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• Increase data transfer speed through bonding/lacp?

  - by Matteo

  I want to maximize the throughput of a data transfer between two servers. The copy will be made at the application layer using Robocopy. To clear things up, please check my Visio schema of the network: FS1---------(SW1)===========(SW2)--------- FS2 SW1 to SW2 is connected through 10 gigabit Fiber Channel ethernet FS1 to SW1 is connected through 1 gigabit ethernet FS2 to SW2 is connected through 1 gigabit ethernet I first idea I've come up with is to use LACP, so I could use two Gigabit Ethernet between each server and the switch. A collegue told me that LACP is for availability and not performance, so he reckon this solution will not work. Is he right? Do I have other options? Thank you very much

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• XP Mode as a server, Win 7 as a client

  - by Spyro

  I have two virtual machines (XP Mode). They are connected to each other by a network setting - Internal Network. It is the only working setting. This is the only way I got two virtual XP to ping each other. Now I want to connect each of them from the application that runs on Windows 7 which is hosting both virtual machines, but I can't do that. The firewall on both XP-Mode machines is disabled. Any other networking setting added as additional adapter on Xp-Mode machine does not allow me to connect from Windows 7. So my question is this - how to enable connection from Windows 7 application to XP mode application (client - server)? Point 2 (pass message) work perfectly because of the "internal network" setting. The problem is point 1 and 3.

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• Splunk is fantastically expensive: What are the alternatives? [closed]

  - by samsmith

  Possible Duplicate: Alternatives to Splunk? This has been discussed, but it has been several months, so it may be time to revisit it: Earlier discussion RE Splunk alternatives For the record, Splunk rocks. But the pricing is simply beyond what we can consider (When I spoke with Splunk today, the cost for a system to index 5gb/day of data is over $30,000.) That is more than we spend on SQL Server (by a large multiple), more than we spend on a rack of servers (by a multiple), etc. etc. The splunk sales team is correct (that for $30K we get more value and functionality than if we spend the same building our own system), but it doesn't matter. The splunk cost is simply too high (by a multiple). Soooooo, we are looking around! Is anyone out there building a splunk like system? Our basic need: Able to listen for syslog messages on multiple udp ports Able to index the incoming data in an async way Some kind of search engine Some kind of UI An API to the search engine (to embed in our console) We currently need to index 3-5gb/day, but need to be able to scale to 10gb/day or more. We do not need a lot of history (30 days is fine). We use Windows 2008 and 2003 servers. Thanks for your thoughts! UPDATE: We spent two weeks researching commercial and open source options. Our conclusion: Write our own (we are a software company... we know how to write things). We built a great system built on mongodb and .NET that gives us the functions we needed from MongoDB in about one engineering week. We have now completed our implementation. We use two Mongodb servers (master and slave), and are able to log and index any amount of log data (5gb/day, 15gb/day, etc), limited only by disk space. OBSERVATIONS: This space needs a solid solution that is $1000-3000 flat rate. The licensing models used by the commercial firms are based on a "milk the data center ops guys" models. That is their right (of course!), but it leaves a HUGE space open for someone to come in underneath them. My guess is that in another year or two there will be a good open source solution that will be really usable. Thank you all for your input (even if it was self promotion).

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• insert system disk error after switchting SATA cables

  - by Matthias

  I have 5 hard disks built in my computer, two connected by IDE cables, three by SATA. Today I had to return two of the SATA cables to my room mate. So I grabbed another one I had floating around and connected the remaining disk by unplugging my DVD R/W. Now I receive the 'insert system disk and press enter' error after booting. Disks and cables seem to be fine, since all the disks are recognized in the BIOS. Also, I can mount the disks using a live CD w/o problems. I also tried different orderings of the cables (i.e. plugging the disks in different plugs on the mainboard), I'm not sure if that even matters using SATA. Any Ideas what might be the problem here? The OS installed are Windows 7 and Ubuntu 10, the bootloader installed is GRUB. PS: No RAID involved, JBOD.

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• HOWTO Catch/Redirect all outgoing e-mails on Win2K and Redhat Enterprise

  - by John

  Background: I am integrating two separate web application that are developed in ASP .NET and JSP/Struts. As such, they are hosted on two different server technologies, namely Win2K3 and Redhat Enterprise Server 5.5. Problem: There is a copy of production data in my test environment with real e-mail addresses. I need to test the e-mail functionality of these applications, but I do not want them to send out actual e-mails. Is there a way to catch and redirect all outgoing e-mails? Ideally, I would like to send all outgoing e-mails to another e-mail (i.e., [email protected]) so my testers can look at them. Thanks for the help in advance!

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• Anyone love/hate the PowerConnect line of switches from Dell?

  - by Rob Bergin

  I am looking at replacing some unmanaged 16 port store bought GB switches and wanted to go with Cisco but it may be cost prohibitive. Instead I am looking at ProCurve or Dell's PowerConnect line up. I am looking for SNMP, Management, VLANs, and SFLOW would icing on the switch cupcake. I would get the 6224 or the 6248 and then maybe add the RPS-600 to it for redundant power. I think the RPS-600 supports multiple switches. Rackspace is also a little challenge so I am trying to do it with as little Rack Units as possible. Ideally I would go with two 6224's or a single 6248 and then do two VLANs. Thanks for any feedback. Rob

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• Best way to duplicate databases nightly?

  - by Margaret

  Hey all We just got two new servers, that are running Windows Server 2008. The intent is to make the machines pretty much identical, copying the content of the master to the slave on a nightly basis, so that if anything fails, the second copy can stand in immediately. It doesn't need to be up-to-the-minute mirroring, though I suppose that wouldn't hurt if performance is not affected. The two machines will, amongst other things, each be running an instance of SQL Server 2008. The aim is to duplicate the databases on the master down to the slave on a nightly basis. Unless I'm misunderstanding, the slave databases in mirrored databases require the primary to be present to work correctly; I'm hoping for some solution where we have a second machine that can be up and running with minimal downtime if the first one falls over. Am I misunderstanding mirroring? Is that the best way to do things, or should I use some other mechanism? If so, what?

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• Application Request Routing (ARR) - Single Server Reverse Proxy(ish) Setup

  - by Justin

  I have 1 webserver that has two .NET apps running on it. These are set up on the server as app1.mydomain.com and app2.mydomain.com. I would like to be able to take any request going to app1.mydomain.com/subfolder and rewrite it to app2.mydomain.com/subfolder using ARR. I am having difficulty getting this to work on a single server, and all the ARR examples on the net seem to imply that I require another server dedicated to ARR sitting in front of the two web servers. Is what I am attempting to do possible on one web server, and if so how?! Thanks all.

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• Clicking hyperlinks in Email messages becomes painfully slow

  - by Joel Spolsky

  Running Windows 7 (RC, 64 bit). Suddenly, today, after months without a problem, clicking on links has become extremely slow. I've noticed this in two places. (1) clicking hyperlinks in Outlook email messages, which launches Firefox, takes around a minute. Launching Firefox by itself is instantaneous - I have an SSD drive and a very fast CPU. (2) opening Word documents attached to Outlook email messages also takes a surprisingly long time. The only thing these two might have in common is that they use the DDE mechanism, if I'm not mistaken, to send a DDE open command to the application. Under Windows XP this problem could sometimes be fixed by unchecking the "Use DDE" checkbox in the file type mapping, however, I can't find any equivalent under Windows 7. See here for someone else having what I believe is the same problem. See here for more evidence that it's DDE being super-super-slow.

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• server pinging problem (privately)

  - by ankur kaushik

  i have two server and both have 2 nic one for private and one for public public networkworking properly and private netword not working properly and no pining

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• Windows Disk I/O Analysis

  - by Jonathon

  It appears that we are having a problem with the disk i/o speed on our Windows 2003 Enterprise Edition server (64-bit). As we were initializing a database that created two 1G tablespaces on 3 different machines, it became obvious that the two smaller machines (each 32-bit Windows 2003 Standard Edition with less RAM) killed the larger machine when creating the files. The larger machine took 10x as long to create the tablespaces than did the other machines. Now, I am left wondering how that could be. What programs or scripts would you guys recommend for tracking down the I/O problem? I think the issue may be with the controller card (all boxes are hardware RAID 10, but have different controller cards), but I would like to check the actual disk I/O speed as well, so I have some hard numbers to work with. Any help would be appreciated.

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• Passing a file with multiple patterns to grep

  - by Michael Goldshteyn

  Let's say we have two files. match.txt: A file containing patterns to match: fed ghi tsr qpo data.txt: A file containing lines of text: abc fed ghi jkl mno pqr stu vwx zyx wvu tsr qpo Now, I want to issue a grep command that should return the first and third line from data.txt: abc fed ghi jkl zyx wvu tsr qpo ... because each of these two lines match one of the patterns in match.txt. I have tried: grep -F -f match.txt data.txt but that returns no results. grep info: GNU grep 2.6.3 (cygwin) OS info: Windows 2008 R2 Update: It seems, that grep is confused by the space in the search pattern lines, but with the -F flag, it should be treating each line in match.txt as an individual match pattern.

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• Can KVM CPU assignment count differ from physical hosts CPU count?

  - by javano

  I have read this question. I knew already that I could for example, have a quad core machine with four guests each having two vCPUs. As they don't all be require 100% CPU usage all the time, the scheduler would handle this for me. My question is about how this relates to a fail-over or migration situation; If host1 has two dual-core CPUs, and I assign guest1 four vCPUs (so it accessed all four physical cores), what will happen if I try and migrate it to host2 which only has one dual-core CPU? Can qemu-kvm emulate more vCPUs than there are physical? Or would I have to shut down the virtual machine, change the CPU assignment, migrate it, and then boot it back up (so no live migration)? Many thanks.

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• Clonezilla is not able to clone a RAID 1 disk

  - by Adrian

  I have a HP Server DL320 G5. There are two SATA hard disks configured as RAID 1 through HP embedded RAID controller. Server OS is running GNU/Linux (Fedora) Server booted up with clonezilla live CD. The image will be stored on a NAS connected through NFS. Clonezilla could mount the NFS share and could see the two hard disks /dev/sda and /dev/sdb. I selected /dev/sda for disk cloning. However I could not see the cloning progress and got straight into a prompt for reboot, poweroff, command line I tried to select /dev/sdb but the same issue.

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• Redirecting subsite on same domain to other IIS using HTTPS

  - by Alberto

  I've seen many similar questions (and answers) on this subject, but none seem to be on exactly the same situation I am facing. Which is weird since I don't think it is that special, so forgive me if I haven't searched enough. Anyway. I have two websites which are on two IIS7, one facing WAN and one in the LAN. The WAN facing is already HTTPS-only. I want to add the second website, but on the same HTTPS domain and SSL certificate, so that it becomes a subsite like: https://www.domain.com/subsite How can I do a redirect or rewrite on the first IIS to the second one to make this work? I don't think there is a standard IIS feature that can do this. ISA server is not an option currently. But maybe another extension to IIS exists? Done this numerous times on Apache, and am about to ditch IIS for Apache.

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• 802.11 Capture Frame

  - by ALi

  I am using wireshark in monitor mode to capture all the frame. I buffered all the QosData in order to calculate the biterate of each station on the network. I calculate the biterate but it is not an accurate value. what i need to know is when the station use the network alone and when it uses it with another station? i know if two station with different wifi card for exemple ( st1 802.11g 54 Mb/s, st2 802.11n 300 Mb/s) if st1 uses alone the line the biterate used is 28 MB/s and if st2 uses alone the network the bit rate increase to approximately 150Mb/s but if the two station use the network at the same time the st1 lost about 80% of its bit rate because of the st1 wifi card thx in advance

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• Weird unexpected image compression on a web server running Apache on Ubuntu?

  - by Billy Bob Thornton

  I have a weird problem on my production web server running Apache on Ubuntu: it compresses my images thereby dramatically lowering their quality! Actually I have two virtual hosts running, each located in a different folder. Wether I display .gif images by navigating on the two sites, or acceding them directly by their url, their size and quality are invariably degraded. I tried with three different browsers: same problem. Using them on other sites on the Web: no problem. Of course I disabled mod_deflate on the server (which should not compress images anyway), but the phenomenon remains. On my local développement server, running the same configuration, everything is Ok. Now I'm completely lost! For the record, my configuration: Ubuntu 10.04, Apache 2, Php 5.

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• Redhat cluster Vs Pacemaker Vs Gluster Vs Sheepdog

  - by chandank

  Changing the entire question as earlier one was very confusing. I have been exploring different clustering system to run Virtual machines on two different machines on LAN with high availability. Currently I am already using DRBD resource on two different machines on Primary/Secondary mode. In case the primary fails I manually promote the secondary to Primary and start the VM. I also explored Gluster and looks good, however, I would rather prefer clustering over Gluster (user space FS). So if anyone has idea which one would be better from ease of use prospective please I would be interested in. Moreover, sheepdog project appears good, however, could not find much documentations/Howtos. I am using Centos 6.

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• Intel motherboard drops HDMI output after Windows boots

  - by Nick

  I have an Intel motherboard (DH67CL) that uses Intel HD 3000 video. It has two video output ports: HDMI and DVI. Both my monitors are DVI, so I have two cables: a DVI-DVI and an HDMI-DVI. If I plug a monitor into just one of these ports, things work fine. But if I plug monitors into each of the ports, the system startup screens show on both monitors, along with the "Starting Windows..." screen, but as soon as the system boots into Windows, the HDMI-connected monitor goes to sleep. When I use the Intel video control panel, the HDMI-connected monitor is not detected. How do I get a dual-monitor setup to work?

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• Internal+external interfaces with multiple default gateways on win2003

  - by fileitup

  Im trying to set up several web servers for a load balanced cluster and need to have each server connected to the internal network (for load balancing) as well as to an external network (internet - for administration). I have two NICs but since I cant set two default gateways I have the external gateway as default and the internal as a route rule. This setup only works half way - the internal network is fine but I cant log in from outside or see the web from the box. If I switch the gateways remote login/web will work, but the internal wont. Im sure someone encountered this before but wasnt able to find anything online. Any help will be appreciated.

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• Multi-Domain Root Administrator

  - by Brent Pabst

  We have a new domain structure we are planning on rolling out in the next few months. Essentially there is a single top level and forest domain controller "mydomain.lan" and two children "us.mydomain.lan" and "pl.mydomain.lan". We want to configure an administrator account or two at the top level domain that then has full administrator permissions on the sub domains. By default the top level administrator cannot access or login to machines on the sub-domains. Running W2K8R2. Ideas?

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• How can I install an Apple Magic Trackpad on a PC without Boot Camp?

  - by rymo

  I have a Apple Magic Trackpad and I'd like to use it with my PC. I have no other Apple hardware besides the Trackpad. I do not have OSX and thus no Boot Camp CD. The Trackpad uses Bluetooth and will pair with Windows 7 without specific drivers (appears as an HID-Compliant Mouse), but all it will do is point and left click (physical click, no touch tap). With Apple's Windows driver update, I should be able to achieve: Tap to click Dragging Drag lock Secondary click Two-finger scrolling Two-finger secondary tap/click But how can I obtain this driver without Boot Camp installed? Apple's Boot Camp update EXE will not install on my PC (non-Apple hardware).

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• Logging in to a locked computer

  - by Cpt. Jack

  Just recently I have stumbled across an old family laptop that has been out of use for nearly two years. The OS is Windows Vista Home Premium so I'm not quite as enthused about my find as I originally thought I was going to be. However, when I power up the computer it immediately bring me to a login prompt. No one in the family remembers the password it is set to and I am eager to get into this machine. Does anyone know of a way to work around this issue and get into the computer to be able to find out what was configured and saved on it two years ago. Without re-installing the OS I want to bring it back into commission within the family.

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• Microsoft Wireless Mouse 5000 Scroll Not Working

  - by Nathan Totten

  I have a Microsoft Wireless Mouse 5000 with Intellipiont 7.1 installed on Windows 7 x64. The scroll has stopped working before, but a restart or two always seemed to resolve it. I tested the mouse on another computer and it worked. I also tested an Microsoft Arc mouse on this computer and the scroll worked. I have checked everything I could find on google and nothing helps. I have reinstalled intellipoint two times. Tried to change my mouse to another model in the intellipoint settings as suggested in many forums. Nothing. If anyone has any suggestions that would be great. Otherwise, I think my next step is to pitch this mouse and get a logitech at Best Buy tomorrow.

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• Multicasting and multicast address

  - by Zia ur Rahman

  I have confusion about the multicast addresses, I have read an example which is given by. Suppose two applications have been built to send audio over a network. One application accepts and digitizes an audio input stream, and then sends the resulting frame across the network to other application. The second application receives the digitized audio from the network, converts it back to the audio signal and plays the result over a speaker. Unless the two applications use broadcast to send frames, no other computers on the network will receive a copy of the frame. Multicasting provides an excellent solution to the problems of allowing some computers to participate in audio transmission. To use multicasting , a multicast address must be chosen for the audio application. And the receiving application passes the multicast address to the network interface. The interface begins to accept the packets sent to that address. Question: how this multicast address is chosen, how the receiving application knows that the sender using this specific destination address for the audio frames.

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