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  • Sizing Switches for Storage and Production

    - by Untalented
    Couple questions. Should you always completely separate the storage network switches from production switches or are VLANs fine to segment this traffic? Is there a golden rule here? How do you properly size a switch for your environment based on the specifications the manufacturer provide (Throughput, Forwarding Throughput, Stacking Throughput, Max Mac)? If you have two switch options and one has a maximum Mac address of 8,000 vs. another with 16,0000. What does this really mean to me? How do make sure one vs. another is sized properly for me? Besides VLAN and Jumbo Frame support, is there any other "Must" haves for a virtual environments production or storage networks? There is a wealth of knowledge on sizing SANs and such, but this seems equally important and it's quite challenging to find as much information. -- Just to add some tidbits of information for the environment. This setup above is referring to the data centers which supports two different locations which have about 100 users between the two in total. The storage traffic will be iSCSI and will be 3 ESXi Hosts and one SAN housing about 2.7TB of data. Since there is currently no storage network in place (no SAN), I'm having a hard time regarding #2 to really determine what backplane throughput and switch specifications will be sufficient.

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  • Using pfSense, OpenVPN Connects but Still Can't See the Network

    - by nicorellius
    I am having an OpenVPN issue. I have a pfSense box at home configured to allow traffic through a VPN tunnel. The client computer is Windows XP Home, behind a standard Comcast connection and a Netgear wireless router. I use OpenVPN to access my work network (from where I am trying to get out of in this post) from home (with an XP Pro machine behind pfSense), and this works fine. The client config is similar but has the changes specific to my setup... Here is my XP Home config: client dev tun proto tcp remote pfsense.*.org 1194 (starred out by me) resolv-retry infinite nobind persist-key persist-tun ca ca.crt cert client.crt key client.key ns-cert-type server comp-lzo verb 3 When I launch the OpenVPN GUI, the Tunnel TAP network connection turns red, and I can right-click that to connect to the server. Everything seems to work fine until I browse for the actual network. The Tunnel TAP connection turns green and it says connected to 10.1.1.6 (I have tried different IP pools here too with no luck). I can see the internal network fine, but my home network behind pfSense is not there. I have tried browsing there by using Tools Map Network Drive, using the browser, with no success. When I open the command line on the client and use the ipconfig -all command, I get the following: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : TAP-Win32 Adapter V9 Physical Address. . . . . . . . . : *** (starred out by me) Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 10.1.1.6 Subnet Mask . . . . . . . . . . . : 255.255.255.252 Default Gateway . . . . . . . . . : DHCP Server . . . . . . . . . . . : 10.1.1.5 Lease Obtained. . . . . . . . . . : Monday, March 15, 2010 1:18:37 PM Lease Expires . . . . . . . . . . : Tuesday, March 15, 2011 1:18:37 PM I noticed that the default gateway is not present. Could this be my problem? I am still relatively new to firewalls, VPN, and network configuration so I'm sure I am messing up something simple. Oh yah, I should note that I have firewall rules configured for pfSense to allow traffic through the WAN and the LAN. At first there was just the WAN firewall rule, because that is what I got from the literature I was reading. I then created a LAN rule as well, but I'm not sure if this was correct. Neither way works, though. Screen shots below: Any help is much appreciated.

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  • trying to get the most accurate device location from GPS or Network in Android

    - by arc
    I am trying to determine the most accurate location of a device, in the shortest time possible. I am storing the data as a geopoint, and have it displayed on a mapview. The last time I activated the GPS on my device and let it get a location lock, i was approx 80 miles from where I am now. I have a location manager setup and a location listener. If I do this, I get NULL. myLocOverlay = new MyLocationOverlay(this, mapView); GeoPoint test = myLocOverlay.getMyLocation(); but in the next couple of lines; myLocOverlay.enableMyLocation(); mapView.getOverlays().add(myLocOverlay); With this, the overlay on the map shows the current location. It is using the Network provider, but is also attempting to get a GPS fix (it can't as I am indoors and no where near the top floor). If I construct the geopoint like this; if(lm.getLastKnownLocation("gps") != null) { test = new GeoPoint( (int) (lm.getLastKnownLocation("gps").getLatitude() * 1E6), (int) (lm.getLastKnownLocation("gps").getLongitude() * 1E6)); } else { if(lm.getLastKnownLocation("network") != null) { test = new GeoPoint( (int) (lm.getLastKnownLocation("network").getLatitude() * 1E6), (int) (lm.getLastKnownLocation("network").getLongitude() * 1E6)); } //bad things } Then I get confusing results. If I disable the devices GPS provider then the code moves onto the Network Provider and gives me a fairly accurate result. If I enable the GPS provider, then the geopoint comes back as the last place I allowed the device to get a GPS lock. I want to avoid the above results, and so was looking at using; GeoPoint test = myLocOverlay.getMyLocation(); BUT as I said above, I just get NULL from that. Short of getting the geopoints from both GPS and Network and then comparing them, and disregarding the GPS result if it is say 1 mile out of the Network location - i'm a bit stuck. why doesn't getMyLocation() work, shouldnt that return the GeoPoint of what myLocOverlay is showing on the mapview?

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  • why does Integrated Windows Authentication fail when clients access off the network

    - by Bryan
    My background is not with web applications so this problem is hard for me to explain easily. First I'll try to describe the setup. Client setup:-Only browser that is effected is IE 6-8 (Firefox, chrome, opera, and safari all work fine) -A user will try to access our web application from a company laptop that is not connected to our network. -This machine will be a member of our workgroup and have the company DNS listed as a trusted intranet site. (to which the application in question would be a member) -The security logon mode is set to Automatic Logon only in intranet zone only, and IWA authentication is enabled on the clients browser.Server setup:-Windows server 2003 fp2-The application will first redirect to an Authorization asp page which has anonymous access disabled and IWA enabled in IIS.what should happen is that, since the client is not currently on the network, when this page is called it should prompt the user for network credentials. But with IE, instead of prompting, the user gets a page cannot be displayed error because the IIS manager is denying access to the asp page. If the company DNS is removed from the trusted intranet site list then it prompts correctly but disables single sign on the next time that computer is connected to the network or vpn. My assumption is that since IE uses IWA and the site is listed as an internal site, when no network is found IE just sends nulls to the server attempting to authenticate which is swiftly punted back. Other browsers do not have security zones so when network credentials are not present the server prompts for them. Is there a way to get around this so that our clients can keep the company DNS in the intranet zone but still have the server prompt for credentials when not on the network? Any attempt to allow for anonymous access on the asp page, as far as I know, will cause AUTH_USER to return null and again break SSO. I realize this is slightly rambling so I will do my best to clarify and questions you guys might have. Thanks in advance.

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  • Wifi installation issues with a Sitecom 300N x2 Wireless Network dongle

    - by SlyrNemesis
    Linux newbie here, anyway so here is the problem, I run Ubuntu 10.10 and I have a Sitecom 300N x2 Wireless Network dongle with chipset 8192SU, I used ndiswrapper to install my Windows Wireless driver because Sitecom doesn't have a linux driver, it says hardware present but it doesn't find any Wireless networks, nor does it connect to one. What can I do? The command "dmesg | grep ndis" gave this output in the terminal: [ 9.999954] ndiswrapper version 1.56 loaded (smp=yes, preempt=no) [ 11.111901] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateNetBufferAndNetBufferList' [ 11.111973] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMIndicateReceiveNetBufferLists' [ 11.112099] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMRegisterMiniportDriver' [ 11.112161] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateMdl' [ 11.112220] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMDeregisterMiniportDriver' [ 11.112280] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisFreeNetBufferListPool' [ 11.112339] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateNetBufferListPool' [ 11.112399] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisFreeMdl' [ 11.112457] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMAllocatePort' [ 11.112515] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMNetPnPEvent' [ 11.112573] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMFreePort' [ 11.112631] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMSendNetBufferListsComplete' [ 11.112780] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMSetMiniportAttributes' [ 11.112848] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisOpenConfigurationEx' [ 11.112946] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMIndicateStatusEx' [ 11.113017] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMOidRequestComplete' [ 11.113112] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateMemoryWithTagPriority' [ 11.113200] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateIoWorkItem' [ 11.113271] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisFreeIoWorkItem' [ 11.113342] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisQueueIoWorkItem' [ 11.113413] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisFreeNetBufferList' [ 11.113481] ndiswrapper (import:233): unknown symbol: WDFLDR.SYS:'WdfVersionBind' [ 11.113547] ndiswrapper (import:233): unknown symbol: WDFLDR.SYS:'WdfVersionBindClass' [ 11.113613] ndiswrapper (import:233): unknown symbol: WDFLDR.SYS:'WdfVersionUnbindClass' [ 11.113680] ndiswrapper (import:233): unknown symbol: WDFLDR.SYS:'WdfVersionUnbind' [ 11.113742] ndiswrapper (load_sys_files:206): couldn't prepare driver 'net8192su' [ 11.148888] ndiswrapper (load_wrap_driver:108): couldn't load driver net8192su; check system log for messages from 'loadndisdriver' [ 11.365200] usbcore: registered new interface driver ndiswrapper [ 12.818573] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.819183] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.819796] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.820505] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.821115] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.821726] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.822339] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.822948] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.823560] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.824204] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy

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  • Looking for home networking hardware and software advice

    - by phobos7
    Note: I originally wrote this up in a blog post. I've removed any affiliate links that I put in my original post to ensure I don't annoy anybody. I've recently moved home and I now need to go to the trouble of sorting out my home network yet again. We had Virgin broadband in Hertford but you can't get Virgin in the street we've moved to so I've had to go with O2 Broadband. Normally I prefer to use my own hardward, and previously used the DLink DIR-655 router which was great, but in this situation I am using the O2 Wirelss Box III since I only have an old Netgear DG834PN Wireless G modem router and I'd rather be using Wireless N. Anyway, the place we have moved into has only one phone point in the hallway, has the best TV point in one room and the best place to put the TV and other entertainment stuff in yet another room. So, networking the house up for Internet and TV is required. The diagram below shows the things that I'll have in my home network but there are three points where I'm not quite sure what hardware to us. Wireless Access Point/Bridge, that acts only as a wireless to wire bridge and not an AP, that links up a Media Centre/PC and a couple of consoles to the network. I'm pretty much settled on us an Acer Aspire Revo R3600 as my media PC, probably with Ubuntu or Windows and XBMC installed. Wireless Access Point/Bridge, that acts only as a wireless to wire bridge and not an AP, that links up a device that can decode and stream TV from a TV aerial across the network. The device that is connected to 2). At the moment I'm considering a HDHomeRun by SiliconDust. At the moment I'm considering either the TP LINK TL-WA701ND 150Mbps Wireless Lite N Access Point (very cheap at Amazon) or the Netgear 5 GHz Wireless-N HD Access Point/Bridge. I'd love to get some insight into what you would do in my situation. What Wireless Access Point/Bridge should I put at points 1) and 2)? What device should I choose for point 3) that can decode and stream a TV signal? Is the Acer Aspire Revo R3600 a good choice? ![alt text][6] Note 2: I've also posted this question on AVForums.

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  • Manage Internet connection for a program

    - by michel
    I am using a Windows 7 PC with 2 network cards. One for a public line and one for an internal line behind a proxy. Is there a way or a software program where I can manage which program (Outlook, WM) uses which Internet connection or network card? Using the option of interface metric is not what I am looking for. Someone also suggested me ZoneAlarm, but I dislike this program.

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  • Cat5 vs Cat5e vs Cat6 cable confusion

    - by David Hayes
    I'm just about to move house so I'm going to have to disconnect and re-wire my network. Pretty much all the devices I have support gigabit ethernet should I go out an buy some decent network cables (and if so what type) or should I continue using my mix of cat5 cables I've acquired over the years. Does the type of cable really make a difference to my LAN performance??

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  • resume file copy linux

    - by Andrew Johnson
    How do I resume a copy of a large file in linux? I have a huge file (serveral gigabyes) partially copied to a network drive, and it took a long time, and it was mostly done before the copy operation stopped due to a network problem that is now fixed. How do I resume the file copy. I don't want an inefficient script, and ecp didn't work (it doesn't seem to work for large files).

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  • Account sharing among Ubuntu machines

    - by muckabout
    I'd like a simple and secure system to have allow users in our network to have their account (e.g., 'myname') work on every machine in the network (e.g., such that they could ssh to any machine and have the same userid, mounted smb share). Any suggestions?

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  • Shares on Hyper-V Host or Guest?

    - by Lazlow
    I'm about to deploy a Hyper-V Server, that will have 2 local drives: 250GB for VMs, 2TB for Shares. Does Hyper-V Server (standalone, not as a role) allow you to setup Network Shares? Or will I have to setup a VM with the 2TB drive allocated to it, for setting up the Shares? If Hyper-V supports Shares, would there be a performance benefit? The Shares will be used by both the VMs on the Hyper-V Server and other Servers within the Network.

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  • Basic question on Internet Connection Sharing

    - by Apps
    I've basic question on Internet Connection Sharing in Windows XP. I've a Internet Connection through LAN and I've created an Ad-hoc network that is supposed to share the internet connection. My question is on which connection should I enable "Internet Connection Sharing"? Is it on LAN Connection'Settings > Advanced of Ad-hoc network Connections' Settings > Advanced ? Can you please help me?

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  • How do you access timemachine backups of a different computer?

    - by baloo
    I'm currently backing up using WD My Book World network drive that supports Apple Time Machine. I would like to copy some files from my old laptop backup. However, my old backup isn't showing when you browse the time machine network drive, only the currently used machine is listed (I know there are 3 different backups). How can I access those files not belonging to the currently used laptop?

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  • How do you access timemachine backups of a different computer?

    - by baloo
    I'm currently backing up using WD My Book World network drive that supports Apple Time Machine. I would like to copy some files from my old laptop backup. However, my old backup isn't showing when you browse the time machine network drive, only the currently used machine is listed (I know there are 3 different backups). How can I access those files not belonging to the currently used laptop?

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  • Tool for logging NIC link state events.

    - by Alan B
    Intel NICs have a driver option (in Windows) that will log link state events to the system log, so if the network drops out periodically you can determine that fact. Does anyone know of a simple generic solution that does this, in other words one that is not part of the driver from a particular manufacturer? I know there are plenty of 'big iron' network monitoring tools out there but surely there's something really simple that runs as a service in Windows with minimal setup ? TIA

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  • xtreamer doesn't see Window 7 shares

    - by Assaf Lavie
    Weird situation after reinstalling Windows 7 on my PC. Suddenly the xTreamer (media streamer) that's connected to the same LAN doesn't see shares by my PC. Other PCs (and even a MacBook) on the same network can access these shares just fine. And the xTreamer is capable of seeing other shares in the network (e.g. by some other NAS server I have). It can't be permissions/firewall because the Mac does connect to the shares... I'm stumped. Ideas?

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  • Improve file transfer speed between Windows PCs and servers

    - by Geotarget
    I've setup a server which I've connected to multiple PCs in my workplace. Sadly, data transfer speeds are at max 3 MB/sec per connection which works out slow for file transfers, especially when transferring large files. I'm using Windows filesharing and the server is a Windows Server 2008 (2 Ghz CPU, 1 GB RAM) and the client PCs mostly running Windows 7. How can I detect bottlenecks in my network and improve file sharing speed within the network?

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  • On my Mac, under the 'Shared' folder it shows another computer in my house, am I hacked?

    - by user27449
    I didnt' setup any connection to another computer in my house (its a PC), and I just noticed under my 'Shared' folder in the file explorer on my Mac laptop I see the name of the PC. How could this have shown up when I didn't even try to connect to it before? Could I possibly be hacked or is this normal it just scanned our internal wireless network? I havent' setup any kind of network really, just have a wireless modem that other computers share.

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  • Does NAT change the source MAC address?

    - by user44073
    I'm trying to secure my home network but don't really need the complexity of a VPN so I'm trying to figure out other options. I'd like to allow my iPhone remote access to my home servers but I can't depend on the IP address because it changes quite often (due to the 3G network, etc). Can I filter incoming connections on my router (pfsense) by MAC address or does NAT change the source as it's passing through the different routers on the internet?

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  • What disk setup is needed / best practice for hypervisor-only servers?

    - by Luke404
    Planning to buy some servers to run an hypervisor (Citrix XenServer or VMware vSphere, still have to decide between the two) we'd like to boot off the local redundant SD card module offered by various vendors (eg. Dell, HP, etc...). The actual VMs will run from an existing iSCSI SAN (which, by the way, can't support booting the servers directly off the SAN). What are the reasons, if any, to choose completely diskless servers VS having some local storage? And what would be the guidelines to choose that local storage? (number of spindles, raid level, etc)

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  • No network upsets gnome

    - by Darren Cook
    An issue that has been bothering me for over a year now. My notebook, running ubuntu 10.04, is almost all the time using a wired connection, with static IP address. And a remote DNS server. Network is configured with entries in /etc/network/interfaces and /etc/resolv.conf, rather than whatever the gnome UI tool was (*) But if I'm out, or simply unplug the network cable, a few things get weird. Specifically the gnome-panel stops working - it is still there, but isn't updating. And opening a nautilus window (e.g. to look at files on the local disk) has huge time-outs. By that I mean it will not open the window for something like 30 or 60 seconds; but when it does finally open it I can see the files and it is perfectly usable. Everything else works fine, alt-tab between windows, etc. I use the commandline to find the pid of gnome-panel, kill it, wait a couple of seconds, and it opens up a fresh panel which is normally usable. (Something like 10 minutes later it will have locked/crashed again; the same for the nautilus windows.) I'm guessing this is a DNS issue? Would setting up a local DNS server help? Guess number 2 was related to having a file server mount (samba, though running on another linux box), and symbolic links to files and directories on that file server on my desktop. My question is a bit vague... Does anyone recognize these symptoms, and have a suggestion? Or do you have some troubleshooting suggestions for narrowing down the problem? My /etc/hosts: 127.0.0.1 localhost 127.0.1.1 myhost # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts 127.0.0.1 testsite.local #Other test website URLs here UPDATE: Some timings to open some desktop folder icons. This is after pulling out the network cable. A sub-directory of the desktop took 23 secs to open up. Content appears immediately (just 8 files, it has no further subdirectories). The home directory icon took 12 seconds to open up, but then took about 30 seconds for the files to appear. I closed it and tried again. This time it took 18 seconds to open up, but then 70 seconds before anything appeared. *: I couldn't work out how to use the gnome network tool for my needs, which include 3-4 static IPs for testing virtual hosts locally.

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