Search Results

Search found 26798 results on 1072 pages for 'difference between detach attach and restore backup a db'.

Page 902/1072 | < Previous Page | 898 899 900 901 902 903 904 905 906 907 908 909  | Next Page >

• File Open/Save Dialog always 'Not Responding'

  - by Amanda

  I am aware that this question has been asked once, however the solution for them didn't work with me. Whenever I go to open/save a file in any program, the dialog does not come up, and the application goes to 'Not Responding'. This goes on for about a few minutes, and then stops, but still does not open the dialog. There have been a few occasions where the dialog has suddenly worked for a while, but then the problem comes back. I have tried many solutions given around the internet, I have cleaned it with CCleaner, disk defragged it, sorted the index. Nothing works. Is there anybody who has any idea what the problem is? This is Windows Vista. I'm not quite sure what kind of information you guys would need about my laptop, but I'll give you it if you need it. :) Solutions I have Tried: I have tried deleting the 'Shellicon' folder in the registry, which wasn't even in there. I have looked for mapped network drives lingering around, and I haven't come across any. I have tried rebuilding teh Widnows Search Indexes...no difference.

  Read the article

• Freebsd jail for an small company - checklist - what shouldn't forget

  - by cajwine

  Looking for an checklist for an "small company freebsd/jail server". Having pretty common starting point: FreeBSD jail (remote/headless) for the company: public web, email, ftp server, and private (maybe in the future partially public) wiki (foswiki) 4 physical persons, (6 email addresses) + one admin - others will never use ssh) have already done usual hardening on the host side (like pf, sshguard etc). my major components are: dovecot, exim, apache22, proftpd, perl5.14. Looking for an checklist, what I shouldn't forget. My plan: openssl self-signed certificates for exim, dovecot and proftpd (wildcard keys) openssl self-signed certificate for apache (later will go for "trusted-signed" key) My questions are: is is an "good practice" having one pair of wildcard SSL-certificates for many programs? (exim, dovecot, proftpd) - or should I generate one key for each service? should I add all 4 persons as standard (unix) users, or I should go with virtual users? Asking because: have only small count of users, and it is more simple to configure everything (exim, dovecot) for local users ($HOME/Maildir), plus ability to set $HOME/.forward/vacation and etc. is here some (special) things what I should consider? (e.g. maybe, in the future we want setup our own webmail - will make this any difference?) any other recommendation? Thank you, hoping that this question fit into the http://serverfault.com/faq under the: Server and Business Workstation operating systems, hardware, software Operations, maintenance, and monitoring Looking for an checklist, but please explain why you're recommending it. See Good Subjective, Bad Subjective. related: What's your suggested mail server configuration for a FreeBSD server?

  Read the article

• How can I remove all drivers and other files related to a USB Mass Storage device?

  - by Bob

  I have a flash drive here that does not work on one OS on computer - let's call it the desktop Windows 7. It works fine on another computer - laptop Windows 7. It also works fine on Windows 8 on the same desktop computer. Other flash drives work fine under desktop Windows 7. So not a hardware issue, not a generic USB Mass Storage driver issue. It's something specific to this drive. On desktop Windows 7, I can connect the drive but no volume comes up under Windows Explorer. Ditto for Disk Management. With diskpart, loading hangs until I unplug the drive, if I replug it and try list disk it hangs again. If I unplug the drive at this point, list disk prints out all attached drives - including the just removed flash drive. The drive consistently appears under Device Manager, but uninstalling the drivers, restarting and reinstalling the drivers (by inserting the drive) only works for the first insertion. After that it fails again. I get the feeling that the driver files are not actually removed, and are corrupted, meaning every reinstall it's the same corrupted drivers being installed. Is there any way to remove these drivers completely? Or perhaps some other setting Windows 7 retains? Formatting the drive through another computer/OS does not help. I've also tried a complete wipe and rebuild of the MBR and single partition. The allocation unit size makes no difference; neither does a NTFS format. This is a relatively small matter, and I would not like to reinstall the entire OS!

  Read the article

• ubuntu preseed installation keep missing mirror files

  - by JackWu

  Install ubuntu12.04.2 with preseed file, but there is one buggy problem about preseed mirror setting. The symptom here is installing process got stuck. So I track down the log file, and find out the real problem, the installation is looking for a file that's not there. This is just one of them, another pops up if I faked this file. This all happened during preseed, so I believe preseed has something to do with this. I google ubuntu preseed mirror and find this post saying: # If you select ftp, the mirror/country string does not need to be set. #d-i mirror/protocol string ftp d-i mirror/country string manual d-i mirror/http/hostname string archive.ubuntu.com d-i mirror/http/directory string /ubuntu d-i mirror/http/proxy string # Alternatively: by default, the installer uses CC.archive.ubuntu.com where # CC is the ISO-3166-2 code for the selected country. You can preseed this # so that it does so without asking. #d-i mirror/http/mirror select CC.archive.ubuntu.com # Suite to install. #d-i mirror/suite string lucid # Suite to use for loading installer components (optional). #d-i mirror/udeb/suite string lucid # Components to use for loading installer components (optional). #d-i mirror/udeb/components multiselect main, restricted I wonder the difference between d-i mirror/http/hostname and d-i mirror/http/mirror, I mean they all specify a mirror, right? In my preseed file, this is no d-i mirror/http/mirror, and d-i mirror/http/hostname points to my own repo as you might notice in the previous image. Here is my question: Does preseed fetches file/resource from internet, if I use local repo? Why it's looking for file that's not even there? This has bothered for quite time, many thanks in advance to anyone who might give any help.

  Read the article

• Terminal emulation has stopped working. Garbage escape chars

  - by oligofren

  To enable me to do some remote administration of our servers I started using a terminal emulation program called TouchTerm Pro on my iPhone. While not the smoothest experience, it has allowed me to leave my computer behind when going out of town, which makes the slightly painful experience worthwhile. As of late, the app unfortunately no longer works. Pressing up and down keys after logging on via ssh gives me garbage like ^[[A and ^[[B. Combinations with Ctrl - like you can see in the video - no longer works either. Writing full command lines and executing by the enter key works though. Being able to search my bash history was the difference between a usable app and endless frustration, so getting it to work is essential. The app has (of course) met its end of life, not getting updated anymore. I am not quite sure, which side (client or server) that has to be "fixed"/hacked to make the control sequences work again. But is there something I can do to make it work as intended? You can see a video of TouchTerm in operation here.

  Read the article

• Package pinning in Debian lenny

  - by bronto

  I need your advice as I don't know if I hit a bug, or I am misunderstanding something. On a Debian Lenny, I am trying to prevent the installation of two particular packages, when they are requested as dependencies fromother packages. I am using the same syntax I successfully used in Squeeze, but with no success at all. On squeeze, the following works as expected: # cat /etc/apt/preferences.d/local-no-pike.pref Package: pike7.6-core Pin: version * Pin-Priority: -1000 If I try to install pike7.6, which depends on pike7.6-core, apt and aptitude refuse to do so. On Lenny, the only difference is that there is no support for "fragments" in /etc/apt/preferences.d, and all preferences must be in the /etc/apt/preferences file. But it's not working. E.g., if the file contains: Package: grub-common Pin: version * Pin-Priority: -1000 apt doesn't stop me from installing grub, which depends on grub-common. I used strace to see if the file is being read, and it is. I was suggested to use some Debug:: options, but they didn't help to pinpoint the problem either. I have google'd a lot with some combinations of "lenny" "prevent" "package" "installation" "pinning" and the like, but nothing nice came out. And of course I read man apt_preferences. What am I missing here?

  Read the article

• Anonymous Login attemps from IPs all over Asia, how do I stop them from being able to do this?

  - by Ryan

  We had a successful hack attempt from Russia and one of our servers was used as a staging ground for further attacks, actually somehow they managed to get access to a Windows account called 'services'. I took that server offline as it was our SMTP server and no longer need it (3rd party system in place now). Now some of our other servers are having these ANONYMOUS LOGIN attempts in the Event Viewer that have IP addresses coming from China, Romania, Italy (I guess there's some Europe in there too)... I don't know what these people want but they just keep hitting the server. How can I prevent this? I don't want our servers compromised again, last time our host took our entire hardware node off of the network because it was attacking other systems, causing our services to go down which is really bad. How can I prevent these strange IP addresses from trying to access my servers? They are Windows Server 2003 R2 Enterprise 'containers' (virtual machines) running on a Parallels Virtuozzo HW node, if that makes a difference. I can configure each machine individually as if it were it's own server of course... UPDATE: New login attempts still happening, now these ones are tracing back to Ukraine... WTF.. here is the Event: Successful Network Logon: User Name: Domain: Logon ID: (0x0,0xB4FEB30C) Logon Type: 3 Logon Process: NtLmSsp Authentication Package: NTLM Workstation Name: REANIMAT-328817 Logon GUID: - Caller User Name: - Caller Domain: - Caller Logon ID: - Caller Process ID: - Transited Services: - Source Network Address: 94.179.189.117 Source Port: 0 For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Here is one from France I found too: Event Type: Success Audit Event Source: Security Event Category: Logon/Logoff Event ID: 540 Date: 1/20/2011 Time: 11:09:50 AM User: NT AUTHORITY\ANONYMOUS LOGON Computer: QA Description: Successful Network Logon: User Name: Domain: Logon ID: (0x0,0xB35D8539) Logon Type: 3 Logon Process: NtLmSsp Authentication Package: NTLM Workstation Name: COMPUTER Logon GUID: - Caller User Name: - Caller Domain: - Caller Logon ID: - Caller Process ID: - Transited Services: - Source Network Address: 82.238.39.154 Source Port: 0 For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

  Read the article

• MAMP Pro mysqld won't start on os x lion

  - by Mike

  getting a Start MySQL Failed error in the GUI.. when i attempt to start mysqld from the CLI i get the following error: ? /Applications/MAMP/Library/bin/mysqld 120623 23:12:47 [Warning] Setting lower_case_table_names=2 because file system for /Applications/MAMP/db/mysql/ is case insensitive 120623 23:12:47 [Note] Plugin 'FEDERATED' is disabled. 120623 23:12:47 InnoDB: The InnoDB memory heap is disabled 120623 23:12:47 InnoDB: Mutexes and rw_locks use GCC atomic builtins 120623 23:12:47 InnoDB: Compressed tables use zlib 1.2.3 120623 23:12:47 InnoDB: Initializing buffer pool, size = 128.0M 120623 23:12:47 InnoDB: Completed initialization of buffer pool 120623 23:12:47 InnoDB: highest supported file format is Barracuda. 120623 23:12:47 InnoDB: Waiting for the background threads to start 120623 23:12:48 InnoDB: 1.1.5 started; log sequence number 1595675 120623 23:12:48 [ERROR] /Applications/MAMP/Library/bin/mysqld: unknown option '--skip-locking' 120623 23:12:48 [ERROR] Aborting 120623 23:12:48 InnoDB: Starting shutdown... 120623 23:12:49 InnoDB: Shutdown completed; log sequence number 1595675 120623 23:12:49 [Note] /Applications/MAMP/Library/bin/mysqld: Shutdown complete i have deleted the mysql.pid file located at /application/mamp/tmp/mysql/mysql.pid and i still get the error above. I can't find where MAMP has set --skip-locking set, my.cnf doesnt have it anywhere. Activity monitor gives me a mysqld process running by me, and everytime i KILL the process both via Activity Monitor and via kill =9 pid it starts right back up.. Sampling the process points back to the MAMP mysqld.. wtf?! About to throw MAMP out the window and boot up a VM of CentOS =)

  Read the article

• Distributed storage and computing

  - by Tim van Elteren

  Dear Serverfault community, After researching a number of distributed file systems for deployment in a production environment with the main purpose of performing both batch and real-time distributed computing I've identified the following list as potential candidates, mainly on maturity, license and support: Ceph Lustre GlusterFS HDFS FhGFS MooseFS XtreemFS The key properties that our system should exhibit: an open source, liberally licensed, yet production ready, e.g. a mature, reliable, community and commercially supported solution; ability to run on commodity hardware, preferably be designed for it; provide high availability of the data with the most focus on reads; high scalability, so operation over multiple data centres, possibly on a global scale; removal of single points of failure with the use of replication and distribution of (meta-)data, e.g. provide fault-tolerance. The sensitivity points that were identified, and resulted in the following questions, are: transparency to the processing layer / application with respect to data locality, e.g. know where data is physically located on a server level, mainly for resource allocation and fast processing, high performance, how can this be accomplished? Do you from experience know what solutions provide this transparency and to what extent? posix compliance, or conformance, is mentioned on the wiki pages of most of the above listed solutions. The question here mainly is, how relevant is support for the posix standard? Hadoop for example isn't posix compliant by design, what are the pro's and con's? what about the difference between synchronous and asynchronous opeartion of a distributed file system. Though a synchronous distributed file system has the preference because of reliability it also imposes certain limitations with respect to scalability. What would be, from your expertise, the way to go on this? I'm looking forward to your replies. Thanks in advance! :) With kind regards, Tim van Elteren

  Read the article

• Trouble with Russian pc's on my wifi

  - by hogni89

  I have created a WiFi hotspot for the local community. The problem is, some Russian PC's (Windows XP, Windows Vista and Windows 7) can't get internet connection (We have a lot of bypassing russian fishing vessels / cargo ships). The pc's obtain a valid IP address, and some of them can even manage to send some few packages - But none of them are usable on the network. They all say "Limited internet access" or "???????????? ?????? ? ????????". The thing these PC's have in common is, that they all run a Russian installation of Windows. No one else has problems with the WiFi hotspot - Danish and English Windows, Linux and OS X all work like a charm. Can it be, that there is a difference between the danish / english windows installation, compared to the Russian installation? EDIT START They can't ping the router (One PC got one response - ONCE), they can't access any sites and Windows newer asks "Is this network public, home or work?". EDIT END PS: The hotspot is a airMAX rocket M from Ubiquiti Networks, Inc (www.ubnt.com)

  Read the article

• windows 7 turns off itself everyday at about 9am

  - by Radek

  I was given this comp at work and after a week or so this strange thing started to happen in the middle of doing something :-( It turns off itself at about 9.10am every morning Just once a day and it works fine after it had it little nap. it happens both if the comp was on all night or I turned it off before leaving the office. I tried to swapped the memory as I was told that there was an issue with memory. But moving or removing any memory did not make any difference. I am not aware that I would install any program that could cause that. I installed AVG and set it up to do every day scan about 8am + if restart is needed it requires user confirmation. 'The Software Protection service has stopped' few minutes before it turned off itself but it happened also at other times without the computer turned off. I turned off Windows automatic updates as the first thing when I got the comp configuration Windows 7 Ultimate Intel Core2 Quad Q9550 at 2.8GH, 8GB RAM ST31000528AS Barracuda 7200.12 SATA 3Gb/s 1TB Update Below message are logged when I turn the comp on again. Message 1: The previous system shutdown at 9:08:54 AM on ?6/?29/?2010 was unexpected. Message 2: Level:Critical Source: Kernel Power EventID 41 Task Category (63) The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly. Log after manual restart Update 2 (task scheduler)

  Read the article

• Why do I need a managed switch and which one should I buy?

  - by ascanio1

  I bought a 2nd router and I want both routers to have direct WAN access to the modem. One of the 2 routers directs VOIP traffic to a telephone line port. This VOIP service is provided by the cable carrier which also leases the modem & the router. The cable company technician told me that this VOIP line uses IPv6 addressing and therefore I must employ an IPv6 capable/compliant Giga Hub/Switch or my telephone line won't work anymore. Pls advise me (brand/model) an IPv6 compliant, 2 port, switch to purchase. Pls educate me: By reading this forum I thought that hubs broadcast traffic to all ports, regardless of which input/output is being used and so, theoretically, they have nothing to do with IP. Correct? Same story for unmanaged switches, where the only difference is that these latter devices route traffic only to those ports which are detected to be in use. Correct? I also understood that unmanaged switches route traffic simply by detecting hardware use and not by selecting specific IP traffic. Correct? Finally, there are managed switches which DO select traffic based on IP and, therefore, only these managed switches are involved with IPv6... Why would my cable company explicitly tell me, over and over, that I must use an IPv6 compliant switch? Why would they need a managed switch instead of an unmanaged one? Thanks in advance for helping me understand!

  Read the article

• Formula-based Excel page headers

  - by Jake Krohn

  I'm using the "Rows to repeat at top" function in Excel's "Page Setup" dialog to ensure that a multi-row header block appears on every printed page of my worksheet. However, I'd like to be able to change certain bits of the header based on the content of the current page. I would simply like to display the value of one cell in the first row that is printed on the page. If this is my header: Section: xx And the data looks like this (columns are Section and Name): 1 Foo 1 Bar 2 Baz I want the "xx" in the header to be "1". If, further down on the next page, the value in the Section column is "3", I want that printed in the header of the next page. I originally thought that using the "OFFSET" function might help, e.g. ="Section: "&OFFSET(A2, 1, 0) But it only shows the offset from the original placement of the header, thus only working on page 1. The end document is a PDF, so right now I'm able to go back in with the "TouchUp Text Tool" in Acrobat and add the numbers page by page. But it gets to be a tedious process with 70+ page reports. Anyone have any better ideas that don't require me mucking up the original Excel document with inserted headers every N lines? This is Excel 2008 for Mac, if it makes a difference.

  Read the article

• Two monitors with Mac Mini - one displays black despite receiving a signal

  - by alex

  My Mac Mini outputs to my two new monitors - Dell U2311Hs. The LED on the bezel displays blue when receiving a signal, or yellow otherwise. Both screens are displaying blue. It also seems my Mini can see both of them... However, one of them is black. It just displays black, but appears to be receiving a signal (when I turn the Mac off, it then displays No Signal). To make things weirder, on startup, the boot up (white with Apple logo) appears on the right monitor (the one that now displays black). Occasionally, it flickers up on the black screen for 1 second. I have tried Detect Displays. It appears to do nothing. I'm also running a dual monitor KVM. Video connections are DVI-D. How can I fix this situation? Thanks. Update This is the weirdest thing - I used the DVI-D cable that came with the KVM and it seems to have fixed it - I didn't both because it looks identical to any other DVI cable (in form an pin out). So, I will accept an answer if someone can tell me what may be the difference in these cables?

  Read the article

• i7 Windows 7 laptop or Macbook Pro 15" (For making 3D model and Animation)

  - by sppdhs

  Hi everyone, I'm thinking of buying a new laptop as my current one will be 5 years old next year and it currently gives me a blue screen everytime I run a heavy software to make 3D models and animation. Question is: Should I buy Macbook Pro or a Windows 7 laptop? I tried to research and some say that Windows would be better, especially because you can buy a very high spec laptop with cheaper price. While some other say Macbook Pro is the better choice as it can run bootcamp with windows 7 100% performance on every software even though it's a mac. Is this true? Which one is actually better? Btw, the software that I usually use is 3Ds Max, Maya, and ZBrush. To note as well, I have never used a Mac before. I've checked around some stores and budget wise, I'll need around AU$3000+ to buy a Macbook pro, and AU$2000+ to buy a windows laptop. Quite a big difference in price range. Thanks in advance for your help.

  Read the article

• IBM BladeCenter S: Disk Configuration

  - by gravyface

  Have just the one storage bay right now (SAS 15K 600GB x 6) and have configured one storage pool in RAID 10 with 4 disks (and two global spares). For each blade, I've created a volume and mapped accordingly: Blade #1 400 GB Blade #2 200 GB Blade #3 100 GB Blade #4 100 GB When I boot up Blade 1 and enter into the UEFI Setup (F1) followed by the Adapters and UEFI Drivers LSI Logic Fusion MPT SAS Driver Utility, I see 4 disks: two are the on-board 73GB drives, the other two are 200GB each and assume I'm being presented with two logical disks from the volume I created and mapped to this blade. I was a bit surprised by this: I figured I would've been presented with one logical drive per volume, not two. I'm assuming I can just configure whatever RAID level I wish that supports two disks, but not really sure what the benefits/trade-offs here. Should I go with RAID 10 on top of RAID 10? RAID 0? Software RAID 0/1/10? Does it even matter? If this is "normal" to see two disks, then I'm going to likely just do some benchmarking and see if it makes a difference changing the RAID levels (my guess is no); if this is not normal, well, please let me know. :)

  Read the article

• Issues Deploying Functional WAR to Elastic Beanstalk with Tomcat7

  - by BFar

  I am currently deploying OpenTripPlanner (http://github.com/OpenPlans/OpenTripPlanner.git) to Elastic Beanstalk. I'm able to successfully build and deploy opentripplanner with my own customized settings on an ec2. I have set it up so that the appropriate WAR file can be placed in the Tomcat/Webapps folder, and when Tomcat is started up, it will auto-deploy, and even download open trip planner's graph.obj from an S3. All of that works just fine, except when I try to deploy to Elastic Beanstalk. When I upload to Elastic Beanstalk, the log shows that my WAR file is successfully unpacked & successfully downloads the graph.obj from my S3. The only difference is that then nothing happens and I can't load the site in my browser. The health is RED, and I can't figure out what is going on. I've tried looking into ports and dns issues, but I can't determine what's wrong. Anyone have any ideas? Why would a WAR that works on tomcat7 outside of Beanstalk fail to be accessible?

  Read the article

• Router vs switch in a LAN [closed]

  - by servernewbie

  If I have a LAN and and connect it with a switch, I understand it uses a CAM table to route packets in layer 2 (by saving mac to port relations). So far all good. However, when using a router for a LAN (ONLY for a LAN, not to connect it to "the outside" WAN/internet/etc) I get a bit confused as to how it internally processes packets. I would first split this into two router scenarios: Router with buit-in switch In this scenario, I would expect that it will act exactly as a switch with a CAM table internally. This would probably benefit a bit in speed (guessing here?) compared to the next option. Router without built-in switch Here is where I get confused. If hostA wants to send a packet to hostB, it will ARP to find hostB's MAC address and send it there. Now, if we had a switch (above scenario) this would be easy. But how does it work now in a router WITHOUT a switch? If I would guess, hostA would send an Ethernet frame with hostB's MAC address to the line. The router would fetch the packet (even though the router has another MAC address, it would still fetch this packet even if it only contains hostB's MAC address). It would strip the Ethernet frame header and check the IP, and then check its own internal ARP table again for the MAC address. Now, this would seem like a waste of resources compared to a router with a built-in switch. But maybe it does not work like that at all. Does it also contain a CAM table? If that would be true, what would then the difference between these two routers really be?

  Read the article

• Why does a document in Word 2007 stop recognizing the mouse after the document loses focus?

  - by alt234

  When I open a document in Word 2007, everything works fine, I can edit, highlight text, etc. However, the instant Word loses focus, when I focus back the document doesn't recognize anything the mouse does. The tabbed menu at the top seems to recognize the mouse but the document itself does not. I can scroll through via the scroll-wheel and I can type. However, typing just shows up where the mouse cursor last was before focus was taken away. I've tried clearing some word data registry keys. I've also found that some Word Add-ins can cause problems. LaserFiche is one I see mentioned a lot. As far as I can tell I have no add-ons though. Any ideas? It's crazy-annoying. UPDATE- - Word is the only program that has this problem - Typically I have Toad (Oracle DB management app), an XP virtual machine with various apps running on it, Skype, Google Talk, and maybe a handful of other programs at any given time open... Windows Media player, Outlook. - Yes, this happens even if nothing else is running. From a fresh restart as well. - I'm running Vista 64 with SP1 - According to Windows Update, I have the latest of everything. This has been happening for a couple of months now. Just never took the time to look into because I usually never have to use word.

  Read the article

• Windows VPN always disconnects after < 3 minutes, only from my network

  - by hemp

  First, this problem has existed for almost two years. Until serverfault was born, I pretty much gave up on solving it - but now, hope is reborn! I've set up a Windows 2003 server as a domain controller and VPN server at a remote office. I am able to connect to and work over the VPN from every windows client I've tried, including XP, Vista, and Windows 7 without issue, from at least five different networks (corporate and home, domain and non.) It works fine from all of them. However, whenever I connect from clients on my home network, the connection drops (silently) after 3 minutes or less. After a short while, it will eventually tell me the connection has dropped and attempt to redial/reconnect (if I've configured the client that way.) If I reconnect, the connection will re-establish and appear to work correctly, but again will silently drop, this time after a seemingly shorter time period. These are not intermittent drops. It happens every single time, in exactly the same way. The only variable is how long the connection survives. It doesn't matter what type of traffic I send. I can sit idle, send continuous pings, RDP, transfer files, all of that at once - it makes no difference. The result is always the same. Connected for a few minutes, then silent death. Since I doubt anyone has experienced this exact situation, what steps can I take to troubleshoot my evanescing VPN?

  Read the article

• Building vs buying a server for an academic lab [closed]

  - by Roy

  I'm looking for advice on the classic build vs buy question. We need a new linux server to run Matlab computation on in our lab (academic). Matlab parallel computing toolbox licence allows up to 12 local workers so we are aiming at a 12 core server with 4GB memory per core (total of 48gb). The system will have an SSD for the OS and a raid-5 (4x2tb) for data. I looked around and found a (relatively) cheap vendor, Silicon Mechanics, that offers a system to our liking (specs below) for $6732. However, buying the components from newegg cost only $4464! The difference is $2268 which is 50% of the base cost. If buying from a company can be thought of as a sort of insurance, basically my premiums are of 50% of the base cost which to me sounds like a lot. Of course any downtime is bad, but the work is not "mission critical", i.e. if it takes a few days to fix it when it breaks its no the end of the world. If it takes weeks to months then its a problem. If it breaks 2-3 times in 3 years, not too bad. If it breaks every month not good. In term of build experience, I set up a linux cluster in grad school (from existing computers) and I build my home pcs but I never built a server before. The server components I'm thinking about: 1 x SUPERMICRO SYS-7046T-6F 4U Tower Server Barebone Dual LGA 1366 Intel 5520 DDR3 1333/1066/800 ($1,050) 12 x Kingston 4GB 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) ECC Unbuffered Server Memory ($420) 2 x Intel Xeon E5645 Westmere-EP 2.4GHz LGA 1366 80W Six-Core ($1,116) 4 x Seagate Constellation ES 2TB 7200 RPM SATA 6.0Gb/s 3.5" ($1,040) 1 x SAMSUNG Internal DVD Writer Black SATA ($20) 1 x Intel 520 Series 2.5" 180GB SATA III MLC SSD $300 1 x LSI LSI00281 PCI-Express 2.0 x8 MD2 Low profile SATA / SAS MegaRAID SAS 9260CV-4i Controller Card, $695

  Read the article

• Puzzling TCP performance over 3G / UMTS

  - by lemonsqueeze

  I'm using 3G as my primary internet connection, and TCP over this thing is getting more puzzling every day. For example: Downloading from kernel.org is crazy fast: $wget http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.6.8.tar.bz2 increases to ~500kB/s after a few secs ! Some servers are incredibly slow, for instance www.graphic-pc.com:Same thing, downloading a big file with wget it starts at ~30kB/s for a split second, then collapses to 5-10k or even worse. Web browsing is decent but somewhat unreliable. Randomly, a page will take really long to load or even fail to load, but a reload can succeed almost immediately. Now, by chance i started playing with OpenVPN over UDP on top of the 3G connection, and OMG suddenly everything's extremely fast !Same www.graphic-pc.com now shoots at 100-200kB/s ! What's going on here ??? How come it is so much better with the VPN than without ?? And why does graphic-pc.com crawl when kernel.org flies ?Something to do with my tcp stack (or the server), or some buggy router in between ?? Notes: Setup is laptop running Ubuntu Lucid and a Huawei 3G dongle (So direct pppd connection). I can reproduce this pretty much any time during the day and I'm not moving, so it's clearly not cell environment or internet congestion. (although kernel.org without VPN sometimes does worse in the evening, 60kB or so - but still 500kB with VPN !) For 2) wireshark shows retransmitted packets, dup ack's, even out of order sometimes. I've tried playing with different /proc/sys/net/ipv4 parameters (tcp_rmem, window_scaling, tcp_congestion...) doesn't seem to make a difference. Update: Tried under windows 7 (no VPN) with some interesting results: tcp settings : default tcp_optimizer kernel.org : 10 kB/s 20 kB/s graphic-pc.com: 8 kB/s 70 kB/s ! tcp_optimizer turned on ctcp among other things. Have to check what os graphic-pc.com is running, my bet is linux's tcp_westwood and ms ctcp don't mix well here...

  Read the article

• How to setup port forwarding from my Webserver (apache) to my Database server (mysql)

  - by karman888

  Hello again guys, and thank you for your help so far. Here is my problem: I have two remote dedicated servers, one webserver that runs apache, and one db server that runs mysql. The apache server is visible on the internet of course, but the second server is only visible to the apache server because they are connected with LAN. I need to connect to the remote mysql server through internet from my home-pc , but only apache server is visible to my home-pc. How can i setup port-forwarding from my apache server to the mysql server so i will be able to "see" the mysql server from my home-pc? This question is a follow-up from my first question Connect to remote mysql server from my application. Problem is that Mysql server is on LAN in which you answered me and helped me a lot by telling me to do "port-forwarding". I looked over the internet, and i cant find a good how-to to do port-forwarding. I'm an experienced programmer, but have little experience on hardware and networks. I can understand though what must be done, so i just need a litle help to sort things out :) I hope you can help me guys, Thank you in advance p.s. machine that Apache is running is on CentOS, mysql server also CentOS. p.s2 webserver runs WebHostManager i dont know if that makes any difference or it can be made easily through this, i just mention it :)

  Read the article

• choosing hosting for custom ecommerce site, shared, dedicated, what to look for?

  - by spirytus

  Hi, I have (almost) developed website for my client and now need to decide on hosting. Most of the users of the site will be located in Australia, and so am I and my client. Now, I want to consider everything before deciding on host and few questions comes to my mind: I cannot afford website being down, and all hosts say something like "99% uptime guranted". Should just that be enough or shall I ask hosts for some stats maybe? Does it make any difference if servers and whole hosting company is located in Australia or outside? I've been hosting few sites with JustHost.com on shared hosting (cheapest plan, servers in US I believe) and never seen any delays but could that be an issue? I would prefer Australian company so I can actually go to them and give them piece of my mind if something goes wrong, but US servers seem cheaper. Would share hosting do? Its ecommerce custom build php application, I know there are security issues with sessions etc on shared hosting. Will take precautions of course but could share hosting be an issue? Would dedicated be worthy option considering that my knowledge of server is very limited? I need to run php/mysql, with preferably unlimited bandwidth as with my experience I cannot tell what amount of traffic would be sufficient. Please let me know if I didn't provide you with enough information so you could answer my questions, will gladly explain further. In advance thanks for any answers :)

  Read the article

• Device CAL, User Cal or Processor license needed for SQL 2008 (architecture explained inside)?

  - by nycgags

  So we have a number of servers in the Amazon cloud running SQL Server Standard edition to aggregate data. For that purpose we are fine, the licensing is handled by our contract with Amazon, no problem there. For the beefier work, we want to install Enterprise Edition (EE) on our servers processing raw data so that we can take advantage of table partitioning. We currently have 3 servers aggregating data from about 40 node servers, all 43 of these servers are running standard edition which is fine. We also have 4 servers running standard processing the raw data, but I think we can get away with 2 (for redundancy) running Enterprise Edition. We have 2-3 dba's that access these DW servers for maintenance (using the same windows login via remote desktop). So visually: 40 -- 3 -- [2] -- 2 -- 1 nodes -- aggregators -- raw (which we want to run EE) -- calculators -- datawarehouse Nodes PUSH to aggregators, Raws PULL from aggregators, Calculators PULL from Raw, Calculators PUSH to datwarehouse I am specifying the push vs. pull in case that changes how the # of licenses is calculated. Q1) how many device (or user) CAL's do we need? Q2) do I need to speak with someone from MSFT to find out if it is ok to install in the Amazon Cloud (Amazon said we need to verify it is ok in our license terms)? Q3) what happens if another device tries to access a server with the limited number of device CAL's? Q4) Are the device CAL's simultaneous number of devices or total? Q5) Do Device and User CAL's cost the same or is there a difference? Q6) Would we need to buy a processor license (we are hoping not to)?

  Read the article

< Previous Page | 898 899 900 901 902 903 904 905 906 907 908 909  | Next Page >