Search Results

Search found 2108 results on 85 pages for 'kvm virtualization'.

Page 78/85 | < Previous Page | 74 75 76 77 78 79 80 81 82 83 84 85  | Next Page >

• Xen PV packet loss

  - by Delphinator

  I'm having some serious issues with packetloss with one of my servers. This server is a somewhat old (P4-era) machine running Debian Squeeze and Xen 4.0. There are two domUs running on it (both also Debian Squeeze), one gateway and a fileserver. Unfortunatly the processor has no virtualization extensions, therefore only PV can be used. While investigating why our network seems to be slower than it should I found some pretty bad packet loss (~25%). After further investigation and several experiments I did a measurment between the dom0 and one of the domUs: Server listening on UDP port 5001 Receiving 1470 byte datagrams UDP buffer size: 110 KByte (default) ------------------------------------------------------------ ------------------------------------------------------------ Client connecting to dom0, UDP port 5001 Sending 1470 byte datagrams UDP buffer size: 110 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.1.2(domU) port 33817 connected with 192.168.1.100(dom0) port 5001 [ 4] local 192.168.1.2(domU) port 5001 connected with 192.168.1.100(dom0) port 48606 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 46.3 MBytes 38.7 Mbits/sec [ 3] Sent 33020 datagrams [ 3] Server Report: [ 3] 0.0-10.0 sec 46.2 MBytes 38.6 Mbits/sec 0.030 ms 89/33019 (0.27%) [ 3] 0.0-10.0 sec 1 datagrams received out-of-order [ 4] 0.0-10.2 sec 43.0 MBytes 35.3 Mbits/sec 13.074 ms 11575/42256 (27%) tl;dr: 27% packet loss from dom0 to domU with 50Mbit UDP packets. Same thing happens from anywhere in the network. The problem gets better for smaller bandwidths (0.047% for 5Mbit) and worse for higher (59% for 200Mbit) ones. I did increase the CPU-weight of the dom0, there is no swapping going on, and actual networking-hardware is not involved. I never expected Xen (or anything related) to drop packets, and I'm completly clueless what to try next.

  Read the article

• VMWare Raw Device Mapping Not Working

  - by George H. Lenzer

  While I'm waiting for VMWare support to get back to me, I thought I'd ask here. I have a 400 gig LUN presented from a fiber channel SAN to my VMWare host. It's legacy from another virtualization platform and I need to keep it as is to avoid a long period of downtime. I formatted my VMFS3 datastore with 4 meg blocks to allow up to 1 TB disks. Then I tried adding my 400 gig disk as a raw device in physical compatibility mode. I get the error: "File is larger than the maximum size supported by datastore 'Base Test'. [Base Test]VMTEST01/VMTEST01_2.vmdk Originally I had the VMFS datastore formatted with 1 meg blocks which was the cause of this problem since the largest disk allowed would be 256 gigs. But I deleted the data store and then reformatted with 4 megs blocks. I've also tried using virtual compatibility mode for the raw device but it still fails. Does anyone have any suggestions? I've been waiting for a little over a week for VMWare, but that's fine because I'm not yet a paying customer. I'm still in the eval phase.

  Read the article

• Solaris 10: How to image a machine?

  - by nonot1

  I've got a Solaris 10 workstation that I'd like to create a full image backup from. The machine has 2 drives, one UFS for system root, and 1 ZFS for data storage. I intend to add a third HD to keep the backup images of both primary drives (including any zfs snapshots). The purpose is not disaster recovery, but rather to allow me to easily blow away a series of application installation/configuration changes I intend to try. What's the best way to do this? I'm not too familiar with Solaris, but have some basic Linux knowledge. I looked at CloneZilla, but it does not support Solaris. I'm OK with just a dd | gzip > image style solution, but I'd need some way to first zero-out the non-used blocks on the primary drives to aid gzip. They are are much larger than my 3rd drive, but hardly have any real data. Update to clarify: I specifically want to avoid using any file-system snapshot functionality, because part of the app configuration changes involve/depend slightly on existing and new snapshots. Ideally the full collection of snapshots should be part of the backup. Virtualization not an option, because the goal is to do performance evaluation on a very specific HW configuration. For the same reason, the spurious "back up" snapshots could skew performance data. Thank you

  Read the article

• LINQ Join on Dictionary<K,T> where only K is changed.

  - by Stacey

  Assuming type TModel, TKey, and TValue. In a dictionary where KeyValuePair is declared, I need to merge TKey into a separate model of KeyValuePair where TKey in the original dictionary refers to an identifier in a list of TModel that will replace the item in the Dictionary. public TModel { public Guid Id { get; set; } // ... } public Dictionary<Guid, TValue> contains the elements. TValue relates to the TModel. The serialized/stored object is like this.. public SerializedModel { public Dictionary<Guid,TValue> Items { get; set; } } So I need to construct a new model... KeyValueModel { public Dictionary<TModel, TValue> { get; set; } } KeyValueModel kvm = = (from tModels in controller.ModelRepository.List<Models.Models>() join matchingModels in storedInformation.Items on tModels.Id equals matchingModels select tModels).ToDictionary( c => c.Id, storedInformation.Items.Values ) This linq query isn't doing what I'm wanting, but I think I'm at least headed in the right direction. Can anyone assist with the query? The original object is stored as a KeyValuePair. I need to merge the Guid Keys in the Dictionary to their actual related objects in another object (List) so that the final result is KeyValuePair. And as for what the query is not doing for me... it isn't compiling or running. It just says that "Join is not valid".

  Read the article

• Windows Server 2012 Hyper-V very slow

  - by Matt Taylor

  I have been running several Hyper-V VMs on Windows Server 2008 R2 for the past couple of years and enjoying perfectly adequate performance for my testing/development/r&d environments. I'm a software developer so my hardware knowledge is basic however I built the rig using: •Gigabyte GA-X58A-UD3R Intel X58 (Socket 1366) DDR3 Motherboard •Intel Core i7 960 3.20GHz (Bloomfield) (Socket LGA1366) •24GB triple channel RAM The host OS is running on an OCZ SSD and all the VMs are running on a 2TB Marvell SATA3 RAID 0 array consisting of 2 Western Digital Caviar Black 7,200rpm drives. I have tested the speed of the 2TB drive and appear to be getting less than 3Mbs but it can adequately run a 4 VM farm including a DC, (SQL) database and IIS application servers. I recently upgraded the SSD on which the host runs to a 256GB OCZ Vertex 4 and took the opportunity to upgrade to Windows Server 2012 and installed the Hyper-V role. I tried importing one of my existing Windows Server 2008 R2 VMs (and converted it to .vhdx) plus I have tried creating a brand new Windows Server 2008 R2 VM but both are running extremely slowly and I can see nothing obvious using the host and guest Task Manager/Resource Monitor tools. In both cases the VM has 8GB RAM (fixed), 4 CPUs, fixed size HD (not expanding) and is using an external virtual network running on a separate NIC to the host. I have upgraded the BIOS to the latest available version and checked the virtualization settings. I have run out of "obvious" (to a developer) things to check/configure and my next option will be to re-install the host OS but before I do I would very much appreciate any advice from any experts out there. Thanks

  Read the article

• Windows Server 2008 R2 Virtual Network Setup

  - by jpearl01

  Hi all, Some background: I'm very much new to networking in general, and virtualization in particular. I'm trying to set up a series of VMs as we are transitioning to a thin client setup. I have been supplied a limited number of static ip addresses. The server is located in an offsite building which houses the network we use to connect to the internet, share folders etc. The setup I've been trying to go for is this: The host OS (Windows Server 2008 R2) is bound to one nic using one of the static ips (say, Nic1 and ip 10.255.6.61). I've set up another external virtual network attached to another physical nic , and a virtual private network attached to no nic. There is one VM running the same os (as the host). This VM is connected to both the external virtual network (and uses another static ip say Nic2 and ip 10.255.6.62) and also to the virtual private network (I gave it a static random ip 192.168.88.1 subnet mask 255.255.255.0). This virtual private network is connected to all the other VMs. I'd like to share the internet connection with all the other VMs on the private virtual network, and so I installed the RRAS role on the server connected to Nic2, and selected the option to share the internet over the vpn. I've run through the RRAS wizard a few times, trying different configurations, but none of them seem to be letting the other vms connect to the 'net. The vms seem to connect to the virtual private network fine, they are assigned an ip address and everything, but no internet, and no rest of the network either. The other problem is in general I connect to the vms with RDP. Will that be possible with a setup like this? i.e. will the vms show up as computers on the network? If not, what are my other options? Thanks! ~josh

  Read the article

• Run a script on user connection on the VM host

  - by Scott Chamberlain

  I have a server running a Virtual Desktop Managed Pool, what I would like to do is when a user logs in I would like a script to check the number of available VMs and if below a threashold add additional VMs to the pool. The script to check the load and add to the pool is not the problem, I have that already figured out: $collectionName = "Test1"; $rdvh = "vmHost.example.com"; $minAvailableVMs = 2; Import-Module RemoteDesktop; $pool = Get-VirtualDesktopCollection -CollectionName $collectionName; $availableVMs = $pool.Size - ($pool.Size * $pool.PercentInUse / 100); $status = Get-VirtualDesktopCollectionJobStatus $collectionName #only add new servers if we are below the threashold and in the JOB_COMPLETEED state if($availableVMs -lt $minAvailableVMs -and $status.Status -eq [Microsoft.RemoteDesktopServices.Management.VirtualDesktopCollectionJobStatus]::JOB_COMPLETED) { Add-RDVirtualDesktopToCollection -CollectionName $collectionName -VirtualDesktopAllocation @{"$rdvh" = 1} } The problem I am having is, how do I run the above script on the Virtualization Host/Connection Broker/Some other server when a user connects?. I don't think it would be appropriate to run this as a logon script inside the VM, I think there is a way to do this on the management side but I don't know the new scripting interface in Server 2012 R2 well enough to know which commandlets I should look for to schedule this. EDIT: I know System Center is perfect for this but I do not have a license and was denied when I asked for it to be added to the budget.

  Read the article

• How to install Windows 7 on a MacBook with HDDs and no optical drive, without rEFIt

  - by user1238528

  I just removed the SuperDrive on my MacBook Pro and replaced it with an SSD. So now my laptop has a SSD, and a HDD, but no optical drive. I have Lion on the SSD and I want to install Windows 7 on the HDD. Unfortunately, Boot Camp only will install Windows off of the Windows DVD. I have made a bootable Windows 7 thumb drive but my MacBook Pro won’t boot off it. So my question is how can I install Windows on the other HDD? I have thought about maybe using Oracle VirtualBox to install it on that hard drive, but I don’t know if that would allow me to boot directly into Windows. I really don't want to go down the whole virtualization route. I know I could just take out the SSD, put back in the optical drive, run the Windows 7 DVD, take the optical drive back out, put the SSD back in. But that sounds like a nightmare. Also, I really don’t want to use things like rEFIt. Any advice?

  Read the article

• Is Hyper-V server suitable as a desktop testbench?

  - by Thomas.Winsnes

  At the moment we are running a test bench with several desktop computers, that are reimaged every time we need to test on a different operation system. Also because different versions of our software is tested on each image, we have to install our software every time we want to test it. The problem we have had with going with a virtualization technology is that our software is depending on directx/opengl and 3D acceleration, and this has not been something that virtual machines have excelled at. With the release of SP1 for Windows 7 and Server 2008 R2 Hyper-V has gotten better 3D acceleration support, so we are looking into virtualizing our testbench using this. Our test scenario would most likely be something close to this: 1. Remote into the hyper-V server and load the test VM needed for the current tests 2. Remote into the VM and install the new version of the software 3. Run the tests It would be nice, but not essential, if our support team could remote into the VMs to match the users OS+software combination when doing support. Does anyone have any experience with this kind of settup with hyper-v?

  Read the article

• How can I install iTunes in such a way that it can't put any "hooks" or helper programs on my computer?

  - by Joshua Carmody

  I'm buying a new iPad, which means I must once again install iTunes. I've not used iTunes in more than 6 months, since I bought a new computer. I don't like iTunes, but I can live with using it to buy/manage media and sync my Apple devices when the program is open. What I would like to do though, is find a way to install iTunes in such a way that it has absolutely no effect on my system when it is closed. iTunes normally installs several helper programs such as iTunesHelper.exe, and the Bonjour service. These programs run in the background when iTunes is closed. You can force-close them, or remove them from your setup files, but iTunes will often put them right back when you run it. I know these programs are mostly harmless, but they have at times caused issues such as iTunes spending system resources trying to catalog media files or drives connected to VPN, or other issues. At best they're just one more small background process eating up a small piece of my CPU time and RAM. How can I run iTunes without letting it get it's "hooks" into my system? One thought I had is that I could create a Windows user account just for iTunes, and deny it admin privileges. Then if I installed iTunes using that account maybe anything it installed wouldn't affect the "main" account on my PC? But I'm not sure if that would work.... Failing that, maybe some kind of virtualization software or sandbox I could install it in? I'm open to any suggestions. My system is an Intel-based PC running Windows 7 Professional 64-bit. Thanks!

  Read the article

• Windows Server 2008 R2 Virtual Network Setup

  - by jpearl01

  Some background: I'm very much new to networking in general, and virtualization in particular. I'm trying to set up a series of VMs as we are transitioning to a thin client setup. I have been supplied a limited number of static ip addresses. The server is located in an offsite building which houses the network we use to connect to the internet, share folders etc. The setup I've been trying to go for is this: The host OS (Windows Server 2008 R2) is bound to one nic using one of the static ips (say, Nic1 and ip 10.255.6.61). I've set up another external virtual network attached to another physical nic , and a virtual private network attached to no nic. There is one VM running the same os (as the host). This VM is connected to both the external virtual network (and uses another static ip say Nic2 and ip 10.255.6.62) and also to the virtual private network (I gave it a static random ip 192.168.88.1 subnet mask 255.255.255.0). This virtual private network is connected to all the other VMs. I'd like to share the internet connection with all the other VMs on the private virtual network, and so I installed the RRAS role on the server connected to Nic2, and selected the option to share the internet over the vpn. I've run through the RRAS wizard a few times, trying different configurations, but none of them seem to be letting the other vms connect to the 'net. The vms seem to connect to the virtual private network fine, they are assigned an ip address and everything, but no internet, and no rest of the network either. The other problem is in general I connect to the vms with RDP. Will that be possible with a setup like this? i.e. will the vms show up as computers on the network? If not, what are my other options? Thanks! ~josh

  Read the article

• Salary Survey Entry Level network position [closed]

  - by will

  Hello, I started interning with a company about 5 months ago and for the past 7 months I have been a normal part time employee. This week I have a review, where I am hoping to get a raise. I started at $8 interning, and now I'm up to $13. What I am trying to figure out is how to survey what others are making in similar positions so I can take it to the review as a base number. here are my thoughts on my position right now. Review Thoughts My Qualifications: • Associates of applied Science - IT network Specialist • CompTIA A+ certification • CompTIA Server+ certification • CompTIA Network+ certification • Currently pursuing Cisco certifications • Junior status at Insert college Pursuing Bachelors in Information Technology with an emphasis in Networking. 3.4 GPA • 1 year of working at Insert Company. My contributions to Insert Company • Offering near fulltime through semester and fulltime through summer. • Ability to work after hours and on weekends • Developed and support helpdesk system • Set up and maintain Update server to keep desktop clients up to date • Deployed and maintain antivirus solution for end users • Assist with main projects such as SAN, Virtualization, and network survey. Any tips on determining an asking number would help. I was thinking $17-$18, am I way off here? • Migrating end user stations to Windows 7 (current project) • Developing imaging solution for Desktop PCs (current project)

  Read the article

• RAID 10 or RAID 5 for multiple VMs - what is the best choice?

  - by Lars Fastrup

  I have just ordered a new rig for my business. We do a lot of software development for Microsoft SharePoint and need the rig to run several virtual machines for development and test purposes. We will be using the free VMware ESXi for virtualization. For a start, we plan to build and start the following VMs - all with Windows Server 2008 R2 x64: Active Directory server MS SQL Server 2008 R2 Automated Build Server SharePoint 2010 Server for hosting our public Web site and our internal Intranet for a few people. The load on this server is going to be quite insignificant. 2xSharePoint 2007 development server 2xSharePoint 2010 development server Beyond that we will need to build several SharePoint farms for testing purposes. These VMs will only be started when needed. The specs of the new rig is: Dell R610 rack server 2xIntel XEON E5620 48GB RAM 6x146GB SAS drives Dell H700 RAID controller We believe the new server is going to make our VMs perform a lot better than our existing setup (2xIntel XEON, 16GB RAM, 2x500 GB SATA in RAID 1). But we are not sure about the RAID level for the new rig. Should we go for having the the 6x146GB SAS drives in a RAID 10 configuration or a RAID 5 configuration? RAID 10 seems to offer better write performance and lower risk of a RAID failure. But it comes at a cost of less drive space. Do we need RAID 10 or would RAID 5 also be a good choice for us?

  Read the article

• How to manage unprivileged administration of system services using Debian?

  - by ypnos

  At our lab, we have several services handled by different phd students (like myself). Fluctuation is high and people do the job next to their research duties. Until now, services were running on different machines, with different OS setups that can result in administration hell quickly. We want to consolidate our service setup. Our main idea is that the guys responsible for the services should not meddle with the underlying system anymore. Apart from core systems like NFS and kerberos, a typical service is able to run as non-root already. I'm talking about apache, mysql, subversion, mail with openxchange, and so on. Redirecting privileged ports is also no issue (source). What is left is the configuration of the service and its payload. One scenario we envisioned is that every service has its own user and home directory, accessable by the corresponding admins. Backup and fallback of the service is easy, as everything needed for the service to run is found in one place. Are there established ways to create such a setup? Does a mostly unique method exist to make services find their files (other than in system directories) while still using the corresponding debian packages? Are there any catches with our idea that we may have overlooked? Would you maybe claim that virtualization is the answer to our problem? (In our POV, it wouldn't help us keeping system setup strictly separated from service setup.) Thank you for any advice!

  Read the article

• Windows/IIS Hosting :: How much is too much?

  - by bsisupport

  I have 4 Windows 2003 servers running IIS 6. These servers host a bunch of unique web sites (in that they are all different in build/architecture/etc). The code behind these sites range from straight HTML, classic ASP, and 1.1/2.0/3.x flavors of .NET. Some (most) of the sites use a SQL backend, which is hosted on one or two different servers – not the IIS servers themselves. No virtualization on these servers and no load balancing for these particular sites. The problem I’m running into is coming up with some baseline metrics to determine, or basically come up with a “baseline score” to know when a web server has reached its hosting limit. Today, some basic information about each server is used: how much bandwidth does the server pump out, hard drive space availability, and basic (very basic) RAM & CPU utilization (what it looks like at peak traffic times.) I would be grateful if those of you that are 1000x smarter than I am could indulge me with your methods of managing IIS environments. Whether performance monitoring specifics, “score” determination as I’m trying to determine, or the obvious combination of both. Thanks in advance.

  Read the article

• High availability virtual machines

  - by Jeremy

  I've been reading a lot about high availability virtualization, either via Hyper-V or VMWare. In that context, essentially high availabliity means that the VM is hosted by a closter of physical servers (nodes), so if one of the physical servers goes down, the VM can still be served by other physical servers. So far so good, the physical cluster and the VM itself are highly available. However if the service being provided, let's say SQL server, MSDTC, or any other service, are actually being provided by the VM image and the virtualized operating system. So I imagine that there is still a point of failure at the virtual layer that isn't accounted for. Something could happen within the virtual machine itself that the physican cluster can not account for, correct? In that instance the physican failover cluster (Hyper-V) or VMWare host, can not fail over, because the issue is not with one of the servers in the physical cluster - failing over a physical node would not do any good. Does this necessitate building a virtual failover cluster on top of the physical one, or is this not necessary? Alternatively, I suppose you could skip the phsyical clustering, and just cluster at the virtual layer (Child based failover clustering), because that should still survive a physical failure. See image below showing parent based (left), child based (right) and a combination (center). Is parent based as far as you need to go, or is child based more appropriate?

  Read the article

• Ubuntu on VPS becomes unresponsive: BUG: soft lockup - CPU#0 stuck for 22s

  - by Bhante Nandiya

  We have a VPS running Ubuntu, on Xen. The problem is this, about once a day, for about 20-50 minutes, at a random time, the server becomes completely unresponsive to the outside world. After this period, it becomes responsive again, as if nothing had happened, it doesn't lose uptime, it doesn't restart. It just starts responding again as if it had been in suspended animation. These outages occur under conditions of non-exceptional memory and cpu, for example 70% mem, 5% cpu. I have stopped all non-essential services so the usage is very even. These outages don't particularly occur during times of increased memory/cpu (during daily tasks), they sometimes occur at times of very low cpu use (<2%), but in the past also occured during swapping. These blackouts have been occurring both under Ubuntu 12.04 LTS, and Ubuntu 14.04 LTS - no change at all (I upgraded Ubuntu specifically to see if it helped this problem). It is possible to log into our webhosts site, and use their administration console to see error messages from during this time. Presumably, these messages are from the Xen virtualization, the main message goes like this: BUG: soft lockp - CPU#0 stuck for 22s! [ksoftireqd/0:3] (repeats many times) SysRq : Emergency Sync (Sometimes this is the only message in the console) Others seen previously under different load situations include: BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:0] (repeated many times) or: INFO: rcu_sched detected stall on CPU 0 (t=15000 jiffies) (repeated many times with t getting bigger) From googling around I've tried various kernel parameters such as nohz=off and acpi=off to no avail. All tech support has said is that other Ubuntu installations are not suffering the same problem. Anyone got any ideas or experience with this problem?

  Read the article

• What games work well on MacBook Pro (i7/GeForce GT 330M) within VMWare Fusion?

  - by webworm

  I have a 15" MacBook Pro (2.66 i7 with 8 GB RAM) with the GeForce GT 330M 512 MB graphics card. I use it primarily for development (Mac/Web/Windows) though I would like to play the occasional game with my son who uses a desktop PC system at home. I prefer to use VMWare Fusion for virtualization rather than BootCamp for a number of reasons. Heat/Fan issues with i7 under BootCamp Prefer to retain virtual machine as single file rather than dedicated partition (easier to move a nd backup) I have heard that Windows support of the GeForce GT 330 in BootCamp is not all that good. So that being said I was wondering what sort of games I would be able to play within the Fusion environment running Windows 7. I have 8 GB RAM and usually dedicate 4 GB to the virtual machine. I don't expect to be able to play the latest FPS games such as BattleField: Bad Company 2 or Call of Duty, rather I am looking at games such a Total War II, Civilizations IV, Supreme Commander, and other RTS type games. I should mention the native screen resolution of my MacBook Pro is 1680x1050, which is what I would be most likely running the VM at (fullscreen). Thank you for any advice.

  Read the article

• Doesn't VirtualBox 4.0 support drag-drop file copy yet?

  - by Benjamin

  Version 4.0.0 will be new major release. The following major new features were added: -New settings/disk file layout for VM portability; see the manual for more information. -Open Virtualization Format Archive (OVA) support; see the manual for more information. -VMM: support more than 1.5/2 GB guest RAM on 32-bit hosts -Language bindings: uniform Java bindings for both local (COM/XPCOM) and remote (SOAP) -invocation APIs -Chipset: added support for the Intel ICH9 chipset with 3 PCI buses, PCI express and -Message Signaled Interrupts (MSI) -Audio: Intel HD Audio is now available as guest hardware, for better support with modern -guest operating systems (e.g. 64-bit Windows; bug #2785). -GUI: redesigned user interface with guest window preview -GUI: new display mode with downscaled guest display -Resource control: added support for limiting a VM's CPU time and IO bandwidth. -Storage: support asynchronous I/O for iSCSI, VMDK, VHD and Parallels images -Storage: support for resizing VDI and VHD images -Windows Additions: support for automatically updating the Guest Additions (requires -installed Windows Guest Additions 4.0 or later) -Guest Additions: support for copying files into the guest file system What does the last line mean? I thought this is a drag-drop file copy feature like VMWare. I tried that. But I couldn't copy by drag-drop, ctrl-c ctrl-v either. Edit: I mean VBox 4.0 beta, not 3.x The release note is here. Download link is here.

  Read the article

• IP Masquerade and forwarding

  - by poelinca

  Hi all , i got a dedicated server running ubuntu server 10.10 with 3 ip adresses on the same eth card ( example: eth0 192.168.0.1 , eth0:0 188.78.45.0 , eth0:1 ... ) with a 3 virtual machines running ( virtualization technologi used is lxc but i don't think this matters too much ) . Now i need to redirect all ports opened ( using ufw to close/open ports ) from the ip 188.78.54.0 ( eth0:0 ) to a virtual machine ip ( let's say for example 192.168.2.3 ) , all requests made by a virtual machine should be redirected back to the virtual machine that made the request ( in this example 192.168.2.3 ) . Lets say the second vm has the ip 192.168.2.4 now i need to redirect all opened ports to from eth0:1 to this ip and viceversa . And so on and so on , what are the iptables/ufw rules to get this done ? and where to save them ( witch config file ) so they stay the same after reboot . In a few words redirect all requests comming from/to eth0:0 to a certan ip , all requests comming from/to eth0:1 to another ip ... Remember i'm saying all ports opened becouse they might be dynamicly changed . p.s. please excuse my bad english

  Read the article

• g-wan - reproducing the performance claims

  - by user2603628

  Using gwan_linux64-bit.tar.bz2 under Ubuntu 12.04 LTS unpacking and running gwan then pointing wrk at it (using a null file null.html) wrk --timeout 10 -t 2 -c 100 -d20s http://127.0.0.1:8080/null.html Running 20s test @ http://127.0.0.1:8080/null.html 2 threads and 100 connections Thread Stats Avg Stdev Max +/- Stdev Latency 11.65s 5.10s 13.89s 83.91% Req/Sec 3.33k 3.65k 12.33k 75.19% 125067 requests in 20.01s, 32.08MB read Socket errors: connect 0, read 37, write 0, timeout 49 Requests/sec: 6251.46 Transfer/sec: 1.60MB .. very poor performance, in fact there seems to be some kind of huge latency issue. During the test gwan is 200% busy and wrk is 67% busy. Pointing at nginx, wrk is 200% busy and nginx is 45% busy: wrk --timeout 10 -t 2 -c 100 -d20s http://127.0.0.1/null.html Thread Stats Avg Stdev Max +/- Stdev Latency 371.81us 134.05us 24.04ms 91.26% Req/Sec 72.75k 7.38k 109.22k 68.21% 2740883 requests in 20.00s, 540.95MB read Requests/sec: 137046.70 Transfer/sec: 27.05MB Pointing weighttpd at nginx gives even faster results: /usr/local/bin/weighttp -k -n 2000000 -c 500 -t 3 http://127.0.0.1/null.html weighttp - a lightweight and simple webserver benchmarking tool starting benchmark... spawning thread #1: 167 concurrent requests, 666667 total requests spawning thread #2: 167 concurrent requests, 666667 total requests spawning thread #3: 166 concurrent requests, 666666 total requests progress: 9% done progress: 19% done progress: 29% done progress: 39% done progress: 49% done progress: 59% done progress: 69% done progress: 79% done progress: 89% done progress: 99% done finished in 7 sec, 13 millisec and 293 microsec, 285172 req/s, 57633 kbyte/s requests: 2000000 total, 2000000 started, 2000000 done, 2000000 succeeded, 0 failed, 0 errored status codes: 2000000 2xx, 0 3xx, 0 4xx, 0 5xx traffic: 413901205 bytes total, 413901205 bytes http, 0 bytes data The server is a virtual 8 core dedicated server (bare metal), under KVM Where do I start looking to identify the problem gwan is having on this platform ? I have tested lighttpd, nginx and node.js on this same OS, and the results are all as one would expect. The server has been tuned in the usual way with expanded ephemeral ports, increased ulimits, adjusted time wait recycling etc.

  Read the article

• Setting up a home network

  - by Mat Richardson

  I'm trying to get my head around how to do this with the equipment I have. Here's how it is.. I have an old laptop that has server 2003 installed on it. This has no wireless NIC, but I have a spare wireless router that I can wire to it. We have a virgin wireless router which provides the home with internet access. What I would like to do it make resources on the server 2003 machine available to the rest of the devices in the home - specifically a couple of laptops running windows 7. Ideally I'd like to be able to use the laptop as a fileserver but maybe also offer application virtualization. In the first instance however, I'd like to create a file server with the laptop and allow connections to it by the other machines. Virtualisation is just a 'nice to have'... Given the hardware I have is this possible? Can you point me in the right direction how to do what I want if this is the case?

  Read the article

• 403 Forbiden on Apache (CentOS) Server

  - by pouya

  These are my VM setup: HOST: windows 7 ultimate 32bit GUEST: CentOs 6.3 i386 Virtualization soft: Oracle virtualBox 4.1.22 Networking: NAT -> (PORT FORWARD: HOST:8080 => GUEST:80) Shared Folder: centos all the project files goes into shared folder and for each project file a virtualhost conf file is created in /etc/httpd/conf.d/ like /etc/httpd/conf.d/$domain I wasn't able to see anything in my browser before disabling both windows firewall and iptables in centos after that if i type for example: http://www.$domain:8080/ all i see is: Forbidden You don't have permission to access / on this server. Apache/2.2.15 (CentOS) Server at www.$domain.com Port 8080 A sample Virtual Host conf file: <VirtualHost *:80> #General DocumentRoot /media/sf_centos/path/to/public_html ServerAdmin webmaster@$domain ServerName www.$domain ServerAlias $domain *.$domain #Logging ErrorLog /var/log/httpd/$domain-error.log CustomLog /var/log/httpd/$domain-access.log combined #mod rewrite RewriteEngine On RewriteLog /var/log/httpd/$domain-rewrite.log RewriteLogLevel 0 </VirtualHost> centos shared folder is availabe to guest at /media/sf_centos These are file permissons for sf_centos: drwxrwx--- root vboxsf vboxsf group includes: apache and root So these are my questions: 1- How to solve Forbidden Problem? 2- How to setup both host and guest firewalls? 3- How can i improve this developement environment to simulate production environment as much as possible specially security improvements?

  Read the article

• 2008R2 Standard and Hyper-V and Ram Usage (Usable vs Available)

  - by Mark

  A new server was purchased for our development team to start utilizing the full feature set of TFS, namely Lab Management. Because of the need for Lab Management we bought a fairly beefy machine to handle this task and to also act as a build machine. I have been tasked to setup additional features TFS on this machine starting out with a build controller and eventually going towards a full out Lab Management setup using Hyper-V. My question: Upon initially logging I noticed that Windows is registering 64gb but only 32gb available. I know this is a limitation because of licencing since only Standard Edition is installed. Since Hyper-V is another layer that handles the virtualization of guest OS's is Hyper-V able to access this memory? Or is Hyper-V memory usage also limited by 2008 R2 Standard? If Hyper-V can somehow access this memory, is this how it should be setup? Or should the host 2008R2 Standard be upgraded to Enterprise so the Host can utilize the full 64gb? Before I go hog wild and using TFS I wanted to ask some experts so I don't need to reinstall the OS down the road to utilize the additional 32gb. Thanks for any help or links you can share.

  Read the article

• Introducing Oracle System Assistant

  - by B.Koch

  by Josh Rosen One of the challenges with today's servers is getting the server up and running and understanding what all of the steps are once you plug the server in for the first time. So many different pieces come into play: installing drivers, updating firmware, configuring RAID, and provisioning the operating system. All of these steps must be done before you can even start using the server. Finding the latest firmware and drivers, making sure you have the right versions, and knowing that all the different software and firmware components work together properly can be a real challenge. If not done correctly, such as if you separately downloading disk firmware or controller firmware that doesn't match the existing OS drivers, you could experience bugs, performance problems, and incompatibilities. Gone are the days of having to locate the tools and drivers media that shipped with the server only to find out that newer versions of software and firmware are available on the web. Oracle has solved these challenges in the new X3-2 family of servers by introducing Oracle System Assistant. Oracle System Assistant is an innovative tool that is built-in to every new x86 server. It provides step-by-step assistance with configuring the server, updating firmware and drivers, and provisioning the operating system. Once you have completed all of the steps in the Oracle System Assistant tool, the server is ready to use. Oracle System Assistant was designed to be easy and straightforward. Starting it is as simple as pressing F9 when the server is booting. You'll need a keyboard, monitor, and mouse or you can use the remote console feature of Oracle ILOM (Integrated Lights Out Manager) to access a virtual KVM to the server from any machine. From there Oracle System Assistant will walk you through each of the steps necessary to set up your server. After configuring the network settings for Oracle System Assistant, the next step is to check for any new software or firmware for the server. Oracle System Assistant connects back to Oracle using your My Oracle Support account and downloads any updates that were made available to you for this specific server. This is where you really start to see the innovation that went into Oracle System Assistant. Firmware for Oracle ILOM and BIOS, operating system drivers, and other system firmware (including for option cards and disk drivers) come as a single bundle, downloading as a single unit, that has been engineered and tested to work together by Oracle. Oracle System Assistant figures out the right combination for your server, so you don't have to. Now that the server has the latest firmware, Oracle System Assistant will next walk you through configuring the hardware. From Oracle System Assistant, you can configure many Oracle ILOM settings, including the network settings and initial user accounts. This ensures that ILOM is accessible and ready to use. Oracle System Assistant is where all parts of the server come together. In addition to communicating with Oracle ILOM and interacting with BIOS, Oracle System Assistant understands and can configure the storage subsystem. Before installing the operating system, Oracle System Assistant can detect the storage configuration and configure RAID for all disks in the system. At this point, the server is ready to be provisioned with the host operating system. You can use Oracle System Assistant to provision a supported OS, including Oracle Linux, Oracle VM, RHEL, SuSe Linux, and Windows. And by using Oracle System Assistant, you can be sure that the proper OS drivers are installed for each of the installed hardware components. With Oracle System Assistant, initial setup of the server has never been easier. If we can innovate around problems and find solutions to make our servers easier to manage, this reduces IT costs and makes managing servers simpler. I think with Oracle System Assistant we have done just that. Josh Rosen is a Principal Product Manager at Oracle and previously spent more than a decade as a developer and architect of system management software. Josh has worked on system management for many of Oracle's hardware products ranging from the earliest blade systems to the latest Oracle x86 servers.

  Read the article

< Previous Page | 74 75 76 77 78 79 80 81 82 83 84 85  | Next Page >