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  • load balancing between physical and virtual machines

    - by fefe
    First of all sorry if my question would be not relevant, I'm quite beginner. In short: I have 2 physical machines - first(Windows Server 2007, Apache 2.2) on the second machine esxi installed to host virtual machines . I have been converted my physical machine(1) on esxi(2) and in the next step I would like to deploy a load balancer between the physical and virtual machine. Would be this workaround appropriate? If yes what are the steps to follow?

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  • WPF Application from Visual Studio 2010 crashes Windows 7

    - by Tom
    Hello, I am using visual studio 2010 on Windows 7 64bit. I compiled and ran a simple application basically a thing a child could make. Well the second it started to run, it froze my computer and rendered it unresponsive. It continues to do this every time and for every application. Any ideas why this is happening?

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  • computer plays movie fine but ps3 plays it with no sound?

    - by kacalapy
    i have a movie that plays fine on my computer but when i copy it to an SD card and play it in my PS3 it has no sound. the audio format is mpeg layer-3 bit rate is 128 frame rate is 25frames/ second data rate is 1068 kbps video sample size is 12 bit video compression is DivX i got these stats by right clicking the file and viewing properties. can i open it in some editor and re-save it? what editor? thanks all

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  • Log ports opened by an application

    - by Simon A. Eugster
    I'm searching for something like: tcpdump -p PID # But tcpdump does not know the PID or lsof -i --continuous # But lsof just runs and exits, no «live logging» to log which connections an application opens. In my case, I want to find out to which port git connects when committing. This happens in a fraction of a second, so I cannot use lsof. If there is a lot of traffic, filtering by PID or process name would be useful.

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  • iPhone: how to test that a 3Gs is what it says it is?

    - by Mike
    I'm about to buy a second hand iPhone. It's supposedly a 3Gs; hardly used and de-blocked. Is there any way of checking this through the handset before I give over my money? I recently sold my Nokia W72 and the guy I sold it too put in a code and it showed him my usage details? Any advice given is greatly appreciated. Thanks Mike.

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  • How can I expand my current setup?

    - by Robert
    I currently have an HTTP server running on a single machine (it runs Ubuntu Server Edition, if that helps). In the past that has been sufficient, but as traffic has grown I have begun to need more power and storage space. I have a second machine, and have installed Ubuntu Server Edition on it. How do I get the two to run in unison? How is this usually done in professional setups? Thanks, your answers are appreciated.

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  • HP E200i Controlller RAID Configuration fon Win2008 Ent, Sql Server, IIS Apps etc need opinion

    - by mn
    Hello, Actually I run RAID 5 (4 x SAS drives) with Win 2008 Ent(1x host) Win 2008 End(3x guest) Sql Server 2005 Std (on guest) 3 x asp.net applications (on guest) I bought 3 x drives to create additional array (on same controller E200i, I am waiting now for confirmation is it possible to have 3 raids in same controller) I am planning to have 2 x RAID5 (if it is possible) first RAID 5 with all vhd files, systems etc second RAID 5 all data files and transaction logs I am looking for opinion how to optimize data layer (seven drives, one controller).

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  • Messy Filesytem : Duplicate File Removal from the command line

    - by jrause
    In debian/ubuntu I want to a) create a list of all the files in one directory tree b) do the same for a second directory tree c) compare the two lists such that, only the file NAMES are compared (i.e. just comparing the "file.txt" part so that "/home/folder/file.txt" == "/home/secondfolder/folder/file.txt) d) output a list of all the duplicates can anyone please explain how to do this using scripting languages or regex or something?

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  • Squid on windows loadbalancing only to one server

    - by Martin L.
    After thousands of googles and trying days i cant get the load balancer/failover in squid on windows to work. Iam using squid 2.7. My webservers are 2 single NIC lighttpd and one dual nic lighttpd. server1 in this example is running squid on port 80 and lighttpd on port 8080 (just to test) Requirements: All 3 webservers running lighttpd should be balanced two option for load balancing: Best would be if server1 is busy server2 takes over, if server2 is busy server3 takes over, etc.. Round robin style evenly distributed load. Eg server1 takes first call, server2 second etc.. All requests should be treated the same way (no url rewriting or so on) Sent host headers have to be redirected to every server as http host header, speaking of "server1", "server1.company.internal" and "10.211.1.1". My approach: acl all src all acl manager proto cache_object http_port 80 accel defaultsite=server1.company.internal vhost #reverse proxy entries cache_peer 10.211.2.1 parent 8080 0 no-query originserver round-robin login=PASS name=server1_nic1 cache_peer 10.211.1.2 parent 80 0 no-query originserver round-robin login=PASS name=server2_nic1 cache_peer 10.211.2.3 parent 8080 0 no-query originserver round-robin login=PASS name=server3_nic1 cache_peer 10.211.2.4 parent 8080 0 no-query originserver round-robin login=PASS name=server3_nic2 #decl of names of squid host acl registered_name_hostdomain dstdomain server1.company.internal acl registered_name_host dstdomain server1 #ip of squid host acl registered_name_ip dstdomain 10.211.2.1 # access: redirects the correct squid hostname http_access allow registered_name_hostdomain http_access allow registered_name_host http_access allow registered_name_ip http_access deny all cache_peer_access server1_nic1 allow registered_name_hostdomain cache_peer_access server1_nic1 allow registered_name_host cache_peer_access server1_nic1 allow registered_name_ip cache_peer_access server2_nic1 allow registered_name_hostdomain cache_peer_access server2_nic1 allow registered_name_host cache_peer_access server2_nic1 allow registered_name_ip cache_peer_access server3_nic1 allow registered_name_hostdomain cache_peer_access server3_nic1 allow registered_name_host cache_peer_access server3_nic1 allow registered_name_ip cache_peer_access server3_nic2 allow registered_name_hostdomain cache_peer_access server3_nic2 allow registered_name_host cache_peer_access server3_nic2 allow registered_name_ip cache_peer_access server1_nic1 deny all cache_peer_access server2_nic1 deny all cache_peer_access server3_nic1 deny all cache_peer_access server3_nic2 deny all never_direct allow all Problems: Load balancer does not load balance other than to first server. Only if the first server is killed in any way the second will take over. I have seen the others working at some point, but definitely not as the intended load balancing described above. If the cache_peer_access is not defined sometimes the wrong hostname is sent to the backend webserver and this always depends on the defaultsite= parameter. Probably because the host header on the request to squid is not set and its replaced by defaultsite. Leaving out defaultsite didnt solve the problem. The only workaround i found for this is the current approach with cache_peer_access. Questions: Does the cache_peer_access influence the round-robin? Is there a better workaround to pass the host header to the backed webservers? Which parameters do increase the speed of load balancing or does anyone have a better approach? -Martin

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  • How to merge many text files data in databse

    - by Mirage
    i have around 100 text files. The files have questions and 3 choices. FIles are like below ab001.txt -- contains question ab001a.txt -- is the first choice ab001b.txt ---is second choice ab001c.txt --- is third choice There are thousnad files like this. now i want to insert them in sql or first may in excel like First columns questions and other three columns as answers First two characters are same for soom files , looks like it signifies osme category so around every 30 questioons have same first charaters Any ideas

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  • Communication btwn active 3d glasses and source(s)?

    - by selfmade.exe
    I know that 3d active shutter glasses work with infared or radio (radio = only bluetooth?). I know that both of them are harmfull but, with either of them, does only one signal get send, to just syncronize glasses with monitor, or the trnasmitter and glasses communicate the whole tiime? An infared/bluetooth transimition for a second(s) is tottaly acceptable, no complain at all, unless the transimition is the whole time.

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  • Echo 404 directly from nginx to improve performance

    - by user64204
    I am in charge of production servers serving static content for a website. Those servers are constantly being crawled by bots looking for potential exploits (which isn't that much of a problem security-wise because no application can be reached behind the web server) but generates thousands of 404 per day, sometimes per hour. I am looking into ways of blocking those requests but it's tricky (you want to make sure you don't block legitimate traffic and these bots are becoming more and more clever at looking like they're legit) and is going to take me a while to find an acceptable solution. In the meantime I would like to reduce the performance impact of serving those 404 pages. Indeed we're using nginx which by default is configured to serve it's 404 page from the disk (This can be changed using the error_page directive but in the end the 404 will either have to be served from disk or from another external source (e.g. upstream application which would be worst)) which isn't ideal. I ran a test with ab on my local machine with a basic configuration: in one case I echo a message directly from nginx so the disk isn't touched at all, in the other case I hit a missing page and nginx serves its 404 from disk. server { # [...] the default nginx stuff location / { } location /this_page_exists { echo "this page was found"; } } Here are the test results (my laptop has Intel(R) Core(TM) i7-2670QM + SSD in case you're wondering why they are so high): $ ab -n 500000 -c 1000 http://localhost/this_page_exists Requests per second: 25609.16 [#/sec] (mean) $ ab -n 500000 -c 1000 http://localhost/this_page_doesnt_exists Requests per second: 22905.72 [#/sec] (mean) As you can see, returning a value with echo is 11% ((25609-22905)÷22905×100) faster than serving the 404 page from disk. Accordingly I would like to echo a simple 404 Page not Found string from nginx. I tried many things so far but they all failed, essentially the idea was this: location / { try_files $uri @not_found; } location @not_found { echo "404 - Page not found"; } The problem is that as soon as the echo directive is used, the http response code is set to 200. I tried changing that by doing error_page 200 = 400 but that breaks the configuration. How can I serve a 404 page directly from nginx? (without hacking the source which may be might next step)

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  • `adduser [options] user group` fails ubuntu 11.04

    - by Rob
    I'm want to use adduser However it doesn't seem to work if I provide the second argument for the user's group root@a:~# adduser rick staff adduser: The user `rick' does not exist. The group exists root@a:~# addgroup staff addgroup: The group `staff' already exists. The man page says this should work... adduser [options] user group Any ideas? I can do: adduser --ingroup staff rick So no massive issue, just seems strange.

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  • GA-P31-S3G motherboard usb flash drive boot

    - by user1048125
    I currently trying to understand if my motherboard supports booting from USB flash drive or not... In motherboard manual it written: "First/Second/Third Boot DeviceSpecifies the boot order from the available devices. Use the up or down arrow key to select adevice and press to accept. Options are: Floppy, LS120, Hard Disk, CDROM, ZIP,USB-FDD, USB-ZIP, USB-CDROM, USB-HDD, LAN, Disabled" Is there way to boot from 8GB USB flash drive?

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  • multi-screen switcher

    - by João Melo
    I have a windows 7 machine with vmware and 2 monitors. The first one, with vmware on fullscreen, and the second one as the main screen with windows 7 with the browser and some applications, is there any way to toggle the screens configuration with a hotkey so it switches the main screen to the left and all applications accordingly (Vmware on full screen on the right monitor, and all applications on the left)

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  • iptables intercept local traffic

    - by Anonymous
    i hope someone can help me out with somewhat simple task. I'm trying to redirect a client in my router through my desktop PC, so i can dump the traffic and analyze it (its potential source of poisoning the network with malicious packets). However i don't have a second NIC on my hands and i was hoping i can redirect all the traffic from that IP through my PC. In essence to become MITM for the client. Does anyone have any idea where to start: Current state: (localip)-(router)-(internet) And what i want to do: (localip)-(pc)-(router)-(internet)

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  • Windows 2003 Domain controller

    - by user40766
    I have a win 2K3 domain controller that has sudddenly started logging about 60 events a second. All events are ID 538, 540 and 576 All events pertain to Security Audit of the machine itself logging in successfully. a typical entry is Event Id 540 Successful Network Logon: User Name: <machinename>$ Any pointers to how I can diagnose this? CPU and memory are normal on the machine.

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  • Pasting to Excel from Word - stop a Word new line being converted into a new cell

    - by Sean McRaghty
    So I have a table in MS Word which has two columns. In the second column the text is spread on multiple lines, ie I have pressed 'Enter' to achieve this. When I paste into Excel, it converts these separate lines into separate cells. What I want it to do is to keep the lines in the same cell, just on different lines, ie what would happen if I were to press Alt+Enter in a cell in excel. How would I go about this?

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  • arp "who-has tell" on cloned machine

    - by mcmorry
    I have a urgent problem to solve today, but I'm lost. Please help. I've cloned a Virtual Machine hosted on VM Ware ESXi 4.1 The OS is now Ubuntu Server 12.04 LTS, but at the time of cloning it was 10.04 LTS. I fixed the MAC address manually inside /etc/udev/rules.d/70-persistent-net.rules. It is a known problem on Ubuntu. I had to remove the old MAC address and set the new one as eth0. Everything seems to work fine, except ARP. My provider OVH sent me a warning to resolve it today (this is the second day) or they will block my IP! The log contains many lines like this: Tue Jun 5 01:04:29 2012 : arp who-has 178.32.136.212 tell 178.32.136.224 where .224 is the cloned server that is causing problems, and .212 is the cloned one. arp -na returns: ? (178.33.230.254) at 00:07:b4:00:00:02 [ether] on eth0 ? (178.32.136.212) at 00:50:56:09:8e:f1 [ether] on eth0 The first IP is the ESXi machine. The second one should not be there. I'm not an expert and I don't know what else to do to fix this problem. Any help will be very appreciated. Thanks. EDIT: ifcofig on .224: eth0 Link encap:Ethernet HWaddr 00:50:56:01:32:c6 inet addr:178.32.136.224 Bcast:178.32.136.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fe01:32c6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:399924 errors:0 dropped:465 overruns:0 frame:0 TX packets:241884 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:58006071 (58.0 MB) TX bytes:663603166 (663.6 MB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:516216 errors:0 dropped:0 overruns:0 frame:0 TX packets:516216 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:236284275 (236.2 MB) TX bytes:236284275 (236.2 MB) ifconfig on .212: eth0 Link encap:Ethernet HWaddr 00:50:56:09:8e:f1 inet addr:178.32.136.212 Bcast:178.32.136.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fe09:8ef1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:16014 errors:0 dropped:0 overruns:0 frame:0 TX packets:14511 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:15134444 (15.1 MB) TX bytes:2683025 (2.6 MB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:9944 errors:0 dropped:0 overruns:0 frame:0 TX packets:9944 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1139347 (1.1 MB) TX bytes:1139347 (1.1 MB)

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  • Two Raid 1s in a single system?

    - by DebAtCQ
    I'm building a Raid array for the first time in my system and I have a question regarding having multiple Raid 1 arrays in a single Win 7 system. I'm a bit of an organizational freak with my data and I currently have two separate hard drives I want to mirror. The new motherboard I'm looking to buy supports Raid, so my question is this: a) can I have more than one Raid 1 array in a single system? b) would I have to buy a separate controller for the second array?

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