01-13-2009
Sometimes we do micropartitioning in our production and failover environments, sometimes the partitions are on seperate hosts.
It's really my preference to have relating DB/App severs on the same host. This way we can create virtual network devices and any app-DB communication can be done via the backplane rather than over the physical network. The real setback for using this strategy is cost. It generally will cost less to buy 2 systems with half the memory than 1 with double the memory. This is slightly less of a problem with Power 6 as IBM has added additional RAM slots per module.
When we get into the VIO type of virtualization, we keep that to our development and QA environments. If we put that into production I'd spend half of every week on conference calls determining who is slowing who else down, or proving that it isn't happening.
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LEARN ABOUT CENTOS
systemd-detect-virt
SYSTEMD-DETECT-VIRT(1) systemd-detect-virt SYSTEMD-DETECT-VIRT(1)
NAME
systemd-detect-virt - Detect execution in a virtualized environment
SYNOPSIS
systemd-detect-virt [OPTIONS...]
DESCRIPTION
systemd-detect-virt detects execution in a virtualized environment. It identifies the virtualization technology and can distinguish full VM
virtualization from container virtualization.
When executed without --quiet will print a short identifier for the detected virtualization technology. The following technologies are
currently identified: qemu, kvm, vmware, microsoft, oracle, xen, bochs, chroot, uml, openvz, lxc, lxc-libvirt, systemd-nspawn.
If multiple virtualization solutions are used, only the "innermost" is detected and identified. That means if both VM virtualization and
container virtualization are used in conjunction, only the latter will be identified (unless --vm is passed).
OPTIONS
The following options are understood:
-h, --help
Prints a short help text and exits.
--version
Prints a short version string and exits.
-c, --container
Only detects container virtualization (i.e. shared kernel virtualization).
-v, --vm
Only detects VM virtualization (i.e. full hardware virtualization).
-q, --quiet
Suppress output of the virtualization technology identifier.
EXIT STATUS
If a virtualization technology is detected, 0 is returned, a non-zero code otherwise.
SEE ALSO
systemd(1)
systemd 208 SYSTEMD-DETECT-VIRT(1)