapToPCs Move all files Disconnect All of this happens in about 2 secs or less. edit: this on windows 7, server 2003, xp respectively

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  • I try to access a NFS mount via FTP. It works but the FTP Dir listing is very slow

    - by W0bble
    I mount an NFS using this command: mount -o rsize=8192,wsize=8192,timeo=14,intr serverip:/directory /mnt/directory However the mount appears on the client as expected a cmd like "ls -a" work pretty fast on the nfs mount. But when I try to list the mounted directory via FTP it gets very very slow ( 1.250 bytes in 160,39s (0,01KB/s) ). But surprisingly downloading files via FTP from nfs work with normal speeds. I tested several values for rsize and wsize parameter with no success. Both client and server are running Debian squeeze and NFSv4

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  • Iptables rules make communication so slow

    - by mmc18
    When I have send a request to an application running on a machine which following firewall rules are applied, it waits so long. When I have deactivated the iptables rule, it responses immediately. What makes communication so slow? -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT -A INPUT -p esp -j ACCEPT -A INPUT -i ppp+ -j ACCEPT -A INPUT -p udp -m udp --dport 500 -j ACCEPT -A INPUT -p udp -m udp --dport 4500 -j ACCEPT -A INPUT -p udp -m udp --dport 1701 -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -i lo -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 -A FORWARD -i ppp+ -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT

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  • RDC not working from outside

    - by Cotten
    I've set up Remote Connection according to : http://windows.microsoft.com/is-IS/windows7/allow-remote-desktop-connections-from-outside-your-home-network That is, Allow remote connections to the computer you want to access. Make sure Remote Desktop is able to communicate through your firewall. Find the IP address of the computer on your home network that you want to connect to. Open your router's configuration screen and forward TCP port 3389 to the destination computer's IP address. Find your router's public IP address so that Remote Desktop can find it on the Internet. When I'm inside the LAN, RDC works flawlessly. When I try to connect to the ip given by my ISP it cannot connect. I've setup port forwarding for 3389 on my netgear router. Thanks!

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  • Sharing files between centOS on virtualbox and windows 7 as the host

    - by Wasswa Samuel
    I have centOS 5.5 installed on virtual box it has no GUI so every thing is command based. I want to make a folder in centOS which i can share with my windows 7 host OS such that i can send files to and fro seamlessly. I am new to linux and i managed to install samba. I looked up some tips on net but i ended up getting confused and none of them worked. Can someone explain to me how i can do this in a straight forward way from how i can configure samba to how i can mount the folder such that it can be seen on the host operating system. I am completely lost.please help.

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  • Time of splitting and encoding video with ffmpeg increases exponentially

    - by Rnd_d
    I'm trying to split video by subtitles and encode into .mp4(h.264/aac) using ffmpeg, but it takes so much time! First pieces of video are splited and encoded really fast, but for each iteration time increases, and so 40 min video takes all night or more. Small 3 min video takes max 10 mins. cmd for splitting and encoding: ffmpeg -i filename.avi -ss 00:00:0(time of sub start) -t 0:0:3(time of sub duration) -acodec libfaac -vcodec libx264 -bf 0 -f mp4 filename.mp4 ffmpeg version N-34849-g07c7ffc (last, i think) How I can make it faster? Are there, maybe, some magic arguments for ffmpeg or some hacks?

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  • Firewall is blocking internet traffic to OpenVPN clients

    - by user268905
    I have a virtual network setup with a Linux router/firewall connected to two private networks. An OpenVPN server in routing mode and a web server are in one of the networks. On the other are linux client machines which access the webserver and the Internet through the OpenVPN server. Also, external clients can access the OpenVPN from the Internet. The OpenVPN's server.conf is setup to use routing mode in udp, push DNS and routes to the network it is in so clients can access the webserver. Here are my very strict firewall rules. After connecting to the OpenVPN server, my clients can not access the Internet or the web server. When I allow FORWARD traffic to go through, it works just fine. The OpenVPN server has full internet connectivity. What firewall rule do I need to add to allow internet traffic to reach my clients?

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  • Data transfer is extrem slow after partitioning extern usb drive

    - by user125912
    I bought an extern usb 3.0 drive with 500 gb capacity. OS is Windows 7. I use it with an usb 2.0 slot, no prob. Initially I used it without making several partitions and it was fast as hell. Then I had the great idea to make partitions, one for programs, one for data and one for backup. I chose the free EASEUS Partition Master 9.1.1. and ended up with these partitions: F:Apps, primary, NTFS, 100gb H:Data, logic, NTFS, 250gb B:Backup, logic, NTFS, 150gb THE PROBLEM: When I copy files from C: to F: I get a transfer rate of about 100 KB/S ! When I copy files from C: to H: I get a transfer rate of about 4 MB/S ! thats all muuuch to slow, slower then before. What can I do to speed the shit up? Thanks in advance!

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  • Windows 8 switch user is very slow

    - by Chris Weber
    I recently upgraded to Windows 8 from Windows 7. One major annoyance is how slow the "switch user" command is. In Windows 7 switching users was fairly fast. I've got an SSD drive with pretty good hardware, so I'm suspecting it's something with Windows 8, either a defect, or the fact that I upgraded from Windows 7 instead of doing a clean install. Anybody have this problem? My wife is complaining enough about Windows 8 and this is one of the biggest complaints.

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  • Applications starts very slowly from a network path

    - by Snowfox
    Hi We have a windows 2008 server which hosts the network share \\srvcompany\lib. This share contains several applications needed for the daily business. Every client/user (all win xp) has shortcuts on the desktop to these apps. We have the problem that at several (but not all) clients the apps starts very slowly. If I copy the application's programm files to a local folder then they'll start fastly. When I watch the memory usage in the task manager on such a "slow" machine while an applications starts I notice that the memory usage grows much slowier than when I start the app from a "fast" machine. But when I copy files with Windows Explorer from this share, the speed is nearly the same. I've also checked the network driver, both tested clients have the same network card with the same driver version. Has anyone an idea where or what I should check next to solve this problem? Thanks for answers.

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  • netgear GS108TV2 RSTP configuration

    - by jhowland
    I have a large set of GS108TV2 units--my goal is to set up a network which is comprised of several loops for redundancy/fault tolerance. I have a minimal 3 switch loop configured, with RSTP enabled on two ports on each switch. I have my bridge max age set to 6, and my bridge forward delay set to 4, which are the minimum values allowed. Hello time is fixed at 2 seconds. The switches respond to a cable being removed from a socket, but it takes too long. I cannot get the switch to respond to a loss of connection on one of the redundant ports in less than 20 seconds. Is there any way to configure these switches to respond faster than 20 seconds? That is unacceptable for my application. thanks in advance for any help

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  • windows 7 (windows-system32-systemproperties.exe n) need programme elevation message

    - by mohammedjas
    hi, i have the issue with windows 7 32-bit professional, since this is a network computer, when i download or install something it was asking for admin password , i gave password, then its shows programme need elevation , after i gone to my computer-properties-advanced tap - again the same message displays as windows-system32-systempropertiesadvanced.exe need programme elevation .this same message showing in all eg: if i click to install something wind/sys32/isyspropertiesins.exe progrmme need elevation , also i was not able to add or change somthing in the computermanagement, user or group , says some error , even i logged in admin also,, please help me out with good soluton ..i am looking forward reply , as soon as possible. regards, mohmmed

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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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  • Trying to reinvent the wheel of StackOverflow to have a good learning experience. Need some suggesti

    - by Legend
    I want to learn and am not able to do it unless I have a real "mission" to complete. SO is my favorite and I can't imagine a better experience than actually recreating it but not in ASP. I'd like to use PHP+MySQL+jQuery. So far, I have been a self-taught programmer but I would like to master one paradigm that forces you to adhere to the standards. For instance, recently, jQuery forced me to use some "rules". The plugins were supposed to be written in a particular way and that's it. When I started off, everything seemed like Greek and Latin but when I finished a very small plugin, I felt really happy because it forced me to program in a certain way. I am looking for something like this only in a larger project. I've heard a lot about MVC and all but I am confused about the various frameworks out there. Zend seems awesome but looks heavy at the same time and also requires you to have a lot more control over the web-server whereas CakePHP is a good and a fast framework that needs only little control. Do I use one of these or just write my own MVC? I have the following goals: Goals: Site should be fast - I know this depends on my coding skills but I will learn on my way. The framework itself should not slow me down) Setting up the site should not require you to use command-line - This requirement is ok during development. But some frameworks like Symphony require you to initialize certain things through command-line Should support pluggable modules - For instance, if I want to be able to use the FCK editor, I should be able to organize things in a good way. Should be possible to extend - For instance, SO is mainly a Q&A site but I should be able to logically extend it into an Idea Management System (optional but I'm curious). This goes more into code re-usability I guess. I am comfortable with MySQL so I should be done with database design etc. with some serious effort. As for PHP, I can write code on my own but haven't really used any frameworks that much. jQuery, I started off recently and love it. I would be glad if someone can guide me during these initial steps. Precisely, when designing something like SO, I have the following questions: Do I use a framework? If yes, should it be MVC? If MVC, which one is a good and a scalable one? (I'd love something like jQuery that will not die anytime soon) How do I balance the functionality? The same logic can sometimes be made server centric or client centric. (more Ajax?). Is it a good idea to make a heavy javascript site considering the recent advances on client-side JS processing? Just in case anyone is wondering, I am not interested in commercializing any of this. I need a reason to learn something :)

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  • Windows 7 System Image Restore to SSD - SSD not detected?

    - by steviey
    I recently bought a new SSD (OCZ Vertex 2 120GB) as a replacement for my laptop HDD . I created a System Image on an external drive using the Win 7 backup and restore tool and then restored this image to the SSD using the Win 7 disk. AHCI is enabled in Win 7 and the BIOS, but it seems that windows is not detecting the disk as an SSD because, in the defragger, the disk is still available for defragging. Prefetch and Superfetch were also still enabled. I have manually disabled scheduled defragging, prefetch and superfetch. I have also checked that TRIM is enabled using: fsutil behavior query DisableDeleteNotify and the result is '0' (it is). Performance seems ok, but not quite as fast as I expected. Was restoring from a win7 generated system image a mistake? Am I getting optimal SSD performance?

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  • How to play multiple videos side-by-side synchronized?

    - by Don Salva
    I've got 3 videos, all 3 have the same time, same amount of frames, and they only differ in terms of encoding quality. Now I need them to run side-by-side in synchronized fashion for evaluation purposes. Meaning when I press "play" BOTH! videos should start. Analogically for stop, forward, backward. Anyone know any player capable of doing that? By that I mean playing more than 1 video side-by-side... Platform: Win7

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  • Opening ports with IPTables not working - Ubuntu

    - by user41416
    So, I have these rules set in iptables: # iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp dpts:6850:6999 ACCEPT udp -- anywhere anywhere udp dpts:6850:6999 ACCEPT tcp -- anywhere anywhere tcp dpt:6881 Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Although, the ports are not open :/ here is a telnet attempt: # telnet localhost 6999 Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused Any idea why this is happening? Do I need to reboot or do someone to make the changes permanent? Last time I rebooted the rules disappeared from iptables :/

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  • Is there any trick to join and use Windows 8/8.1 with Samba 4 (4.1.6)?

    - by tenshimsm
    It seems that Samba doesn't like at all. I've followed various tutorials and I can't get Windows 8 to work properly with a Ubuntu Server as domain controller. This week i've downloaded ubuntu 14.04 lts and set a fast domain configuration. As usual all other Windows version (XP and 7) work but the newest M$ nightmare doesn't. In this try it doesn't even join the domain, keeps saying the my username or password are wrong. My /etc/samba/smb.conf # Global parameters [global] workgroup = DOMAIN realm = DOMAIN.LAN netbios name = DOM server role = active directory domain controller dns forwarder = 8.8.8.8 idmap_ldb:use rfc2307 = yes [netlogon] path = /var/lib/samba/sysvol/domain.lan/scripts read only = No [sysvol] path = /var/lib/samba/sysvol read only = No [test] directory mode = 0750 path = /SHARES/test read only = no Does anyone have a tutorial that really works? Because I've tried many, each one with different configurations that works only with the people that made them. And is there a way to import my old AD users, computers and ID in a way that I won't need to rejoin all computers?

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  • Fix X11 forwarding on OSX

    - by Such
    I am looking for a way to fix/debug a X11 forwarding session on OSX. Here is my situation: From my mac I connect to a Ubuntu workstation with ssh -X (tried ssh -Y as well). X11 forwarding works perfectly with firefox for instance, X11/Quartz is started automatically on OSX and firefox is displayed. X11 forwarding does not work with bat (Bacula graphical console): X11 is started but no window is displayed. There are no errors (/private/var/log/system.log). When I try doing the same from another Ubuntu workstation, it works perfectly for both firefox and bat. I guess the problem is on OSX side then. I tried switching some options in X11 but nothing works. Would you have any idea on how to move forward? Thanks!

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  • VirtualBox: Ubuntu installed in Windows 7 OR Windows 7 installed in Ubuntu

    - by user584968
    The title of the post sums up my questions: Is performance better, on average, assuming Ubuntu and Windows are used equally and for the same purposes, when Ubuntu is installed inside of Windows 7 or when Windows 7 is installed inside of Ubuntu using VirtualBox? My gut instinct tells me that because Ubuntu drivers are mostly open source, optimizations could be made when translating the virtual system calls of Ubuntu through Windows 7 that could not be made if it were flipped the other way around, because of the closed nature of Windows drivers. However, this is just a guess, and I have no evidence to back this up. I'm not sure, so I thought it would be best if I opened up this question to the experts of the community. I look forward to reading your responses!

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  • Route gaming data over wireless and everything else through LAN?

    - by Alex
    I have two internet connections available to me. One is via LAN.. not a great ping, but fast downloads. The other is via USB wireless adapter.. good ping, but slow downloads. I want to connect to both of them simultaneously. I want to be able to specify which data or application will use the wireless connection and route everything else through the lan connection. Is this possible, and how would I do it? Windows 7 x64 is my operating system. Here is the data from route print: http://pastebin.com/vsjQRpSM I'm still unsure of how to use this to make all of my data go through the nvidia lan interface, even after reading route /? Also, if I'm able to achieve that, will it override the ForceBindIP?

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  • How to prevent windows 7 shutdown/lock/logoff?

    - by user507993
    Hi, guys In my company staff have to check in after retch to company and check out before leave company on a internal site, sometimes I forget it totally...it's awful. Now i want a program which shows a prompt window when lock/logoff/shutdown, in this way i won't forget any more. Indeed i develop a program (some words and two buttons), and configure this program started when lock/logoff/shutdown in group policy, here is the question: how can i prevent my windows 7 shutdown/logoff/lock? it means i click the button "yes, i want" my pc still running and chrome or something showed up, if i click the button "no, thanks", my pc will shutdown/logoff/lock. please help, thx! i am looking forward to you. ps: i am not good in english, hope you understand. thx again!

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