VMware ESX is an enterprise-level computer virtualization product offered by VMware, Inc.

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What kind of storage do people actually use for VMware ESX servers?

VMware and many network evangelists try to tell you that sophisticated (=expensive) fiber SANs are the "only" storage option for VMware ESX and ESXi servers. Well, yes, of course. Using a SAN is fast, ...
18
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3answers
70k views

How to run VMWare ESX or ESXi in a virtual machine?

Can VMWare ESX or ESXi be installed and used inside a virtual machine? It can be installed inside VMWare Workstation or Server, but then it doesn't work; the main symptoms are: It runs REALLY ...
17
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10answers
24k views

Running 100 virtual machines on a single VMWare host server

I've been using VMWare for many years, running dozens of production servers with very few issues. But I never tried hosting more than 20 VMs on a single physical host. Here is the idea: A stripped ...
14
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9answers
15k views

Is it possible/advisable to run VMware Server ESX/ESXi on a laptop?

The idea of having a small footprint hypervisor as the primary OS on a laptop or desktop where every "real" OS is a guest appeals to me. Now I realize this software is more typically used on blades ...
11
votes
3answers
13k views

Snapshot/rollback for libvirt+KVM?

I've recently begun using KVM for my development/test environment on a Linux host system with 8G memory. Prior, I was using VMware Fusion for my virtual environment, but my Macbook only has 2G memory. ...
11
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6answers
741 views

How to utilize spare workstation drive space for server storage/backup

So, given the fact that you can only get hard drives of about 160GB now for the cheapest price, I find i have a ton of extra drive space on workstations spread throughout my office. I'd like to ...
10
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3answers
1k views

Why not use vmware tools for time synchronisation?

We have two VMWare environments running a bunch of (mainly) Redhat 5.9 and 6.4 guests. We are having issues with time drift (minutes ahead per week). We use ntp, syncing to the local domain ...
10
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2answers
24k views

How to backup VMWare ESXi using free tools?

What do I need to do to establish backup of ESXi 3.5 or 4 server? It is my understanding that the server runs Linux, so as far as I understand the backup sequence should be: create a snapshot of VM ...
9
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10answers
4k views

Vmware host time drift

How does one ensure that linux hosts, running on vmware infrastruction 3 or vmware 3 esxi remain in sync with the ntp server. I have found that a linux guest running under esx or esxi has a tendency ...
9
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6answers
4k views

Choosing between VMWare ESX and ESXi

We currently run one instance of VMWare ESX server, but want to start virtualizing more physical hardware with VMWare, while keeping the cost of VMWare licensing as low as possible. Is ESXi a good ...
9
votes
1answer
361 views

Ballooning occuring on SQL server

From what I understand ballooning should occur only when the host begins to run out of physical memory, somewhere above 90% usage. I have an SQL server running in a three node cluster (64 GB RAM in ...
9
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3answers
6k views

Has anyone achieved true differential sync with rsync in ESXi?

Berate me later on the fact that I'm using the service console to do anything in ESXi... I've got a working rsync binary (v3.0.4) that I can use in ESXi 4.1U1. I tend to use rsync over cp when ...
9
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1answer
2k views

How can I setup vSphere so that VLAN tags are not stripped at the vSwitch?

I am trying to test a VLAN-related networking issue, so I thought that firing up a couple virtual machines would be the easiest and cleanest method to test the problem. On the vSphere server I ...
8
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7answers
36k views

Can you use a USB dongle inside a VMWare ESX Virual Machine?

I need to know if a USB dongle that is required as a license key for a piece of software will accessible from the physical host machine. This will be a small vSphere 4 installation targeting the ...
8
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2answers
9k views

What happens to children when deleting a snapshot in vmware?

I'm new to virtualization and want to make sure I understand what will happen when I delete a snapshot Say I have a tree like this Base SnapshotA SnapshotB SnapshotC Two questions: If I ...
8
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2answers
2k views

Adding new virtual disks to a RHEL host in ESX “live”

I'm sure I've just missed which tutorial/manual page covers this, but how do you add get the guest OS to recognize that you've added new drives to it without a reboot? I have a RHEL5 guest running on ...
8
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2answers
1k views

Is there a standard way to benchmark a Windows VM performance from within the guest OS?

We are seeing our software behaving unusually at one of customers where it is being run inside a Windows 2008 virtual machine. The host is VMWare ESX Server. The biggest issue I have seen is our ...
8
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5answers
2k views

Any opensource equivalent of virtual center?

We got 10 ESXi hosts running. We don't have budget for Virtual center licenses. Is there some free tool that just gives us consolidated view of all VMs with poweroff and poweron options for each VM.We ...
7
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6answers
3k views

hardware recommendations for a DIY storage system based on ZFS [closed]

Looking to make use of old server lying idle as a proof-of-concept ...here are specs Dell PE 2900: Xeon 5110 - 2P, 12 GB RAM, 8x 300 GB 15K drives, Perc 5i+256 MB cache what additional h/w would be ...
7
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3answers
2k views

Why don't people just use rsync to back up vmware guests?

If I am running a modern vmware ESXi system, I can drop in a statically linked rsync binary and rsync files to any destination over SSH. I'm trying to understand why most (all ?) backup of vmware ...
7
votes
6answers
4k views

Is it possible to manage ESX servers from Linux?

VMware vSphere Client can not run in wine. Neither in Mono. What tools are you using to create, start/stop new VMs, connect on the console without VMware vSphere Client?
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5answers
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Why is the vSphere console view so slow?

Why is the Console view on the vSphere client so slow? It's a real shame because it's a shame to have to establish an RDP session every time you work on one of the VMs because of the speed of the ...
7
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2answers
489 views

VMWare vSphere and the move from ESX to ESXi

I was working on a standalone ESX 3.5 system last night in order to upgrade to vSphere 4.1u1. I realized that the full ESX download had been deemphasized on the VMWare website. While I've known that ...
7
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1answer
262 views

Scaling out within a VMware host - add vCPUs or VMs?

We have an ASP.NET MVC site hosted on two VMware ESX hosts. Each host has two sockets with quad core CPUs (8 logical cores per host). We have two VMs on each host. Initially, only one vCPU was ...
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6answers
5k views

Should Linux VM's in VMware/ESX have a swap partition?

On a VMware ESX setup what is the difference of these options?: a Linux VM with 1GB RAM and 1GB swap partition and the VM uses 1.5 GB ram a Linux VM with 1GB RAM and no swap partition and the VM ...
6
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7answers
473 views

High availability virtual machines

I've been reading a lot about high availability virtualization, either via Hyper-V or VMWare. In that context, essentially high availability means that the VM is hosted by a cluster of physical ...
6
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4answers
4k views

howto plan RAID for ESX

eight 300GB SAS drives are available. Can ESX be put on one disk as RAID-0 and others as RAID-5 ? so that in the event of disk failure data (VMs) are safe. if os disk RAID-0 fails could that be ...
6
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6answers
12k views

How would you apply a BIOS update for a Dell M610 blade with VMware ESXi installed?

We've got a Dell M610 blade with VMware ESXi 4 installed and we need to update it's BIOS to the latest version. Unfortunately, Dell only makes available a Windows (.exe) and Linux (.bin) versions of ...
6
votes
3answers
782 views

Is paravirtualization evil?

I have an VMWare ESX Server v3.5 with a few virtualized Debian Lenny VMs (kernel 2.6.22 with vmi) running Apache Tomcat 5.5. I enabled paravirtualization, and Disk IO increased from about 240MB/s to ...
6
votes
4answers
2k views

SAN system upgrade/design

Greetings, I'm a long-time lurker, first time poster. For brevity, let me ask my question up-front and then give the longer backstory, so you can choose how much you want to read. Short version... ...
6
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3answers
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How does Linux determine the SCSI address of a disk?

Greetings, I'm working with RHEL 5.5 guest VMs under VMware ESX 4. When I configure the virtual disks in the VM hardware settings, each disk has a SCSI address in the format "N:M". For example, "1:3" ...
6
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3answers
3k views

VMware Virtual Machine Clustered Filesystem Setup

The situation is: I am running VMware ESX 3.5 (3 ESX Hosts w/ vCenter Server in a Cluster); I need five Virtual Machines to read from the same disk running a clustered file system; I cannot ...
5
votes
2answers
293 views

Networking with VMware, physical adapters and iSCSI

New VMware user here, setting up my first environment. I have an ESXi host that has four physical NiCs (NiC0, NiC1, NiC2, NiC3). I have installed ESXi, the VCVA appliance, and several VMs ...
5
votes
5answers
18k views

How to extend a Linux PV partition online after virtual disk growth

VMware allows to extend the size of a virtual disk online - when the VM is running. The next expected steps for Linux system are: extend the partition: delete and create a larger one with fdisk ...
5
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5answers
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VMware ESX Auditing

I'm looking to generate an excel spreadsheet with various information about each one of my company's ~140 VMs residing on 7 ESX 3.5 servers - specifically, the VM's: Name Allocated Memory, ...
5
votes
1answer
1k views

How does VMware ESX migrate a VM from one blade to another without losing any data?

I'm just trying to understand how ESX migrates a VM from one blade to another without any data loss...if I have a VM that is serving as a database server that is constantly getting data, is it able to ...
5
votes
3answers
10k views

copy vmware vmdk files while vm is running

I need to copy some VMs from one datastore to another. I'm running ESX 3.5 U3, VMs are mostly Windows-based. I don't care about data integrity since it's only to test NetApps deduplication on the ...
5
votes
2answers
463 views

What is VMWARE vSphere?

I am not a sys-admin but a programmer by trade. I know what ESX server is and how it works, I also know and use VMWARE Workstation products. But what is vSphere? From the marketing material it ...
5
votes
2answers
5k views

VMWare various disk type advantages/disadvantages

As we all know, we can create various disk types in VMWare: 0 : single growable virtual disk 1 : growable virtual disk split in 2GB files 2 : preallocated virtual disk 3 : preallocated virtual disk ...
5
votes
2answers
12k views

How much memory does ESXi require for itself?

I know that Microsoft suggests that you leave 1GB of memory for the parent partition on a Hyper-V server. Does VMware have a similar suggestion?
5
votes
1answer
3k views

What happens when a disk fails in LVM?

I am configuring a linux server on an ESX 4.1 host. This server needs to have several TBs of data stored on it. We are currently debating whether or not to use LVM. Our current reasoning is that is is ...
5
votes
1answer
2k views

How to configure mirror/span port on vSwitch?

I have vSphere. And I need to config SPAN/mirror port on vSwitch. How can I do that?
5
votes
3answers
5k views

using zabbix to monitor vmware datastores

The current vmware infrastructure is a mix of ESX and ESXi at 3, 3.5 and 4.1 releases. What I would like to achieve is being able to monitore the free space of the datastores through zabbix which is ...
5
votes
2answers
882 views

Apache's htcacheclean doesn't scale: How to tame a huge Apache disk_cache?

We have an Apache setup with a huge disk_cache (>500.000 entries, >50 GB disk space used). The cache grows by 16 GB every day. My problem is that the cache seems to be growing nearly as fast as it's ...
5
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5answers
10k views

Slow Read/Write Performance over iSCSI SAN

This is a new setup of ESXi 4.0 running VMs off of a Cybernetics miSAN D iSCSI SAN. Doing a high data read test on a VM, it took 8 minutes vs 1.5 minutes on the the same VM located on a slower VMWare ...
5
votes
2answers
463 views

vCenter Cluster CPU utilisation data inaccurate

We have quite a reasonably sized vSphere 'estate', with 80% of our Windows/Linux servers virtualised, running across six Datacentres. One of my challenges is medium to long term capacity planning, ...
5
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1answer
2k views

Single-thread app 50% slower on VMware X5650 than physical E5450

Our application runs 50% slower on a Xeon X5650 under ESX than on a bare-metal E5450. A test task on the physical servers takes 17 minutes. The same task on the virtual servers takes 25 minutes: 50% ...
5
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4answers
4k views

High Load Average with modest CPU Utilization and almost no IO

The usual explanation for high load average with little cpu use under linux is too much IO (or more properly uninterruptable sleep). I have a service running on a cluster of 2-core VMs that exhibit ...
4
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10answers
2k views

What recommendations would you give for implementing VMware Server, not ESX

I can't afford VMware infrastructure to do all the cool things, but I also don't have the money to buy a physical server for each and every machine I need, so I've been implementing some non-core ...
4
votes
4answers
180 views

Risk when deploying virtualized production servers without in-house virtualization expertise?

I've been asked to evaluate moving three production servers to a virtualization platform. The servers currently run Windows Server 2003 with a mix of applications that, given a catastrophic failure, ...