running on Opteron 285 Dual-CPU Dual-Core and Xeon MPs.. and the results are:
1. ESX 2.5 more stable than MS Virtual Server 2005 R2 when running over 50% CPU Utilization for multiple VMs and close to using up all the physical memory.
2. ESX 2.5 needs to run on certified hardware (and this means that the latest devices such as SATA drives are not supported). ESX host OS is based on RedHat, ESX can also run 1 VM almost at bare-metal performance.
MS Virtual Server and VMWare Server (aka GSX) use the Host OS to drive the devices so the new devices should be OK (but VMs will run slower)
3. Running 64bit Guests over 64bit Host require special hardware CPU support (Stepping-F on AMD and VTx on Intel--look for the Intel D 9xx models)
4. I/O is the number one problem for VMs: if you have a high I/O applications such as file or database server, VMs will give much lower performance compared to dedicated servers.
5. Disaster recovery is where VMs shine as you move images to different physical servers. VMs are immune to device driver dependencies (as long as the host OS supports the bare metal devices)..ESX allows you to move VMs even while they are running.
Sign up for the VMWare Server (formerly GSX) Beta...it is free.
And remember that VMs are only as good as bare hardware you are running on.
Ambo
Miguel A Paraz <[EMAIL PROTECTED]> wrote:
On 5/2/06, Paul Patrick Carpio Prantilla <[EMAIL PROTECTED]> wrote:
> I'd just like to ask if anybody here has tried out Virtual hosting with
> virtual private servers (VPS) as opposed to dedicated hosting. While I
> do maintenance with dedicated hosting, I haven't personally managed a
> VPS yet. I'd also like to confirm from those who tried it if it is
> indeed like having a dedicated server (and thus being able to configure
> and have access to the whole operating system unlike shared hosting)
> performance-wise.
>
> Despite their popularity, I guess I'm still not used to the concept of
> using deploying important business applications in virtual machines from
> Xen,vmware,etc.
For work, I'm using:
- VMWare Server (still beta) on a big RHEL4 machine, subdivided into
smaller VMs, for "dev boxes"
- Microsoft Virtual Server on my Windows XP laptop, hosting Fedora Core 5.
These are not "web hosting" though, which I believe is your application?
For personal use, I've done web hosting using rimuhosting.com - they
started with UserModeLinux and have switched to Xen. I haven't tried
Xen configuration myself, though.
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