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  • Esxi with iSCSI SAN slows down with many multiple VMs running

    - by varesa
    I have a server with ESXi 5 and iSCSI attached network storage(4x1Tb Raid-Z on freenas). Those two machines are connected to each other with Gigabit ethernet, and a procurve switch in between. After a while, if I have many(4-5 or more) vms running, they start to get un-responsive (long delays before anything happens). We are trying to find the reason behind this. Today we looked at esxtop, and found that DAVG of that iSCSI LUN stays at 70-80. I read that +30 is critical! What could be causing those high response-times?

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  • Just installed 13.10 and everything is fine except I cannot connect to the internet. Any thoughts?

    - by razorccatu
    I just installed Ubuntu 13.10 on my HP G62 laptop and the install went smoothly. I did the install off of a USB drive after trying ubuntu. While I was testing it, I connected to my Wireless with out issue and surfed a little. After the install, no wireless. I can still connect to my wireless network (at least it tells me I'm connected at full strength) but No servers can be found. I attempted to ping Google to no avail and I attempted to ping my router to no avail. I tried to then hard wire the machine and once again it told me that I was connected but I was not. When I ran dmesg, I got the following message: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolvabe. Please install nss-hostname! Is the hostname the issue? if so, how do I resolve it with out internet connection? If it's not the issue, how do I move forward? Thanks for any help. EDIT. I forgot to attach the image of my ifconfig if that might help.

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  • Cannot access windows share

    - by Wrigley
    I have an accounting program specifically tailored to the IT industry, its called Fincon (exe based). It basically works on a client to server directory base system. the server is currently running on a windows 7 machine with a NTFS partition. I have installed Wine. Have the shared Windows directory mounted with what I assume is the correct command for such being (mount -tsmbfs //servername/sharedir /mnt/fincon -0 usename=username,password=password). I can see the shared dir although it does take a bit long to access it on the Ubuntu machine via the mapped directory but instant via normal network browsing. I have also set up the mapped directory to my D: drive in Wine and have pointed the fincon.ini to read server field from D: directly. Here's my issue, it seems that for some odd reason I cant write to the mapped directory from Ubuntu, yet I can with my Windows machines, the permissions are set correct on the Windows 7 share and I really dunno what I'm missing. I'm quite a Linux noob just switched yesterday. Thanks guys for any help in this would be quite appreciated. As I'm pulling out my hair here and really want to migrate my work PCs to a Linux OS as it just gives less issues than Windows does ever.

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  • xen hotplug can't add vif to eth0: operation not supported

    - by John Tate
    I am new to xen and I am trying to get a domU running but I am having problems with it. I think my network card might not support bridging which is bizarre. This is the error I get when trying to create the domU [root@hyrba ~]# xm create sardis.secusrvr.com.cfg Using config file "/etc/xen/sardis.secusrvr.com.cfg". Error: Device 0 (vif) could not be connected. Hotplug scripts not working. All the xen kernel modules are loaded... xen_pciback 52948 0 xen_gntalloc 6807 0 xen_acpi_processor 5390 1 xen_netback 27155 0 [permanent] xen_blkback 21827 0 [permanent] xen_gntdev 10849 1 xen_evtchn 5215 1 xenfs 3326 1 xen_privcmd 4854 16 xenfs I get this error in /var/log/xen/xen-hotplug.log RTNETLINK answers: Operation not supported can't add vif2.0 to bridge eth0: Operation not supported can't add vif2.0-emu to bridge eth0: Operation not supported

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  • How can I measure TCP timeout limit on NAT firewall for setting keepalive interval?

    - by jmanning2k
    A new (NAT) firewall appliance was recently installed at $WORK. Since then, I'm getting many network timeouts and interruptions, especially for operations which would require the server to think for a bit without a response (svn update, rsync, etc.). Inbound SSH sessions over VPN also timeout frequently. That clearly suggests I need to adjust the TCP (and ssh) keepalive time on the servers in question in order to reduce these errors. But what is the appropriate value I should use? Assuming I have machines on both sides of the firewall between which I can make a connection, is there a way to measure what the time limit on TCP connections might be for this firewall? In theory, I would send a packet with gradually increasing intervals until the connection is lost. Any tools that might help (free or open source would be best, but I'm open to other suggestions)? The appliance is not under my control, so I can't just get the value, though I am attempting to ask what it currently is and if I can get it increased.

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  • Logs being flooded from Squid for having intercepted and authentication enabled together

    - by Horace
    I have done some hefty Google'ing and I can't seem to find a single solution to this issue that I cam currently experiencing. Here is a sample configuration from squid that I have: # # DIGEST Auth # auth_param digest program /usr/sbin/digest_file_auth /etc/squid/digpass auth_param digest children 8 auth_param digest realm LHPROJECTS.LAN Network Proxy auth_param digest nonce_garbage_interval 10 minutes auth_param digest nonce_max_duration 45 minutes auth_param digest nonce_max_count 100 auth_param digest nonce_strictness on # Squid normally listens to port 3128 # Squid normally listens to port 3128 http_port 192.168.10.2:3128 transparent https_port 192.168.10.2:3128 intercept http_port 192.168.10.2:3130 As noted above, I have three ports defined, 2 of them are transparent/intercept and one is a regular http port (which I use for authentication). Which works rather well in this configuration however my logs are getting flooded of this entry authentication not applicable on intercepted requests whenever a transparent connection is made. So far, I can't seem to find any documentation that would describe how to suppress these messages ?

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  • Wired card not connecting after trying to connect

    - by Mike
    I have an Ubuntu 12.10 PC. When I plug in my internet cable it starts connecting and after a minute it says it can't connect. I tried different cables but nothing works. Wlan works. I think it's the network driver but I don't know how to install/update it. Here's the ifconfig info (if it helps): eth0 Link encap:Ethernet HWaddr 00:01:6c:39:2a:8d inet6 addr: fe80::201:6cff:fe39:2a8d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2011 errors:0 dropped:362 overruns:0 frame:0 TX packets:586 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:175452 (175.4 KB) TX bytes:147211 (147.2 KB) 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:9779 errors:0 dropped:0 overruns:0 frame:0 TX packets:9779 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:8460080 (8.4 MB) TX bytes:8460080 (8.4 MB) wlan0 Link encap:Ethernet HWaddr 08:10:74:35:99:9d inet6 addr: fe80::a10:74ff:fe35:999d/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:1790 errors:0 dropped:0 overruns:0 frame:0 TX packets:3250 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:401664 (401.6 KB) TX bytes:2898773 (2.8 MB)

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  • How can I stream video from my XP sp3 desktop to my win 7 laptop?

    - by Robb
    I would like to stream media from my XP sp3 desktop to my Win7 laptop. I currently have Windows Media Player 11 on both machines. The XP one is set up for the media sharing service as far as I can tell. I have also set the 'Play To' option to my Win 7 machine on the XP WMP. However, the only way I've been able to 'stream' is to simply tell my Win7 WMP to add a network folder to its libraries. This seems to work over the wifi but it does stutter a touch, even with a 20 second buffer. The stuttering also appears randomly, maybe 4-5 times during a 22 minute show. I feel like I'm doing something wrong. Is this setup OK or am I missing something?

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  • PHP Runs Very Slow on IIS7. Need Help optimizing our config

    - by Kendor
    Am running a PHP based web app on our Windows 2008 cloud-based server. The app, which runs fine outside of our environment (e.g. a different IIS server), but is VERY slow in our environment. Based on googling this is a relatively common situation. I installed PHP and MySQL via the IIS web deployment method... Here's our setup: Windows 2008 Server Enterprise SP2 (32-bit) Microsoft-IIS/7.0 MySQL client version: mysqlnd 5.0.8-dev - 20102224 $Revision: 321634 $ PHP extension: mysqli Update for IIS 7.0 FastCGI Windows Cache Extension 1.1 for PHP 5.3 I had read elsewhere that ipv6 might be an issue, so I turned this off on the network adapter. The app is using: localhost as its connection Be easy on me, as I'm a bit green about some of these components... Also, rewriting the PHP app or modifying it is NOT an option. I'm reasonably SURE that our config is the issue.

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  • Issue about mapping MAC address to Ipv6 address

    - by deepsky
    I know that the address in ipv6 with prefix range 001 to 111 should use a 64-bit interface identifier that follows the EUI-64 format, which translates the MAC to ipv6 as below. MAC:00-02-b3-1e-83-29 --> 02-02-b3-ff-fe-1e-83-29 --->ipv6 addr: fe80::202:b3ff:fe1e:8329 Then I checked my network status with ipconfig /all on my windows XP, but it seems my ipv6 address doesn't follow the above rule: MAC:00-24-81-XX-XX-XX ipv6 addr:2001:da8:8006:225:0:24:81XX:XXXX Obviously it doesn't follow the EUI-64 format. Instead it just directly use the MAC as the last 8 bytes. Anyone know the reason? Pls Correct me if I am wrong.

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  • Best Practice: Migrating Email Boxes (maildir format)

    - by GruffTech
    So here's the situation. I've got about 20,000 maildir email accounts chewing up a several hundred GB of space on our email server. Maildir by nature keeps thousands of tiny a** little files, instead of one .mbox file or the like... So i need to migrate all of these several millions of files from one server to the other, for both space and life-cycle reasons. the conventional methods i would use all work just fine. rsync is the option that comes immediately to mind, however i wanted to see if there are any other "better" options out there. Rsync not handling multi-threaded transfers in this situation sucks because it never actually gets up to speed and saturates my network connection, because of this the transfer from one server to another will take hours beyond hours, when it shouldn't really take more then one or two. I know this is highly opinionated and subjective and will therefore be marked community wiki.

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  • Outlook is trying to retrieve data from Microsoft Exchange

    - by Adrian Baker
    Some of my users on my network keep getting a pop up message saying "Outlook is trying to retrieve data from Microsoft Exchange". Microsoft Office 2003 is installed on these computers and when this message appears it freezes every users outlook. I have read some articles, and they say it a problem with 2002 and 2003 version of outlook. So I have changed some users Office to MS Office 2007 but still I have the same problem. This is become a big problem as it is happening often and users are getting annoyed. If anyone can give me some advise on how to solve this problem and what could be causing this problem I would be most grateful.

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  • Developing Good Contacts

    There are millions of was you can develop good networking contacts, but you must be open to meeting new people. In the information technology industry, everyone is a potential client. So any place you can meet people is a good place to develop good networking contacts. Here are a few examples Online Discussion Forums – Online forums are a great place to show your knowledge of a subject and allow you to meet people that share your same interests Blog Networks – Allowing others to read your thoughts and comment on them. In addition, you can so the same on other blogs with in the network. Networking Sites – Networking sites are a great way to find new contacts based on your current contacts because you can share common friends, and possibly common interests Volunteering – Volunteering is a great way to meet new contacts, and you can help others at the same time Civic Organizations – Participating in organizations or clubs like the Lions Club, Rotary Club, and religious affiliated organizations because you can meet people of all walks of life, and can share and contribute ideas for common goals Chamber of Commerce – This is another great way to meet contacts especially if you are interested in starting your own business. The chamber is a great way to meet other business oriented people who are always looking to collaborate and improve their business. Family and Friends – Family and friends are another excellent to meet new contacts, because they can always be on the lookout for opportunities for you. For example your brother hears that a friend of his needs a new website, so he gives him your number and highly recommends you. This is really good because the potential client is looking for the service you can perform, and you where already highly recommend.

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  • Using cd Command in Windows Command Line, Can't Navigate to D:\

    - by nicorellius
    This may be a stupid question, and I think I have looked elsewhere to find the answer... Might be a path issue, but when I open the command line and type from the C:\>: cd D:\ I cannot get to the D drive. Even if I type: cd D:\<folder name> The command.exe will auto-complete the line with the tab key, so it knows where I'm at. It just doesn't print to screen the result or actually get me there. This problem exists for the network drives as well. Now, if I use the chdir (cd) command like this: chdir D: or cd d: I get the print out of the D:\ below the command but it still says I'm in the C:\. I feel like I'm missing something simple.

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  • cannot boot ubuntu 13.10 with my usb, Can i change the kernal on my laptop to run it?

    - by Carlos Dunick
    Currently i am running 12.04 and looking for an upgrade to 13.10 I first tried a bootable 64bit usb and failed. With the message saying "Kernal requires an x86-64 CPU but only detected an I686 CPU Unable to boot please use a kernal appropriate for your CPU" then tried 32bit and same message came up. Is this due to my laptop simply being to slow? or can/should i change the kernal somehow? Acer Aspire 5710z Intel Pentium dual core processor, 1.73Ghz, 533 MHz FSB, 1 MB L2 cache. 2GB DDR2 lspci 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03) 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03) 00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 02) 00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 02) 00:1c.2 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 3 (rev 02) 00:1c.3 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 4 (rev 02) 00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 02) 00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 02) 00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 02) 00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 02) 00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) 00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 02) 00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [AHCI mode] (rev 02) 00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 02) 04:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5787M Gigabit Ethernet PCI Express (rev 02) 05:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01) 06:00.0 FLASH memory: ENE Technology Inc ENE PCI Memory Stick Card Reader Controller 06:00.1 SD Host controller: ENE Technology Inc ENE PCI SmartMedia / xD Card Reader Controller 06:00.2 FLASH memory: ENE Technology Inc Memory Stick Card Reader Controller 06:00.3 FLASH memory: ENE Technology Inc ENE PCI Secure Digital / MMC Card Reader Controller

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  • Lots of files being used by blank web page. What are they?

    - by byronyasgur
    I am trying to optimise a website and I was using the network waterfall facility in Google Chrome. When I looked at the results there were lots of files which I didnt recognise. I first thought they might be something to do with Google Chrome itself, so I put a blank HTML file on my desktop and checked but there was nothing in the waterfall except the file itself. So I put a blank file on my server and I got the output below. What are all these files, are they all necessary, is this normal and do I need to be in any way concerned. My hosting provider has always been excellent in every regard that I'm aware of. My host is shared hosting, using cpanel and is based on a LAMP server. I also note that a couple of those file have problems but I have no idea how to fault find that or whether it's a concern. EDIT: I have cleared the cache so I don't think it's a browser cache issue.

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  • XP SP3 PRO - Delayed write failed $mft- can I get which particular file caused the problem ?

    - by user35020
    Hi - I sometimes get that error when resuming from hibernation : Delayed Write Failed : Windows was unable to save all the data for the file G:\$Mft. The data has been lost. This error may be caused by a failure of your computer hardware or network connection. Please try to save this file elsewhere. I know this is caused because the hard drive (G:, a usb external drive) which was plugged in when I hibernated was not read at the right moment - or sometimes I simply forgot to plug it when resuming from hibernation. My question is : is there any way to see which particular file/folder/folder status/don't know what failed to be written ? Hard drive functions correctly before and after - no problem. Is there a detailed log someplace or a utility ? Searched and searched but nothing. Thanks for any help !

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  • JVM Language Summit in July

    - by Tori Wieldt
    A reminder that the 2012 JVM Language Summit is happening July 30–August 1, 2012 in Santa Clara, CA. The JVM Language Summit is an open technical collaboration among language designers, compiler writers, tool builders, runtime engineers, and VM architects, sharing their experiences as creators of programming languages for the JVM, and of the JVM itself. Non-JVM developers are welcome to attend or speak on their runtime, VM, or language of choice. About 70 language and VM implementers attended last year—and over one third presented. What’s at the JVM Language Summit? Three days of technical presentations and conversations about programming languages and the JVM. Prepared talks by numerous visiting language experts, OpenJDK engineers, and other Java luminaries. Many opportunities to visit and network with your peers. Da Vinci Machine Project memorabilia. Dinner at a local restaurant, such as last year’s Faultline Brewing Company. A chance to help shape the future of programming languages on the JVM. Space is limited: This summit is organized around a single classroom-style room, to support direct communication between participants. To cover costs, there is a nominal conference fee of $100. Learn more.

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  • Blocking popups and ads

    - by user74364
    I'm having a fight with ads, popups and tracking cookies. But i'm having some issues. Software used: Chromium 18.0.1025.168 Extensions used: Adblock Plus (Beta)1.2 AdBlock+ Element Hiding Helper1.1.9.18 Better Pop Up Blocker2.1.6 Ghostery3.0.0 With this configuration, i'm always getting this error: Warning: This extension failed to modify a network request because the modification conflicted with another extension. I know if i disable "better popup", this goes away. It's perfectly normal, due to those extensions trying to block the same things. Problem is, i can't live without all of them! Can anyone advise me about some good configuration? Can't live without adblock plus, because i hate ads. Betterpopup blocker is essential too (believe me, chrome doesn't block a lot of popups, and i have a website or 2 that can proove that.) And ghostery is a must... i can't bare the idea of being tracked all the time by some companies. So i'm kinda lost here! everything is needed, but they conflict with each other. i mean, it has to exist a perfect combination out there, i know i'm not the only one hating the privacy issues nowadays! really thankful for any tips guys

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  • DNS Help: Move domain, not mailserver

    - by Preserved
    I'm in the middle of launching a new website for an already-in-use domain. The domain has a complicated email system so we'd like to move that over to the new server a bit later on. Currently the domain DNS is managed by the current webhost. I plan on moving the DNS management back to Network Solutions, then point the A record to the new website's IP. However, currently the DNS has the MX record the same as the A record. When NetworkSolutions is managing the DNS, and I point the A record to the new IP, then the MX record can't be the A record.. Right now: A Record mydomain.com points to IP address 198.198.198.198 MX record mydomain.com points to IP address 198.198.198.198 What I want: A Record mydomain.com points to IP address of new server MX record somehow points to current existing mailserver Does this even make sense?

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  • Problem with fitting graphics card

    - by Gary Robinson
    I have recently purchased a new radeon hd5670 graphics card. The problem I have is that it is what I might call a double height card. So the end where you fix the card to the case is twice the size of the card it is replacing. But this means that it is blocked by the rear of the network card. The only way I can see it to cut that part of the fixture part out then I won't have a problem. But has anyone any suggestions what I could use? To be clear it is not the actual card it is the fixture part which is 90 degress to the card that is causing the problem. Unless someone knows of another solution - some kind of pci-e extender that I could use as I could easily

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  • windows printer spool gets stuck with file at 64kb from linux and mac

    - by Juan Diego
    Hi I have two printers one on a file server with windows 2003, and other with windows XP. The thing is that when i try to print from my machine, my file stays in queue for ever, it says 64kb out of whatever the file i send. I have seen similar problems with some machines that run on Mac OS X. The windows machines apparently have no problems printing. They are not connect through active directory, just the network. In the past I have seen people install non microsoft windows Printer server on windows, i dont remember the name of any of the programs. I have being googling a lot and have not found anything to replace the microsoft print spooler service, maybe i am mistaken. Everyday I have to restart the print spooler service i even created a bat file for it. I am out of ideas here.

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  • Deactivate SYN flooding mechanism

    - by mlaug
    I am running a server that is running a service on port 59380. There are more than 1000 machines out there connecting to that service. Once I need to restart the service all those machines are connecting at the same time. That made some trouble as I have seen that log entry in kern.log TCP: Possible SYN flooding on port 59380. *Sending cookies*. Check SNMP counters. So I changed sysctl net.ipv4.tcp_syncookies to 0 because the endpoints to not handle tcp syn cookies correctly. Finally I restarted my network to get the changes in production Next time I had to restart the service, the following message was logged TCP: Possible SYN flooding on port 59380. *Dropping request*. Check SNMP counters. How can I prevent the system for doing such actions? All necessary counter measures are done by iptables...

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  • Access device with local ip over internet

    - by Joe Perrin
    I apologize up front if this is the wrong place to post this question. It seemed like the best fit. I have a device which is connected to my local network which has an IP of 192.168.1.10 from my router. Additionally I use a Windows 7 machine that runs some software called DirectUpdate which allows me to resolve the local IP of the Windows 7 machine (192.168.1.5) to be accessible to the internet via my domain (example.com) - Basic dynamic DNS updating. I'd like to access the device from example.com. I am unsure how to do this as I don't have any way to install DirectUpdate (or any software) on the device to make the device available to the internet. Any insight here would be appreciated. Thank you.

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  • Dhcp clients fail after successful import of server to new machine (win2k3)

    - by Tathagata
    I transfered the configs of a dhcp server from one server to another both running Windows Server 2003 R2 following http [://] support.microsoft.com/kb/325473. The new server has a statically configured ip(outside the scope) like the old one. Stopped the server on the old, and started up in the new server (authorized too) - but when I ipconfig /renew from a client its network interface fails with all 0.0.0.0 (or 169...*). I read somewhere I need to reconcile the scope to sync the new registry values ('ll try this tomorrow). What other troubleshooting steps can I take other than these (which didn't help)? Things work fine when the old server resurrects and the new one is taken down. The new server showed there was no requests for offer.

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