The tag has no wiki summary.

learn more… | top users | synonyms

19
votes
5answers
52k views

Top - what does Virtual memory size mean? …linux/ubuntu

I am running top to monitor my server performance and 2 of my java processes show virtual memory of up to 800MB-1GB. Is that a bad thing? What does virtual memory mean? And oh btw, I have swap of ...
17
votes
3answers
3k views

Virtual vs Physical Servers

I'm after a second opinion; and apologies if this has already been answered (point me in the right direction). Different factions within a project I'm on are engaged in a holy war between virtual vs ...
17
votes
5answers
629 views

Is there a reason to give a VM a round base-2 amount (2048MB, 4096MB, etc) of memory?

The title pretty much says it all, is there any advantage to giving a VM 2048MB of memory instead of rounding to base-10 and doing 2000MB?
8
votes
7answers
2k views

Slicehost Alternatives [closed]

What are some good alternatives to the virtual private server company sliceshost? I would like a few alternates providers.
6
votes
0answers
77 views

Why do I need to assign static ip address to the bridge and not to the physical interface? [duplicate]

I have bond0 with two physical interfaces in it. Normally I used to assign static IP address to this bond0 to set up internet connectivity on the server. Now, because of LXC virtual guests, I had to ...
4
votes
4answers
8k views

HP dl170 g6 and LO100 (iLO) - Can't boot from virtual media

I'm trying to make an HP DL170 G6 server boot via the "virtual media" feature. The system doesn't even try to boot from the virtual media, it seems unable to see it! Here's the test we've been doing: ...
4
votes
5answers
817 views

Looking for Free Virtual Cisco Lab [closed]

I am looking for a free virtual lab where I can test various Cisco Configurations. I currently work for a company that does not have many Cisco boxes, or routers/switches of any vendor in lab, which ...
4
votes
2answers
5k views

Apache Virtual Host Config www vs non-www, Rewrite or sServerAlias?

We have a central httpd.conf and we include confs for various virtual hosts. Until today, we didn't really have a need for "www.subdomain.site.com" domains, only "subdomain.site.com." Now we do, so I ...
4
votes
1answer
7k views

why is kswapd using high CPU on an idle system?

I have an idle Linux centOS system and yet kswapd is using 100% cpu. All I have running is a single bash session with top running.... I have 32G RAM and yet kswapd is constantly using 100% cpu for ...
4
votes
1answer
327 views

Booting Linux 2TB+ partitions

I am using VMware ESXi vSphere 5.0.0 and mounting a 6TB LUN from my Dell EqualLogic SAN. I am presenting the LUN using RDM (Raw Device Mappings) so as to be able to see all 6 TBs. So far, so good. ...
4
votes
2answers
110 views

Where do I start re: my physical application server moving to virtual machines?

My company develops, among other things, a Linux database and application server. The database backend is Sybase ASA. We treat it as a walled garden in order to help keep our support and test loads ...
4
votes
4answers
211 views

virtual appliance resources

I'm fairly new to appliances but have become a big fan of virtualization. Are there any other resources where I can find and download virtual appliances outside of vmware's website? Or do I just need ...
3
votes
2answers
468 views

What precautions should I take when joining my virtual center to Active Directory?

I have virtual center that manages a few ESX hosts and I would like to join it to my Active Directory domain. What things should I consider when making this move? Is there any reason why I would want ...
3
votes
2answers
780 views

What are the problems with running a file server (FreeNAS) in a VM?

I have a FreeNAS file server that uses ZFS for redundant storage. I'm considering running this as a virtual machine using VMWare Workstation (I would give the VM access to the physical disks, rather ...
3
votes
2answers
1k views

Exporting a VM running as a Domain Controller

There is a Microsoft KB article that talks about best practices for running a DC on a VM. One of the notes is "Do not use the Export feature on a virtual machine that is running a domain controller". ...
3
votes
4answers
2k views

Virtual PC - Moving Physical PC into virtual environment

Greetings. I have a small Dell GX260 machine that I have been using for testing purposes. And very often during one of my experiments on the machine I mess it up so I have to re-install Windows XP ...
3
votes
2answers
595 views

VirtualHost not working - always shows default

I have been trying to get this work for hours now. I am trying to set up virtual hosts with Apache on my VPS. I have the following virtual host file in my sites-available folder : <VirtualHost ...
3
votes
1answer
1k views

Heartbeat compared to CARP?

Provided I only require virtual IP (migrated between servers), is there any sense in using heartbeat, or CARP is enough?
3
votes
3answers
6k views

Is it possible to reset FTDI virtual com ports enumeration, we easily get hundreds of COM ports in production environment

When producing devices that use a FTDI USB to serial chip to communicate with a Windows host, we get hundreds of COM-ports, since Windows seems to just increase the port number each time a new FTDI ...
3
votes
1answer
865 views

Virtual Host on G-Wan

I'm trying G-Wan v. 3.28 64 bits(on System: Ubuntu 12.04 64bits) to configure multiple domains on one IP address: listener 1: / gwan / 192.168.2.4_80 / #192.168.2.4 (root host) ...
3
votes
1answer
795 views

Sudden transient spike in Apache process CPU usage. How to track down?

I'm running Apache and every once in a while [once every other day it seems] the number of apache processes will jump considerably and each one takes up around 75% cpu usage. I would love to be able ...
3
votes
2answers
172 views

Specify IP + guest hostname on a virtual machine (without booting it)

My question is simple but I am not sure if it is possible : Is there a way to specify a custom IP address AND a different hostname before I boot a virtual machine from VMWare Workstation ? (Win 7 or ...
3
votes
1answer
101 views

Windows 2008 server hosting in Europe [closed]

I'm searching for a Windows 2008 server in Europe, preferably in Germany or UK or anything with good routing to Denmark (as its where the primary traffic will be generated from). The server will be ...
2
votes
4answers
387 views

How do I allow my computer to refer to itself as any ip on 192.168.1.*?

I'm using a Mac OS X, and I'm trying to begin using VirtualHost functionality with Apache2. I've created and loaded up a hosts file that looks like this: 127.0.0.1 localhost 192.168.0.71 ...
2
votes
6answers
516 views

Setting up a dense virtual lab

I want to create a lab of virtual machines for testing. Something on the order of 80 Windows machines and 20 Linux boxes. The client OS doesn't need to do much but respond to ping, etc. They can ...
2
votes
3answers
80 views

Securing a Virtual Machine outside the LAN

I want to "give" VMs to other people to TAKE HOME and use in their home machines. Those VMs should be configured not to accept USB devices, no CD/DVD and no local drives. Any way keep the VMs secure ...
2
votes
3answers
17k views

How can I create a copy of a vm in vSphere Client running on ESXi 4.0?

I'd like to create copies of the VMs located on my datastore that I can put up temporarily on a different server while I perform some maintenance on our main virtualization server. Aside from using ...
2
votes
1answer
627 views

vmware esx4.1 virtual disk locked after failed snapshot creation

I have vmware vsphere 4 esx4.1. I have a virtual machine with centos6 64bit OS and 3 virtual disks (50GO system/ 250 GO user data / 250 GO backup) When I tried to take a snapshot of the VM, I got an ...
2
votes
2answers
100 views

Upgraded Postfix, Relay Is Broken Now

I upgraded from Debian 5 to Debian 6, and in doing so went from Postfix 2.5.5 to 2.7.1. I'm using MySQL as a backend for virtual domains/mailboxes. After the upgrade, I'm able to receive mail from ...
2
votes
2answers
9k views

How do I create a virtual IP address?

i am a student so i am pretty new at this but i am making a web cluster with two web servers so that if one server fails the website still stays up. my question is how do i assign a virtual IP address ...
2
votes
1answer
35 views

Can you make the /vz directory a symlink?

I have a OpenVZ VPS server with a 500GB hard drive and 240GB SSD. I'd like to have each VM's files stored on the SSD. Can I make their directory within /vz symlink to a directory on the SSD? There ...
2
votes
1answer
116 views

Hard drive space managed like virtual memory?

I'm wondering if this is possible and if there's an implementation of this concept: Imagine that I have a 1 GB RAM disk, a 1 TB internal hard drive and a 10 TB NAS on my LAN. Would it be possible to ...
2
votes
2answers
4k views

KVM and virtual to physical CPU mapping

I'm a relative late comer to the virtualistion party, so you'll have to forgive me if this seems like an obvious question. If I have a server with 12 cores available, does each KVM guest have access ...
2
votes
1answer
58 views

Sort Dynamic Virtual Host Folders

I'm trying to set up a dynamic virtual host for the first time with apache. Is it possible for be to implement some sort of folder sorting system? For example the first ten sites are in: /Vhosts/1/ ...
2
votes
2answers
1k views

Where does cPanel store websites?

When I was using Plesk it was simply under /var/www, however it is empty when I have at least 2 sites now on a cPanel machine. What is cPanel's architecture in terms of storing files?
2
votes
1answer
907 views

managing openvz on multiple servers

I have 3 (quad core each) servers that I'm going to run a small 10 server virtual cluster on. I'm using openvz. xen and kvm aren't options. My current plan is to have a script that resides on each ...
2
votes
3answers
2k views

DRBD / Heartbeat on Virtual Machines

Does anyone have experience configuring drbd with heartbeat between 2 virtual linux machines (VMWare Infrastructure)? The problem I am running into is that heartbeat likes multiple data paths to see ...
2
votes
1answer
40 views

KVM bridging for virtual machines is not working

After restarting the server, I can not ping and reach my virtual machines from the net and vice versa [root@pc1(192.168.0.114) ~]# ping 192.168.0.63 PING 192.168.0.63 (192.168.0.63) 56(84) bytes ...
2
votes
1answer
210 views

bridging real and virtual wireless network interfaces

I have 2 wireless interfaces, one real (eth1) and one virtual (vt0), running on top of the same physical wireless adapter. Both have separate IP address spaces. eth1 is connected to a laptop, and vt0 ...
2
votes
2answers
344 views

Randomly crashing Ubuntu 10.04 on multiple Xen VPS host instances

So we have Ubuntu 10.04 running - all 64 bit. Kernel 2.6.36 and 2.6.38-15 are having the same issues. Problem is random VPS servers are hanging. We have about 30 instances with this particular ...
2
votes
1answer
734 views

Why does windows login hang up on “Applying Computer Settings” for 3-5 minutes

I have a server that hosts about 20 virtual machines. The VM's all use Windows XP. When you log in to any of them after booting them up, it will take about 3-5 minutes to log you in and freeze up on ...
2
votes
2answers
1k views

How to set up internal routing between virtual interfaces and real ethernet interface (Linux)

I have a Linux box with one real (as opposes to virtual, a.k.a. aliased) Ethernet interface I can use (eth0 is used for other purposes - can't use it, nor can I add more NICs). Say it's eth1 I need ...
2
votes
1answer
2k views

Problem copying/downloading Virtual Machines from ESXi 3.5 server

I have a ESXi 3.5 server that has 3 virtual machines on there that I cannot copy/download the virtual machine OR vmdk files from. I have tried the following options with their results: NOTE: all ...
2
votes
1answer
127 views

Hyper-V R2: Need help with disk structure

I'm going to use the free (non gui) version of Hyper-V R2. In my new server I have 8 disks in total (for Hyper-V R2 installation and virtual machine). Atm I'm going to run a single virtual machine, ...
2
votes
1answer
407 views

Virtual interface statistics on Linux

I am trying to get statistics about virtual interfaces I have configured on my Linux box running Ubuntu. /proc/net/dev contains entries for lo and eth1, but I also have two virtual interfaces, lo:2 ...
2
votes
1answer
171 views

What's wrong here? Postfix secondary MX relay with redirection of specific email addresses

The primary mx server for my domain is down, and is likely to be down for a day or so. Meanwhile pressure is on to get sme high priority mail to people who need it. What I want to do is set up a ...
2
votes
4answers
432 views

backup an existing linux server to a virtualbox virtual machine

I have some servers and VPSs to many companies across the world. I want to back them up locally. I have some backup solutions enabled to remote hosts, but I want to have a local backup on a computer ...
2
votes
0answers
118 views

virtual memory commited

After a server bounce happens, and after around 40-45 days time period, we receive continuous “Committed Virtual Memory” alerts which indicates the usage of swap space in the magnitude of >4GB This ...
2
votes
2answers
120 views

Network listener

I'm pretty new to Microsoft Servers so don't blame me if the question isn't that smart [I'm a Unix guy]. I need to install a Virtual Printer of a Microsoft Server 2008 r2. The requirements are: ...
2
votes
0answers
76 views

Exchange Failover causes .ost issues - hownto avoid

Using virtual machine for running exchange and backing it up with a mirror virtual machine in case of failure. During testing of failover and fallback We run into an issue when we fail over the local ...