Honestly, you shouldn’t have problems with NTP in a virtual environment and modern operating systems… It’s worth finding the root cause of that problem. If you can, make sure you have a good NTP infrastructure (I usually use an external NTP source or point everything to a core switch or router) and that you have … Read more
KVM has a much better snapshot capability than what’s managed by libvirt; but it depends on qcow2 images. if you use them, just do a savevm <name> on the command console (blocked by libvirt) it won’t create a new file, it’s a snapshot inside the qcow2 file. test it first, because some KVM versions have … Read more
Because the transfer speeds out of the ESXi console are purposefully limited. Because this isn’t scalable in any way. Because you’d have to drop a statically-compiled rsync binary onto the ESXi host. Because the VMs, the VMDKs, their ramdisk files and other components can change enough to make rsync a losing proposition… do you really … Read more
You need to rewrite that snapshot tree. The actual tree looks like this: SnapshotA SnapshotB SnapshotC Current When you took SnapshotA, the main vmdk file was frozen and a new delta file was created. All changes were written to the delta file from that point onwards. When you took SnapshotB, the first delta file was … Read more
Ignoring the fact that people are dealing with OS specific reasons I have two reasons why it’s a bad idea to not run with a swap partition/file. If you have 1.5 GB of RAM allocated to a VM with no space file/partition and it wants to use 1.5 GB + 1 MB it will report … Read more
Load average is based on the processes waiting in the run queue. That means if you have processes that use fractional time slices often you can see a high load average without a high CPU utilization. The best example of this is mail. The amount of CPU time require to send a message is very … Read more
Its actually possible to Run ESX as a virtual machine on your laptop:-) See the PDF here (Run VMWare ESX 3.5 & ESXI on Server 2.0 link) Also here Ran pretty well on a Dell laptop – as long as the Processor has V enabled in the bios and is compatible
You can do this without a reboot. pvresize doesn’t resize the physical volume until the partition is updated with the added space. You must fdisk the partition and recreate it with the the new full size of the disk, after you can rescan’d the drives for it to see the extra space in the first … Read more
Yes you can. Even for some Windows 2003 workloads as little as 384MiB suffices, so 512MiB is a pretty good estimation, be it a little high. RAM should not be a problem, neither should CPU. A 100 VMs is a bit steep, but it is doable, especially if the VMs are not going to be … Read more
VMWare ESX or ESXi CAN run inside a virtual machine, provided certain prerequisites are satisfied. This kind of setup is of course completely useless (and totally unsupported) in a production environment, but can be very useful for two purposes: Testing or studying ESX or ESXi if you don’t have a physical server available. Testing or … Read more