Just to clarify:
"Using Xen, you need to specify in advance the amount of memory for each virtual machine and create disk device and filesystem for it, and your abilities to change settings later on the fly are very limited."
Xen supports a balloon driver that can allows for one to add or take away from the memory allocated to guest operating systems (DomU's). It is highly advised to us LVM2 to allocate disk space for DomUs, since it allows for easy changes to the partition. This makes file system management easier.
"But most importantly, OpenVZ has the ability to access files and start from the host system programs inside VPS. It means that a damaged VPS (having lost network access or unbootable) can be easily repaired from the host system, and that a lot of operations related to management, configuring or software upgrade inside VPSs can be easily scripted and executed from the host system. In short, managing Xen virtual machines is like managing separate servers, but managing a group of VPSs on one computer is more like managing a single multi-user server."
Using LVM2 as the disk manager as mentioned above, the host operating system (Dom0) can access the DomU's filesystem for troubleshooting and run programs (though it would not be run in the scope of the DomU, I'm not sure that he's actually implying that is the case with OpenVZ).
--josh
"Could it be that a one company server package that will rival Microsoft's Windows Server 2003 and ASP will finally emerge?"
Redhat has long since won the battle in our 5000-server datacenter.
This is not a new desktop. This is a layer of separation between developers and the underlying graphics libraries Qt (KDE) and GTK (Gnome). This is so I can code an app using this new API and it will run and look good on both KDE and GTK systems.
An expectant mother was told by an RIAA representative that "the RIAA has been known to suggest that expectant mothers have an abortion in order reduce cost of living and over time be more able to afford settlements."
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Just to clarify: "Using Xen, you need to specify in advance the amount of memory for each virtual machine and create disk device and filesystem for it, and your abilities to change settings later on the fly are very limited." Xen supports a balloon driver that can allows for one to add or take away from the memory allocated to guest operating systems (DomU's). It is highly advised to us LVM2 to allocate disk space for DomUs, since it allows for easy changes to the partition. This makes file system management easier. "But most importantly, OpenVZ has the ability to access files and start from the host system programs inside VPS. It means that a damaged VPS (having lost network access or unbootable) can be easily repaired from the host system, and that a lot of operations related to management, configuring or software upgrade inside VPSs can be easily scripted and executed from the host system. In short, managing Xen virtual machines is like managing separate servers, but managing a group of VPSs on one computer is more like managing a single multi-user server." Using LVM2 as the disk manager as mentioned above, the host operating system (Dom0) can access the DomU's filesystem for troubleshooting and run programs (though it would not be run in the scope of the DomU, I'm not sure that he's actually implying that is the case with OpenVZ). --josh
"Could it be that a one company server package that will rival Microsoft's Windows Server 2003 and ASP will finally emerge?" Redhat has long since won the battle in our 5000-server datacenter.
It's true! It compressed my 10GB collection of ASCII PR0N into 1 meg!
This is not a new desktop. This is a layer of separation between developers and the underlying graphics libraries Qt (KDE) and GTK (Gnome). This is so I can code an app using this new API and it will run and look good on both KDE and GTK systems.
An expectant mother was told by an RIAA representative that "the RIAA has been known to suggest that expectant mothers have an abortion in order reduce cost of living and over time be more able to afford settlements."